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Home My WebLink AboutCIRI-ANC-CAEC Mountain View Elementary School 2012-EEENERGY AUDIT FINAL REPORT Mountain View Elementary School 4005 McPhee Avenue Anchorage, AK 99517 p (907) 742-3900 AkWarm ID No. CIRI-ANC-CAEC-16 800 F Street Anchorage, AK 99501 p (907) 276-6664 f (907) 276-5042 Contact: Walter Heins, PE, CCP, CxA, CEA 32215 Lakefront Dr. Soldotna, Alaska 99669 p (907) 260-5311 Contact: Jerry P. Herring, PE, CEA Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 i AkWarm No. CIRI-ANC-CAEC-16 Contents I. Executive Summary .................................................................................................................. 1 II. Introduction .............................................................................................................................. 2 III. Energy Audit Process ............................................................................................................. 3 IV. Method of Analysis ................................................................................................................. 4 V. Building Description ................................................................................................................ 5 V.I ARCHITECTURAL DESCRIPTION ............................................................................................................................ 6 V.II MECHANICAL DESCRIPTION ............................................................................................................................... 6 V.III ELECTRICAL DESCRIPTION ................................................................................................................................ 7 V.IV PORTABLE BUILDING DESCRIPTION .................................................................................................................. 9 VI. Historic Energy Consumption and Cost............................................................................. 10 VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 10 VI.II NATURAL GAS CONSUMPTION DATA .............................................................................................................. 10 VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 10 VII. Equipment Inventory and Photo Survey .......................................................................... 12 VIII. Energy Conservation Measures ....................................................................................... 13 VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 13 VIII.II PORTABLE BUILDING ENERGY CONSERVATION MEASURES ......................................................................... 18 VIII.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ....................................... 20 Appendices Appendix A – Energy Benchmark Data Appendix B – AkWarm Commercial Reports Appendix C – Major Equipment List Appendix D – Energy Conservation Measures – Mountain View Elementary School Appendix E – Energy Conservation Measures – Mountain View Portable Building Appendix F – Site Survey Photos Appendix G – Thermographic Photos Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 ii AkWarm No. CIRI-ANC-CAEC-16 Abbreviations AHFC Alaska Housing & Finance Corporation ARRA American Recovery & Reinvestment Act ASD Anchorage School District ASHRAE American Society of Heating, Refrigeration, and Air-Conditioning Engineers BTU British Thermal Unit CCF One Hundred Cubic Feet CFM Cubic Feet per Minute DDC Direct Digital Control ECI Energy Cost Index ECM Energy Conservation Measure EUI Energy Utilization Index F Fahrenheit HP horsepower HPS High Pressure Sodium HVAC Heating, Ventilating, and Air-Conditioning in inch(es) IPLC Integrated Power & Load Circuit kWh kilowatt-hour LED Light-Emitting Diode O&M Operations & Maintenance sf square feet SIR Savings-to-Investment Ratio V Volts W Watts Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 iii AkWarm No. CIRI-ANC-CAEC-16 List of Figures Fig. 1 – Energy Audit Clients ....................................................................................................................... 1 Fig. 2 – Energy Benchmark Data .................................................................................................................. 1 Fig. 3 – Anchorage, Alaska – Google Maps ................................................................................................. 2 Fig. 4 – Mountain View Elementary School – Google Maps ....................................................................... 2 Fig. 5 – Mountain View Elementary Floor Plan ........................................................................................... 5 List of Tables Table 1. Recommended Energy Conservation Measures, Mountain View Elementary ............................... 2 Table 2. Recommended Energy Conservation Measures, Portable Building ............................................... 1 Table 3. Building History ............................................................................................................................. 5 Table 4. Energy Cost and Consumption Data ............................................................................................. 10 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 iv AkWarm No. CIRI-ANC-CAEC-16 REPORT DISCLAIMER Privacy The information contained within this report, including any attachment(s), was produced under contract to Alaska Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be incorporated into AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or public information systems. AkWarm-C is a building energy modeling software developed under contract by AHFC. Limitations of Study This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of input data provided. Not all data could be verified and no destructive testing or investigations were undertaken. Some data may have been incomplete. This report is not intended to be a final design document. Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design. Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work performed as a result of this report. Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the forecasted financial ratios. The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings. Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting quality. The new generation lighting systems have significantly longer life leading to long term labor savings, especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7 years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the performance of students and workers in the built environment. New lighting systems can be designed to address all of the above benefits. US Government Disclaimer This material is based upon work supported by the Department of Energy under Award Number DE-EE0000095. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 1 AkWarm No. CIRI-ANC-CAEC-16 I. Executive Summary This report presents the findings of an energy audit conducted at Mountain View Elementary School as part of a contract for: Alaska Housing Finance Corporation Contact: Rebekah Luhrs 4300 Boniface Parkway Anchorage, AK 99510 Email: rluhrs@ahfc.us Anchorage School District Contact: Calvin Mundt 1301 Labar Street Anchorage, AK 99517 Email: mundt_calvin@asdk12.org Fig. 1 – Energy Audit Clients This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State of Alaska’s economy. This can be achieved through the wiser and more efficient use of energy. The average January 2009-December 2010 documented annual utility costs at this facility are as follows: Electricity $66,433 Natural Gas $46,199 Total $112,642 January 2009-December 2010 Energy Utilization Index (EUI) = 113.7 kBtu/sf January 2009-December 2010 Energy Cost Index = 1.91 $/sf Fig. 2 – Energy Benchmark Data Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive Summary Table with the energy analyst’s best opinion of probable cost, savings, and investment returns. Be aware that the measures are not additive because of the interrelation of several of the measures. The cost of each measure for this level of auditing is ± 30% until detailed engineering, specifications, and hard proposals are obtained. See section VIII for detailed descriptions of all cost effective ECMs. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 2 AkWarm No. CIRI-ANC-CAEC-16 Table 1. Recommended Energy Conservation Measures, Mountain View Elementary Executive Summary – Recommended ECMs Mountain View Elementary School (MES) Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) MES-0a Refrigerators Replace light commercial refrigerators/freezers older than 5 years old -- - <10 MES-1 b Boiler Shutdown Shutdown boilers during summer months $1,379 $720 30.95 0.5 MES-2 Setback Thermostat: Classrooms/ Offices, and Gym/MPR Implement a Heating Temperatures Unoccupied Setback to 60.0 deg F for the classrooms, offices, gym, and multipurpose room $4,279 $556 12.91 0.13 MES-3 Lighting: Library Add new Occupancy Sensors $555 $900 9.02 1.6 MES-4 Lighting: Classrooms Add new Occupancy Sensors, and Replace T12 Light Fixtures with T8 Light Fixtures $2,562 $4,351 2.52 1.7 MES-5 Lighting: Student Restrooms Replace with 16 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $481 $3,300 2.13 6.9 MES-6 Lighting: Corridors Replace T12 Light Fixtures with T8 Light Fixtures, Replace 3-Lamp T8 Light Fixtures with 2-Lamp Light Fixtures, Reduce Light Fixture Quantities $2,348 $15,650 2.19 6.67 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 3 AkWarm No. CIRI-ANC-CAEC-16 Executive Summary – Recommended ECMs Mountain View Elementary School (MES) Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) MES-7 Lighting: Offices Add new Occupancy Sensors, and Replace T12 Light Fixtures with T8 Light Fixtures. Replace Incandescent Lamps with Compact Fluorescent Lamps $1,841 $16,680 1.61 9.1 MES-8 Lighting: Exterior Replace High Pressure Sodium Light Fixtures with LED Light Fixtures. Replace Inoperable Photocells. $2,759 $26,700 1.51 9.7 MES-9 Lighting: Trophy Cases Replace with 12 FLUOR T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensors $277 $2,850 1.41 10.3 MES-10 Lighting: Multi- Purpose Room Replace Incandescent Lamps with Compact Fluorescent Lamps, Replace Metal Halide Light Fixtures with Fluorescent T5HO Light Fixtures, Add new Occupancy Sensors $765 $9,960 1.09 13.0 MES-11 Air Tightening Perform air sealing to reduce air leakage by 20% $1,785 $15,000 1.06 8.4 MES-12 b HVAC and DHW Install VFDs on 5HP pumps and EC motors on pumps less than 1HP $2,180 $35,000 0.94 16.0 Notes: a Due to advances in refrigerators in the previous 5 years, new Energy Star refrigerators are much more efficient and result in viable energy savings. b ECM item was modeled with separate AkWarm model and as a result, the item is not an additive measure and is not included in the final totals. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 1 AkWarm No. CIRI-ANC-CAEC-16 Table 2. Recommended Energy Conservation Measures, Portable Building Executive Summary – Recommended ECMs Mountain View Portable Building (PB) Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) PB-1 Setback Thermostat: Portable Building Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. $780 $1,000 9.57 1.3 PB-2 Portable Building Skirting Install R-15 rigid foam board to interior or exterior side of wall. Does not include cost of coverings $782 $1,624 9.97 2.1 PB-3 Lighting: Portable lighting Replace with FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $421 $2,250 2.88 5.3 PB-4 Exterior Door: Portable Building - Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $90 $781 2.38 8.7 PB-5 Air Tightening Perform air sealing to reduce air leakage by 30%. $112 $980 1.00 8.8 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 2 AkWarm No. CIRI-ANC-CAEC-16 II. Introduction This energy audit was conducted at Mountain View Elementary School (MES) for AHFC and Anchorage School District (ASD). The school is a 59,118 square foot (sf) campus that includes a 58,158 sf school and a 960 sf portable building. The school consists of classrooms, locker rooms, restrooms, administrative offices, a library, a gymnasium, a kitchen, and a multipurpose room. The location of the school is shown in the following regional and overhead images. The energy audit was conducted in order to evaluate areas and equipment where energy savings can be realized. The savings are then compared to a baseline and evaluated for reasonable project financial ratios and payback. Fig. 3 – Anchorage, Alaska – Google Maps Fig. 4 – Mountain View Elementary School – Google Maps Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 3 AkWarm No. CIRI-ANC-CAEC-16 III. Energy Audit Process Prior to visiting the school, the first task was to collect and review two years of utility data for electricity and natural gas usage. This information was used to analyze operational characteristics, calculate energy benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to monitor the effectiveness of implemented energy conservation measures. A spreadsheet was used to enter, sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see Section VI). After gathering the utility data and calculating the EUI, the next step in the audit process was to review the architectural and engineering drawings to develop a building profile which documented building age, type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating, and Air Conditioning (HVAC), water heating, refrigeration, snow-melt, and etc. The building profile is utilized to generate, and answer, all possible questions regarding the facility’s energy usage. These questions were then compared to the energy usage profiles developed during the utility data gathering step. After this information was gathered, the next step in the process was to conduct a site survey. A site survey was completed on December 8, 2011. Time was spent inspecting the building systems that impact energy consumption and answering questions from the preliminary review of the school. The on- site contact during the investigation was Mr. Chris Lynch of the ASD Facilities Department1. The following information was also collected while on site: occupancy schedules, O&M practices, building energy management program, and other information that has an impact on energy consumption. The following energy audit includes an evaluation of the information gathered, the researching of possible conservation opportunities, organizing the audit into a comprehensive report, and making ECM recommendations for mechanical, electrical, and building envelope improvements. 1 Mr. Chris Lynch, (907) 348-5250 (office), (907) 748-2643 (mobile) Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 4 AkWarm No. CIRI-ANC-CAEC-16 IV. Method of Analysis Having completed the preliminary energy audit tasks, Coffman Engineers, Inc., (CEI) conducted a site survey. The site survey provides critical input in deciphering where energy savings opportunities exist within a facility. The audit team from CEI walked the entire site to inventory and investigate the building envelope and major equipment, including: HVAC, water heating, lighting, and equipment located throughout. An understanding of how the equipment is used is determined during the site survey. The collected data was entered into AkWarm Commercial™ software, an energy calculating program for buildings. The data was processed by AkWarm to model a baseline from which ECMs could be considered. The model was compared to actual utility costs to ensure the quality of the baseline and proposed energy modeling performed by AkWarm. The recommended ECMs focus on the building envelope, HVAC, lighting, water heating, and other electrical measures that will reduce annual energy consumption. ECMs are evaluated based on building use and processes, local climate conditions, building construction type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment is proposed, energy consumption is calculated based on the manufacturer’s cataloged information. Energy savings are calculated by AkWarm. Implementation of more than one ECM often affects the savings of other ECMs. The savings may in some cases be relatively higher for an ECM implemented individually than when that ECM is just one of multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient lighting systems may result in a given savings. Also implementing a more efficient lighting system will add to the savings, but less than the efficient lighting would alone because there is less energy to be saved when the lights are on a reduced operating schedule. Thus, if multiple ECM’s are recommended, the combined savings are calculated and identified appropriately in groups. In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM, which is based on the typical life of the equipment being replaced or altered. The energy savings are extrapolated throughout the simple lifetime of the ECM. The total energy savings is calculated as the total lifetime multiplied by the yearly energy savings. The cost savings and installation costs are used to calculate simple payback2 and the Savings to Investment Ratio3 (SIR). These are listed in Appendix D and summarized in the Executive Summary Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed cost. Cost savings is calculated based on the historical energy costs for the building. Installation costs include labor and equipment to evaluate the initial investment required to implement an ECM. These are applied to each recommendation with simple paybacks calculated. The energy analyst’s opinions of probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net savings. 2 The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost divided by Savings). 3 Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over the life of the measure minus PV of maintenance costs. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 5 AkWarm No. CIRI-ANC-CAEC-16 V. Building Description Mountain View Elementary School is a single story building consisting of classrooms, administrative offices, a gymnasium, a multipurpose room, a library, and several utility spaces. The school is arranged into three wings of classroom spaces with the gymnasium, multipurpose room, and administrative offices located in the center as can be seen in Figure 5 below. Fig. 5 – Mountain View Elementary Floor Plan A portable building, using electric resistance heat, is located on the school campus and is occupied one day per week. The school was originally constructed in 1956 and has undergone several major additions and renovations throughout its history. A brief list of these major projects and years completed are shown below. Table 3. Building History Airport Heights Elementary – Building History* Date Addition or Renovation 1956 Original Construction. 1970 Classroom and Office Addition 1983 Classroom and Gymnasium Addition 1983 Heating System Renovation 1988 Office Area Renovation 1991 Roof Renovation 1997 Boiler Replacement 2001/2003 Lighting Upgrades 2004 Roof Replacement 2005 HVAC Upgrades *History is based on available drawings from ASD. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 6 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary School is occupied by approximately 380 people from 7am-11pm weekdays from August through May. Most of the building, except the main office and maintenance areas is unoccupied and shut down from June to July. V.I Architectural Description Most of the school’s original construction exterior walls are 10’ high and composed of 6” thick poured concrete lined with furring strips on 16” centers, 2” blanket insulation and plywood sheathing. The exterior walls along the East and West face of the school building are composed of 6” concrete blocks, 2” rigid insulation, and a 4” brick veneer. These walls have an estimated R-value of R-3.5. The exterior wall of the multipurpose room is approximately 18’ high and is constructed with 8” poured concrete overlaid with 2” rigid insulation and metal siding (R-14.1). Exterior walls of the 1970 addition are 11’-4” high and are composed of 8” concrete blocks with 2” furring strips, 2” blanket insulation, and plywood sheathing (R-3.5). The exterior walls of the 1983 addition are composed of 8” concrete blocks with 4” rigid insulation and a finishing system (R-19.9). Analysis of the architectural and construction drawings for the building shows a total of 20,147 sf of wall area. The school’s flooring construction details are from an analysis of the architectural and construction drawings. The floors in the building’s original construction area consist of 4” thick concrete slab on grade with a 1” rigid perimeter insulation extending to the footing. The perimeter insulation in this area appears to be located on the interior face of the foundation wall. Flooring in the newer construction areas is also 4” thick concrete slab on grade but has 4” rigid perimeter insulation that extends to the footing and lies external to the foundation wall. There is approximately 54,628 sf of slab on grade floor area for the school. An additional 3,530 sf of floor area comes from a fan room and a storage area on the second floor, and an additional mechanical room on the first floor. The total square footage of the building is 58,158 sf. The school’s original construction area has a built-up flat roof containing a metal deck, 2” rigid insulation and sheet metal flashing. The roof of the school’s 1970 addition is also a built-up flat roof but has 1.5” metal decking, a vapor barrier, and 3” rigid insulation. The roof of the 1983 addition was replaced in 2005 with a 2-ply vapor barrier, 1/2” gypsum sheathing, R-30 rigid insulation, a fiberglass base overlaid with 3-ply roofing and an SBS mineral cap sheet. The approximate overall R-value for the roof construction is R-32.6. Analysis of the architectural and construction drawings shows a total roof area of 54,628 sf. The school has approximately 150 double pane, 1/2” air space, aluminum frame windows with an effective R-value of R-1.2. From the architectural drawings, the window headers appear to be insulated. The total South facing window area for the school is approximately 2,903 sf. All other window areas for the school total approximately 365 sf. There are eight windowless exterior man doors located around the school that are hollow metal with insulated cores with an effective R-value of R-2.5. There are 14 hollow, metal entryway doors with insulated cores and half lite windows that provide an effective R-value of R-2.2. Several of the doors were installed during the original construction of the school and are approximately 55 years old. All of the building’s exterior doors have weather stripping in fair condition. V.II Mechanical Description The school is heated using four gas-fired, cast-iron, sectional boilers. Boilers B-1 and B-2 are Burnham PF-505 series boilers that were installed in 1983 and are equipped with Power Flame CR1-G-12 burners that have a 996 MBH input rating. These boilers operate year round providing building heat to the 1983 classroom addition and have direct digital controls (DDC). The rest of the school is served by two Weil- McLain model 1388 boilers, B-3 and B-4. These boilers were installed in 1998 and are equipped with Gordon Piatt R10.1-G-30 burners that have a 2,840 MBH input rating each. Boilers B-3 and B-4 also Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 7 AkWarm No. CIRI-ANC-CAEC-16 operate year round and have DDC controls. A boiler circulation pump is provided for each boiler. The circulation pumps for the two Burnham boilers are 3/4 HP Bell & Gossett inline pumps while the circulation pumps for the two Weil-McLain boilers are 2 HP Armstrong inline pumps. It was reported that all of the boilers have been operating at temperatures higher than recommended, which may be due to a combination of the location of the return water temperature sensor in the hot water header and current DDC setpoints. An A. O. Smith BT-100-926 gas-fired, 100 gallon domestic hot water heater and a Grundfos UP 25-64SF 180 watt inline circulation pump are located in the mechanical room. An A. O. Smith BT-140-540 gas- fired, 140 gallon domestic hot water heater and a Grundfos UPS-15-42ST 85 Watt inline circulation pump are located in the boiler room. These domestic hot water heaters and circulation pumps are used to provide hot water for the school and kitchen areas. There are eight air handling units (AHUs) located throughout the building which provide supply air tempered using hot water coils. Due to multiple HVAC renovation projects, the AHUs are not labeled in sequential order and some labels are used more than once. Refer to Appendix C, Major Equipment List, for a detailed listing of each AHU by location. AHU-1 (1983), a Trane No. 17B Climate Changer, serves the 1983 addition classrooms with 8,620 CFM of conditioned air using a 7.5 HP fan. AHU-2 (1983), a Trane No. 8A Climate Changer, supplies the gym with 4,500 CFM using a 3 HP fan. AHU-5 (1956), an American Blower Company 215, supplies 5,500 CFM of condition air to the multipurpose room using a 2 HP fan. AHU-1 (2005), a Haakon WH0602A, provides 4,000 CFM to the Northwest classrooms of the original construction area using a 3 HP fan. AHU-2 (2005), a Haakon WH0901A, provides 7,200 CFM to the Southwest classrooms of the original construction area using a 5 HP fan. AHU-7 (2005), a Haakon WQ0801A, provides 4,800 CFM of air to the Southeast classrooms of the original construction area using a 3 HP fan. AHU-8 (2005), a Haakon WQ0602A, provides 3,600 CFM to the Northeast classrooms of the original construction area using a 3 HP fan. AHU-9 supplies the school’s 1970 addition and is located in a fan room above the library entrance. Access was restricted to this area preventing inspection on the day of the CEI site survey. An older roof-top AHU (1956), a Pace A18FO, is no longer used and is not in service. No mechanical cooling is provided for any equipment in the building. Mechanical ventilation for the building is also provided by relief fans, supply fans, and exhaust fans located on the roof and throughout the building. RF-1 is a roof-mounted centrifugal relief fan with a 3 HP motor equipped with a variable frequency drive (VFD). RF-2 is also a roof-mounted centrifugal relief fan with a 2 HP motor equipped with a VFD. RF-1A is a return fan with a 2 HP motor located in the fan room. Supply fan F-1 is a centrifugal fan with a 3/4 HP motor that supplies combustion air to the boiler room. VF-1 is a centrifugal supply fan with a 240 W motor. Exhaust fans EF-1, EF-2, EF-3, and EF-6 are roof-mounted units and are each equipped with fractional horsepower motors. These fans ventilate the school’s restrooms. Exhaust fans EF-4 and EF-5 are roof-mounted units equipped with 1 HP motors and ventilate the mechanical room. EF-4A, an exhaust fan with a 1 HP motor, provides recirculation to the multipurpose room. See Appendix C, Major Equipment List, for a detailed list of the ventilation units. The school’s building energy management and control system was originally pneumatically controlled. In 2005, all pneumatic controls were replaced with a direct digital control system. V.III Electrical Description The school is served by a 1200 amp (A), 120/208 volt (V), three phase, 4-wire, underground electrical service connected to a pad mounted utility transformer. Electricity is distributed throughout the school via three main distribution panels that feed numerous small distribution panels scattered throughout the school. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 8 AkWarm No. CIRI-ANC-CAEC-16 Lighting in the corridors was originally provided by fluorescent T12 light fixtures but many portions of the school have been upgraded to T8 lighting, to conserve energy. The lighting levels are adequate throughout most of the corridors, however they are in excess of the IESNA suggested lighting levels in one portion of the school with the upgraded T8 lighting. Numerous nightlights with battery backed emergency ballasts are present in the corridors; all other fixtures are controlled by a contactor interfaced with the security system that shuts the corridor lights off while the security system is armed. A few trophy cases are present in the corridors. One set is illuminated by two fluorescent single lamp T12 strip lights that are controlled by a local light switch. The other set of trophy cases is illuminated by about (12) two- lamp, 3’ T12 light fixtures that appear to be controlled by the same contactor as the corridor lights. The library lighting is provided by 3-lamp T8 Fluorescent light fixtures and recessed down lights with two 26 watt (W) compact fluorescent lamps (CFL). The library lighting is split into multiple zones, all controlled by wall switches. The lighting in nearly all of the classrooms has been upgraded to three and four lamp fluorescent T8 lighting with the exception to one small resource room with four three-lamp T12 light fixtures. Approximately 75% of the T8 light fixtures are provided with bi-level switching where two lamps are controlled by one wall switch and the remaining lamps are controlled by a second switch. The balance of the lights are controlled by a single light switch. Many of the classrooms are also equipped with a small restroom for student use. These spaces are illuminated by a mixture of T8, T12, and circline T9 fluorescent lighting along with some 60W incandescent lights. All of the classroom restroom lights are controlled by local wall switches The office spaces in the school are primarily illuminated by fluorescent two and three-lamp T12 light fixtures and approximately 15% of the spaces have been upgraded to three-lamp T8 lighting. All of the fluorescent light fixtures are controlled by wall switches. Additionally there is a single incandescent lamp used for task lighting in room 53. The multi-purpose room (MPR) is illuminated by 400W metal halide (MH) high bay light fixtures that are controlled by wall switches. These types of light fixtures are difficult to switch frequently due to a long start up time and therefore usually remain on the entire time that the building is occupied. There is also a stage area integrated into the MPR with two small semi-enclosed stairways leading to it from the MPR. Each stairway is illuminated by a two-lamp 60W incandescent light fixture that is controlled by a wall switch. A discussion with the staff revealed that these light fixtures are commonly left on while the space is unoccupied. Lighting in the student restrooms is provided by two-lamp T12 fluorescent lighting that appears to be controlled by the same lighting contactor that controls the corridor lighting. The gymnasium lighting consists of (21) four-lamp fluorescent T5HO fixtures that are controlled by wall switches. A few small storage areas used for housing gym equipment are illuminated by a mixture of T8 and T12 light fixtures and are controlled by wall switches. The Kitchen is illuminated by approximately (17) two-lamp T12 light fixtures with magnetic ballasts. These light fixtures are controlled by a wall switch. Exterior of the school building is illuminated by several 150W high pressure sodium (HPS) wallpack and canopy lights. The walkways and parking areas are illuminated by 150W pole mounted LED light fixtures. The playground and skating rink are illuminated by 400W HPS pole mounted light fixtures. The building mounted wallpack and canopy lights are controlled by several photocells that, when functioning correctly, switch the lights off during the day. Several of these photocells were observed to be inoperable, leaving a few of the light fixtures on continuously. The pole mounted light fixtures are all controlled by a Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 9 AkWarm No. CIRI-ANC-CAEC-16 central photocell controlled contactor that shuts the lights off during the day. The contactor is also interfaced with the security system to shut the lights off when the building security system is alarmed. Other electricity-using equipment not previously described in the mechanical or electrical sections include a commercial reach-in freezer, a commercial reach-in refrigerator, a microwave and other kitchen equipment, and various user equipment such as projectors, computers, and printers. V.IV Portable Building Description There is a single, 960 sf portable building located on the Mountain View Elementary school campus. It is minimally occupied approximately one day per week. The portable was constructed in 1983 and consists of 2”x4” wood studs on 16” centers with R-11 fiberglass batt insulation for a combined R-value of R- 11.4. The exterior face of the wall is T1-11 siding with drywall on the interior. The exterior wall height is nine feet under the roof eaves, and the end walls vary in height up to 11’ at the roof peak. The portable building has 1,280 sf of exterior wall area. The portable has an above grade floor resting on sleepers. Plywood skirting protects the sleepers and floor construction from the weather. The floor construction is plywood flooring resting on 2x8 wood joists with R-13 fiberglass batt insulation. The portable has 960 sf of floor area. The portable is covered by a cold roof with shingles on top of a plywood decking. It is estimated that the roof is insulated with R-13 fiberglass batt insulation. The portable has approximately 1,012 sf of roof area. There are two double pane, wood framed windows in the portable with an estimated R-value of R-2.0. There are two insulated metal doors with an R-value of R-1.7 for each door. The portable is heated by electric resistance perimeter baseboards where the temperature set point is controlled by a dial thermostat on each individual baseboard. This makes it easy for the electric baseboards to be left on at higher temperatures than is required. Building occupants confirmed that the portable building is often overheated. Due to the need to keep these buildings moveable and due to combustion safety issues, the Anchorage School District states its desire to keep all portable buildings on electric heat and not utilize natural gas heating at this time. A 120/208V single phase overhead feeder is supplied to the portable building from the school building. The service terminates in a small distribution panel that distributes power to the portable's lighting, heating, and receptacles. The lighting in the portable is provided by (12) four-lamp, 4’ long, T12 light fixtures with magnetic ballasts. The 4’ fluorescent fixtures are controlled by wall switches. Additionally there is a single 2’x2’ recessed troffer with two 40W U-tube T12 lamps with a magnetic ballast that is not switched and is on continuously. A separate AkWarm model was created to model this portable building. See Appendix E, Energy Conservation Measures – Mountain View Portable Buildings, for details of the recommended ECMs for the portable building. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 10 AkWarm No. CIRI-ANC-CAEC-16 VI. Historic Energy Consumption and Cost Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and natural gas energy usage for the surveyed facility from January 2009 to December 2010. Anchorage Municipal Lighting &Power provides the electricity and Enstar Natural Gas provides the natural gas to the building. Both utility companies bill the facility using a commercial rate schedule. The actual utility bills were not provided to be able to verify the data received to assure 100 percent accuracy of the data. The AkWarm model of the facility was built to match the facility’s average annual electric and natural gas consumption, so that a realistic model could be created. The monthly energy consumption of the AkWarm model matches the actual average monthly consumption of the facility within 25%, which is adequate for this level of modeling. Overall, the energy consumption trends of the AkWarm model and the actual facility match appropriately. Graphical representations of the monthly energy consumption are included in Appendix A. VI.I Electrical Consumption Data The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the customer's usage as measured in kilowatt-hours (kWh). The usage (kWh) is determined by load wattage divided by 1,000, times hours running. For example, a 1,000 watt load operating for one hour will use 1 kWh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp operating for 10 hours. One kWh is equivalent to 3,413 BTU. Utility data used in this report reflects the historical data provided for the building in a summarized format. VI.II Natural Gas Consumption Data The natural gas supplier bills for consumption in CCF of natural gas; where one CCF equals 100 cubic feet of natural gas. The average heating value of natural gas is 1,000 BTUs per cubic foot, making 1 CCF equal to 100,000 BTUs (also called one “Therm”). VI.III Overall Energy Consumption Data The overall cost for energy use is calculated by dividing the total cost by the total usage. Based on the electric and fuel oil utility data provided, the average cost for the energy and consumption calculations at the surveyed facility are summarized in the table below. Table 4. Energy Cost and Consumption Data Energy Cost and Consumption Data 2009 2010 Average Electric 0.12 $/kWh 0.13 $/kWh 0.13 $/kWh Natural Gas 1.00 $/CCF 0.87 $/CCF 0.94 $/CCF Total Cost $116,090 $109,193 $112,642 ECI 1.96 $/sf 1.85 $/sf 1.91 $/sf Electric EUI 30.1 kBtu/sf 30.7 kBtu/sf 30.4 kBtu/sf Natural Gas EUI 86.8 kBtu/sf 79.7 kBtu/sf 83.2 kBtu/sf Building EUI 116.9 kBtu/sf 110.4 kBtu/sf 113.6 kBtu/sf The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The building square footage was calculated to be approximately 59,118 sf. This area includes the 58,158 sf school and the 960 sf portable building. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 11 AkWarm No. CIRI-ANC-CAEC-16 The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kBtu/sf) and can be used to compare energy consumption of similar building types or to track consumption from year to year in the same building. The EUI is calculated by converting annual consumption of all fuels used to Btu’s and then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator of the relative potential for energy savings. A comparatively low EUI indicates less potential for large energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to calculate and verify the gross area of the facility. The gross area was confirmed on the physical site investigation. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 12 AkWarm No. CIRI-ANC-CAEC-16 VII. Equipment Inventory and Photo Survey Following the completion of the field survey a detailed equipment list was created and is attached as Appendix C. The major equipment listed are considered to be the major energy consuming equipment in the building whose replacement could yield substantial energy savings. An approximate age was assigned to the equipment if a manufactured date was not shown on the equipment’s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37, Table 4, the service life for the equipment along with the remaining useful life in accordance to the ASHRAE standard are also noted in the equipment list. Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an indication that maintenance costs are likely on the rise and more efficient replacement equipment is available which will lower the operating costs of the unit. Maintenance costs should also fall with the replacement. Additionally, photos of various equipment and the building construction were taken during the site visit. Several photos are included in Appendix F. CEI made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This is not a thermographic study, but rather just a few snapshots to illustrate easy-to-identify heat losses. These thermographic photos are included in Appendix G. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 13 AkWarm No. CIRI-ANC-CAEC-16 VIII. Energy Conservation Measures VIII.I School Energy Conservation Measures ECM# MES-0 – Replace light commercial refrigerators/freezers older than 5 years old Annual Energy Savings Installed Cost SIR Payback (years) ---<10 years Due to advances in refrigerators in the previous five years, new Energy Star refrigerators and freezers are significantly more efficient than previous models. Replacing existing refrigerators and freezers, which are older than five years old, with new energy star models will typically have paybacks of less than 10 years. ECM # MES-1– Shutdown Boilers During Summer Months Annual Energy Savings Installed Cost SIR Payback (years) $1,379 $720 30.95 0.5 The four gas fired boilers in the building operate year round, even during the summer when limited heating needs are required. By turning off the boilers from June to the end of August, energy savings can be achieved. ASD has had trouble with older generation grooved joint couplings when subjected to cyclic heating and cooling from seasonal shutdowns. However, due to the fact that the hydronic piping in Mountain View Elementary does not contain grooved joint couplings, leaks should not be an issue when boilers are shut down seasonally. The maintenance cost of a trained technician restarting the boilers was included in the installed cost, but no capital cost is required. This ECM was modeled with a separate AkWarm model and as a result, the item is not an additive measure in AkWarm. It is therefore, not included in the final cost savings total in the final AkWarm model in Appendix D. ECM # MES-2 – Setback Thermostat: Classrooms, Offices, Gym, and Multipurpose Room Annual Energy Savings Installed Cost SIR Payback (years) $4,279 $556 12.91 7.7 Currently there is a night setback schedule that lowers building temperatures to 65 deg F during unoccupied times. However, even greater energy savings exist by reducing the room temperature of the classrooms, offices, gymnasium, and multipurpose spaces further to 60 deg F during unoccupied times. Lowering the heat load of the building will reduce natural gas consumption. Since the school’s thermostats are already connected to the DDC system, the costs of this ECM only includes the time required to program a night setback which can be performed by maintenance personnel. The 60 deg F night setback is feasible but may require that other DDC setpoints be changed, such as the low temperature alarm. This ECM is a compilation of items 1, and 2 as modeled in AkWarm which are intended to be implemented concurrently. Details of the individual items are shown in Appendix D. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 14 AkWarm No. CIRI-ANC-CAEC-16 ECM # MES-3 – Upgrade Library Lighting Controls Annual Energy Savings Installed Cost SIR Payback (years) $555 $900 9.02 1.6 The Library lighting is provided by approximately (63) 3-lamp T8 Fluorescent light fixtures and (18) recessed can lights with two 26 watt (W) compact fluorescent lamps (CFL). These lights are controlled in multiple zones by wall switches. It is recommended that approximately six ceiling mounted occupancy sensors are installed to control these light fixtures. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 3 and 18 in Appendix D for details of individual measures. ECM # MES-4–Provide Classroom Occupancy Sensors Annual Energy Savings Installed Cost SIR Payback (years) $2,562 $4,351 2.52 1.7 The 29 classrooms in the school are primarily illuminated by two, three, and four-lamp fluorescent T8 light fixtures with electronic ballasts. It is recommended that one occupancy sensor is installed in each of the 29 classrooms to control all of the light fixtures in that room. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 4, 6, 7, 8, and 10 in Appendix D for details of individual measures. ECM # MES-5 – Upgrade Student Restroom Lighting and Provide Occupancy Sensors Annual Energy Savings Installed Cost SIR Payback (years) $481 $3,300 2.13 6.9 Lighting in the six student restrooms is provided by (16) two lamp T12 fluorescent lighting that appears to be controlled by the same lighting contactor that controls the corridor lighting. It is recommended that the light fixtures in these areas be replaced, one-for-one, with 2-lamp T8 light fixtures, and six new ceiling mounted occupancy sensors are added for control. See item 20 in Appendix D for more information. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 15 AkWarm No. CIRI-ANC-CAEC-16 ECM # MES-6 – Upgrade Corridor Lighting Annual Energy Savings Installed Cost SIR Payback (years) $2,348 $15,650 2.19 6.67 Lighting in the corridors was originally provided by fluorescent T12 light fixtures but many portions of the school have been upgraded to T8 lighting to conserve energy. The lighting levels are adequate throughout most of the corridors, however they are in excess of the IESNA suggested lighting levels in corridors 100, 200, and 300 which were upgraded with T8 lighting. Numerous nightlights with battery backed emergency ballasts are present in the corridors. All other fixtures are controlled by a contactor interfaced with the security system that shuts the corridor lights off while the security system is armed. It is suggested that the (15) single-lamp T12 and (37) two-lamp T12 light fixtures be replaced, one-for-one, with single and two-lamp T8 light fixtures respectively. It is also recommended that the lighting levels in corridors 100, 200, and 300 be reduced to IESNA recommended levels. This can be achieved by replacing ballasts in the three-lamp light fixtures with two lamp ballasts and removing the middle set of tombstones so that the fixture will only accept the outer two lamps. Additionally the number of normally switched light fixtures should be reduced by 50%, and reducing the number of light fixtures to 53. It is not recommended that the number of emergency battery backed light fixtures be reduced. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 13, 22, and 27 in Appendix D for details of individual measures. ECM # MES-7 – Upgrade Office Lighting and Controls Annual Energy Savings Installed Cost SIR Payback (years) $1,841 $16,680 1.61 9.1 The office spaces in the school are primarily illuminated by fluorescent two and three-lamp T12 light fixtures and relatively few spaces have been upgraded to three-lamp T8 lighting. All of the fluorescent light fixtures are controlled by wall switches. Additionally there is a single incandescent lamp used for task lighting in room 53. It is recommended that the (36) two-lamp, and the (52) three-lamp T12 light fixtures are replaced one-for-one by T8 light fixtures, and the single 52W incandescent desk lamp should be replaced by a CFL. One new ceiling mounted occupancy sensor should be installed in each of the 23 office spaces to control the (88) previously described fluorescent light fixtures in addition to the (12) existing three-lamp T8 light fixtures. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 14, 21, 26, and 29 in Appendix D for details of individual measures. ECM # MES-8 – Upgrade Exterior Lighting Annual Energy Savings Installed Cost SIR Payback (years) $2,759 $26,700 1.51 9.7 Approximately three photocells were observed to be inoperable during the site visit to the school leaving seven 150W HPS light fixtures on continuously. It is recommended that these photocells be replaced in addition to replacing the (24) 150W HPS building-mounted, wallpack, and canopy light fixtures with 70W LED source light fixtures. The pole mounted nine 400W HPS light fixtures should be replaced with Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 16 AkWarm No. CIRI-ANC-CAEC-16 150W LED light fixtures. Though replacing the inoperable photocells will reduce operations and maintenance costs due to extending the life of the system, these savings were not modeled in AkWarm. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 5, 9, 15, 16, 17, 19, 46, and 47 in Appendix D for details of individual measures. Note – AkWarm measures with SIRs less than one were included in this compiled annual energy savings, installed cost, SIR, and payback of this since they should be upgraded congruently. ECM # MES-9 – Upgrade Trophy Case Lighting and Controls Annual Energy Savings Installed Cost SIR Payback (years) $277 $2,850 1.41 10.3 A few trophy cases are present in the corridors and are one set is illuminated by two fluorescent single lamp 4' T12 strip lights that are controlled by a local light switch. These light fixtures should be replaced one-for-one with 4' single lamp T8 strip lights, and the wall switch should be replaced with an occupancy sensor. A second set of trophy cases is illuminated by about (12) fluorescent two-lamp, 3’ T12 light fixtures that appear to be controlled by the same contactor as the corridor lights. This bank of trophy cases is partitioned into 6' sections and each section has two 3' fixtures. Each set of two 3' fixtures should be replaced by one 4' and one 2' two lamp fluorescent T8 light fixtures. Two new occupancy sensors should also be added to control these light fixtures to switch them off while no one is present in the adjacent areas. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 12, 24, and 58 in Appendix D for details of individual measures. ECM # MES-10–Upgrade Multi-Purpose Room Lighting Annual Energy Savings Installed Cost SIR Payback (years) $765 $9,960 1.09 13.0 The MPR is illuminated by (12) high bay 400W MH light fixtures that are controlled by wall switches. Due to the long strike time associated with MH light fixtures they usually remain on the entire time that the building is occupied, and they cannot be easily controlled by occupancy sensors. The stage area integrated into the MPR has two semi-enclosed stairways leading to it from the MPR. Each stairway is illuminated by a two lamp 60W incandescent light fixture that is controlled by a wall switch. It is recommended that the MH light fixtures in the MPR be replaced one-for-one by high bay fluorescent six- lamp T5HO light fixtures controlled by new wall mounted light switches. Additionally the wall switches in the two stairways should be replaced by occupancy sensors that will automatically shut the lights off when the space is unoccupied, and that the incandescent lamps are replaced with CFL's. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 11, 28, and 42 in Appendix D for details of individual measures. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 17 AkWarm No. CIRI-ANC-CAEC-16 ECM # MES-11–Air Tightening Annual Energy Savings Installed Cost SIR Payback (years) $1,744 $15,000 1.03 8.6 By tightening the building envelope with air sealing improvements, infiltration into the building will be reduced. This in turn will reduce the heating load required by the building and reduce the amount of natural gas being burned by the boilers. While a blower door test was not completed, it is anticipated that air leakage is occurring through old weather stripping around doors, window frames, and wall and roof penetrations. Methods to decrease the infiltration into the building include: sealing around the windows and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. To achieve a viable economic benefit, up to $15,000 can be invested and still achieve an SIR ≥ 1 by reducing air leakage by 20%. See item 31 in Appendix D for more information. ECM # MES-12–Install VFDs on 5HP pumps and EC Motors on pumps less than 1HP Annual Energy Savings Installed Cost SIR Payback (years) $2,212 $35,000 0.96 15.8 It is recommended that Variable Frequency Drives (VFDs) be installed on 5 HP pumps (P-3A, 3B, 4A, and 4B) so that the pumps can modulate in order to satisfy the heating load of the hydronic system for the building. This will reduce the electricity required for pumping. The eight existing circulation pumps (P-5, 6, 7, and 8 and PMP-1,2, 3, and 4) are constant speed pumps. New, high efficiency pumps with electronically commutated (EC) motors require no DDC interface and have integral speed controls which read system demand, allowing the pump to slow down with significant electrical savings. It is recommended to replace the existing pumps with new pumps with EC motors. Though this ECM does not have an SIR above one according to the AkWarm model, it should still be considered as a viable energy conservation measure. This ECM was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in Appendix D. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 18 AkWarm No. CIRI-ANC-CAEC-16 VIII.II Portable Building Energy Conservation Measures ECM #PB-1 – Setback Thermostat Annual Energy Savings Installed Cost SIR Payback (years) $780 $1,000 9.57 1.3 Significant energy savings exist by reducing the room temperature of the portable building during unoccupied times. However, due to the fact that the portable building has perimeter electric baseboard heaters, each with individual dial thermostats, it is difficult to obtain a desired set point in the portable building. As a result, the temperature in the portable is typically much higher than required. Also, the temperature cannot be set back during unoccupied times. It is recommended that a central programmable thermostat be installed in the portable building that can turn the perimeter electric baseboards on or off to control occupied and unoccupied temperature set points. Reducing the portable temperature from 65F to 60F during unoccupied times will save $780 annually in electricity bills. See item 1 in Appendix E for more information. ECM #PB-2 – Add Insulation to Portable Skirting Annual Energy Savings Installed Cost SIR Payback (years) $264 $960 5.70 3.6 The Portable has uninsulated plywood skirting which protects the above grade floor from the weather. The skirting is estimated to have an R-value of R-3.0. Installing R-15 rigid insulation to the interior side of the portable skirting will reduce heat loss and reduce electricity consumption. See item 2 in Appendix E for more information. ECM #PB-3 – Upgrade Portable Lighting Annual Energy Savings Installed Cost SIR Payback (years) $421 $2,250 2.88 5.3 The portable is currently illuminated by (12) fluorescent four-lamp T12 light fixtures with magnetic ballasts. These fixtures should be replaced one-for-one with four-lamp T8 fluorescent light fixtures with programmable start ballasts and controlled by a ceiling mounted occupancy sensor. Additionally there is a 2'x2' two lamp 40W u-tube T12 troffer that should be replaced by a 4' two-lamp T8 light fixture and controlled by a wall mounted occupancy sensor. This description is for a compilation of several ECMs that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See items 3 and 4 in Appendix E for details of individual measures. ECM #PB-4 – Replace Exterior Doors Annual Energy Savings Installed Cost SIR Payback (years) $91 $781 2.42 8.6 The portable building has two poorly insulated (R-1.7) metal doors. It is recommended that both doors be removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. The new doors should have proper weather stripping on them to reduce air infiltration. See item 5 in Appendix E for more information. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 19 AkWarm No. CIRI-ANC-CAEC-16 ECM #PB-5 – Seal Building Envelope and Reduce Infiltration by 30% Annual Energy Savings Installed Cost SIR Payback (years) $115 $980 1.02 8.5 By tightening the portable building envelope with air sealing improvements, infiltration into the portable will be reduced. This in turn will reduce the heating load and reduce the amount of electricity being used by the electric heaters. While a blower door test was not completed, it is anticipated that air leakage is occurring around old weather stripping around doors, window frames, and wall and roof penetrations. Methods to decrease the infiltration into the portable include: sealing around the windows and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. To achieve a viable economic benefit, up to $980 can be invested and still achieve an SIR ≥ 1 by reducing air leakage by 30%. See item 6 in Appendix E for more information. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 20 AkWarm No. CIRI-ANC-CAEC-16 VIII.III Administrative Controls for Energy Conservation and Optimization While the intent of many energy conservation measures is to increase the efficiency of fuel-burning and electrical equipment, an important factor of energy consumption lies in the operational profiles which control the equipment usage. Such profiles can be managed by administrative controls and departmental leadership. They determine how and when fuel-burning and electrical equipment are used, and therefore have a greater impact on energy savings potential than simply equipment upgrades alone. Significant energy cost savings can be realized when ECMs are combined with efficient-minded operational profiles. Operational profiles may be outlined by organization policy or developed naturally or historically. These profiles include, but are not limited to: operating schedules, equipment setpoints and control strategies, maintenance schedules, and site and equipment selection. Optimization of operational profiles can be accomplished by numerous methods so long as the intent is reduction in energy-using equipment runtime. Due to the numerous methods of optimization, energy cost savings solely as a result of operational optimization are difficult to predict. Quantification, however, is easy to accomplish by metering energy usage during and/or after implementation of energy-saving operational profiles and ECMs. Shown below are some examples which have proven successful for other organizations. Optimization of site selection includes scheduling and location of events. If several buildings in a given neighborhood are all lightly used after regularly occupied hours, energy savings can be found when after- hours events are consolidated and held within the most energy efficient buildings available for use. As a result, unoccupied buildings could be shut down to the greatest extent possible to reduce energy consumption. Two operational behaviors which can be combined with equipment upgrades are operating schedules and equipment control strategies including setpoints. Occupancy and daylight sensors can be programmed to automatically shut off or dim lighting when rooms are unoccupied or sufficiently lit from the sun. Operating schedules can be optimized to run equipment only during regular or high-occupancy periods. Also, through a central control system, or with digital programmable thermostats, temperature setpoints can be reduced during low-occupancy hours to maximize savings. In addition, sporadically used equipment can be shut down during unoccupied hours to further save energy. In general, having equipment operating in areas where no occupants are present is inefficient, and presents an opportunity for energy savings. Operational profiles can also be implemented to take advantage of no- or low-cost ECMs. Examples include heating plant optimizations (boiler section cleaning, boiler flush-through cleaning) and tighter controls of equipment setbacks and shutdowns (unoccupied zones equipment shutdown, easier access to and finer control of equipment for after-hours control). In a large facility management program, implementation of these measures across many or all sites will realize dramatic savings due to the quantity of equipment involved. Changes to building operational profiles can only be realized while simultaneously addressing health, safety, user comfort, and user requirements first. It is impractical to expect users to occupy a building or implement operational behaviors which do not meet such considerations. That said, it is quite practical for management groups to implement administrative controls which reduce losses brought about by excess and sub-optimum usage. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix A Energy Benchmark Data Mountain View Elementary School Draft Energy Audit Report First Name Last Name Middle Name Phone Calvin Mundt 742‐5213 State Zip AK Monday‐ Friday Saturday Sunday Holidays 8‐4:30 Average # of Occupants During Mountain View Elementary Education ‐ K ‐ 12 59,118 Facility Address Building Type Mixed Community Population Facility City REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner MOA Building Name/ Identifier Building Usage Building Square Footage Facility Owned By Date Municipal Government/Subdivision 07/22/11 4005 Mcphee Ave Anchorage Primary Operating Hours Contact Person City Year Built 1958 Anchorage Mailing Address Facility Zip 261,500 99517 Email mundt_calvin@asdk12.org Renovations Date 1970 - 5685 SF Classrooms 1983 - 16643 Classroms, MPR Total = 58158 SF PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton Other energy sources? 1958 - 35830 SF Original 1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for the energy source. 2. Provide utilities bills for the most recent two‐year period for each energy source you use. Details Coffman Engineers, Inc.AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary School Draft Energy Audit Report Mountain View Elementary Buiding Size Input (sf) =59,118 2009 Natural Gas Consumption (Therms)51,285.00 2009 Natural Gas Cost ($)51,420 2009 Electric Consumption (kWh)522,208 2009 Electric Cost ($)64,670 2009 Total Energy Use (kBtu)6,910,796 2009 Total Energy Cost ($)116,090 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 86.8 2009 Electricity (kBtu/sf)30.1 2009 Energy Utilization Index (kBtu/sf)116.9 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf)0.87 2009 Electric Cost Index ($/sf)1.09 2009 Energy Cost Index ($/sf)1.96 2010 Natural Gas Consumption (Therms)47,139.00 2010 Natural Gas Cost ($)40,977 2010 Electric Consumption (kWh)531,090 2010 Electric Cost ($)68,216 2010 Total Energy Use (kBtu)6,526,510 2010 Total Energy Cost ($)109,193 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf)79.7 2010 Electricity (kBtu/sf)30.7 2010 Energy Utilization Index (kBtu/sf)110.4 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf)0.69 2010 Electric Cost Index ($/sf)1.15 20010 Energy Cost Index ($/sf)1.85 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Coffman Engineers, Inc.AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary School Draft Energy Audit Report Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc.AkWarm No. CIRI-ANC-CAEC-16 Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary SchoolDraft Energy Audit ReportMountain View ElementaryNatural GasBtus/CCF =100,000Provider Meter # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($)Enstar NGC139756 Jan-09 01/12/09 02/11/09308,5488,548$8,632$1.01Enstar NGC139756 Feb-09 02/11/09 03/11/09286,4436,443$6,520$1.01Enstar NGC139756 Mar-09 03/11/09 04/13/09335,6625,662$5,739$1.01Enstar NGC139756 Apr-09 04/13/09 05/11/09284,2644,264$4,337$1.02Enstar NGC139756 May-09 05/11/09 06/11/09312,8852,885$2,958$1.03Enstar NGC139756 Jun-09 06/11/09 07/13/09321,3231,323$1,387$1.05Enstar NGC139756 Jul-09 07/13/09 08/12/09301,2311,231$1,299$1.06Enstar NGC139756 Aug-09 08/12/09 09/11/09302,0752,075$2,148$1.04Enstar NGC139756 Sep-09 09/11/09 10/12/09312,9312,931$3,003$1.02Enstar NGC139756 Oct-09 10/12/09 11/10/09293,9963,996$4,075$1.02Enstar NGC139756 Nov-09 11/10/09 12/09/09295,6435,643$5,727$1.01Enstar NGC139756 Dec-09 12/09/09 01/12/10346,2846,284$5,595$0.89Enstar NGC139756 Jan-10 01/12/10 02/10/10296,1816,181$5,178$0.84Enstar NGC139756 Feb-10 02/10/10 03/11/10294,6784,678$3,932$0.84Enstar NGC139756Mar-1003/11/1004/13/10334,3454,345$3,681$0.85Enstar NGC139756Mar-1003/11/1004/13/10334,3454,345$3,681$0.85Enstar NGC139756 Apr-10 04/13/10 05/11/10 28 3,607 3,607$3,079$0.85Enstar NGC139756 May-10 05/11/10 06/09/10292,5292,529$2,185$0.86Enstar NGC139756 Jun-10 06/09/10 07/12/10331,6271,627$1,422$0.87Enstar NGC139756 Jul-10 07/12/10 08/11/10301,5891,589$1,545$0.97Enstar NGC139756 Aug-10 08/11/10 09/10/10301,8931,893$1,888$1.00Enstar NGC139756 Sep-10 09/10/10 10/12/10322,6032,603$2,428$0.93Enstar NGC139756 Oct-10 10/12/10 11/09/10284,0434,043$3,615$0.89Enstar NGC139756 Nov-10 11/09/10 12/09/10305,8485,848$5,047$0.86Enstar NGC139756 Dec-10 12/09/10 01/12/11348,1968,196$6,977$0.85Jan - 09 to Dec - 09 total:51,28551,2850.00$51,420$0Jan - 10 to Dec - 10 total:47,13947,1390.00$40,977$0$1.01$0.89Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Coffman Engineers, Inc.AkWarm No. CIRI#ANC#CAEC#16Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary SchoolDraft Energy Audit Report$4,000 $5,000 $6,000 $7,000 $8,000 $9,000 $10,000 4,0005,0006,0007,0008,0009,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Mt. View Elem. - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($)$0 $1,000 $2,000 $3,000 01,0002,0003,000Natural Gas Consumption (Therms)Date (Mon - Yr)Coffman Engineers, Inc.AkWarm No. CIRI#ANC#CAEC#16Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary SchoolDraft Energy Audit ReportMountain View ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)ML&P 21032986 Jan-09 1/6/2009 2/6/20093159,4712,030170 $5,508$0.090ML&P 21032986 Feb-09 2/6/2009 3/6/20092849,3401,684170 $9,228$0.190ML&P 21032986 Mar-09 3/6/2009 4/7/20093250,9841,740159 $6,731$0.130ML&P 21032986 Apr-09 4/7/2009 5/7/20093049,4371,687159 $5,492$0.110ML&P 21032986 May-09 5/7/2009 6/5/20092941,6311,421153 $4,927$0.120ML&P 21032986 Jun-09 6/5/2009 7/8/20093318,323625141 $2,943$0.160ML&P 21032986 Jul-09 7/8/2009 8/7/20093017,78260771 $3,039$0.170ML&P 21032986 Aug-09 8/7/2009 9/8/20093236,0971,232143 $4,429$0.120ML&P 21032986 Sep-09 9/8/2009 10/7/20092946,3061,580149 $5,337$0.120ML&P 21032986 Oct-09 10/7/2009 11/6/20093051,4821,757155 $5,867$0.110ML&P 21032986 Nov-09 11/6/2009 12/4/20092852,6831,798155 $6,003$0.110ML&P 21032986 Dec-09 12/4/2009 1/6/20103348,6721,661157 $5,166$0.110ML&P 21032986 Jan-10 1/6/2010 2/16/20104152,7001,799158 $5,048$0.100ML&P 21032986 Feb-10 2/16/2010 3/8/20102046,9691,603159 $5,068$0.110ML&P21032986Mar-103/8/20104/7/20103048,5251,656159$9,245$0.190ML&P21032986Mar-103/8/20104/7/20103048,5251,656159$9,245$0.190ML&P 21032986 Apr-10 4/7/2010 5/6/20102949,9031,703147 $7,037$0.140ML&P 21032986 May-10 5/6/2010 6/18/20104334,6911,184147 $4,464$0.130ML&P 21032986 Jun-10 6/18/2010 7/7/20101923,964818147 $3,848$0.160ML&P 21032986 Jul-10 7/7/2010 8/6/20103024,03682078 $3,750$0.160ML&P 21032986 Aug-10 8/6/2010 9/7/20103239,1511,336145 $4,757$0.120ML&P 21032986 Sep-10 9/7/2010 10/6/20102947,2261,612151 $5,635$0.120ML&P 21032986 Oct-10 10/6/2010 11/4/20102953,6251,830154 $6,323$0.120ML&P 21032986 Nov-10 11/4/2010 12/6/20103253,2871,819161 $6,135$0.120ML&P 21032986 Dec-10 12/6/2010 1/5/20113057,0131,946161 $6,906$0.120Jan - 09 to Dec - 09 total:522,20817,8231782$64,6700Jan - 10 to Dec - 10 total:531,09018,1261766$68,2160$0.13$0.13Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Coffman Engineers, Inc.AkWarm No. CIRI#ANC#CAEC#16Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary SchoolDraft Energy Audit Report$4,000$5,000$6,000$7,000$8,000$9,000$10,00030,00040,00050,00060,00070,000Electric Cost ($)Electric Consumption (kWh)Mountain View Elementary - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$1,000$2,000$3,000010,00020,000Electric Consumption (kWh)Date (Mon - Yr)Coffman Engineers, Inc.AkWarm No. CIRI#ANC#CAEC#16Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix B AkWarm Commercial Reports Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Elementary School ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 2/16/2012 10:19 AM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Mountain View ES Auditor Company: Coffman Engineers, Inc. Address: 4005 Mcphee Ave Auditor Name: Walter Heins PE, CCP, CxA, CEA City: Anchorage Auditor Address: 800 F Street Anchorage, AK 99501 Client Name: Calvin Mundt Client Address: Auditor Phone: (907) 276-6664 Auditor FAX: Client Phone: (907) 742-5213 Auditor Comment: Client FAX: Design Data Building Area: 58,158 square feet Design Heating Load: Design Loss at Space: 1,413,555 Btu/hour with Distribution Losses: 1,461,914 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 2,228,527 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 380 people Design Indoor Temperature: 68 deg F (building average) Actual City: Anchorage Design Outdoor Temperature: -18 deg F Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F-days Utility Information Electric Utility: Anchorage ML&P - Commercial - Sm Natural Gas Provider: Enstar Natural Gas - Commercial - Sm Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.940/ccf Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Elementary School Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Other Electrical Cooking Clothes Drying Vent Fans Service Fees Total Cost Existing Building $55,304 $0 $3,226 $32,056 $4,770 $0 $0 $13,204 $0 $108,560 With Proposed Retrofits $42,104 $0 $3,226 $19,955 $4,770 $0 $0 $13,204 $0 $83,259 SAVINGS $13,200 $0 $0 $12,101 $0 $0 $0 $0 $0 $25,301 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Elementary School Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Elementary School Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Natural Gas (Right) Consumption (Orange). Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange). Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Monthly Modeled Consumption (Blue compared to Actual Natural Gas Consumption (Orange). Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Portable Buildings ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 2/16/2012 10:32 AM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Mountain View ES - Portable Building Auditor Company: Coffman Engineers, Inc. Address: 4005 Mcphee Ave Auditor Name: Walter Heins, PE, CCP, CxA, CEA City: Anchorage Auditor Address: 800 F Street Anchorage, AK 99501 Anchorage, AK 99501 Client Name: Calvin Mundt Client Address: Auditor Phone: (907) 276-6664 Auditor FAX: (907) 276-5042 Client Phone: (907) 742-5213 Auditor Comment: Client FAX: Design Data Building Area: 960 square feet Design Heating Load: Design Loss at Space: 27,972 Btu/hour with Distribution Losses: 27,972 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 42,641 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 10 people Design Indoor Temperature: 70 deg F (building average) Actual City: Anchorage Design Outdoor Temperature: -18 deg F Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F-days Utility Information Electric Utility: Anchorage ML&P - Commercial - Sm Natural Gas Provider: Enstar Natural Gas - Commercial - Sm Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Portable Buildings Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building $4,240 $0 $0 $726 $0 $65 $0 $0 $0 $0 $5,031 With Proposed Retrofits $1,621 $0 $0 $305 $0 $65 $0 $0 $0 $0 $1,990 SAVINGS $2,619 $0 $0 $421 $0 $0 $0 $0 $0 $0 $3,041 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Portable Buildings Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix C Major Equipment List Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) B-1 BOILER RM BUILDING HEATING WEIL-MCLAIN1388 CAST IRON GAS FIRED 2840 MBH ≈ 80% 30 ≈ 17 B-2 BOILER RM BUILDING HEATING WEIL-MCLAIN 1388 CAST IRON GAS FIRED 2840 MBH ≈ 80% 30 ≈ 17 B-3 MECH RM BUILDING HEATING BURNHAM PF-505 CAST IRON GAS FIRED 966 MBH ≈ 81% 30 ≈ 2 B-4 MECH RM BUILDING HEATING BURNHAM PF-505 CAST IRON GAS FIRED 966 MBH ≈ 81% 30 ≈ 2 WH-1 BOILER RM DOMESTIC HOT WATER AO SMITH BTP-140-540 GAS 140 GAL ≈ 75% 15 ≈ 2 WH-2 MECH RM DOMESTIC HOT WATER AO SMITH BT-100 GAS 100 GAL ≈ 80% 15 0 P-1 BOILER RM HEATING WATER CIRC ARMSTRONG 4380 INLINE 190GPM 23' ≈ 84% 2HP 10 0 P-2 BOILER RM HEATING WATER CIRC ARMSTRONG 4380 INLINE 190GPM 23' ≈ 84% 2HP 10 0 P-3A BOILER RM HEATING WATER CIRC ARMSTRONG 4030 BASE MOUNTED 223GPM 54' ≈ 86% 5HP 20 7 P-3B BOILER RM HEATING WATER CIRC ARMSTRONG 4030 BASE MOUNTED 223GPM 54' ≈ 86% 5HP 20 7 P-4A BOILER RM HEATING GLYCOL CIRC ARMSTRONG 4030 BASE MOUNTED 175GPM 58' ≈ 86% 5HP 20 7 P-4B BOILER RM HEATING GLYCOL CIRC ARMSTRONG 4030 BASE MOUNTED 175GPM 58' ≈ 86% 5HP 20 7 P-5 BOILER RM BOILER RECIRC ARMSTRONG INLINE 10GPM 10’ ≈ 86% 1/6HP 10 0 P-6 BOILER RM BOILER RECIRC ARMSTRONG INLINE 10GPM 10’ ≈ 86% 1/6HP 10 0 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) P-7 BOILER RM HEATING WATER CIRC ARMSTRONG 4380 INLINE 100GPM 12’ ≈ 86% 1/2HP 10 0 P-8 BOILER RM HEATING WATER CIRC ARMSTRONG INLINE 100GPM 12’ ≈ 86% 3/4HP 10 0 PMP-1 MECH RM HEATING GLYCOL CIRC BELL & GOSSETT INLINE 50GPM 26’ ≈ 85% 3/4HP 10 0 PMP-2 MECH RM HEATING GLYCOL CIRC BELL & GOSSETT INLINE 50GPM 26’ ≈ 85% 3/4HP 10 0 PMP-3 MECH RM HEATING COIL AHU-1 BELL & GOSSETT INLINE 14.2GPM 9’ ≈ 85% 1/6HP 10 0 PMP-4 MECH RM HEATING COIL AHU-2 BELL & GOSSETT INLINE 15GPM 8.5’ ≈ 85% 1/6HP 10 0 PMP-5 MECH RM DOMESTIC HOT WATER RECIRC GRUNDFOS UPS-15-425T INLINE 5GPM 7.9’ ≈ 85% 1/12HP 10 0 P-10 BOILER RM DOMESTIC HOT WATER RECIRC GRUNDFOS UP-25-64SF INLINE 5GPM ≈ 85% 85W 10 0 F-1 BOILER RM COMBUSTION AIR GREENHECK BCF-208-7 CENTRIFUGAL 1880CFM 0.75" 3/4HP 25 12 RF-1 ROOF RELIEF AIR ACME PV365M CENTRIFUGAL 11200CFM 0.5" 3HP w/VFD 25 19 RF-2 ROOF RELIEF AIR ACME PV365L CENTRIFUGAL 8000CFM 0.5" 2HP w/VFD 25 19 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) RF-1A MECH RM RETURN AIR TWIN CITY FAN & BLOWER CO PROPELLER 4500CFM 0.6” 2HP 15 0 VF-1 FAN RM SUPPLY AIR COOL GN-862 CENTRIFUGAL 800CFM 0.6" 240W 25 19 EF-1 RESTROOM GIRLS RESTROOM EXHAUST CARNES VEDB-06-825 PROPELLER 450CFM 0.25" 1/12HP 15 0 EF-2 RESTROOM BOYS RESTROOM EXHAUST CARNES VEDB-06-825 PROPELLER 450CFM 0.25” 1/12HP 15 0 EF-3 RESTROOM TOILET EXHAUST CARNES VEDB-06-825 PROPELLER 130CFM 0.25” 1/20HP 15 0 EF-4 ROOF MECH RM EXHAUST CARNES VEBA-20 PROPELLER 3600CFM 0.5” 1HP 15 0 EF-4A MPR FAN RM MPR EXHAUST ABCO 222 PROPELLER 4200CFM 1HP 15 0 EF-5 ROOF MECH RM EXHAUST CARNES VEBA-20 PROPELLER 3600CFM 0.5” 1HP 15 0 EF-6 RESTROOM TOILET EXHAUST CARNES VEDB-6-825 PROPELLER 130CFM 0.25” 1/20HP 15 0 AHU-1 (2005) FAN RM NW CLASSROOMS HAAKON 5W0602A AIR HANDLER 4000CFM 1.5” 3HP 25 19 AHU-2 (2005) FAN RM SW CLASSROOMS HAAKON 5WH0901A AIR HANDLER 7200CFM 1.5” 5HP 25 19 AHU-7 (2005) FAN RM SE CLASSROOMS HAAKON 5WQ0801A AIR HANDLER 4800CFM 1.5” 3HP 25 19 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) AHU-8 (2005) FAN RM NE CLASSROOMS HAAKON 5WQ0602A AIR HANDLER 3600CFM 1.5” 3HP 25 19 AHU-1 (1983) MECH RM CLASSROOMS TRANE CLIMATE CHANGER 17B AIR HANDLER 8260CFM 2.5” 7.5HP 25 0 AHU-2 (1983) MECH RM GYM TRANE CLIMATE CHANGER 8A AIR HANDLER 4500CFM 1.75” 3HP 25 0 AHU-5 (1956) FAN RM MPR ABCO 215 AIR HANDLER 5500CFM 0.87” 2HP 25 0 AHU FAN RM LIBRARY - - AIR HANDLER ≈5HP 25 0 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix D Energy Conservation Measures Mountain View Elementary School Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Setback Thermostat: Classroom / Office Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classroom / Office space. $4,042 $462 112.97 0.1 2 Setback Thermostat: Gymnasium / Multipurpose Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gymnasium / Multipurpose space. $237 $94 32.50 0.4 3 Lighting: Library Add new Occupancy Sensor $475 $450 15.44 0.9 4 Lighting: Classroom Add new Occupancy Sensor $43 $46 13.58 1.1 5 Lighting: Exterior Improve Manual Switching $411 $600 10.02 1.5 6 Lighting: Classroom Add new Occupancy Sensor $1,770 $2,904 8.90 1.6 7 Lighting: Classroom Add new Occupancy Sensor $587 $1,056 8.13 1.8 8 Lighting: Classroom Add new Occupancy Sensor $157 $333 6.91 2.1 9 Lighting: Exterior Replace with 3 LED 72W Module StdElectronic $329 $900 5.35 2.7 10 Lighting: Classroom Add new Occupancy Sensor $4 $12 5.13 2.9 11 Lighting: Multi Purpose Room Replace with 2 FLUOR (2) CFL, Spiral 23 W $41 $60 4.27 1.4 12 Lighting: Trophy Cases Add new Occupancy Sensor $80 $300 3.91 3.7 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 13 Lighting: Corridors Replace with 53 FLUOR (2) T8 4' F32T8 32W Standard (2) Program StdElectronic $1,496 $7,850 2.78 5.2 14 Lighting: Offices Add new Occupancy Sensor $77 $414 2.70 5.4 15 Lighting: Exterior Replace with 12 LED 72W Module StdElectronic $659 $3,600 2.67 5.5 16 Lighting: Exterior Replace with 5 LED 72W Module StdElectronic $274 $1,500 2.67 5.5 17 Lighting: Exterior Replace with 4 LED 72W Module StdElectronic $220 $1,200 2.67 5.5 18 Lighting: Library Add new Occupancy Sensor $80 $450 2.60 5.6 19 Lighting: Exterior Improve Manual Switching $144 $900 2.34 6.3 20 Lighting: Student Restrooms Replace with 16 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $481 $3,300 2.13 6.9 21 Lighting: Offices Replace with 52 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $1,227 $9,594 1.87 7.8 22 Lighting: Corridors Replace with 37 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $679 $5,550 1.79 8.2 23 Lighting: Classroom Toilet Add new Occupancy Sensor $33 $269 1.79 8.2 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 24 Lighting: Trophy Cases Replace with 12 LED 12W Module StdElectronic $173 $1,800 1.40 10.4 25 Lighting: Classroom Toilet Add new Occupancy Sensor $13 $135 1.35 10.8 26 Lighting: Offices Replace with 36 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $532 $6,642 1.17 12.5 27 Lighting: Corridors Replace with 15 FLUOR T8 4' F32T8 32W Standard Program StdElectronic $173 $2,250 1.12 13 28 Lighting: Multi Purpose Room Replace with 12 FLUOR (6) T5 45.2" F54W/T5 HO Standard (2) StdElectronic and Add new Occupancy Sensor $711 $9,600 1.08 13.5 29 Lighting: Offices Replace with FLUOR CFL, Spiral 23 W $5 $30 1.05 5.9 30 Lighting: Mechanical, Storage, and Custodial Replace with FLUOR (2) CFL, Spiral 23 W and Add new Occupancy Sensor $8 $100 1.04 12 31 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,744 $15,000 1.03 8.6 32 Lighting: Faculty Toilets Replace with FLUOR CFL, Spiral 23 W $4 $30 0.89 7 33 Above-Grade Wall: Orig. Const. Walls Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $2,866 $76,786 0.87 26.8 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 34 Above-Grade Wall: New Const. 4 Rm Addition Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $1,124 $30,242 0.86 26.9 35 Lighting: Classroom Toilet Replace with 11 FLUOR CFL, Spiral 23 W and Add new Occupancy Sensor $73 $1,070 0.84 14.6 36 Lighting: Mechanical, Storage, and Custodial Add new Occupancy Sensor $4 $70 0.82 17.8 37 Window/Skylight: Orig. Const. - East Windows Install Lexan magnetic storm window on interior $24 $536 0.75 22.2 38 Window/Skylight: Orig. Const. - North Windows Install Lexan magnetic storm window on interior $35 $774 0.75 22.2 39 Window/Skylight: Orig. Const. - West Windows Install Lexan magnetic storm window on interior $18 $410 0.75 22.2 40 Lighting: Classroom Toilet Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $22 $435 0.73 20.1 41 Window/Skylight: Orig. Const. - South Windows Install Lexan magnetic storm window on interior $1,006 $25,398 0.66 25.2 42 Lighting: Multi Purpose Room Add new Occupancy Sensor $13 $300 0.63 23.3 43 Exterior Door: Orig. Const. - East Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $44 $1,640 0.62 37.4 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 44 Exterior Door: Orig. Const. - South Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $44 $1,640 0.62 37.4 45 Exterior Door: Orig. Const. - West Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $44 $1,640 0.62 37.4 46 Lighting: Exterior Replace with 2 LED (2) 150W Module (2) StdElectronic $321 $8,000 0.59 24.9 47 Lighting: Exterior Replace with 5 LED 150W Module StdElectronic $401 $10,000 0.59 24.9 48 Exterior Door: New Const. - North Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $9 $410 0.53 44.1 49 Exterior Door: New Const. - East Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $37 $1,640 0.52 44.3 50 Exterior Door: Orig. Const. - North Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $19 $820 0.52 44.3 51 Exterior Door: New Const. - South Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $9 $410 0.53 44.2 52 Exterior Door: New Const. - West Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $9 $410 0.52 44.4 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 53 Lighting: Mechanical, Storage, and Custodial Replace with 11 FLUOR CFL, Spiral 23 W and Add new Occupancy Sensor $46 $1,095 0.52 23.8 54 Window/Skylight: New Const. - East Windows Install Lexan magnetic storm window on interior $14 $451 0.51 32.5 55 Window/Skylight: New Const. - West Windows Install Lexan magnetic storm window on interior $14 $451 0.51 32.5 56 Window/Skylight: New Const. - North Windows Install Lexan magnetic storm window on interior $18 $577 0.51 32.5 57 Lighting: Kitchen Replace with 17 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $88 $2,550 0.50 29 58 Lighting: Trophy Cases Replace with 2 LED 12W Module StdElectronic and Add new Occupancy Sensor $24 $750 0.47 30.9 59 Lighting: Mechanical, Storage, and Custodial Replace with 28 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $164 $6,146 0.39 37.6 60 Lighting: Faculty Toilets Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $31 $1,200 0.38 38.2 61 HVAC And DHW Replace Boilers B-4 with a high efficiency condensing boiler. $1,171 $54,130 0.36 46.2 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 62 Lighting: Classroom Toilet Add new Occupancy Sensor $15 $672 0.32 45.3 63 Lighting: Mechanical, Storage, and Custodial Replace with FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $3 $150 0.32 46 64 Lighting: Gym Storage Add new Occupancy Sensor $4 $225 0.24 60.5 65 Cathedral Ceiling: Flat Roof Install R-5 rigid board insulation. No cost included for covering insulation. $622 $82,488 0.18 132.6 66 Above-Grade Wall: Orig. MPR Wall Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $49 $8,397 0.14 170.3 67 Lighting: Faculty Toilets Add new Occupancy Sensor $1 $150 0.13 112.3 68 Lighting: Gym Storage Replace with 5 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $7 $975 0.10 141.5 69 Lighting: Mechanical, Storage, and Custodial Replace with 2 FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic -$3 $400 -0.12 -119.6 TOTAL $25,301 $400,867 0.99 15.8 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS 1. Building Envelope Insulation Rank Location Existing Type/R-Value Recommendation Type/R- Value Installed Cost Annual Energy Savings 33 Above-Grade Wall: Orig. Const. Walls Wall Type: Single Stud Siding Configuration: Just Siding Insul. Sheathing: None Structural Wall: 2 x 6, 16 inches on center None Window and door headers: Insulated Modeled R-Value: 3.5 Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $76,786 $2,866 34 Above-Grade Wall: New Const. 4 Rm Addition Wall Type: Single Stud Siding Configuration: Just Siding Insul. Sheathing: None Structural Wall: 2 x 6, 16 inches on center None Window and door headers: Insulated Modeled R-Value: 3.5 Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $30,242 $1,124 65 Cathedral Ceiling: Flat Roof Framing Type: I-Beam (TJI) Framing Spacing: 24 inches Insulated Sheathing: None Bottom Insulation Layer: R-30 Batt:FG or RW, 9.5 inches Top Insulation Layer: None Modeled R-Value: 32.6 Install R-5 rigid board insulation. No cost included for covering insulation. $82,488 $622 66 Above-Grade Wall: Orig. MPR Wall Wall Type: Other Wall Construction: 2x6" Metal Stud Wall, R-19, 16" o.c.+ 1"rigid Modeled R-Value: 14.1 Add R-10 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $8,397 $49 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 43 Exterior Door: Orig. Const. - East Doors Door Type: Entrance, Metal, fiberglass core, half lite Modeled R-Value: 2.2 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $1,640 $44 44 Exterior Door: Orig. Const. - South Doors Door Type: Entrance, Metal, fiberglass core, half lite Modeled R-Value: 2.2 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $1,640 $44 45 Exterior Door: Orig. Const. - West Doors Door Type: Entrance, Metal, fiberglass core, half lite Modeled R-Value: 2.2 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $1,640 $44 48 Exterior Door: New Const. - North Doors Door Type: Entrance, Metal, polyurethane core, metal edge Modeled R-Value: 2.5 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $410 $9 49 Exterior Door: New Const. - East Doors Door Type: Entrance, Metal, polyurethane core, metal edge Modeled R-Value: 2.5 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $1,640 $37 50 Exterior Door: Orig. Const. - North Doors Door Type: Entrance, Metal, polyurethane core, metal edge Modeled R-Value: 2.5 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $820 $19 51 Exterior Door: New Const. - South Doors Door Type: Entrance, Metal, polyurethane core, metal edge Modeled R-Value: 2.5 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $410 $9 52 Exterior Door: New Const. - West Doors Door Type: Entrance, Metal, polyurethane core, metal edge Modeled R-Value: 2.5 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $410 $9 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 37 Window/Skylight: Orig. Const. - East Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $536 $24 38 Window/Skylight: Orig. Const. - North Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $774 $35 39 Window/Skylight: Orig. Const. - West Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $410 $18 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 41 Window/Skylight: Orig. Const. - South Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $25,398 $1,006 54 Window/Skylight: New Const. - East Windows Glass: Double, glass Frame: Aluminum w/ Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.62 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $451 $14 55 Window/Skylight: New Const. - West Windows Glass: Double, glass Frame: Aluminum w/ Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.62 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $451 $14 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 56 Window/Skylight: New Const. - North Windows Glass: Double, glass Frame: Aluminum w/ Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.62 Solar Heat Gain Coefficient including Window Coverings: 0.46 Install Lexan magnetic storm window on interior $577 $18 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 31 Air Tightness estimated as: 1.00 cfm/ft2 of above-grade shell area at 75 Pascals Perform air sealing to reduce air leakage by 20%. $15,000 $1,744 2. Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 61 Replace Boilers B-4 with a high efficiency condensing boiler. $54,130 $1,171 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Classroom / Office Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classroom / Office space. $462 $4,042 2 Gymnasium / Multipurpose Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gymnasium / Multipurpose space. $94 $237 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 3 Library 63 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $450 $475 4 Classroom 4 FLUOR (3) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Add new Occupancy Sensor $46 $43 5 Exterior 4 HPS 150 Watt Magnetic with Manual Switching Improve Manual Switching $600 $411 6 Classroom 253 FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching, Multi-Level Switch Add new Occupancy Sensor $2,904 $1,770 7 Classroom 92 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $1,056 $587 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 8 Classroom 29 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching, Multi-Level Switch Add new Occupancy Sensor $333 $157 9 Exterior 3 HPS 150 Watt Magnetic with Manual Switching Replace with 3 LED 72W Module StdElectronic $900 $329 10 Classroom FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor $12 $4 11 Multi Purpose Room 2 INCAN (2) A Lamp, Std 60W with Manual Switching Replace with 2 FLUOR (2) CFL, Spiral 23 W $60 $41 12 Trophy Cases 12 FLUOR T12 4' F40T12 40W Standard Magnetic with Manual Switching Add new Occupancy Sensor $300 $80 13 Corridors 53 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Replace with 53 FLUOR (2) T8 4' F32T8 32W Standard (2) Program StdElectronic $7,850 $1,496 14 Offices 12 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $414 $77 15 Exterior 12 HPS 150 Watt Magnetic with Manual Switching Replace with 12 LED 72W Module StdElectronic $3,600 $659 16 Exterior 5 HPS 150 Watt Magnetic with Manual Switching Replace with 5 LED 72W Module StdElectronic $1,500 $274 17 Exterior 4 HPS 150 Watt Magnetic with Manual Switching Replace with 4 LED 72W Module StdElectronic $1,200 $220 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 18 Library 18 FLUOR (2) CFL, Plug-in 26W Quad Tube StdElectronic with Manual Switching Add new Occupancy Sensor $450 $80 19 Exterior 3 HPS 150 Watt Magnetic with Manual Switching Improve Manual Switching $900 $144 20 Student Restrooms 16 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 16 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $3,300 $481 21 Offices 52 FLUOR (3) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 52 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $9,594 $1,227 22 Corridors 37 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 37 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $5,550 $679 23 Classroom Toilet 4 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $269 $33 24 Trophy Cases 12 FLUOR T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 12 LED 12W Module StdElectronic $1,800 $173 25 Classroom Toilet 2 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $135 $13 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 26 Offices 36 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 36 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $6,642 $532 27 Corridors 15 FLUOR T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 15 FLUOR T8 4' F32T8 32W Standard Program StdElectronic $2,250 $173 28 Multi Purpose Room 12 MH 400 Watt Magnetic with Manual Switching Replace with 12 FLUOR (6) T5 45.2" F54W/T5 HO Standard (2) StdElectronic and Add new Occupancy Sensor $9,600 $711 29 Offices INCAN A Lamp, Std 60W with Manual Switching Replace with FLUOR CFL, Spiral 23 W $30 $5 30 Mechanical, Storage, and Custodial INCAN (2) A Lamp, Std 60W with Manual Switching Replace with FLUOR (2) CFL, Spiral 23 W and Add new Occupancy Sensor $100 $8 32 Faculty Toilets INCAN A Lamp, Std 60W with Manual Switching Replace with FLUOR CFL, Spiral 23 W $30 $4 35 Classroom Toilet 11 INCAN A Lamp, Std 60W with Manual Switching Replace with 11 FLUOR CFL, Spiral 23 W and Add new Occupancy Sensor $1,070 $73 36 Mechanical, Storage, and Custodial FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $70 $4 40 Classroom Toilet 2 FLUOR (2) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $435 $22 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 42 Multi Purpose Room 2 INCAN (2) A Lamp, Std 60W with Manual Switching Add new Occupancy Sensor $300 $13 46 Exterior 2 HPS (2) 400 Watt (2) Magnetic with Manual Switching Replace with 2 LED (2) 150W Module (2) StdElectronic $8,000 $321 47 Exterior 5 HPS 400 Watt Magnetic with Manual Switching Replace with 5 LED 150W Module StdElectronic $10,000 $401 53 Mechanical, Storage, and Custodial 11 INCAN A Lamp, Std 60W with Manual Switching Replace with 11 FLUOR CFL, Spiral 23 W and Add new Occupancy Sensor $1,095 $46 57 Kitchen 17 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 17 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $2,550 $88 58 Trophy Cases 2 FLUOR T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 2 LED 12W Module StdElectronic and Add new Occupancy Sensor $750 $24 59 Mechanical, Storage, and Custodial 28 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 28 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $6,146 $164 60 Faculty Toilets 4 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $1,200 $31 62 Classroom Toilet 10 FLUOR Circline 8.25" FC8T9 22W StdElectronic with Manual Switching Add new Occupancy Sensor $672 $15 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 63 Mechanical, Storage, and Custodial FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $150 $3 64 Gym Storage 4 FLUOR (3) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $225 $4 67 Faculty Toilets INCAN A Lamp, Std 60W with Manual Switching Add new Occupancy Sensor $150 $1 68 Gym Storage 5 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 5 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor $975 $7 69 Mechanical, Storage, and Custodial 2 FLUOR (2) T12 8' F96T12/HO 110W Standard Magnetic with Manual Switching Replace with 2 FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic $400 -$3 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix E Energy Conservation Measures Mountain View Portable Building Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Setback Thermostat: Portable Building Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. $1,138 $1,000 13.97 0.9 2 Below- (part or all) Grade Wall: Portable Building Skirting Install R-15 rigid foam board to interior or exterior side of wall. Does not include cost of coverings. $782 $1,624 9.97 2.1 3 Lighting: Portable lighting Replace with FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $74 $300 3.80 4.1 4 Lighting: Portable Lighting Replace with 12 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $347 $1,950 2.74 5.6 5 Exterior Door: Portable Building - Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $90 $781 2.38 8.7 6 Air Tightening Perform air sealing to reduce air leakage by 30%. $112 $980 1.00 8.7 7 Above-Grade Wall: Portable Building - 2x4 Stud Wall Install R-20 rigid foam board to exterior and cover with T1-11 siding or equivalent. $475 $11,597 0.85 24.4 8 Window/Skylight: Portable Building - Double Pane Windows Replace existing window with U-0.35 wood window $21 $1,635 0.20 76.1 TOTAL $3,041 $19,867 2.5 6.5 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS 2. Building Envelope Insulation Rank Location Existing Type/R-Value Recommendation Type/R- Value Installed Cost Annual Energy Savings 2 Below- (part or all) Grade Wall: Portable Building Skirting Wall Type: All Weather Wood Insul. Sheathing: None Framed Wall: 2 x 4, 16" on center None Modeled R-Value: 3 Install R-15 rigid foam board to interior or exterior side of wall. Does not include cost of coverings. $1,624 $782 7 Above-Grade Wall: Portable Building - 2x4 Stud Wall Wall Type: Single Stud Siding Configuration: Just Siding Insul. Sheathing: None Structural Wall: 2 x 4, 16 inches on center R-13 Batt:FG or RW, 3.5 inches Window and door headers: Not Insulated Modeled R-Value: 11.4 Install R-20 rigid foam board to exterior and cover with T1-11 siding or equivalent. $11,597 $475 Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 5 Exterior Door: Portable Building - Doors Door Type: Metal - fiberglass or mineral wool Modeled R-Value: 1.7 Remove existing door and install standard pre-hung U- 0.16 insulated door, including hardware. $781 $90 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 8 Window/Skylight: Portable Building - Double Pane Windows Glass: Double, glass Frame: Wood\Vinyl Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.51 Solar Heat Gain Coefficient including Window Coverings: 0.46 Replace existing window with U-0.35 wood window $1,635 $21 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 6 Air Tightness estimated as: 818 cfm at 50 Pascals Perform air sealing to reduce air leakage by 30%. $980 $112 2. Mechanical Equipment Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Portable Building Existing Unoccupied Heating Setpoint: 70.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. $1,000 $1,138 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 3 Portable lighting FLUOR (2) T12 F40T12 40W U-Tube Standard StdElectronic with Manual Switching Replace with FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $300 $74 4 Portable Lighting 12 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 12 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $1,950 $347 Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix F Site Survey Photos Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 1. School Main Entrance 2. Boiler Room Access 3. Boiler B-4 in Mechanical Room 4. AHU-1 in Mechanical Room Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 5. Boiler B-2 in Boiler Room 6. Abandoned-in-place Rooftop AHU 7. Heating Water Circulation Pumps P-3A and P-3B in Boiler Room 8. Domestic Hot Water Heater, WH-1, in Boiler Room Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 9. Lighting in the Multipurpose Room 10. Roof Mounted Exhaust Fan, typical 11. Portable building – South Face 12. Weather stripping on exterior door Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Appendix G Thermographic Photos Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 Coffman Engineers made miscellaneous thermographic images of Mountain View Elementary School using a FLIR T300 Infrared Camera. This is not a thermographic study, rather photographs to illustrate easy-to-identify heat losses. 1. Optical Image, Main School Entrance. Thermal Image is below. 2. Thermographic Image, Main Entrance. No unusual heat loss observed. Temperatures indicated by color scale on right. Yellow indicates heat leakage. The outside temperature was about -14°F. Heat loss at windows is expected. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 3. Optical Image, South Face. Thermal Image below is indicated by the white border. 4. Optical Image, West face –original construction. Thermal Image below is indicated by the white border. 5. Thermographic image, South Face. Heat loss around operable windows can indicate air leakage. 6. Thermal Image, West face. Heat loss is observed from the roof seam and propagates through a crack in the wall. Mountain View Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/15/2012 AkWarm No. CIRI-ANC-CAEC-16 7. Optical Image, West Face –new construction. Thermal Image is below. 8. Optical Image, MPR wall. Thermal Image is below. 9. Thermal Image, West face – new construction. Heat loss is observed through building seams and damage to exterior insulation and finish system. 10. Thermal Image, MPR wall. Heat loss is observed around the door seals, roof seam, and from the former glass brick windows of the MPR. End of Report