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Home My WebLink AboutCIRI-ANC-CAEC Inlet View Elementary School 2012-EEENERGY AUDIT FINAL REPORT Inlet View Elementary 1219 N Street Anchorage, AK 99501 p (907) 742&7630 AkWarm ID No. CIRI&ANC&CAEC&10 800 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 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 i AkWarm No. CIRI&ANC&CAEC&10 Contents I. Executive Summary .................................................................................................................. 1 II. Introduction .............................................................................................................................. 5 III. Energy Audit Process ............................................................................................................. 6 IV. Method of Analysis ................................................................................................................. 7 V. Building Description ................................................................................................................ 8 V.I SCHOOL ARCHITECTURAL DESCRIPTION .............................................................................................................. 9 V.II MECHANICAL DESCRIPTION ............................................................................................................................. 10 V.III ELECTRICAL DESCRIPTION .............................................................................................................................. 11 V.IV OUTBUILDINGS DESCRIPTION.......................................................................................................................... 11 VI. Historic Energy Consumption and Cost............................................................................. 13 VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 13 VI.II NATURAL GAS CONSUMPTION DATA .............................................................................................................. 13 VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 13 VII. Equipment Inventory and Photo Survey .......................................................................... 15 VIII. Energy Conservation Measures ....................................................................................... 16 VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 16 VIII.II OUTBUILDINGS ENERGY CONSERVATION MEASURES .................................................................................. 21 VIII.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ....................................... 23 Appendices Appendix A – Energy Benchmark Data Appendix B – AkWarm Commercial Reports Appendix C – Major Equipment List Appendix D – Energy Conservation Measures – Inlet View Elementary School Appendix E – Energy Conservation Measures – Portable Buildings Appendix F – Site Survey Photos Appendix G – Thermographic Photos Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 ii AkWarm No. CIRI&ANC&CAEC&10 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 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 iii AkWarm No. CIRI&ANC&CAEC&10 List of Figures Fig. 1 & Energy Audit Clients ........................................................................................................................ 1 Fig. 2 & Energy Benchmark Data .................................................................................................................. 1 Fig. 3 & Inlet View Elementary School location in Anchorage, Alaska – Google Maps .............................. 5 Fig. 4 & Inlet View Elementary School – Google Maps ................................................................................ 5 Fig. 5 & Inlet View Elementary Floor Plan .................................................................................................... 8 List of Tables Table 1 & Recommended Energy Conservation Measures, Inlet View Elementary School .......................... 2 Table 2 & Recommended Energy Conservation Measures, Portable Building .............................................. 4 Table 3 & Building History, Inlet View Elementary School .......................................................................... 9 Table 4 & Supply Fan Summary .................................................................................................................. 10 Table 5 & Energy Cost and Consumption Data ........................................................................................... 13 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 iv AkWarm No. CIRI&ANC&CAEC&10 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 1 AkWarm No. CIRI&ANC&CAEC&10 I. Executive Summary This report presents the findings of an energy audit conducted at Inlet 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 99515&3517 Email: mundt_calvin@asdk12.org Fig. 1 6 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 $30,003 Natural Gas $30,341 Total $60,344 2009& 2010 Average Energy Utilization Index (EUI) = 109.9 kBtu/sf 2009& 2010 Average Cost Index = 1.66 $/sf Fig. 2 6 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 2 AkWarm No. CIRI&ANC&CAEC&10 Table 1 6 Recommended Energy Conservation Measures, Inlet View Elementary School Executive Summary – Recommended ECMs Inlet View Elementary School (IVES) Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) IVES&1a Refrigerator s Replace residential & light commercial refrigerators/freezers older than 5 years old & & & <10 IVES&2b Boiler Shut Down Shut down boilers B&1 and B&2 during summer months $1,565 $800 32.03 0.5 IVES&3 Setback Thermostat: Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the School $2,111 $2,000 13.43 0.9 IVES&4 Above& Grade Wall: MPR Upper South Wall Add R&20 EIFS to exterior of existing wall (85 sf) $131 $1,311 2.22 10 IVES&5 Exterior Door: South and East Entry Doors Remove existing door and install standard pre&hung U&0.16 insulated door, including hardware. $111 $1,640 1.50 14.7 IVES&6 Mechanical Fan Motors Repair the fan motors in AHU&1, F&1, F&2, and F&3 with New Premium Efficiency Motors at time of next motor replacement $310 $1,900 1.42 6.1 IVES&7 Ventilation Add DDC control to place North Wing restroom exhaust fans on time schedule. $455 $4,000 1.41 8.8 IVES&8 Mechanical Pumps Replace Pumps P&5, P&7, P&8, P&9 and P&10 with new pumps with EC motors at time of next pump/motor replacement $1,101 $7,950 1.20 7.2 IVES&9 b,c HVAC Replace boiler B&2 with New Modulating High Efficiency Gas Boiler. Keep existing boiler B&1 as back up. $6,973 $100,000 1.12 14.4 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 3 AkWarm No. CIRI&ANC&CAEC&10 Executive Summary – Recommended ECMs Inlet View Elementary School (IVES) Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) IVES&10c HVAC And DHW Install Exhaust Stack Economizer on existing boilers B&1 and B&2 $1,246 $18,500 1.08 14.8 IVES&11 Lighting: Surface Mount HPS and Wallpack Replace with 2 LED 25W Module StdElectronic and Replace with 4 LED 25W Module StdElectronic $327 $4,800 1.05 14.7 IVES&12 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,088 $9,800 1.00 9 IVES&13 Lighting: Classrooms, Offices, MPR, Utility Spaces Replace or retrofit T12 fixtures with T8; install occupancy sensors $4,760 $64,850 1.04 13.6 IVES&14c Windows Replace existing window with U&0.30 vinyl window $1,884 $65,576 0.46 34.8 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 ECM&9 and ECM&10 are mutually exclusive and only one should be implemented. The ECMs are not intended to be implemented concurrently. For example, if ECM&9 is chosen and new high efficiency boilers are installed, then ECM&9 should not be completed because installing exhaust stack economizers is no longer applicable. d This item is recommended as a maintenance improvement, even though the SIR<1. See Section VIII for details. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 4 AkWarm No. CIRI&ANC&CAEC&10 Table 2 6 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 space. $597 $2,000 3.66 3.4 PB&2 Exterior Door: Portable Building & Doors Remove existing door and install standard pre&hung U&0.16 insulated door, including hardware. $99 $1,230 1.66 12.5 PB&3 Air Tightening Perform air sealing to reduce air leakage by 30%. $261 $2,000 1.14 7.7 PB&4 Window/Sky light: Portable Building & Single Pane Windows Replace existing window with U&0.22 vinyl window $200 $2,958 1.04 14.8 PB&5 Ceiling w/ Attic: Portable Building & Cold Roof Add R&30 fiberglass batts to attic with Standard Truss. $211 $4,340 1.01 20.6 PB&6 Lighting Replace T&12 lighting with T&8 lighting and install occupancy sensors $152 $2,350 1.00 15.5 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 5 AkWarm No. CIRI&ANC&CAEC&10 II. Introduction This energy audit was conducted at Inlet View Elementary School for AHFC and the Anchorage School District. The school is a 36,300 square foot (sf) campus that includes a 33, 420 sf school and three on&site portables with a combined area of 2,880 sf. 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 6 Inlet View Elementary School location in Anchorage, Alaska – Google Maps Fig. 4 6 Inlet View Elementary School – Google Maps Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 6 AkWarm No. CIRI&ANC&CAEC&10 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 9, 2012. The audit included 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. Colin Hopkins of the ASD Maintenance 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. Colin Hopkins, (907) 742&7630 (office) Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 7 AkWarm No. CIRI&ANC&CAEC&10 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 kitchens, 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 8 AkWarm No. CIRI&ANC&CAEC&10 V. Building Description Inlet View Elementary School is a small educational complex originally built in 1957, making it one of the oldest schools in the Anchorage School District. Many of the building’s envelope components, such as walls, windows and doors, are original and have insulating values significantly lower than current insulation standards. The school has a north and south wing that are utilized for classroom space. The Multi&Purpose Room (MPR), library and administration offices are located in the center of the school. Fig. 5 6 Inlet View Elementary Floor Plan The facility is operated from 7 a.m. until 4 p.m., five days a week during the school year. The school’s MPR and library are also used after 4pm for school sports and community activities. The school year runs from late August through late May. During the summer the school is typically unused, unless there is a summer school program in session. There are approximately 230 students and 35 staff that occupy Inlet View Elementary School. Inlet View Elementary has gone through a several changes throughout its history; including additions, interior renovations, exterior renovations, and re&roofing projects. A brief list of the major renovation projects and years completed are shown below. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 9 AkWarm No. CIRI&ANC&CAEC&10 Table 3 6 Building History, Inlet View Elementary School Inlet View Elementary – Building History* Date Addition or Renovation 1957 Original Construction. Design completed 1956. 1985 Addition of Classrooms 12 and 13 1990 Heating Improvements – New Boiler System 2008 Heating Improvements – Install new perimeter fin&tube heating systems in affected classrooms to replace existing radiant floor heating systems. (Rooms 1&7, 9&11, 14&17, 22, and MPR) 2009 Lighting Upgrade 2010 Re&Roof of Entire School *History is based on available drawings from ASD. V.I School Architectural Description The wall construction of Inlet View Elementary varies throughout the complex. Overall, the exterior walls have insulation values ranging from R&7 to R&9, which is significantly lower than typical R&values used in current construction and lower than current building code allows. The wall construction of the MPR is original 1957 construction with 1x6 cedar siding, ½” plywood, 2” x 6” wood studs at 16” on&center that are partially filled with only 2” fiberglass batt insulation inside. The composite R&value of the MPR wall assembly is R&8.7, as modeled in AkWarm. The wall construction of rooms 12 and 13 is original 1985 addition construction with 8” concrete block wall, 2”x2” wood furring with 2” rigid insulation, vapor barrier and drywall. The composite R&value of this wall assembly is R&9.3, as modeled in AkWarm. The rest of the school’s walls are original 1957 construction with 6” concrete block, 2”x2” wood furring with 2” blanket insulation, vapor barrier and drywall. There is approximately 13,751 sq ft of exterior wall area in the school. The floor construction of Inlet View Elementary is concrete slab on grade, with no under&floor insulation. All of the floor perimeters of the school, except rooms 12 & 13, have 1” rigid insulation that extends 2’ down along the concrete foundation wall. The floor perimeter of rooms 12 & 13 have 2” rigid insulation, extending 4’ down the foundation wall. The perimeter insulation throughout the school covers the edge of the floor slab. There is 32,476 sf of slab on grade floor area and a total floor area of 33,420 sf. The slab on grade floor area is less than the usable floor area of the building due to the school’s boiler room, which is located underneath the kitchen. The roof of Inlet View Elementary was replaced in 2010 with a new, fully adhered, exposed EPDM roofing membrane with R&32 minimum insulation below the membrane. There is 32,476 sf of roof envelope area. The roof area of the west entry way is not part of the heated building envelope and is therefore not included in the AkWarm model. There are two window types at the school: original wood frame windows and newer metal frame windows. All of the windows on the north side of the school are original wood frame, double pane windows with ¼” air space between the panes. Due to the age of these windows and significant air infiltration through the frames, the composite insulation value of these windows was modeled as R&0.8. There is 1,420 sq ft of original wood frame windows. The rest of the school has metal frame, double pane windows with ½” air space between the panes. An estimated insulating value of R&1.2 was given to these windows in the school. There is approximately 2,363 sq ft of metal frame window area. In the north wing, the classrooms on the northern side originally had clerestories made from glass block. These glass block clerestories have since been covered with siding on the exterior side. It is estimated that the 282 sf of glass block has an R&value of R&5.0. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 10 AkWarm No. CIRI&ANC&CAEC&10 There are two typical door types at the school: original solid wood doors and newer insulated metal doors. The south and east entry ways both are original solid wood doors with single pane half&lite windows. Both of these doors have significant infiltration occurring around the frame and were modeled to have an insulation value of R&1.0. There are also two original R&2.6 solid wood man doors in the MPR. The rest of the doors are insulated metal doors. The west entry door is an R&3.0 metal door with a double pane half& lite window. There are three R&5.0 metal man doors located around the perimeter of the school. The total door area of the school is 263 sq ft. V.II Mechanical Description Inlet View is heated with two identical Weil McLain, model 688, cast iron, sectional, gas&fired boilers. Each boiler is rated at 1,703 MBH input and 1,358 MBH output. The boilers were installed in 1990 and each are equipped with Gordon&Piatt Burners with Honeywell burner controllers. Duplex system pumps P&7 & P&8 and P&9 & P&10, send heated water to perimeter baseboard heaters, radiant floors, cabinet unit heaters and heating coils. A State Select standard natural draft, gas&fired water heater with a 73 gal storage tank provides hot water to the school. The domestic hot water is circulated by a Grundfos circulating pump (P&5). A complete list of all major equipment is located in Appendix C. Conditioned air is provided to the building using three supply air fans, F&1 through F&3, and with air handling unit AHU&1. Each supply fan and AHU&1 are equipped with a hot water heating coil. The below table describes the location, area served, and airflow of each supply fan. Table 4 6 Supply Fan Summary SUPPLY FAN SUMMARY Fan Name Fan Manufacturer Fan Location Area Served CFM F&1 Trane Fan Room 21 North Wing 10,000 F&2 Trane Fan Room 21 South Wing 8,000 F&3 Trane Fan Room 21 MPR 5,200 AHU&1 Trane Fan Room 21 Library 3,905 Supply fans F&1 through F&3 supply air to the majority of the building. In each classroom relief air is exhausted by a dedicated relief air fan; there are 12 total relief air fans in the building. Return air is vented into the two large school hallways, which act as the return air plenums. Return air is brought through the hallways and into the fan room housing F&1, F&2, and F&3, where it is mixed with outside air and filtered before being re&circulated. The supply fans and relief fans operate continuously while the building is in occupied mode and are off during unoccupied mode. It was reported that while the relief fans were off during unoccupied mode, the dampers of the relief air fans do not close properly, allowing significant cold air to drop into the classrooms. Restrooms are exhausted with rooftop exhaust fans, which were reported to be running continuously year round. The school’s building energy management and control system is a mixture of older pneumatic controls and newer direct digital controls (DDC). The hybrid system uses electronic transducers to control pneumatic actuators. The pneumatic controls are operated by an air compressor utilizing a 1.5 HP motor. The system has been well maintained and appeared to be in good working order during the site visit. Pneumatic systems, however, are considered outdated due to the vast improvements in monitoring, control and operating efficiencies available from the modern genre of electronic control systems. A Siemens Apogee DDC control system is utilized to operate the boiler, heating water pumps, and supply Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 11 AkWarm No. CIRI&ANC&CAEC&10 fans. There is a night&set back controlled by the DDC system that lowers building temperatures to 65F during unoccupied mode. V.III Electrical Description Inlet View Elementary School is served by an 800A, 120/208V, 3&phase, 4&wire, underground service. The school does not have a generator. Typical classrooms are illuminated by a mixture of surface mounted wraparound, suspended wraparound, surface mounted parabolic, light fixtures equipped with two or three lamp 40 watt (W) T&12 fluorescent lamps. The fixtures were originally equipped with magnetic ballasts and approximately one third have been replaced with electronic ballasts, as the magnetic ballasts have failed. Typical classroom lighting control is three manual switches, controlling three zones in the classroom. The zones run perpendicular to the corridors and are separated by exposed beams. Some classrooms have bi&level lighting control. All classrooms have access to natural light. The typical classroom has one entire wall of windows. Classrooms on the north side of the building also have a 4' clearstory built of glass block, but it has been covered in sheathing. Lighting levels in the classrooms are typically below with current Illumination Engineering Society of North America (IESNA) illumination and ASD standards. Measured levels ranged from 15&25 foot&candles. The target levels listed in those standards are 30&50 foot&candles. Corridor lighting was upgraded in 2009. It consists of two&lamp T8 fixtures with electronic ballasts controlled by a central contactor, connected to the security system. Corridor lighting levels averaged 25 foot&candles, the recommended level. The multipurpose room lighting was replaced in 2009. It is illuminated by four lamp T5HO light fixtures controlled by manual switches. Lighting levels averaged 25 foot&candles. All offices, storage areas, utility rooms, are illuminated by two or four lamp T12 fixtures. The fixtures were originally equipped with magnetic ballasts and approximately one third have been replaced with electronic ballasts, as the magnetic ballasts have failed. Lighting levels were generally adequate. Exterior light fixtures all utilize high pressure sodium (HPS) sources. There are (5) 400W HPS pole mounted "shoebox" type area lighters illuminating the parking lot and driveway. There are (6) 400W HPS pole mounted flood lights illuminating the skating rink. There are (2) 100W HPS canopy lights over the entrances. There are (4) 100W HPS wallpacks and (2) 250W HPS wall mounted flood lights around the perimeter of the building. All exterior lighting is controlled by contactors located in the main electrical room based on signals from a central photocell and the security system. Parking lot lights are shut&off when the security system is armed. 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, printers, and a laminator (which is turned off when not in use). V.IV Outbuildings Description There are three portables at Inlet View Elementary that are used for school and after school activities. Two of the portables are used for classrooms and the remaining portable is used for before and after school programs and for band. On average, the portables are used approximately 40 hours per week. The portables use electricity for heating, lighting and other plug loads. Due to the fact that the three on&site portables have similar building envelope construction and heating equipment, only one AkWarm model was created to model the average characteristics of all three portables. The results and recommended Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 12 AkWarm No. CIRI&ANC&CAEC&10 ECMs generated by this single portable AkWarm model should be applied to all of the three portable buildings. Each portable has 2”x4” wood stud wall construction at 16” on&center with R&11 fiberglass batt insulation in between the studs. The exterior face of the wall is T1&11 siding with drywall on the interior side of the wall. Interior and exterior wall height is 9’ under the roof eaves, and the end&walls vary in height from 9’ at the eaves to 11’ at the roof peak in the center of the end wall. One portable typically has 1,170 sf of exterior wall area. The portables have above grade floors resting on sleepers. Plywood skirting protects the sleepers and floor construction from weather. The floor construction is plywood flooring resting on 2”x8” wood joists. It is estimated that the floor has R&19 fiberglass batt insulation. One portable typically has 960 sf of floor area. The portables are all covered by cold roofs, with shingles covering plywood decking. It is estimated that the roof insulation is R&19 fiberglass batt insulation. One portable typically has 990 sf of roof area. The windows of the portables include both single pane (R&1.1) and double pane (R&1.8) wood windows. There are typically two metal doors per portable, with estimated insulation values of R&1.7. All three portables are heated with electric resistance perimeter baseboards and electric unit heaters. The electric baseboard 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. 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. The lighting in the portables is typically 2 lamp and 4 lamp, 4ft long, T&12 light fixtures with magnetic ballasts. There are three 2 lamp fixtures and twelve 4 lamp fixtures. Both of these fixtures are candidates for replacement with newer energy efficient T&8 light fixtures. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 13 AkWarm No. CIRI&ANC&CAEC&10 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. Municipal Light and Power (ML&P) provides the electricity and ENSTAR 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 space heater 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 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 5 6 Energy Cost and Consumption Data Energy Cost and Consumption Data 2009 2010 Average Electric $0.13/kWh $0.13 /kWh $0.13 /kWh Natural Gas $1.01 /CCF $0.90 /CCF $0.96 /CCF Total Cost $63,041 $57,647 $60,344 ECI $1.74 /sf $1.59 /sf $1.66 /sf Electric EUI 23.2 kBtu/sf 21.7 kBtu/sf 22.4 kBtu/sf Natural Gas EUI 87.5 kBtu/sf 87.4 kBtu/sf 87.4 kBtu/sf Building EUI 110.6 kBtu/sf 109.1 kBtu/sf 109.9 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 36,300 sf, which includes 33,420 sf of the school and 2,880 sf of portables. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 14 AkWarm No. CIRI&ANC&CAEC&10 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 15 AkWarm No. CIRI&ANC&CAEC&10 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 16 AkWarm No. CIRI&ANC&CAEC&10 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# IVES61 6 Replace residential & light commercial refrigerators/freezers older than 5 years Annual Energy Savings Installed Cost SIR Payback (years) & & & <10 years Due to advances in refrigerators in the previous five years, new Energy Star residential&type and light commercial&type refrigerators and freezers are much more efficient and result in viable energy savings. Built&in refrigerators and freezers should be evaluated independently. 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# IVES62 – Shutdown Boilers During Summer Months Annual Energy Savings Installed Cost SIR Payback (years) $1,565 $800 32.03 0.5 The school’s two gas&fired boilers operate year&round, even during the summer when limited heating needs are required. By turning off the boilers from early 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, it appears that Inlet View Elementary does not contain grooved&joint couplings and leaks should not be an issue when boilers are shut down seasonally. Inlet View Elementary also has a standalone gas&fired domestic hot water heater, allowing domestic hot water to be produced while the two Weil&McLain boilers are shut down. The cost for this ECM is for the labor required to complete the annual shutdown. 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 the Appendix D. ECM# IVES63 – Setback Thermostat in All Building Spaces Annual Energy Savings Installed Cost SIR Payback (years) $2,111 $2,000 13.43 0.9 Currently, there is a night&set back schedule that lowers building temperatures to 65F during unoccupied mode. However, even greater energy savings exist by reducing the room temperature of the building spaces further to 60F 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 program a night setback. The 60F night&set back is feasible; however it may require that that other DDC setpoints be changed, such as the low&temp alarm. This ECM is a compilation of items 1 and 3 in Appendix D, which are intended to be implemented concurrently. Details of the individual items are shown in Appendix D. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 17 AkWarm No. CIRI&ANC&CAEC&10 ECM # IVES64 –Insulate Wall Area on South Face of MPR Annual Energy Savings Installed Cost SIR Payback (years) $131 $1,311 2.22 10 The south facing exterior wall of the MPR extends above the roofline of the rest of the school. This wall used to have south clerestory windows that allowed natural light to enter the MPR. Currently, these windows have been replaced with a corrugated plastic wall which is estimated to have an R&value of R&1. The corrugated plastic wall area is 85 sf. Insulating this wall area with an R&20 Exterior Insulation Finish System (EIFS) will reduce heat loss and save approximately $131 in natural gas annually. Details of the ECM are shown in item 4 in Appendix D. ECM # IVES65 – Replace South and East Entry Doors Annual Energy Savings Installed Cost SIR Payback (years) $111 $1,640 1.50 14.7 The south and east entry doors are original solid wood doors. It was reported that the doors do not close properly during the winter and contribute to significant air leakage. It is recommended that these doors be replaced with new insulated entry doors (U&0.16). New weather&stripping should be installed on the new door during replacement. Details of the ECM are shown in item 5 in Appendix D. ECM # IVES66 – Repair Motors with NEMA premium efficiency motors Annual Energy Savings Installed Cost SIR Payback (years) $310 $1,900 1.42 6.1 Replacing fan motors for AHU&1, F&1, F&2 and F&3 with new NEMA premium efficiency motors will offer significant energy savings. New high efficiency motors have reduced electrical demands which create significant energy savings for larger horsepower (HP) motors. Replacing these existing motors while they are still functional will result in a high replacement cost with a longer payback. However, upgrading these motors to high efficiency motors when the existing motors are in need of repair will offer a more reasonable payback because the marginal cost of the high efficiency pump motor over the standard efficiency motor replacement is only a $1,900 repair cost. This ECM is a compilation of items 6, 7, 9 and 10 as modeled in AkWarm and are intended to be implemented concurrently. Details of the individual items are shown in Appendix D. ECM # IVES67 – Add DDC Control to North Wing Restroom Exhaust Fans Annual Energy Savings Installed Cost SIR Payback (years) $455 $4,000 1.41 8.8 Currently, the restroom exhaust fans for the north wing restrooms run constantly. Automatically shutting the fans down when the building is in unoccupied mode will save electricity and reduce the amount of cold air infiltrating the school. It is recommended that the fans be controlled by the DDC system so that the fans can be automatically scheduled. Details of the ECM are shown in item 8 in Appendix D. ECM # IVES68 – Repair Burnout Motors with EC motors Annual Energy Savings Installed Cost SIR Payback (years) $1,101 $7,950 1.20 7.2 Replacing pumps P&7, P&8, P&9, P&10 and domestic hot water pump P&5 with new electronically commutated motors will save significant amounts of electricity. New, high efficiency pumps with Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 18 AkWarm No. CIRI&ANC&CAEC&10 electronically commutated (EC) motors have integral speed controls which read system demand, allowing the pump to slow down with significant electrical savings. EC motors also do not require DDC connectivity. Replacing the existing pumps with new pumps with EC motors now (while the existing motors are still functional) will result in a high replacement cost. However, upgrading to pumps with EC motors when the existing pumps fail and are in need of repair will offer a much better payback. The marginal cost of choosing a high efficiency EC motor over the standard efficiency replacement motor for the above pumps is only a $7,950 repair cost, since the motor needs to be replaced anyway. This ECM is a compilation of items 2, 12, and 17 as modeled in AkWarm which are intended to be implemented concurrently. Details of the individual items are shown in Appendix D. ECM # IVES69 – Replace Boiler B62 with New High Efficiency Boiler Annual Energy Savings Installed Cost SIR Payback (years) $6,973 $100,000 1.12 14.4 Significant natural gas can be saved by replacing boiler B&2 with a new modulating high efficiency boiler. To save costs, the existing boiler B&1 would not be replaced and would be kept as the back&up boiler. 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 at lower return water temperatures and reduce boiler on/off cycling, which significantly increases the boiler’s efficiency. Replacing the existing boiler with a new high efficiency boiler (92% average combustion efficiency and high turn&down ratio) at a cost of $100,000 will give an SIR of 1.12, and an annual savings of $6,973. 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 the Appendix D. Note: ECM9 and ECM10 are mutually exclusive and only one should be implemented. The ECMs are not intended to be implemented concurrently. For example, if ECM9 is chosen and new high efficiency boilers are installed, then ECM9 should not be completed because installing exhaust stack economizers is no longer applicable. ECM # IVES610 – Install Exhaust Stack Economizer Annual Energy Savings Installed Cost SIR Payback (years) $1,246 $18,500 1.08 14.8 Installing one exhaust stack economizer on the combined exhaust stack of the two 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. A single exhaust stack economizer can recover heat from either boiler as long as it is installed within the boiler’s combined exhaust stack. Details of the ECM are shown in item 14 in Appendix D. Note: ECM9 and ECM10 are mutually exclusive and only one should be implemented. The ECMs are not intended to be implemented concurrently. For example, if ECM9 is chosen and new high efficiency boilers are installed, then ECM9 should not be completed because installing exhaust stack economizers is no longer applicable. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 19 AkWarm No. CIRI&ANC&CAEC&10 ECM # IVES611 – Upgrade Building Mounted Exterior Lighting Annual Energy Savings Installed Cost SIR Payback (years) $327 $4,800 1.05 14.7 The building mounted exterior HPS lighting at the school consists of two 100W HPS canopy fixtures and four 100W wallpacks. This ECM would replace the 100W lamps with 25W LED fixtures. It is assumed that the wiring can be reused. This measure is modeled as items 15 & 16 in Appendix D. See appendix D for more information. ECM # IVES612 – Perform Air Sealing to Reduce Air Leakage by 20% Annual Energy Savings Installed Cost SIR Payback (years) $1,088 $9,800 1.00 9 Unconditioned infiltration air, leaking through doors, windows, and other building envelope penetrations contributes to the heating required in the building. Methods to decrease the infiltration into the building include: sealing around roof and wall penetrations with caulking and insulation, gasketing mechanical louvers or hoods, providing gaskets to all exterior cover plates, and adding weather stripping around exterior doors. To achieve a viable economic benefit, $9,800 can be invested and still achieve an SIR > 1 by reducing air leakage by 20%. Details of the ECM are shown in item 18 in Appendix D. During the site visit several specific areas were observed to have significant infiltration problems: · There are 12 classroom relief air fans and one kitchen exhaust fan that were reported to have dampers that do not close properly when the fans are not running. It is recommended that the dampers for these fans be replaced with new insulated, thermally broken dampers that seal air tight when in the closed position. · There are two existing coal dump hatches that were utilized in the past to move coal from the loading dock to the coal storage area, adjacent to the below&grade boiler room. These now un& used coal hatches are not well sealed and allow cold air to seep into the building envelope. It is recommended that these un&used coal hatches be sealed and insulated. · Air seal around existing windows and install new weather&stripping on exterior doors. ECM # IVES613 – Replace or Retrofit T12 Fluorescent Light Fixtures, Install Occupancy Sensors Annual Energy Savings Installed Cost SIR Payback (years) $4,760 $64,850 1.04 15.0 This measure would replace all remaining T12 light fixtures in the school, except for the light fixtures in the MPR stage area, with more efficient T8 sources and install occupancy sensors in all classrooms and restrooms. Previous energy conservation projects executed at this school upgraded T12 light fixtures in corridors and to T8 sources. Elimination of all T12 lamps will simplify maintenance. This measure would replace the remaining T12 light fixtures in the classrooms, offices, storage spaces, and utility spaces. It includes the following: replacing (171) 3&lamp, T12 fixtures in classrooms (which are currently under illuminated) one for one with 3&lamp T8 fixtures; replacing (113) 2&lamp, T12 fixtures in the classrooms (which are currently under illuminated) one for one with 3&lamp T8 fixtures; retrofitting (27) 2&lamp, 2'x2' U&tube T12 fixtures in the classrooms with three 17W, 2' T8 lamps; replacing (13) 2&lamp, T12 fixtures in the restrooms one for one with 2&lamp T8 fixtures; replacing (34) 4&lamp, T12 fixtures in the offices one for one with 3&lamp T8 fixtures; retrofitting (4) 4&lamp, T12 fixtures in mechanical spaces with (4) T8 lamps; retrofitting (2) 1&lamp, T12 fixtures in mechanical spaces with (1) T8 lamp; retrofitting (18) 2&lamp, and Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 20 AkWarm No. CIRI&ANC&CAEC&10 T12 fixtures in mechanical spaces with (2) T8 lamps; removing (2) 4&lamp T12 fixtures with emergency ballasts in the MPR and replacing them with (2) "bug&eye" emergency lighting units. This measure would also include the installation of approximately (49) occupancy sensors in classrooms and restrooms. This measure is an aggregate of multiple items are modeled in AkWarm separately, but are intended to be implemented concurrently. This measure includes individual items that have an SIR of less than one, but has a combined SIR of greater than one. This measure increases lighting levels in all areas identified as deficient to recommended levels. This measure excludes (10) T12 light fixtures in the stage area of the multipurpose room. It is not occupied often enough to payback based solely on energy savings. However, it is recommended that this space also be upgraded to T8 to simplify maintenance. This measure is modeled as items 11, 13, 20, 21, 22, 23, 24, 25, 31 and 32 in Appendix D. See Appendix D for more information. ECM # IVES614 – Replace North Facing Original Wood Windows Annual Energy Savings Installed Cost SIR Payback (years) $1,884 $65,576 0.46 34.8 The windows on the north face of the school building have wood frames and were installed during original construction. Aging wood frame windows often have poor insulating values and are a source of significant air leakage. Increased maintenance costs are also present with aging windows as the seals wear and moisture causes them to warp, crack, or stick. Due to the high cost of replacement windows, the payback for this ECM is long. However, replacement windows with energy efficient thermal&panes (U& 0.30) will offer significant energy savings and reduce maintenance costs. See item 28 in Appendix D for more information. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 21 AkWarm No. CIRI&ANC&CAEC&10 VIII.II Outbuildings Energy Conservation Measures There are three portable buildings that exist on&site and are connected to the electrical service of Inlet View Elementary School. A typical AkWarm model was created to model the typical portable, due to similarities in construction type and heating systems. The following ECM savings and installed costs are for one portable building. Multiply the results by three to obtain savings and costs for all three portables combined. ECM #PB61 – Setback Thermostat Annual Energy Savings Installed Cost SIR Payback (years) $597 $2,000 3.66 3.4 Significant energy savings exist by reducing the room temperature of the portable buildings to 60F during unoccupied times. However, due to the fact that each portable building has many 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 temperatures in the portables are typically much higher than required. Also, temperatures cannot be set back during unoccupied times. It is recommended that a central programmable thermostat be installed in the portable building that can turn on or off the perimeter electric baseboards to control occupied and unoccupied temperature set points. Details of the individual ECM are shown in item 1 in Appendix E. ECM #PB62 – Replace Exterior Doors Annual Energy Savings Installed Cost SIR Payback (years) $99 $1,230 1.66 12.5 The portable buildings each have 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 perimeter weather stripping to reduce air infiltration. Details of the individual ECM are shown in item 2 in Appendix E. ECM #PB63– Seal Building Envelope and Reduce Infiltration by 30% Annual Energy Savings Installed Cost SIR Payback (years) $261 $2,000 1.14 7.7 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 electricity being used by the electric heaters. Reducing infiltration by air sealing the building envelope will produce energy savings. 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 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, $2,000 can be invested and still achieve an SIR > 1 by reducing air leakage by 30%. Details of the individual ECM are shown in item 3 in Appendix E. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 22 AkWarm No. CIRI&ANC&CAEC&10 ECM # PB64 – Replace Single Pane Original Wood Windows Annual Energy Savings Installed Cost SIR Payback (years) $200 $2,958 1.04 14.8 Some of the portable windows are single pane, wood frame windows, which have poor insulating values and significant air leakage through the wood frames. Replacing these windows with a U&0.22 window will reduce electricity required to heat the building. Details of the individual ECM are shown in item 5 in Appendix E. ECM #PB65 – Add Roof Insulation to Cold Roof Annual Energy Savings Installed Cost SIR Payback (years) $211 $4,340 1.01 20.6 Adding additional R&19 fiberglass batt insulation to the roof of the portables to make an R&38 roof is recommended. This can be accomplished by accessing the attic space in the portable’s cold roof. Installing an additional layer of R&19 insulation will reduce the amount of electricity used for heating the building. Details of the individual ECM are shown in item 6 in Appendix E. ECM # PB 66 – Replace T612 Lighting with New T68 Lighting Annual Energy Savings Installed Cost SIR Payback (years) $152 $2,350 1.00 15.5 The lighting in the portables is 2 lamp and 4 lamp, 4ft long, T&12 light fixtures with magnetic ballasts. Replacing the existing lighting to T&8 fixtures with occupancy sensors and programmable start ballasts is recommended. Completing this lighting retrofit will save $152 annually and have an SIR of 1.00. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 23 AkWarm No. CIRI&ANC&CAEC&10 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. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix A Energy Benchmark Data First Name Last Name Middle Name Phone Steven Golab 348-5132 State Zip AK 99517 Monday- Friday Saturday Sunday Holidays 8-4:30 Average # of Occupants During 236 Renovations Date REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner MOA Building Name/ Identifier Building Usage Building Square Footage Date Municipal Government/Subdivision Facility Owned By Anchorage School District 07/22/11 1957 27387 SF Original Structure 36,300 Year Built Facility Address Building Type Mixed Community Population Facility City 1957 Inlet View Elementary Education - K - 12 Facility Zip Golab_Steven@asdk12.org 1219 N St Anchorage Primary Operating Hours Contact Person City 261,500 99517 Email Anchorage Details Mailing Address PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton Other energy sources? Describe 1972 1900 SF IMC 1957 27387 SF Original Structure 2. Provide utilities bills for the most recent two-year period for each energy source you use. 1985 3133 SF Classrooms 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. Total = Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Buiding Size Input (sf) =36,300 2009 Natural Gas Consumption (Therms)31,748.00 2009 Natural Gas Cost ($)32,014 2009 Electric Consumption (kWh)246,241 2009 Electric Cost ($)31,027 2009 Total Energy Use (kBtu)4,015,221 2009 Total Energy Cost ($)63,041 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 87.5 2009 Electricity (kBtu/sf)23.2 2009 Energy Utilization Index (kBtu/sf)110.6 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf)0.88 2009 Electric Cost Index ($/sf)0.85 2009 Energy Cost Index ($/sf)1.74 2010 Natural Gas Consumption (Therms)31,714.00 2010 Natural Gas Cost ($)28,668 2010 Electric Consumption (kWh)231,2972010 Electric Consumption (kWh)231,297 2010 Electric Cost ($)28,979 2010 Total Energy Use (kBtu)3,960,817 2010 Total Energy Cost ($)57,647 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf)87.4 2010 Electricity (kBtu/sf)21.7 2010 Energy Utilization Index (kBtu/sf)109.1 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf)0.79 2010 Electric Cost Index ($/sf)0.80 20010 Energy Cost Index ($/sf)1.59 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View ElementaryNatural GasBtus/CCF =100,000Provider Customer # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($)Enstar NGC304 Jan-09 01/09/09 02/10/09324,5114,511$4,584$1.02Enstar NGC304 Feb-09 02/10/09 03/09/09273,6693,669$3,740$1.02Enstar NGC304 Mar-09 03/09/09 04/09/09313,3323,332$3,406$1.02Enstar NGC304 Apr-09 04/09/09 05/08/09292,3122,312$2,382$1.03Enstar NGC304/329 May-09 05/08/09 06/10/09331,5851,585$1,651$1.04Enstar NGC329 Jun-09 06/10/09 07/10/09301,2121,212$1,278$1.05Enstar NGC329 Jul-09 07/10/09 08/11/09321,1331,133$1,200$1.06Enstar NGC329 Aug-09 08/11/09 09/11/09311,1981,198$1,265$1.06Enstar NGC329 Sep-09 09/11/09 10/12/09311,6231,623$1,690$1.04Enstar NGC329 Oct-09 10/12/09 11/09/09282,4992,499$2,575$1.03Enstar NGC329 Nov-09 11/09/09 12/08/09294,1004,100$4,179$1.02Enstar NGC329 Dec-09 12/08/09 01/11/10344,5744,574$4,064$0.89Enstar NGC329 Jan-10 01/11/10 02/10/10304,4164,416$3,717$0.84Enstar NGC329 Feb-10 02/10/10 03/10/10283,4243,424$2,896$0.85Enstar NGC329 Mar-10 03/10/10 04/12/10333,2943,294$2,807$0.85Enstar NGC329 Apr-10 04/12/10 05/10/10282,5412,541$2,190$0.86Enstar NGC329 May-10 05/10/10 06/08/10291,6041,604$1,713$1.07Enstar NGC329Jun-1006/08/1007/09/1031336336$348$1.04Enstar NGC329Jun-1006/08/1007/09/1031336336$348$1.04Enstar NGC329 Jul-10 07/09/10 08/10/10 32 758758$875$1.15Enstar NGC329 Aug-10 08/10/10 09/09/10301,5381,538$1,596$1.04Enstar NGC329 Sep-10 09/09/10 10/11/10322,2162,216$2,118$0.96Enstar NGC329 Oct-10 10/11/10 11/08/10282,8822,882$2,688$0.93Enstar NGC329 Nov-10 11/08/10 12/08/10303,7713,771$3,385$0.90Enstar NGC329 Dec-10 12/08/10 01/11/11344,9344,934$4,335$0.88Jan - 09 to Dec - 09 total:31,74831,7480.00$32,014$0Jan - 10 to Dec - 10 total:31,71431,7140.00$28,668$0$1.01$0.90Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 $2,000 $2,500 $3,000 $3,500 $4,000 $4,500 $5,000 2,0003,0004,0005,0006,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Inlet View Elementary - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($)$0 $500 $1,000 $1,500 01,000Jan-09 Mar-09 May-09 Jul-09 Sep-09 Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10Natural Gas Consumption (Therms)Date (Mon - Yr)Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)ML&P 23775997 Jan-09 1/8/2009 2/9/20093226,52490580.64$2,640$0.10$955.58ML&P 23775997 Feb-09 2/9/2009 3/9/20092823,26079474.00$4,912$0.21$876.90ML&P 23775997 Mar-09 3/9/2009 4/8/20093023,64580774.24$2,571$0.11$879.74ML&P 23775997 Apr-09 4/8/2009 5/8/20093021,90974868.00$2,454$0.11$805.80ML&P 23775997 May-09 5/8/2009 6/8/20093117,85260969.44$2,069$0.12$822.86ML&P 23775997 Jun-09 6/8/2009 7/9/20093110,94737464.50$1,539$0.14$764.47ML&P 23775997 Jul-09 7/9/2009 8/10/20093211,12438064.50$1,737$0.16$764.47ML&P 23775997 Aug-09 8/10/2009 9/9/20093016,68056965.60$2,218$0.13$777.36ML&P 23775997 Sep-09 9/9/2009 10/8/20092920,35069572.30$2,465$0.12$856.99ML&P 23775997 Oct-09 10/8/2009 11/9/20093223,07278777.76$2,815$0.12$921.46ML&P 23775997 Nov-09 11/9/2009 12/8/20092925,35586580.80$2,955$0.12$957.48ML&P 23775997 Dec-09 12/8/2009 1/7/20103025,52387183.20$2,652$0.10$985.92ML&P 23775997 Jan-10 1/7/2010 2/5/20102926,87191777.20$2,686$0.10$914.82ML&P 23775997 Feb-10 2/5/2010 3/9/20103222,82877975.52$2,660$0.12$894.91ML&P 23775997 Mar-10 3/9/2010 4/8/20103023,92081676.64$2,907$0.12$908.18ML&P 23775997 Apr-10 4/8/2010 5/7/20102921,85974676.40$2,734$0.13$905.34ML&P 23775997 May-10 5/7/2010 6/8/20103217,08158366.56$2,282$0.13$820.68ML&P23775997Jun-106/8/20107/8/2010309,18331366.56$1,416$0.15$820.68ML&P23775997Jun-106/8/20107/8/2010309,18331366.56$1,416$0.15$820.68ML&P 23775997 Jul-10 7/8/2010 8/9/20103210,10034566.56$1,750$0.17$820.68ML&P 23775997 Aug-10 8/9/2010 9/8/20103016,30055666.56$2,235$0.14$820.68ML&P 23775997 Sep-10 9/8/2010 10/7/20102919,32365966.56$2,390$0.12$820.68ML&P 23775997 Oct-10 10/7/2010 11/5/20102920,45869866.56$2,384$0.12$820.68ML&P 23775997 Nov-10 11/5/2010 12/7/20103220,67270669.92$2,671$0.13$862.11ML&P 23775997 Dec-10 12/7/2009 1/7/2009-33422,70277567.52$2,864$0.13$832.52Jan - 09 to Dec - 09 total:246,2418,404874.98$31,027$10,369Jan - 10 to Dec - 10 total:231,2977,894842.56$28,979$10,242$0.13$0.13Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 $2,000$3,000$4,000$5,000$6,00010,00015,00020,00025,00030,000Electric Cost ($)Electric Consumption (kWh)Inlet View Elementary - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$1,00005,000Jan-09Mar-09May-09Jul-09Sep-09Nov-09Jan-10Mar-10May-10Jul-10Sep-10Nov-10Date (Mon - Yr)Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix B AkWarm Commercial Reports Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 6/12/2012 3:54 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Inlet View ES Auditor Company: Coffman Engineers Address: 1219 N Street Auditor Name: Walter Heins, PE City: Anchorage Auditor Address: 800 F Street Anchorage, AK 99501 Client Name: Steven Golab Client Address: Auditor Phone: (907) 276&6664 Auditor FAX: (907) 276&5042 Client Phone: (907) 348&5132 Auditor Comment: Client FAX: Design Data Building Area: 33,420 square feet Design Heating Load: Design Loss at Space: 1,102,031 Btu/hour with Distribution Losses: 1,102,031 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 1,679,925 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 0 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: Anchorage ML&P & Commercial & Sm Natural Gas Provider: Enstar Natural Gas & Commercial & Sm Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.960/ccf Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary 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 $28,942 $0 $2,724 $14,559 $0 $19,838 $0 $0 $513 $0 $66,576 With Proposed Retrofits $22,991 $0 $2,673 $7,862 $0 $18,024 $0 $0 $159 $0 $51,709 SAVINGS $5,951 $0 $51 $6,696 $0 $1,814 $0 $0 $354 $0 $14,867 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary $0 $2,000 $4,000 $6,000 $8,000 $10,000 $12,000 $14,000FloorWall/DoorWindowCeilingAirExistingRetrofitAnnual Space Heating Cost by Component Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Natural Gas (Right) Consumption (Orange). Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange). Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Monthly Modeled Consumption (Blue compared to Actual Natural Gas Consumption (Orange) . Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 2/17/2012 2:43 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Inlet View Elementary & Portable Building Auditor Company: Coffman Engineers, Inc. Address: 1219 N st. Auditor Name: Walter Heins, PE City: Anchorage Auditor Address: 800 F Street Anchorage, AK 99501 Client Name: Steven Golab Client Address: Auditor Phone: (907) 276&6664 Auditor FAX: (907) 276&5042 Client Phone: (907) 348&5132 Auditor Comment: Client FAX: Design Data Building Area: 960 square feet Design Heating Load: Design Loss at Space: 24,472 Btu/hour with Distribution Losses: 24,472 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 37,308 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 0 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& Residential Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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 $2,884 $0 $0 $759 $0 $41 $0 $0 $0 $0 $3,684 With Proposed Retrofits $1,403 $0 $0 $154 $0 $41 $0 $0 $0 $0 $1,598 SAVINGS $1,481 $0 $0 $606 $0 $0 $0 $0 $0 $0 $2,087 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings $0$1,000$2,000$3,000$4,000Existing RetrofitSpace HeatingOther ElectricalLightingAnnual Energy Costs by End Use Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix C Major Equipment List Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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 688 CAST IRON GAS&FIRED 1,703 MBH INPUT 1,358 MBH OUTPUT ≈ 79% ¾ HP 30 8 B&2 BOILER RM BUILDING HEATING WEIL&MCLAIN 688 CAST IRON GAS&FIRED 1,703 MBH INPUT 1,358 MBH OUTPUT ≈ 79% ¾ HP 30 8 WH&1 BOILER RM DOMESTIC HOT WATER HEATER STATE SELECT PR675NRRS GAS&FIRED STANDARD UPDRAFT 75 MBH INPUT 73 GAL 48% ENERGY FACTOR & 15 7 P&5 BOILER RM DHW PUMP GRUNDFOS UP 25&64SF INLINE & NEMA STANDARD 180W 10 2 P&7 BOILER RM SOUTH HEATING WATER CIRC ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 104 GPM 40’ 81.5% 2 HP 10 0 P&8 BOILER RM SOUTH HEATING WATER CIRC DUPLEX ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 104 GPM 40’ 81.5% 2 HP 10 0 P&9 BOILER RM NORTH HEATING WATER CIRC ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 70 GPM 40’ 80% 1.5 HP 10 0 P&10 BOILER RM NORTH HEATING WATER CIRC DUPLEX ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 70 GPM 40’ 80% 1.5 HP 10 0 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) AHU&1 RM 35 LIBRARY VENTILATION PACE BALDOR MOTOR CENTRI&FUGAL 3,905 CFM 2” 82% 3 HP 25 3 FAN&1 RM 21 NORTH VENTILATION WESTERN BLOWER CO. LEESON MOTOR CENTRI&FUGAL 10,000 CFM 1” 82% 3 HP 25 3 FAN&2 RM 21 SOUTH VENTILATION WESTERN BLOWER CO. GENERAL ELECTRIC MOTOR CENTRI&FUGAL 8,000 CFM 1” 75% 3 HP 25 0 FAN&3 RM 21 MPR VENTILATION WESTERN BLOWER CO. GENERAL ELECTRIC MOTOR CENTRI&FUGAL 5,200 CFM 1” 75% 1.5 HP 25 0 & ROOF RELIEF AIR FANS FOR INDIVIDUAL CLASSROOMS NO NAMEPLATE AO SMITH MOTOR RELIEF AIR FAN 10 FANS TOTAL ≈80% ¼ HP 25 5 & ROOF NORTH WING REST&ROOMS EXHAUST FANS (2 TOTAL) NO NAMEPLATE NOT ACCESSIBLE AXIAL ≈250 CFM ≈80% ¼ HP 25 0 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix D Energy Conservation Measures Inlet View Elementary Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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: Classrooms Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classrooms space. $1,971 $1,000 25.44 0.5 2 Other Electrical & Power Retrofit: DHW PUMP#5 Replace with New EC Pump $62 $150 3.42 2.4 3 Setback Thermostat: MPR (Multi&Purpose Room) Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the MPR (Multi&Purpose Room) space. $191 $1,000 2.46 5.2 4 Above&Grade Wall: MPR Upper South Wall Add R&20 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $131 $1,311 2.32 10 5 Exterior Door: South and East Entry Doors Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $111 $1,640 1.58 14.7 6 Lighting & Combined Retrofit: Classrooms (w/ Bilevel Control) Replace with 171 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching, Multi&Level Switch $3,247 $31,150 1.45 9.6 7 Ventilation Add DDC control to place North Wing restroom exhaust fans on time schedule. $456 $4,000 1.37 8.8 8 Other Electrical & Power Retrofit: AHU&1 MOTOR Replace with New Premium Efficiency Motor $81 $500 1.35 6.2 9 Other Electrical & Power Retrofit: FAN F&1 MOTOR Replace with New Premium Efficiency Motor $81 $500 1.35 6.2 10 Other Electrical & Power Retrofit: FAN F&2 MOTOR Replace with New Premium Efficiency Motor $72 $450 1.33 6.2 11 Other Electrical & Power Retrofit: FAN F&3 MOTOR Replace with New Premium Efficiency Motor $72 $450 1.33 6.2 12 Other Electrical & Combined Retrofit: PUMP P&7 & P&8 Replace with 2 New EC Pumps for P&7 & P&8 and Remove Manual Switching $591 $4,000 1.22 6.8 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 13 HVAC And DHW Install Exhaust Stack Economizer for B&1 and B&2 $1,310 $18,500 1.18 14.1 14 Lighting & Power Retrofit: Mechanical Replace with 4 FLUOR (4) T8 4' F32T8 32W Standard (2) Program HighEfficElectronic $33 $400 1.16 12 15 Lighting & Power Retrofit: Wallpack Replace with 4 LED 25W Module StdElectronic $218 $3,200 0.99 14.7 16 Lighting & Power Retrofit: Surface Mount HPS Replace with 2 LED 25W Module StdElectronic $109 $1,600 0.99 14.7 17 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,090 $9,800 0.99 9 18 Other Electrical & Combined Retrofit: PUMP P&9 & P&10 Replace with 2 New EC Pump for P&9 & P&10 and Controls retrofit $447 $3,800 0.98 8.5 19 Below& (part or all) Grade Wall: Rm 12 & 13 Walls Install R&5 rigid insulation on basement wall $161 $4,071 0.92 25.4 20 Lighting & Combined Retrofit: Restrooms Replace with 13 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor $140 $2,550 0.80 18.2 21 Lighting & Combined Retrofit: Classrooms Replace with 69 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching $605 $11,700 0.72 19.3 22 Lighting & Combined Retrofit: Classrooms Replace with 27 FLUOR (2) T12 F40T12 40W U&Tube Standard Magnetic and Controls retrofit $209 $4,050 0.72 19.3 23 Lighting & Combined Retrofit: MPR Replace with 4 LED 4W Module StdElectronic and Improve Manual Switching $52 $500 0.64 9.6 24 Lighting & Power Retrofit: Office Replace with 34 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic $231 $5,100 0.63 22.1 25 Lighting & Power Retrofit: Mechanical Replace with 18 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic $75 $1,800 0.58 24.1 26 Exterior Door: Storage Rm Metal Door Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $14 $630 0.53 43.8 27 Exterior Door: Wood Man Doors Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $18 $820 0.51 45.5 28 Window/Skylight: Original Wood Frame Windows & North Wing Replace existing window with U&0.30 vinyl window $1,889 $65,576 0.48 34.7 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 29 Above&Grade Wall: North Wing Clerestory Wall Install R&15 rigid foam board to exterior and cover with T1& 11 siding or equivalent. $61 $2,953 0.48 48.6 30 Lighting & Power Retrofit: MPR & Stage Replace with 10 FLUOR (4) T8 4' F32T8 32W Standard (2) Program HighEfficElectronic $41 $1,500 0.38 36.2 31 Lighting & Combined Retrofit: Classrooms Replace with 44 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching $154 $7,500 0.29 48.6 32 Lighting & Power Retrofit: Mechanical Replace with 2 FLUOR T8 4' F32T8 32W Standard Program HighEfficElectronic $1 $100 0.19 74 33 Above&Grade Wall: Original Classroom Walls Install R&5 rigid foam board to exterior and cover with T1& 11 siding or equivalent. $704 $94,665 0.17 134.4 34 Above&Grade Wall: Original MPR Walls Install R&5 rigid foam board to exterior and cover with T1& 11 siding or equivalent. $236 $42,317 0.13 179.4 TOTAL $14,867 $329,283 0.65 22.1 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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 4 Above&Grade Wall: MPR Upper South Wall Wall Type: Other Wall Construction: Concrete block, 2 core Modeled R&Value: 1 Add R&20 rigid foam to interior or exterior of existing wall; cost does not include siding or wall coverings. $1,311 $131 19 Below& (part or all) Grade Wall: Rm 12 & 13 Walls Wall Type: Strapped Masonry Insul. Sheathing: None Masonry Wall: Concrete block, 2 core Framed Wall: 2 x 3, 16" on center EPS (Beadboard), 2 inches Modeled R&Value: 9.3 Install R&5 rigid insulation on basement wall $4,071 $161 29 Above&Grade Wall: North Wing Clerestory Wall Wall Type: Single Stud Siding Configuration: Just Siding Insul. Sheathing: None Structural Wall: 2 x 2, 16 inches on center Fiberglass/Loose fill, 1 inches Window and door headers: Not Insulated Modeled R&Value: 5 Install R&15 rigid foam board to exterior and cover with T1&11 siding or equivalent. $2,953 $61 33 Above&Grade Wall: Original Classroom Walls Wall Type: Stressed Skin Panel Siding Configuration: Siding and Sheathing Panel Insulation: EPS (Beadboard), 1.16 inches Modeled R&Value: 7.2 Install R&5 rigid foam board to exterior and cover with T1&11 siding or equivalent. $94,665 $704 34 Above&Grade Wall: Original MPR Walls Wall Type: Single Stud Siding Configuration: Siding and Sheathing Insul. Sheathing: None Structural Wall: 2 x 6, 16 inches on center Fiberglass/Loose fill, 2 inches Window and door headers: Not Insulated Modeled R&Value: 8.7 Install R&5 rigid foam board to exterior and cover with T1&11 siding or equivalent. $42,317 $236 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 5 Exterior Door: South and East Entry Doors Door Type: R&1 Door (non& standard, not exterior) Modeled R&Value: 1 Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $1,640 $111 26 Exterior Door: Storage Rm Metal Door Door Type: Metal & urethane, no therm. break Modeled R&Value: 2.5 Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $630 $14 27 Exterior Door: Wood Man Doors Door Type: Wood &solid core Modeled R&Value: 2.6 Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $820 $18 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 28 Window/Skylight: Original Wood Frame Windows & North Wing Glass: Single, Glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Quarter Inch Gas Fill Type: Air Modeled U&Value: 1.30 Solar Heat Gain Coefficient including Window Coverings: 0.52 Replace existing window with U&0.30 vinyl window $65,576 $1,889 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 18 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%. $9,800 $1,090 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 2. Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 14 Install Exhaust Stack Economizer for B&1 and B&2 $18,500 $1,310 Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Classrooms Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classrooms space. $1,000 $1,971 3 MPR (Multi& Purpose Room) Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the MPR (Multi&Purpose Room) space. $1,000 $191 Ventilation Rank Recommendation Cost Annual Energy Savings 8 Add DDC control to place North Wing restroom exhaust fans on time schedule. $4,000 $456 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 11 Classrooms (w/ Bilevel Control) 171 FLUOR (3) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching, Multi& Level Switch Replace with 171 FLUOR (4) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching, Multi& Level Switch $31,150 $3,247 13 Mechanical 4 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 4 FLUOR (4) T8 4' F32T8 32W Standard (2) Program HighEfficElectronic $400 $33 15 Wallpack 4 HPS 100 Watt Magnetic with On/Off Photoswitch Replace with 4 LED 25W Module StdElectronic $3,200 $218 16 Surface Mount HPS 2 HPS 100 Watt Magnetic with On/Off Photoswitch Replace with 2 LED 25W Module StdElectronic $1,600 $109 20 Restrooms 13 FLUOR (2) T12 4' F40T12 40W Standard StdElectronic with Clock Timer or Other Scheduling Control Replace with 13 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor $2,550 $140 21 Classrooms 69 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 69 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching $11,700 $605 22 Classrooms 27 FLUOR (2) T12 F40T12 40W U&Tube Standard Magnetic with Manual Switching Replace with 27 FLUOR (2) T12 F40T12 40W U& Tube Standard Magnetic and Controls retrofit $4,050 $209 23 MPR 4 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 4 LED 4W Module StdElectronic and Improve Manual Switching $500 $52 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 24 Office 34 FLUOR (4) T12 4' F40T12 40W Standard (2) StdElectronic with Manual Switching, Occupancy Sensor Replace with 34 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic $5,100 $231 25 Mechanical 18 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 18 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic $1,800 $75 30 MPR & Stage 10 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 10 FLUOR (4) T8 4' F32T8 32W Standard (2) Program HighEfficElectronic $1,500 $41 31 Classrooms 44 FLUOR (2) T12 4' F40T12 40W Standard StdElectronic with Manual Switching Replace with 44 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor and Improve Manual Switching $7,500 $154 32 Mechanical 2 FLUOR T12 4' F40T12 40W Standard StdElectronic with Manual Switching Replace with 2 FLUOR T8 4' F32T8 32W Standard Program HighEfficElectronic $100 $1 Other Electrical Equipment Rank Location Existing Recommended Installed Cost Annual Energy Savings 2 DHW PUMP#5 GRUNDFOS PUMP (180W) Replace with New EC Pump $150 $62 6 AHU&1 MOTOR BALDOR MOTOR (3 HP) with Other Controls Replace with New Premium Efficiency Motor $500 $81 7 FAN F&1 MOTOR LEESON MOTOR (3HP) with Other Controls Replace with New Premium Efficiency Motor $500 $81 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 9 FAN F&2 MOTOR GEN. ELECTRIC MOTOR (1.5 HP) with Other Controls Replace with New Premium Efficiency Motor $450 $72 10 FAN F&3 MOTOR GEN. ELECTRIC MOTOR (1.5 HP) with Other Controls Replace with New Premium Efficiency Motor $450 $72 12 PUMP P&7 & P&8 2 DUPLEX ARMSTRONG/MARATHON PUMP & MOTOR (2 HP) with Manual Switching, Other Controls Replace with 2 New EC Pumps for P&7 & P&8 and Remove Manual Switching $4,000 $591 17 PUMP P&9 & P&10 2 DUPLEX ARMSTRONG/MARATHON PUMP & MOTOR (1.5 HP) with Other Controls Replace with 2 New EC Pump for P&9 & P&10 and Controls retrofit $3,800 $447 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix E Energy Conservation Measures Inlet View Elementary Portable Buildings Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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. $591 $2,000 3.63 3.4 2 Exterior Door: Portable Building & Doors Remove existing door and install standard pre&hung U& 0.16 insulated door, including hardware. $99 $1,230 1.66 12.5 3 Air Tightening Perform air sealing to reduce air leakage by 30%. $256 $2,000 1.12 7.8 4 Lighting & Combined Retrofit: Portable Lighting Replace with 12 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor, Multi&Level Switch $143 $1,925 1.14 13.5 5 Window/Skylight: Portable Building & Single Pane Windows Replace existing window with U&0.22 vinyl window $200 $2,958 1.04 14.8 6 Ceiling w/ Attic: Portable Building & Cold Roof Add R&30 fiberglass batts to attic with Standard Truss. $209 $4,296 1.01 20.6 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. $468 $16,934 0.57 36.2 8 Window/Skylight: Portable Building & Double Pane Windows Replace existing window with U&0.22 vinyl window $110 $2,958 0.57 26.8 9 Lighting & Combined Retrofit: Portable Lighting Replace with 3 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor, Multi&Level Switch $12 $425 0.42 36.6 TOTAL $2,087 $34,726 0.94 16.6 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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 6 Ceiling w/ Attic: Portable Building & Cold Roof Framing Type: Standard Framing Spacing: 24 inches Insulated Sheathing: None Bottom Insulation Layer: R&19 Batt:FG or RW, 6 inches Top Insulation Layer: None Modeled R&Value: 21.1 Add R&30 fiberglass batts to attic with Standard Truss. $4,296 $209 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&11 Batt:FG or RW, 3.5 inches Window and door headers: Not Insulated Modeled R&Value: 10.6 Install R&20 rigid foam board to exterior and cover with T1&11 siding or equivalent. $16,934 $468 Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 2 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. $1,230 $99 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 5 Window/Skylight: Portable Building & Single Pane Windows Glass: Single, Glass Frame: Wood\Vinyl Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U&Value: 0.94 Solar Heat Gain Coefficient including Window Coverings: 0.52 Replace existing window with U&0.22 vinyl window $2,958 $200 8 Window/Skylight: Portable Building & Double Pane Windows Glass: Double, glass Frame: Wood\Vinyl Spacing Between Layers: Quarter Inch Gas Fill Type: Air Modeled U&Value: 0.56 Solar Heat Gain Coefficient including Window Coverings: 0.46 Replace existing window with U&0.22 vinyl window $2,958 $110 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 3 Air Tightness estimated as: 0.80 cfm/ft2 of above&grade shell area at 75 Pascals Perform air sealing to reduce air leakage by 30%. $2,000 $256 2. Mechanical Equipment Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Portable Building Existing Unoccupied Heating Setpoint: 68.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. $2,000 $591 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 4 Portable Lighting 12 FLUOR (4) T12 4' F40T12 40W Standard (2) Magnetic with Manual Switching Replace with 12 FLUOR (3) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor, Multi&Level Switch $1,925 $143 9 Portable Lighting 3 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 3 FLUOR (2) T8 4' F32T8 32W Standard Program HighEfficElectronic and Add new Occupancy Sensor, Multi&Level Switch $425 $12 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix F Site Visit Photos Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 1. Main Entrance 2. South Entry Doors 3. Southeast Face 4. East Entry Doors 5. North Wing Classroom Windows 6. MPR North Windows Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 7. South wall of MPR from roof 8. Corrugated plastic on south wall of MPR from roof 9. North wing roof 10. South wing roof 11. Typical classroom relief air fan 12. One of three on&site portable buildings Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 13. Two gas&fired Weil McLain boilers 14. Domestic Hot Water Heater and circ pumps 15. Duplex circulation pumps P&7 & P&8 16. Duplex circulation pumps P&9 & P&10 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 17. Siemens APOGEE DDC System 18. Old coal hatch into boiler room 19. Outside air and return air mixing zone in fan room 20. Fan F&1 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 21. Fan F&2 22. Fan F&3 Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Appendix G Thermographic Photos Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Coffman Engineers made miscellaneous thermographic images of Inlet View Elementary School using a FLIR T300 Infrared Camera. This is not a thermographic study, rather photographs to illustrate easy&to& identify heat losses. The outside air temperature is approximately &5F. 1. Optical Image, West Entry. Thermal Image below is indicated by the white border. 2. Thermographic Image, West Entry. Temperatures indicated by color scale on right. Yellow indicates heat leakage. Inlet View Elementary Coffman Engineers, Inc. 6/13/2012 3. Optical Image, West MPR Wall. Thermal Image to the right is indicated by the white border. 5. Optical Image, West MPR Windows. Thermal Image to the right is indicated by the white border. 7. Optical Image, South Entry Doors. Thermal Image to the right is indicated by the white border. Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 9. Optical Image, Old Coal Dump Hatch. Thermal Image to the right is indicated by the white border. 10. Thermographic Image, Old Coal Dump Hatch. Heat loss occurring through un& insulated hatch. 11. Optical Image, Combustion Air Vent. Thermal Image to the right is indicated by the white border. 12. Thermographic Image, Combustion Air Vent. Heated air from boiler room is rising out of vent due to stack effect. 13. Optical Image, West Library Wall. Thermal Image to the right is indicated by the white border. 14. Thermographic Image, West Library Wall. Heat loss through poorly insulated wall. Inlet View Elementary Coffman Engineers, Inc. 6/13/2012 15. Optical Image, Portable Building. Thermal Image to the right is indicated by the white border.