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HomeMy WebLinkAboutCIRI-ANC-CAEC Kasun Elementary School 2012-EEENERGY AUDIT FINAL REPORT Kasuun Elementary School 4000 E. 68th Avenue Anchorage, AK 99507 p (907) 349)9444 AkWarm ID No. CIRI)ANC)CAEC)12 800 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 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 i AkWarm No. CIRI)ANC)CAEC)12 Contents I. Executive Summary .................................................................................................................. 1 II. Introduction .............................................................................................................................. 5 III. Energy Audit Process ............................................................................................................. 6 IV. Method of Analysis ................................................................................................................. 7 V. Building Description ................................................................................................................ 8 V.I ARCHITECTURAL DESCRIPTION ............................................................................................................................ 9 V.II MECHANICAL DESCRIPTION ............................................................................................................................... 9 V.III ELECTRICAL DESCRIPTION .............................................................................................................................. 10 V.IV PORTABLE BUILDING DESCRIPTION ................................................................................................................ 11 VI. Historic Energy Consumption and Cost............................................................................. 12 VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 12 VI.II NATURAL GAS CONSUMPTION DATA .............................................................................................................. 12 VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 12 VII. Equipment Inventory and Photo Survey .......................................................................... 14 VIII. Energy Conservation Measures ....................................................................................... 15 VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 15 VIII.II PORTABLE BUILDING ECMS ......................................................................................................................... 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 – Kasuun Elementary School Appendix E – Energy Conservation Measures – Kasuun Portable Building Appendix F – Site Survey Photos Appendix G – Thermographic Photos Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 ii AkWarm No. CIRI)ANC)CAEC)12 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 EPDM Ethylene Propylene Diene Monomer 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 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 iii AkWarm No. CIRI)ANC)CAEC)12 List of Figures Fig. 1 – Energy Audit Clients ....................................................................................................................... 1 Fig. 2 – Energy Benchmark Data .................................................................................................................. 1 Fig. 3 – Anchorage, Alaska – Google Maps ................................................................................................. 5 Fig. 4 – Kasuun Elementary School – Google Maps .................................................................................... 5 Fig. 5 – Kasuun Elementary Floor Plan ........................................................................................................ 8 List of Tables Table 1. Recommended Energy Conservation Measures, Kasuun Elementary School ................................ 2 Table 2. Recommended Energy Conservation Measures, Portable Building ............................................... 4 Table 3. Energy Cost and Consumption Data ............................................................................................. 12 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 iv AkWarm No. CIRI)ANC)CAEC)12 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 AkWarmC , the Alaska Retrofit Information System (ARIS), or other state and/or public information systems. AkWarmC 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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 1 AkWarm No. CIRI)ANC)CAEC)12 I. Executive Summary This report presents the findings of an energy audit conducted at Kasuun 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 99515)3517 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 $63,963 Natural Gas $53,789 Total $117,752 January 2009)December 2010 Energy Utilization Index (EUI) = 119.3 kBtu/sf January 2009)December 2010 Energy Cost Index = 1.88 $/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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 2 AkWarm No. CIRI)ANC)CAEC)12 Table 1. Recommended Energy Conservation Measures, Kasuun Elementary School Executive Summary – Recommended ECMs Kasuun Elementary School Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) KES)1a Refrigerators Replace residential & light commercial refrigerators/freezers older than 5 years old ) ) ) <10 KES)2b Setback Thermostat: Classrooms/ Offices, and MPR Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the classrooms, offices, gym, and multipurpose room $3,952 $555 91.9 0.14 KES)3 Lighting: Office Spaces Add new occupancy sensors, switch night lights with local lighting circuit and re)lamp incandescent desk lamp with compact fluorescent lamps $508 $670 11.06 1.3 KES)4 Lighting: Storage and Utility Rooms Add new occupancy sensors in storage and utility rooms, and switch night lights with local lighting circuit $257 $1,300 2.9 5.1 KES)5 Lighting: Corridor Add a new occupancy sensor in corridor A115, and switch the night lights in the corridors with the local lighting circuit $754 $4,900 2.25 6.5 KES)6c HVAC and DHW Replace lead boiler with a high efficiency, condensing boiler. $10,123 $125,000 1.88 12.35 KES)7b,c HVAC and DHW Install an Exhaust Stack Economizer $1,828 $21,000 1.45 11.5 KES)8 Lighting: Building Mounted Exterior Lighting Replace the Exterior High Pressure Sodium Wall Pack and Canopy Light Fixtures with LED Light Fixtures $1,910 $25,600 1.09 13.4 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 3 AkWarm No. CIRI)ANC)CAEC)12 Executive Summary – Recommended ECMs Kasuun Elementary School Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) KES)9 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,602 $14,000 1.02 8.74 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. c. KES)6 and KES)9 are mutually exclusive and only one should be implemented. The ECMs are not intended to be implemented concurrently. For example, if KES)9 is chosen and a new high efficiency boiler is installed, then KES) 6 should not be completed because installing an exhaust stack economizer is no longer applicable. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 4 AkWarm No. CIRI)ANC)CAEC)12 Table 2. Recommended Energy Conservation Measures, Portable Building Executive Summary – Recommended Energy Conservation Measures (ECMs) 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 $546 $400 16.05 0.73 PB)2 Portable Building Skirting Install R)15 rigid foam board to interior of wall. $771 $1,624 9.13 2.10 PB)3 Exterior Door: Portable Building ) Doors Remove existing door and install standard pre)hung U)0.16 insulated door, including hardware. $88 $781 2.18 8.9 PB)4 Air Tightening Perform air sealing to reduce air leakage by 30%. $113 $950 1.00 8.4 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 5 AkWarm No. CIRI)ANC)CAEC)12 II. Introduction This energy audit was conducted at Kasuun Elementary School (KES) for AHFC and Anchorage School District. The school is a 62,627 square foot (sf) campus that includes a 61,667 sf school and a 960 sf portable classroom unit. 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 – Kasuun Elementary School – Google Maps Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 6 AkWarm No. CIRI)ANC)CAEC)12 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 January 5, 2012. 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. Bob Halpin 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 energy audit into a comprehensive report, and making ECM recommendations for mechanical, electrical, and building envelope improvements. 1 Mr. Bob Halpin, (907) 632)2884 (mobile), (907) 348)5212 (office) Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 7 AkWarm No. CIRI)ANC)CAEC)12 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 in the kitchen, offices, and classrooms. 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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 8 AkWarm No. CIRI)ANC)CAEC)12 V. Building Description Kasuun Elementary School is a single story building constructed in 1996. The building is comprised of three wings of classroom and office spaces, a gymnasium, kitchen, library, and a multipurpose room. The southeast wing houses 10 primary classrooms and a resource room. The southwest wing houses four kindergarten classrooms, an art room, and the main school office. The northeast wing houses 10 intermediate classrooms, a resource room, and supporting utility and storage spaces. Fig. 5 – Kasuun Elementary Floor Plan The facility is operated from 6:30 a.m. until 6 p.m., five days a week during the school year and from 8:30 a.m. until 4 p.m. during summer school. The gymnasium closes at 10 p.m. and maintenance personnel are in the building until 12 a.m. The school year runs from mid August through late May and summer school runs from late May through early July. The school building is shut down for the summer from early July until mid August. There are approximately 476 students and 51 staff that occupy Kasuun Elementary School. There is one portable building on the property that is used for school and after school activities approximately four days per week for one hour. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 9 AkWarm No. CIRI)ANC)CAEC)12 V.I Architectural Description Wall, floor, and roof construction details were obtained from the architectural drawings. Exterior walls of the school were constructed using predominantly 6” metal studs filled with 5.5” of fiberglass batt insulation, 5/8” gypsum wall board, and brick tiles attached to concrete backer board for an effective R) value of R)16.7. The walls surrounding the multipurpose room, kitchen, and mechanical room were constructed using 8” metal studs on 16” centers with 8” fiberglass batts, 5/8” gypsum wall board, and brick tiles over concrete backer board yielding an effective R)value of R)21. Wall heights in most of the building are 11’)4” high. This wall height accounts for a suspended ceiling concealing ductwork and mechanical heating equipment. There are areas in the building with taller exterior walls; the fan room wall height is 32’)8”, the gym wall is 32 feet high, and the multipurpose wall height is 18’)11”. The total above)grade wall area of the school building is 26,397 sf. Floor construction for the school is 4” thick, reinforced, concrete slab)on)grade with two inches of rigid edge insulation (R)10), extending an estimated two feet below grade. The main building has a 58,968 sf slab on grade footprint with a 2,699 sf upper floor for a total of 61,667 sf usable floor space. The roof is ventilated and gabled with a 16 degree slope and consists of a metal deck overlay, 1/2” moisture resistant gypsum wall board, a vapor barrier, 4” thick composite insulation board, a self adhering, modified bitumen ice shield, and composite shingles for an effective R)value of R)23. The gymnasium, library, and fan room have an inverted roof membrane assembly consisting of a metal deck, an estimated 4” of fiberboard insulation, and a single)ply waterproof membrane. The approximate area for the inverted roof membrane assembly is 14,500 sf with an estimated R)value of R)18. Analysis of the building shows a total roof area of 61,479 sf. This is greater than the slab)on grade floor area due to sloped roofs in use. Typical window construction for the school consists of double pane, clear glass with a 3/4” air space between the panes and an aluminum frame with a thermal break. These windows each contain an operable section with 2’x5’ dimensions. An effective insulating value of R)1.6 was given to all windows in the school. The school’s window area for all windows facing south is approximately 700 sf and all other window areas for the school total approximately 1,200 sf. The majority of the exterior man doors in the school are insulated hollow metal doors with an effective R) value of R)2.5. There are four entryway doors that are hollow metal with insulated cores (R)5.3) and four entryway doors that are hollow metal with insulated cores and half lite windows (R)2.2). The outside storage room, adjacent to the mechanical room, has an insulated overhead sectional door with an R)value of R)2.6. All of the doors were installed during the original construction, have weather stripping in fair to poor condition, and are approximately 16 years old. V.II Mechanical Description The school is heated with three gas fired boilers with an input rating of 2,049MBH each that deliver heat to perimeter hydronic baseboards, terminal unit heaters, and hydronic coils in air handling units (AHUs). The boilers are original to the school (1996), are manufactured by Weil McLain, model BG)788, and are equipped with a 0.85kW Weishaupt burner, model DK07)2. Each boiler is provided with a 1 HP primary pump and a 1/6 HP recirculation pump. A pair of 7.5 HP secondary pumps provide hot water to terminal devices throughout the facility and a plate)and)frame heat exchanger in the fan room. The heat exchanger generates hot glycol which is circulated to the air handling units with a pair of 3 HP pumps. An A.O. Smith, model BTP199, gas fired water heater with an 80 gallon storage tank and input rating of 199 MBH is used to provide hot water for the school and kitchen area. The domestic water line has a hot water recirculation line which uses a 1/6 HP, bronze in)line circulator pump. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 10 AkWarm No. CIRI)ANC)CAEC)12 There are four AHUs in the building that are controlled by a Siemens Direct Digital Control (DDC) system. AHU)1 is comprised of dual horizontal draw)through 44” diameter plug fans and serves the majority of the school spaces using two 30 HP fans that together provide 56,500 standard cubic feet per minute (scfm) of conditioned air. AHU)2, a horizontal draw through fan unit with a 7.5 HP motor, provides conditioned air to the multipurpose room and adjacent music office and stage spaces at 11,670 scfm. AHU)3 serves the gymnasium and operates with a 5 HP fan providing tempered air at 7,900 scfm. AHU)4 provides conditioned air to the server room and is located in the fan room. It is a horizontal draw through cabinet fan with a 1/3 HP fan. V.III Electrical Description The school is served by a 2000 amp (A), 120/208 volt (V), three phase, 4)wire, underground electrical service connected to a pad mounted utility transformer. The school has a 125 kilowatt standby diesel generator used to power selected loads in the event of a power outage. Standby power is distributed through two automatic transfer switches to two distribution panels, a 600A transfer switch for standby loads and a 100A transfer switch for emergency loads. Emergency loads include the emergency egress lights. Most fluorescent light fixtures in the school utilize T8 lamps and electronic ballasts. The lighting levels throughout the school were observed to be adequate and within the suggested lighting levels from the Illumination Engineering Society of North America (IESNA). Occupancy sensors are used in many locations throughout the school to control light fixtures. These areas include but are not limited to the classrooms, multipurpose room, and some offices. The corridors feature exposed beams that run perpendicular to the corridor from wall to wall beneath a peaked roof. Most of the corridor lighting is provided from these beams by 1'x4' lensed troffer down lights with two T8 lamps, and 4' single lamp T8 strip up lights illuminating the ceiling from the top of the beams. Incandescent light fixtures were observed in two locations in the school. One fixture was located in a mechanical room, and one other fixture was located in the library office as a desk lamp. The gymnasium was originally illuminated with several 400 watt (W) high bay metal halide light fixtures that have been replaced by four lamp fluorescent T5HO light fixtures. The number of light fixtures was reduced from 18 fixtures to 12 fixtures during the replacement. Exterior lighting consists of 70W high pressure sodium (HPS) canopy lights, 100W HPS wall pack lights and 400W HPS pole mounted parking lot lights. All of the exterior lights are controlled by an on)off photo sensor that switches the light fixtures off during the day. The parking lot lights are also controlled by an input from the security system to shut them off while the building security system is armed. Emergency egress lights are present throughout the building for safety. The record drawings were used to provide a count of the number of night lights present. Approximately 20% of the down lights in the corridors, four fixtures in the gymnasium, and a small number of fixtures in the offices are powered from the emergency panel and are illuminated 24 hours a day. Other electricity)using equipment not previously described in the mechanical or electrical sections include a microwave, electric ranges, other various kitchen equipment, and various user equipment such as projectors, computers, and printers. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 11 AkWarm No. CIRI)ANC)CAEC)12 V.IV Portable Building Description There is one portable located on the Kasuun Elementary School campus. It is used as a classroom space for one hour approximately three days per week. The portable is also utilized for after school activities once a week for one hour. Power for this portable is drawn from the main electric breaker at the school building. The portable was constructed in 1981. The portable building was constructed with 2”x4” wood stud walls on 16” centers with R)11 fiberglass batt insulation. The exterior face of the wall is T1)11 siding with drywall on the interior. The exterior wall heights are nine feet high to the roof eaves but extend to 11 feet at the roof peak in the center of the end walls. The portable has 1,170 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 is constructed of plywood flooring resting on 2”x8” wood joists. It is estimated that the floor has R)19 fiberglass batt insulation. There is approximately 960 sf of floor area. The portable is covered by a ventilated cold roof with shingles on top of plywood decking. It is estimated that the roof is insulated with R)19 fiberglass batts. The portable has 1,100 sf of roof area. This is greater than the floor area due to sloped roofs in use. There are two double paned, wood framed windows in the portable with an estimated R)value of R)2.0 per window. The portable has two insulated metal doors with an effective R)value of R)1.7 each. There is approximately 40 sf of door area and 38 sf of window area. The portable is heated with five electric resistance perimeter baseboards and an electric unit heater. The electric baseboard temperature set point for all of the baseboards is manually controlled by dial thermostat. The unit heater temperature set point is manually controlled by a separate dial thermostat. Due to the need to keep these buildings moveable and due to combustion safety issues, the ASD states its desire to keep all portable buildings on electric heat and not utilize natural gas heating at this time. An overhead electric feeder is routed from the school to a small distribution panel in each of the portable buildings to distribute power to the electric loads including the unit heater, baseboard heaters, receptacles and the portable lighting. The lighting in the portables consists of fluorescent T12 light fixtures. A separate AkWarm model was created to model the portable building. See Appendix E, Energy Conservation Measures, for the details of each recommended ECM for the portable building. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 12 AkWarm No. CIRI)ANC)CAEC)12 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. Chugach Electric 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 surcharges, 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, 100 watt 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 utility measures consumption and bills 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 or 1 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 natural gas utility data provided, the average cost for the energy and consumption calculations at the surveyed facility are summarized in the table below. Table 3. Energy Cost and Consumption Data Energy Cost and Consumption Data 2009 2010 Average Electric Rate 0.14 $/kWh 0.12 $/kWh 0.13 $/kWh Natural Gas Rate 1.01 $/CCF 0.86 $/CCF 0.93 $/CCF Total Cost $130,837 $104,666 $117,752 ECI 2.09 $/sf 1.67 $/sf 1.88 $/sf Electric EUI 28.1 kBtu/sf 26.9 kBtu/sf 27.5 kBtu/sf Natural Gas EUI 95.2 kBtu/sf 88.4 kBtu/sf 91.8 kBtu/sf Building EUI 123.3 kBtu/sf 115.3 kBtu/sf 119.3 kBtu/sf Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 13 AkWarm No. CIRI)ANC)CAEC)12 The Energy Cost Index (ECI) is derived by dividing the annual cost by the school campus square footage. The school campus square footage was calculated to be approximately 62,627 square feet. This area includes a 61,667 sf main building with upper floor and a 960 sf portable building. 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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 14 AkWarm No. CIRI)ANC)CAEC)12 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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 15 AkWarm No. CIRI)ANC)CAEC)12 VIII. Energy Conservation Measures The following ECMs described here have been calculated by AkWarm Commercial and considered by the energy audit team as viable projects. ECMs provided below are considered to have viable financial ratios (SIR>1) or to add value to the building or building operational profiles. For a full list of ECMs considered and calculated by the energy audit team, including ECMs not recommended at this time, please see Appendix D. VIII.I School Energy Conservation Measures ECM# KES=1 – Replace Refrigerators Older than 5 years Old Annual Energy Savings Installed Cost SIR Payback (years) ) ) ) <10 years Due to recent advances in refrigerators in the last five years, new Energy Star refrigerators are significantly more efficient than previous models. Replacing existing refrigerators, which are older than five years old, with new energy star models will typically have paybacks of less than 10 years. ECM # KES=2– Setback Thermostat: Classrooms, Offices, and Multipurpose Room Annual Energy Savings Installed Cost SIR Payback (years) $3,952 $555 91.9 0.14 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 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 cost of this ECM only includes the time required to reprogram the night setback. 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. ECM # KES=3 – Upgrade Lighting and Controls in the Office Spaces Annual Energy Savings Installed Cost SIR Payback (years) $508 $670 11.06 1.3 The office spaces in the school are primarily illuminated by T8 light fixtures with electronic ballasts. The lighting in several of these offices are currently controlled by occupancy sensors, however one of these office spaces do not have occupancy sensors for control. It is recommended that one ceiling mounted occupancy sensor is installed to control approximately (9) 4)lamp fluorescent T8 light fixtures. Additionally there were (2) 2)lamp incandescent desk lamp observed that should be re)lamped with a compact fluorescent lamp (CFL). There are one 2)lamp and three 4)lamp fluorescent T8 light fixtures that are powered by the school’s emergency system; these lights should be switched with the local lighting circuit. This description compiles measures 3, 5, 6, and 7 which were individually modeled in AkWarm. See appendix D for details of individual measures. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 16 AkWarm No. CIRI)ANC)CAEC)12 ECM # KES=4 – Upgrade Storage and Utility Room Lighting Annual Energy Savings Installed Cost SIR Payback (years) $257 $1,300 2.9 5.1 There are (4) 4' 2)lamp T8 fluorescent light fixtures that are currently being used as night lights in the custodian, utility and storage rooms and are never switched off. These lights should be re)wired to be controlled by the local lighting circuit, and have their function as emergency lights replaced by wall mounted emergency lighting units type. Though most of the custodian and storage spaces are already controlled by occupancy sensors, we suggest that the three remaining spaces that use wall switches for control be provided new ceiling mounted occupancy sensors to switch the lights off while the space is un)occupied. This description compiles measures 4, 9, 20, 21, and 23 which were individually modeled in AkWarm. See appendix D for details of individual measures. ECM # KES=5 – Upgrade Corridor Lighting Annual Energy Savings Installed Cost SIR Payback (years) $754 $4,900 2.25 6.5 There are approximately (20) 4' 2)lamp T8 fluorescent troffer light fixtures that are currently being used as night lights in the corridors and are never switched off. This ECM includes re)wiring all of the night lights to be controlled by local lighting circuits, and have the emergency lighting function replaced by approximately (20) wall mounted emergency lighting units. It also recommends installing a new occupancy sensor to control the lighting in corridor A115. Although not modeled due to complex architectural features, savings would also be enhanced with occupancy sensors for all of the corridor lighting zones. See items 8, 10 and 11 in Appendix D for further details. ECM # KES=6 – Replace Lead Boiler with a High Efficiency Condensing Type Boiler Annual Energy Savings Installed Cost SIR Payback (years) $10,123 $125,000 1.88 12.35 Significant energy savings can be achieved by replacing boiler B)1 with a new, high efficiency, condensing type boiler. The remaining existing boilers would operate as back)up boilers for supplemental heat. New modulating and condensing high efficiency boilers vary their heat output rate to match the heating needs of the building. This allows the boiler to operate with lower return water temperatures and reduce boiler on/off cycling to significantly increase the boiler’s efficiency. See item 13 in Appendix D for more information. Note: An exhaust stack economizer cannot be used in conjunction with a high efficiency condensing type boiler. If ECM KES9 is implemented, ECM KES6 cannot be used. ECM # KES=7 – Install Exhaust Stack Economizer Annual Energy Savings Installed Cost SIR Payback (years) $1,828 $21,000 1.45 11.5 Installing one exhaust stack economizer on the combined exhaust stack of the three existing gas fired boilers will recover heat from exhaust gases. An exhaust stack economizer utilizes a fan and heat exchanger to transfer heat from exhaust gases to the hydronic system, increasing the efficiency of the heating system by approximately 5% or more. This ECM was modeled with a separate AkWarm model Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 17 AkWarm No. CIRI)ANC)CAEC)12 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. Note: An exhaust stack economizer cannot be used in conjunction with a high efficiency condensing type boiler described in ECM KES9. ECM KES9 and ECM KES6 are mutually exclusive and are not intended to be implemented concurrently. ECM # KES=8 – Upgrade Exterior Lighting Annual Energy Savings Installed Cost SIR Payback (years) $1,910 $25,600 1.09 13.4 The exterior lighting at the site consists of (26) 70W HPS canopy lights, (21) 150W HPS wall packs, (15) 400W HPS pole mounted "shoebox" type area lighters, (4) 400W HPS pole mounted twin head "shoebox" area lighters, and (4) 400W HPS pole mounted 3)head "shoebox" area lighters. All of the exterior lighting is controlled by contactors, mounted in the boiler room, which are controlled by a signal from the DDC system that turns on the lights based on an input from a central photocell. Additionally, the parking lot lights are controlled by an input from the DDC system that shuts them off while the security system is alarmed. The building mounted light fixtures remain on all night. This ECM would replace the wallpack and canopy light fixtures with 75W and 35W LED light fixtures, respectively. This assumes the re)use of wiring. Upgrading the parking lot HPS light fixtures was evaluated. However, due to the fact that these lights have a night shut off, replacing them with LED fixtures did not prove to be cost effective. This description compiles measures 12 and 14 which were individually modeled in AkWarm. See appendix D for details of individual measures. ECM # KES=9 – Perform Air Sealing to Reduce Air Leakage by 20% Annual Energy Savings Installed Cost SIR Payback (years) $1,602 $14,000 1.02 8.74 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. Also, inspect and repair louvers and dampers within each AHU. To achieve a viable economic benefit, up to $14,000 can be invested and still achieve an SIR ≥ 1 by reducing air leakage by 20%. See item 12 in Appendix D for more information. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 18 AkWarm No. CIRI)ANC)CAEC)12 VIII.II Portable Building ECMs ECM #PB=1 – Setback Thermostat Annual Energy Savings Installed Cost SIR Payback (years) $546 $400 16.05 0.73 Significant energy savings exist by reducing the room temperature of the portable building when unoccupied. However, the dial thermostat is not programmable, resulting in higher temperatures than required. A programmable thermostat with separate occupied and unoccupied temperature set points is recommended for the portable building. Reducing the temperature from 65 deg F to 60 deg F during unoccupied times will save $546 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) $771 $1,624 9.13 2.11 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 – Replace Exterior Doors Annual Energy Savings Installed Cost SIR Payback (years) $88 $781 2.18 8.9 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 3 in Appendix E for more information. ECM #PB=4– Seal Building Envelope and Reduce Infiltration by 30% Annual Energy Savings Installed Cost SIR Payback (years) $113 $950 1.0 8.4 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, and sealing any roof and wall penetrations. See item 4 in Appendix E for more information. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 19 AkWarm No. CIRI)ANC)CAEC)12 ECM #PB=5 – Replace Lighting in the Portable Building Annual Energy Savings Installed Cost SIR Payback (years) $101 $1,800 0.82 17.8 The figures for this ECM are based on the portables existing usage schedule of approximately 4 hours per week. Based on this schedule, replacing the lighting will not result in an SIR above 1.0. However, if the portable were to be used as a regular classroom, replacing the existing T12 lighting with T8 fixtures and installing a new ceiling mounted occupancy sensor for control would save approximately $405 per year and result in an SIR of 3.8. The installed cost for this ECM would not change from what is listed above. Refer to item PB)5 in Appendix D for more information. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 20 AkWarm No. CIRI)ANC)CAEC)12 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. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix A Energy Benchmark Data First Name Last Name Middle Name Phone Calvin Mundt 748-3648 State Zip AK Monday- Friday Saturday Sunday Holidays 8-4:30 Average # of Occupants During 527 Renovations Date Date Mailing Address 07/22/11 Building Usage Building Square Footage 99517 Email mundt_calvin@asdk12.org 4000 E 68th Ave Year Built REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner MOA Building Name/ Identifier Primary Operating Hours Contact Person City Anchorage 62,627 Facility Zip 1996 Details Anchorage Facility Address Building Type Mixed Community Population Facility City Facility Owned By 261,500 Municipal Government/Subdivision Kasuun Elementary Education - K - 12 PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton Other energy sources? Describe 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. Kasuun Elementary Buiding Size Input (sf) =62,627 2009 Natural Gas Consumption (Therms)59,614.00 2009 Natural Gas Cost ($)59,915 2009 Electric Consumption (kWh)516,075 2009 Electric Cost ($)70,922 2009 Total Energy Use (kBtu)7,722,764 2009 Total Energy Cost ($)130,837 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 95.2 2009 Electricity (kBtu/sf)28.1 2009 Energy Utilization Index (kBtu/sf)123.3 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf)0.96 2009 Electric Cost Index ($/sf)1.13 2009 Energy Cost Index ($/sf)2.09 2010 Natural Gas Consumption (Therms)55,342.00 2010 Natural Gas Cost ($)47,663 2010 Electric Consumption (kWh)494,236 2010 Electric Cost ($)57,003 2010 Total Energy Use (kBtu)7,221,027 2010 Total Energy Cost ($)104,666 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf)88.4 2010 Electricity (kBtu/sf)26.9 2010 Energy Utilization Index (kBtu/sf)115.3 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf)0.76 2010 Electric Cost Index ($/sf)0.91 2010 Energy Cost Index ($/sf)1.67 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Kasuun 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 NGC369 Jan-09 01/14/09 02/17/093480378037$8,114$1.01Enstar NGC369 Mar-09 02/17/09 03/17/092863916391$6,463$1.01Enstar NGC369 Apr-09 03/17/09 04/17/093167406740$6,824$1.01Enstar NGC369 May-09 04/17/09 05/18/093151845184$5,258$1.01Enstar NGC369 Jun-09 05/18/09 06/18/093133633363$3,434$1.02Enstar NGC369 Jul-09 06/18/09 07/20/093220852085$2,151$1.03Enstar NGC369 Aug-09 07/20/09 08/19/093016081608$1,677$1.04Enstar NGC369 Sep-09 08/19/09 09/16/092829172917$2,994$1.03Enstar NGC369 Sep-09 09/16/09 10/15/092940854085$4,165$1.02Enstar NGC369 Oct-09 10/15/09 11/16/093255145514$5,596$1.01Enstar NGC369 Nov-09 11/16/09 12/15/092965636563$6,646$1.01Enstar NGC369 Dec-09 12/15/09 01/15/103171277127$6,593$0.93Enstar NGC369 Jan-10 01/15/10 02/17/103368226822$5,706$0.84Enstar NGC369 Mar-10 02/17/10 03/16/102759925992$5,016$0.84Enstar NGC369 Apr-10 03/16/10 04/19/103457595759$4,851$0.84Enstar NGC369 May-10 04/19/10 05/17/102845654565$3,876$0.85Enstar NGC369 Jun-10 05/17/10 06/16/103034993499$2,994$0.86Enstar NGC369 Jun-10 06/16/10 07/15/102923152315$2,002$0.86Enstar NGC369 Aug-10 07/15/10 08/18/103421212121$1,934$0.91Enstar NGC369 Sep-10 08/18/10 09/17/103024722472$2,325$0.94Enstar NGC369 Oct-10 09/17/10 10/15/102834933493$3,167$0.91Enstar NGC369 Oct-10 10/15/10 11/15/103147554755$4,184$0.88Enstar NGC369 Nov-10 11/15/10 12/13/102858955895$5,085$0.86Enstar NGC369 Dec-10 12/13/10 01/19/113776547654$6,523$0.85Jan - 09 to Dec - 09 total:59,61459,6140$59,915$0Jan - 10 to Dec - 10 total:55,34255,3420$47,663$0$1.01$0.86Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg: $4,000 $5,000 $6,000 $7,000 $8,000 $9,000 400050006000700080009000Natural Gas Cost ($)Natural Gas Consumption (Therms)Kasuun Elementary - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($)$0 $1,000 $2,000 $3,000 0100020003000Jan-09 Mar-09 May-09 Jul-09 Sep-09 Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10Natural Gas Consumption (Therms)Date (Mon - Yr) Kasuun ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)CEA 1-17996953 Jan-09 1/6/2009 2/5/200930577081,970180$8,933$0.150CEA 1-17996953 Feb-09 2/5/2009 3/9/200932486941,662180$7,465$0.150CEA 1-17996953 Mar-09 3/9/2009 4/7/200929491561,678166$7,307$0.150CEA 1-17996953 Apr-09 4/7/2009 5/7/200930452061,543144$6,598$0.150CEA 1-17996953 May-09 5/7/2009 6/5/200929376351,284142$5,796$0.150CEA 1-17996953 Jun-09 6/5/2009 7/7/20093215905543135$2,471$0.160CEA 1-17996953 Jul-09 7/7/2009 8/5/2009291789961186$2,661$0.150CEA 1-17996953 Aug-09 8/5/2009 9/3/200929366981,253133$4,904$0.130CEA 1-17996953 Sep-09 9/3/2009 10/5/200932464661,586143$5,615$0.120CEA 1-17996953 Oct-09 10/5/2009 11/4/200930508741,736153$6,220$0.120CEA 1-17996953 Nov-09 11/4/2009 12/4/200930553551,889166$6,707$0.120CEA 1-17996953 Dec-09 12/4/2009 1/5/201032544791,859182$6,245$0.110 CEA 1-17996953 Jan-10 1/5/2010 2/5/201031570771,948182$6,419$0.110CEA 1-17996953 Feb-10 2/5/2010 3/8/201031490121,673182$5,437$0.110CEA 1-17996953 Mar-10 3/8/2010 4/7/201030487101,662161$5,593$0.110CEA 1-17996953 Apr-10 4/7/2010 5/7/201030457651,562140$5,307$0.120CEA 1-17996953 May-10 5/7/2010 6/8/201032349361,192138$4,384$0.130CEA 1-17996953 Jun-10 6/8/2010 7/8/20103018933646134$2,438$0.130CEA 1-17996953 Jul-10 7/8/2010 8/6/2010291803261583$2,368$0.130CEA 1-17996953 Aug-10 8/6/2010 9/6/201031322991,102128$3,823$0.120CEA 1-17996953 Sep-10 9/7/2010 10/11/201034402471,374134$4,633$0.120CEA 1-17996953 Oct-10 10/12/2010 11/8/201027467421,595150$5,309$0.110CEA 1-17996953 Nov-10 11/8/2010 12/3/201025497921,699158$5,465$0.110CEA 1-17996953 Dec-10 12/4/2010 1/5/201132526911,798158$5,827$0.110Jan - 09 to Dec - 09 total:51607517,6141810$70,9220Jan - 10 to Dec - 10 total:49423616,8681748$57,0030$0.14$0.12Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg: $4,000$5,000$6,000$7,000$8,000$9,000$10,0003000040000500006000070000Electric Cost ($)Electric Consumption (kWh)Kasuun Elementary - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$1,000$2,000$3,000$4,00001000020000Jan-09 Mar-09 May-09 Jul-09 Sep-09 Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10Electric Consumption (kWh)Date (Mon - Yr) Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix B AkWarm Commercial Reports Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 6/15/2012 3:48 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Kasuun ES Auditor Company: Coffman Engineers, Inc. Address: 4000 E 68th 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: 1301 Labar Street Anchorage, AK 99515 Auditor Phone: (907) 276)6664 Auditor FAX: Client Phone: (907) 742)5213 Auditor Comment: Client FAX: Design Data Building Area: 61,667 square feet Design Heating Load: Design Loss at Space: 2,156,961 Btu/hour with Distribution Losses: 2,270,486 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 3,461,106 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 527 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: Chugach Electric ) Commercial ) Sm Natural Gas Provider: Enstar Natural Gas ) Commercial ) Sm Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.930/ccf Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 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 $49,724 $0 $2,914 $25,437 $19,664 $0 $0 $17,087 $0 $114,826 With Proposed Retrofits $34,168 $0 $2,914 $18,774 $19,370 $0 $0 $17,087 $0 $92,313 SAVINGS $15,556 $0 $0 $6,663 $294 $0 $0 $0 $0 $22,513 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School $0$20,000$40,000$60,000$80,000$100,000$120,000Existing RetrofitNatural GasElectricityAnnual Energy Costs by Fuel Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Natural Gas (Right) Consumption (Orange). Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange). Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Elementary School Monthly Modeled Consumption (Blue compared to Actual Natural Gas Consumption (Orange) Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Portable Building ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 6/15/2012 3:51 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Kasuun ES ) Portable Building Auditor Company: Coffman Engineers, Inc. Address: 4000 E 68th 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: 1301 Labar Street Anchorage, AK 99515 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: 35,804 Btu/hour with Distribution Losses: 35,804 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 54,579 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 10 people Design Indoor Temperature: 72 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: Chugach Electric ) Commercial ) Sm Natural Gas Provider: Enstar Natural Gas ) Commercial ) Sm Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Portable Building 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 $3,704 $0 $0 $146 $0 $65 $0 $0 $0 $0 $3,915 With Proposed Retrofits $1,740 $0 $0 $45 $0 $65 $0 $0 $0 $0 $1,850 SAVINGS $1,964 $0 $0 $101 $0 $0 $0 $0 $0 $0 $2,066 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Portable Building $0$1,000$2,000$3,000$4,000Existing RetrofitSpace HeatingOther ElectricalLightingAnnual Energy Costs by End Use Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Portable Building Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Portable Building $0$500$1,000$1,500$2,000$2,500FloorWall/DoorWindowCeilingAirExistingRetrofitAnnual Space Heating Cost by Component Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix C Major Equipment List Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 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)MCLAIN BG)788)W CAST IRON GAS FIRED 2049 MBH ≈ 80% ) 30 ≈ 14 B)2 BOILER RM BUILDING HEATING WEIL)MCLAIN BG)788)W CAST IRON GAS FIRED 2049 MBH ≈ 80% ) 30 ≈ 14 B)3 BOILER RM BUILDING HEATING WEIL)MCLAIN BG)788)W CAST IRON GAS FIRED 2049 MBH ≈ 80% ) 30 ≈ 14 P)1 BOILER RM HEATING WATER CIRC BELL & GOSSETT 2.5BB 9.0BF BASE)MOUNTED 275GPM 70' ≈ 88.5% 7.5 HP 20 4 P)2 BOILER RM HEATING WATER CIRC BELL & GOSSETT 2.5BB 9.0BF BASE)MOUNTED 275GPM 70' ≈ 88.5% 7.5 HP 20 4 P)3 BOILER RM BOILER CIRC BELL & GOSSETT ) INLINE 95GPM 20' NEMA STANDARD 1 HP 10 0 P)4 BOILER RM BOILER CIRC BELL & GOSSETT ) INLINE 95GPM 20' NEMA STANDARD 1 HP 10 0 P)5 BOILER RM BOILER CIRC BELL & GOSSETT ) INLINE 95GPM 20' NEMA STANDARD 1 HP 10 0 P)6 BOILER RM BOILER RECIRC BELL & GOSSETT M10711 INLINE 28GPM 10’ NEMA STANDARD 1/6 HP 10 0 P)7 BOILER RM BOILER RECIRC BELL & GOSSETT M10711 INLINE 28GPM 10’ NEMA STANDARD 1/6 HP 10 0 P)8 BOILER RM BOILER RECIRC BELL & GOSSETT M10711 INLINE 28GPM 10’ NEMA STANDARD 1/6 HP 10 0 P)9 FAN RM GLYCOL CIRC BELL & GOSSETT ) INLINE 140GPM 40’ 89.5% 3 HP 10 0 P)10 FAN RM GLYCOL CIRC BELL & GOSSETT ) INLINE 140GPM 40’ 89.5% 3 HP 10 0 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) P)11 BOILER RM DOMESTIC HOT WATER RECIRC BELL & GOSSETT M74794 INLINE 5GPM 17’ NEMA STANDARD 1/6 HP 10 0 P)12 BOILER RM FIRE LINE RECIRC GRUNDFOS UP25)64SF INLINE 6GPM 12’ NEMA STANDARD 125 W 10 0 AHU)1 FAN RM CLASSROOM SUPPLY TEMTROL WF)DH101P CENTRIFUGAL 56500CFM 4.0" ≈ 91.7% 2 X 30HP 25 8 AHU)2 FAN RM KITCHEN, MUSIC RM, MPR TEMTROL WF)DH24M CENTRIFUGAL 11670CFM 2" ≈ 91.7% 7.5HP 25 8 AHU)3 FAN RM GYM SUPPLY TEMTROL WF)DH17R CENTRIFUGAL 7900CFM 2" ≈ 80% 5HP 25 8 AHU)4 FAN RM SERVER RM GAYLORD MCF)500A CABINET 600CFM 0.9" ≈ 80% 0.5HP 25 8 RF)1 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 RF)2 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 RF)3 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) RF)4 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 RF)5 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 RF)6 FAN RM BUILDING RELIEF GREENHECK SPD)CA)36 PROPELLER 11930CFM 0.4" ≈ 80% 1.5HP 15 0 EF)1 FAN RM TOILET EXHAUST GREENHECK SFB)15)10)CCW)UB CENTRIFUGAL 2280CFM 0.9" NEMA STANDARD 1HP 25 10 EF)2 ROOF KITCHEN HOOD EXHAUST GREENHECK CUBE 100 CENTRIFUGAL 800CFM 0.3" NEMA STANDARD 0.25HP 25 8 EF)3 FAN RM JANITOR EXHAUST GREENHECK SFD)6)4A)CCW)UB CENTRIFUGAL 245CFM 0.4" NEMA STANDARD 0.25HP 25 10 EF)4 JANITOR A122 JANITOR EXHAUST PENN ZEPHYR CENTRIFUGAL 190CFM 0.10" NEMA STANDARD 105W 25 10 EF)5 JANITOR B112 JANITOR EXHAUST PENN ZEPHYR CENTRIFUGAL 48CFM 0.10" NEMA STANDARD 48W 25 10 CF)1 BOILER RM COMBUSTION AIR GREENHECK BC24Q CENTRIFUGAL 3900CFM 0.875" NEMA STANDARD 0.75HP 25 8 F)1 RECEPTION A102 RECIRC PENN TDA Z12 CABINET 500CFM 0.5" NEMA STANDARD 206W 25 8 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix D Energy Conservation Measures Kasuun Elementary School Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 The following tables consist of raw output data from the AkWarm Commercial program used to model energy costs and calculate energy savings and financial ratios. These tables represent all of the energy conservation measures calculated and considered by the energy audit team. However, ECMs included in the Executive Summary and Section VIII are recommended by the energy audit team due to their viable financial ratios (SIR>1) or due to their value added. 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. $3,387 $449 97.41 0.1 2 Setback Thermostat: Gymnasium / Multipurpose Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gymnasium / Multipurpose space. $490 $106 59.63 0.2 3 Lighting ) Controls Retrofit: Office Add new Occupancy Sensor and Improve Manual Switching $344 $300 16.74 0.9 4 Lighting ) Controls Retrofit: Storage Add new Occupancy Sensor and Improve Manual Switching $63 $100 9.22 1.6 5 Lighting ) Controls Retrofit: Office Add new Occupancy Sensor and Improve Manual Switching $57 $100 8.37 1.7 6 Lighting ) Controls Retrofit: Office Add new Occupancy Sensor $67 $150 6.50 2.2 7 Lighting ) Power Retrofit: Office Replace with 2 FLUOR (2) CFL, Spiral 20 W $40 $120 4.81 3 8 Lighting ) Controls Retrofit: Corridor Add new Occupancy Sensor $38 $150 3.74 3.9 9 Lighting ) Controls Retrofit: Utility Improve Manual Switching $184 $750 3.59 4.1 10 Lighting ) Controls Retrofit: Corridor Improve Manual Switching $716 $4,750 2.20 6.6 11 HVAC And DHW Replace boiler BLR)1 with a high efficiency condensing boiler. $10,134 $125,000 1.89 12.3 12 Lighting ) Controls Retrofit: Corridor Improve Manual Switching $20 $200 1.43 10.2 13 Lighting ) Power Retrofit: Exterior Lighting Replace with 21 LED 72W Module StdElectronic $1,155 $12,600 1.34 10.9 14 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,613 $14,000 1.02 8.7 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 15 Lighting ) Power Retrofit: Exterior Lighting Replace with 26 LED 35W Module StdElectronic $755 $13,000 0.85 17.2 16 Lighting ) Power Retrofit: Exterior Lighting Replace with 4 LED (2) 150W Module (2) StdElectronic $734 $16,000 0.67 21.8 17 Lighting ) Power Retrofit: Exterior Lighting Replace with 15 LED 150W Module StdElectronic $1,377 $30,000 0.67 21.8 18 Lighting ) Power Retrofit: Exterior Lighting Replace with 4 LED (3) 150W Module (3) StdElectronic $1,101 $24,000 0.67 21.8 19 Lighting ) Controls Retrofit: Class Toilet Add new Occupancy Sensor $4 $150 0.34 42.7 20 Lighting ) Controls Retrofit: Custodian Add new Occupancy Sensor $4 $150 0.34 42.7 21 Lighting ) Controls Retrofit: Storage Add new Occupancy Sensor $4 $150 0.34 42.6 22 Other Electrical ) Power Retrofit: PMP)3, PMP)4, & PMP)5 Replace with 3 Pump & Motor (1 HP) $193 $5,148 0.31 26.7 23 Lighting ) Controls Retrofit: Storage Add new Occupancy Sensor $2 $150 0.17 85.3 24 Other Electrical ) Power Retrofit: PMP)6, PMP)7 & PMP)8 Replace with 3 Pump & Motor (1/6 HP) $33 $2,226 0.12 67.8 TOTAL $22,513 $249,749 1.6 11.1 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS 1. Building Envelope Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 14 Air Tightness estimated as: 0.89 cfm/ft2 of above)grade shell area at 75 Pascals Perform air sealing to reduce air leakage by 20%. $14,000 $1,613 2. Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 11 Replace boiler BLR)1 with a high efficiency condensing boiler. $125,000 $10,134 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. $449 $3,387 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. $106 $490 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 3 Office 3 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor and Improve Manual Switching $300 $344 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 4 Storage FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor and Improve Manual Switching $100 $63 5 Office FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor and Improve Manual Switching $100 $57 6 Office 9 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $67 7 Office 2 INCAN (2) A Lamp, Std 60W with Manual Switching Replace with 2 FLUOR (2) CFL, Spiral 20 W $120 $40 8 Corridor 5 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $38 9 Utility 3 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Improve Manual Switching $750 $184 10 Corridor 19 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Improve Manual Switching $4,750 $716 12 Corridor FLUOR T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Improve Manual Switching $200 $20 13 Exterior Lighting 21 HPS 150 Watt Magnetic with Manual Switching Replace with 21 LED 72W Module StdElectronic $12,600 $1,155 15 Exterior Lighting 26 HPS 70 Watt Magnetic with Manual Switching Replace with 26 LED 35W Module StdElectronic $13,000 $755 16 Exterior Lighting 4 HPS (2) 400 Watt (2) Magnetic with Manual Switching Replace with 4 LED (2) 150W Module (2) StdElectronic $16,000 $734 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 17 Exterior Lighting 15 HPS 400 Watt Magnetic with Manual Switching Replace with 15 LED 150W Module StdElectronic $30,000 $1,377 18 Exterior Lighting 4 HPS (3) 400 Watt (3) Magnetic with Manual Switching Replace with 4 LED (3) 150W Module (3) StdElectronic $24,000 $1,101 19 Class Toilet 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $4 20 Custodian 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $4 21 Storage FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $4 23 Storage FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching Add new Occupancy Sensor $150 $2 Other Electrical Equipment Rank Location Existing Recommended Installed Cost Annual Energy Savings 22 PMP)3, PMP)4, & PMP)5 3 Pump & Motor (1 HP) with Manual Switching Replace with 3 Pump & Motor (1 HP) $5,148 $193 24 PMP)6, PMP)7 & PMP)8 3 Pump & Motor (1/6 HP) with Manual Switching Replace with 3 Pump & Motor (1/6 HP) $2,226 $33 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix E Energy Conservation Measures Kasuun Portable Building Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 The following tables consist of raw output data from the AkWarm Commercial program used to model energy costs and calculate energy savings and financial ratios. These tables represent all of the energy conservation measures calculated and considered by the energy audit team. However, ECMs included in the Executive Summary and Section VIII are recommended by the energy audit team due to their viable financial ratios (SIR>1) or due to their value added. 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. $546 $400 16.05 0.7 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. $771 $1,624 9.13 2.1 3 Exterior Door: Portable Building ) Doors Remove existing door and install standard pre)hung U)0.16 insulated door, including hardware. $88 $781 2.18 8.8 4 Air Tightening Perform air sealing to reduce air leakage by 30%. $113 $950 1.00 8.4 5 Lighting: Flourescent Lighting Replace with 11 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $101 $1,800 0.82 17.8 6 Above)Grade Wall: Portable Building ) 2x4 Stud Wall Install R)15 rigid foam board to exterior and cover with T1)11 siding or equivalent. $415 $10,512 0.76 25.3 7 Window/Skylight: Portable Building ) Double Pane Windows Replace existing window with U)0.35 wood window $30 $1,962 0.22 65.9 TOTAL $2,066 $18,029 1.87 8.7 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 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 $771 6 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)15 rigid foam board to exterior and cover with T1)11 siding or equivalent. $10,512 $415 Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 3 Exterior Door: Portable Building ) Doors Door Type: Entrance, Metal, fiberglass core; metal edge Modeled R)Value: 1.7 Remove existing door and install standard pre)hung U) 0.16 insulated door, including hardware. $781 $88 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 7 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 $1,962 $30 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 4 Air Tightness estimated as: 818 cfm at 50 Pascals Perform air sealing to reduce air leakage by 30%. $950 $113 2. Mechanical Equipment Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Portable Building Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. $400 $546 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 5 Flourescent Lighting 11 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 11 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor $1,800 $101 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix F Site Survey Photos Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 1. School, Main Entrance 2. School, East Face 3. Portable Bldg, East Face 4. Kitchen Refrigerators and Freezers 5. Boilers, B)1, B)2, and B)3 in Boiler Room 6. Variable Frequency Drives for P)1 and P)2 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 7. High Efficiency, Basemounted Pumps P)1 and P)2 8. Domestic Hot Water Heater 9. Combustion Fan, CF)1, in Boiler Room 10. Fire Line Recirc Pump, P)12 Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 11. School Emergency Generator 12. AHU)1 in Fan Room 13. Boiler Flue Stack 14. Variable Frequency Drive for AHU)1 Fan Motors Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 15. Exhaust Fans, EF)1 and EF)3 in Fan Room 16. Roof Fans, RF)1 Through RF)5 17. Weather Stripping Damage on Exterior Door near Gym 18. Weather Stripping Damage on Exterior Door of Gym Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Appendix G Thermographic Photos Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 Coffman Engineers made miscellaneous thermographic images of Kasuun 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 Entrance. Thermal Image below is indicated by the white border. 2. Thermographic Image, Main Entrance. Temperatures indicated by color scale on right. Yellow indicates heat leakage. The outside temperature was about 8°F. Heat loss around doors indicates a need for improved weatherization. Heat loss from a ventilated roof is expected. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 3. Optical Image, Northwest window. Thermal Image at right is indicated by the white border. 4. Thermographic image, Northwest window. Heat loss around metal window frames is expected. 5. Optical Image, South Face. Thermal Image at right is indicated by the white border. 6. Thermal Image, South Face. Heat loss at the door seam indicates a need for improved weatherization. Metal building studs can also be seen. Kasuun Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/19/2012 AkWarm No. CIRI)ANC)CAEC)12 7. Optical Image, North Face. Thermal image at right. 8. Thermal Image, North Face. Heat loss is occurring along exterior door seams and along structural members in the fan room. 9. Optical Image, Portable Building. Thermal image shown at right. 10. Thermal Image, Portable Building. Heat losses around the door can indicate a need for weather stripping replacement. End of Report