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Home My WebLink AboutCIRI-52Z-CAEC Moose Pass School 2012-EE 800 F Street Anchorage, AK 99501 p (907) 276‐6664 f (907) 276‐5042 Contact: Walter K. Heins, P.E., CCP, CxA, CEA 32215 Lakefront Dr. Soldotna, Alaska 99669 p (907) 260‐5311 Contact: Jerry P. Herring, PE, CEA ENERGY AUDIT FINAL REPORT Moose Pass Elementary 31810 Depot Road Moose Pass, AK 99631 (907) 714‐8825 AkWarm ID No. CIRI‐52Z‐CAEC‐01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 i AkWarm ID No. CIRI-52Z-CAEC-01 Contents I. Executive Summary .................................................................................................................. 3 II. Introduction .............................................................................................................................. 7 III. Energy Audit Process ............................................................................................................. 8 IV. Method of Analysis ................................................................................................................. 9 V. Building Description .............................................................................................................. 10 VI. Historic Energy Consumption and Cost............................................................................. 12 VII. Equipment Inventory and Photo Survey .......................................................................... 13 VIII. Energy Conservation Measures ....................................................................................... 14 VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 14 VIII.II ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ......................................... 18 Appendices Appendix A – Energy Benchmark Data Appendix B – AkWarm Commercial Reports Appendix C – Major Equipment List Appendix D – Energy Conservation Measures Appendix E – Site Visit Photos Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 ii AkWarm ID No. CIRI-52Z-CAEC-01 REPORT DISCLAIMER Privacy The information contained within this report, including any attachment(s), was produced under contract to Alaska Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be incorporated into AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or public information systems. AkWarm-C is a building energy modeling software developed under contract by AHFC. Limitations of Study This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of input data provided. Not all data could be verified and no destructive testing or investigations were undertaken. Some data may have been incomplete. This report is not intended to be a final design document. Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design. Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work performed as a result of this report. Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the forecasted financial ratios. The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings. Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting quality. The new generation lighting systems have significantly longer life leading to long term labor savings, especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7 years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the performance of students and workers in the built environment. New lighting systems can be designed to address all of the above benefits. US Government Disclaimer This material is based upon work supported by the Department of Energy under Award Number DE-EE0000095. This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 3 AkWarm ID No. CIRI-52Z-CAEC-01 I. Executive Summary This report presents the findings of an energy audit conducted at Moose Pass 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 Kenai Peninsula Borough School District Contact: Dave Spence 139 East Park Avenue Soldotna, AK 99669 Email: dspence@kpbsd.k12.ak.us This audit was performed using ARRA funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State’s economy. This can be achieved through the wiser and more efficient use of energy. The July 2009-June 2010 documented annual utility costs at this facility are as follows: Electricity $11,730 Propane $20,321 Total $32,051 July 2009-June 2010 Energy Utilization Index (EUI) = 145.4kBtu/sf July 2009-June 2010 Energy Cost Index = 3.47 $/sf Energy Conservation Measures calculated to be cost effective are shown below in Table 1 with 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. A table of all ECMs considered is attached as Appendix D, Energy Conservation Measures. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 4 AkWarm ID No. CIRI-52Z-CAEC-01 Table 1 Recommended Cost Effective Energy Conservation Measures (ECM’s) PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (years) 1* Summer Equipment Shutdown Turn off boilers and water heaters during the summer. $136 $0 ∞ 0 2 Setback Thermostat: Gym Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gym space. $1,679 $1,000 22.98 0.6 3 Setback Thermostat: Classrooms Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classrooms space. $1,457 $1,000 19.96 0.7 4 Lighting: Class/Heavy Use Office 2T8 Light**** Replace with 49 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensors and Improve Manual Switching $511 $721 10.92 1.4 5 Exterior Door: Shed Single Door Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $49 $467 2.52 9.5 6* Upgrade Controls Install DDC control system to control temp setbacks, outside air and motor run time $3,507 $30,000 2.34 8.6 7 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,280 $6,000 2.03 4.7 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 5 AkWarm ID No. CIRI-52Z-CAEC-01 PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (years) 8 Lighting: Class/Heavy Use Office 4T8 Light**** Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensors and Improve Manual Switching $19 $121 2.03 6.4 9** HVAC And DHW Replace four circulation pumps with electronically commutated motors $241 $1,680 1.82 7 10 Lighting: Kitchen Replace with 3 FLUOR CFL, Reflector 23W R25 $34 $120 1.81 3.5 11* Fill in 50% windows Replace half of classroom window areas with solid wall. $193 $3,000 1.61*** 15.5 12 Exterior Door: Shed - Double Door Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $119 $1,868 1.52 15.7 13 Exterior Door: Double Exterior Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $391 $6,136 1.52 15.7 14 Lighting: Restroom **** Replace with 12 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensors and Improve Manual Switching $59 $601 1.52 10.1 15 Lighting: Gym Replace with 16 FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic and Add new Occupancy Sensors and Improve Manual Switching, Multi- Level Switch $273 $3,950 1.10 14.5 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 6 AkWarm ID No. CIRI-52Z-CAEC-01 PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (years) 16* Condensing Boiler/Furnace Replace boilers and furnace with 92% AFUE minimum condensing boiler and condensing furnace $1,924 $30,000 1.09 15.6 17 Lighting: Exterior Lighting Replace with 3 LED 50W Module StdElectronic $75 $1,125 1.02 15 * 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 cost savings total in the final AkWarm model in the Appendix D. ** $1,680 is the repair cost, which is the incremental cost of repairing a burned-out pump with a new electronically commutated motor rather than repairing with the same model pump as the original. *** SIR for window ECM could not be calculated in AkWarm due to the fact that the ECM could not be modeled as an improvement item in AkWarm. However, based on a 25 yr life for the new wall, the SIR is estimated to be 1.55. **** This item is intended to be implemented once the existing instant start ballasts fail and require replacement, negating the cost of installing new ballasts. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 7 AkWarm ID No. CIRI-52Z-CAEC-01 II. Introduction This comprehensive energy audit covers the 9,245 square foot (sf) Moose Pass Elementary School. The school campus includes 8,555 sf of classrooms, locker rooms, restrooms, administrative offices, a library, and a gymnasium. There is also a 170 sf generator storage shed, a 360 sf storage shed, and a 160 sf storage shed on the campus. The location of the school is shown in the following maps. Moose Pass – Google Maps Moose Pass Elementary School – Google Maps Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 8 AkWarm ID No. CIRI-52Z-CAEC-01 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 fuel oil 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 June 29, 2011. 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. John Grimes of the KPBSD 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. John Grimes, (907) 398-6915 (mobile), (907) 224-9530 (office) Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 9 AkWarm ID No. CIRI-52Z-CAEC-01 IV. Method of Analysis Coffman Engineers (CEI) began the site survey after completing the preliminary audit tasks noted in Section II. The site survey provided critical input in deciphering where energy opportunities exist within the facility. The audit team walked the entire site to inventory the building envelope (roof, windows, etc.), the major equipment including HVAC, water heating, lighting, and equipment in kitchens, offices, and classrooms. The site survey was used to determine an understanding of how the major equipment is used. The collected data was entered into the AkWarm Commercial™ software, an energy calculating program for buildings. The data was processed by AkWarm to model a baseline from which energy conservation measures (ECMs) could be considered. The model was compared to actual utility costs to ensure the quality of baseline and proposed energy modeling performed by AkWarm. The recommended ECMs focus on 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 where possible. 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 must be calculated and identified appropriately in groups. In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM. The lifetime for each ECM is estimated based on the typical life of the equipment being replaced or altered. The energy savings are extrapolated throughout the lifetime of the ECM. The total energy savings are calculated as the total lifetime multiplied by the yearly savings. Cost savings are calculated based on the historical energy costs for the building. Installation costs include labor and equipment to evaluate the initial investment required to implement and ECM. These are applied to each recommendation with simple paybacks calculated. The energy analyst’s opinions of probable cost are garnered from 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. The costs and savings are applied to calculate simple payback2 and Savings to Investment Ratio3 (SIR).These are listed in Appendix D and summarized in Table 1 of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed cost 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. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 10 AkWarm ID No. CIRI-52Z-CAEC-01 V. Building Description The Moose Pass Elementary School is a single story building with an attached two story gymnasium. Original construction of the classroom areas occurred in 1953 and multiple additions have been constructed with the latest addition occurring in 1997. The construction of the building consists of wood framing with metal siding and a crawlspace underneath all areas except the gymnasium. The school is typically occupied from 8AM to 4PM during the weekdays with extracurricular and community activities happening occasionally in the evenings and the weekends in the gymnasium area. There are an estimated 24 full time occupants of the building, including 18 children and 4 adults. There are three detached sheds at the school as well. Two sheds are used for storage of school equipment while the other shed houses the emergency generator. Exterior walls of the main building, excluding the gymnasium area, use a double pane, wood framed window and have an estimated U-factor in the range of 0.59 BTU/hr-sf-F. The wall height of the main building is 9 feet high with an additional foot above the suspended ceiling as a soffit area, making the total wall height 10 feet. The exterior walls have been insulated using R-9 FGB (fiberglass batt) between the studs. Exterior walls of the crawlspace are insulated with two inches of extruded polystyrene insulation and the interior walls have been lined with two inch FGB. The crawlspace walls are 4 ft tall. The gym walls are 2”x8” wood stud construction at 16” on-center and are insulated with R-19 FGB insulation. The average gym wall height is 21 feet above the finished floor. The roof system has FGB insulation above the gymnasium with an estimated R-38 insulating value. The main building was re-roofed and it is assumed that the insulation is R-38 FGB, based on the most recent classroom addition. Calculations have determined that there is approximately 1676 SF of below grade wall component, 9650 SF of above grade wall component, 8653 SF of roof assembly, and 8555 sf of concrete flooring for the main building. The main building is heated using through-wall unit ventilators in the classroom and library areas, hot water baseboard in the office areas, and cabinet unit heaters in the hallway areas. Heat for the cabinet unit heaters is supplied from two hot water boilers which run continuously during the year. The boilers are produced by Weil McLain, Model HE-6 and are rated at 167,000 BTU input for heating. The through- wall ventilators are produced by Nesbitt and are assumed to be original equipment. This heating system is controlled using pneumatic controls. Exhaust fans for the restrooms in the main building are ducted to an exhaust fan on the roof. The gymnasium building (including the kitchen area, the locker areas, and the restrooms) is heated and ventilated using a Jernlund 74-37580 forced air furnace. The furnace provides 550,000 BTU/hr at 6,500 CFM. The furnace provides ventilation air all year. The kitchen exhaust is provided with a 1050 CFM Vulcan range hood while the restroom/locker areas are provided with a 530 CFM rooftop mounted exhaust fan. An 890 CFM rooftop exhaust fan is provided for the mechanical room. The three detached sheds are each heated by an electric unit heater. Each shed’s thermostat is set for 40°F. The construction of the sheds consists of 2”x4” wall construction, 16-inches on center, with two inches of batt insulation between the studs. The sheds have been elevated off of the ground using cinder blocks, but the exposed floor has not been insulated. It was assumed that the ceiling spaces of the sheds contained two inch batt insulation. The storage sheds have a total of 690 sf of above grade floors, 1638 sf of above grade wall area, and 976 sf of roof assembly. Domestic hot water for the main building is supplied by a 50 gallon tank type electric hot water heater, manufactured by the American Water Heater Company. The domestic hot water for the attached gymnasium building is supplied by a 50 gallon tank type propane water heater, manufactured by A.O. Smith. Both water heaters are in good condition and are less than five years old. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 11 AkWarm ID No. CIRI-52Z-CAEC-01 The majority of the building areas are lit via 2-foot by 4-ft recessed 32W T-8 fluorescent lamp system with electronic ballasts. In the gymnasium, the play area is lit by 250W metal halide lights with wire screens. The exterior soffit areas to the school consist of 75W high pressure sodium (HPS) light system. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 12 AkWarm ID No. CIRI-52Z-CAEC-01 VI. Historic Energy Consumption and Cost Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and propane gas energy usage for the surveyed facility from January 2009 to December 2010. Homer Electric provides the electricity and Suburban provides the propane to the building. Both utilities bill under their commercial rate schedules. The electric utility bills for consumption in kilowatt-hours (kWh) and for maximum demand in kilowatts (kW). One kilowatt-hour is equivalent to 3413 BTUs. The consumption (kWh) is determined as the wattage times the hours it is running. For example, 1,000 watts running for one hour, or 500 watts running for two hours. The maximum demand is simply the sum of all electrical devices on simultaneously. For example, ten, 100 watt lights running simultaneously would create a demand of 1,000 watts (1 kW). Demand is averaged over rolling window, usually 15 minutes. Thus, the facility must be concerned not only with basic electricity usage (consumption) but also the rate at which it gets used. The basic usage charges are shown as generation service and delivery charges along with several non-utility generation charges. The propane gas supplier bills for consumption in gallons of propane. Propane is delivered under a contract to top off the tank on a monthly basis. The average heating value of propane gas is 91,800 BTUs per gallon, which is equal to approximately 0.92 Therms of energy. The average billing rates for energy use are calculated by dividing the total cost by the total usage. Based on the electric and propane utility data provided, the 2009 and 2010 costs for the energy and consumption at the surveyed facility are summarized in Table 2 below. Table 2 Energy Cost and Consumption Data for 2009 and 2010 2009 2010 Electric 0.16 $/kWh 0.13 $/kWh Propane Gas 1.72 $/Gal 1.77 $/Gal Total Cost $33,059 $31,042 ECI 3.58 $/sf 3.36 $/sf Electric EUI 32.1 kBtu/sf 29.5 kBtu/sf Propane EUI 103.9 kBtu/sf 108.0 kBtu/sf Building EUI 144.5 kBtu/sf 146.3 kBtu/sf The Energy Cost Index (ECI) is derived by dividing the annual cost and dividing it by the building square footage. The building square footage was calculated to be 9,245 sf. This area includes the 8,555 sf school, the 170 sf generator storage shed, the 360 sf storage shed, and the 160 sf storage shed. The Energy Utilization Index (EUI) is a measure of a building’s energy utilization per square foot of building. This calculation is completed by converting the building’s utility consumption (propane and electric) over a specified time period, typically one year, to British Thermal Units (BTU) and dividing this number by the building square footage. EUI is a good measure of a building’s energy use and is utilized regularly for comparison of energy performance amongst buildings of similar type. The electric and propane EUI figures can be separated to analyze the comparative energy use. The EUI numbers for this facility are listed above. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 13 AkWarm ID No. CIRI-52Z-CAEC-01 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 detailing the equipment and building are included in Appendix E. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 14 AkWarm ID No. CIRI-52Z-CAEC-01 VIII. Energy Conservation Measures VIII.I School Energy Conservation Measures ECM #1 – Turn Off Un-used Mechanical Equipment in Summer Months It was noted during the site visit that the two boilers, two hot water heaters, supply fan to the boiler room, the furnace, and various other mechanical equipment were left on during the summer months. By turning off un-used mechanical equipment during the summer, at least $136 could be saved. The saving-to- investment ratio is infinite and payback is zero, as no investment is required and there is nothing spent to upgrade this system. ECM #2 and #3 – Setback Thermostat Significant energy savings exist by reducing the room temperature of the gym and classrooms during unoccupied times. Reducing the temperature to 60F during unoccupied times will save approximately $1,679 for the gym and $1,457 for the classrooms. The SIR for the gym and classroom ECMs is 22.98 and 19.96, respectively. ECM #4 – Replace the Instant Start Electronic Ballasts with Programmable Start Ballasts in all Two Lamp Fluorescent Light Fixtures in the Classrooms and Frequently Used Office Spaces, and Install Occupancy Sensors for Control. The original two lamp fluorescent light fixtures installed in the Moose Pass School classrooms and offices were equipped with fluorescent T12 lamps, and magnetic ballasts. Nearly every light fixture has since been upgraded with T8 lamps and instant start electronic ballasts. It is recommended that the existing instant start ballasts be replaced with programmable start electronic ballasts and new occupancy sensors be installed in each classroom and office. Programmable start ballasts are recommended because occupancy sensors shorten the life of instant start ballasts, due to frequent switching. By providing programmable start ballasts and occupancy sensor control of the classrooms and offices in Moose Pass School approximately $511 will be saved annually, with an initial cost of $721. This installed cost is for the occupancy sensors only. It is recommended that the programmable start ballasts be replaced when the existing instant start ballast fails. The savings-to-investment ratio (SIR) is approximately 10.92 and the simple payback is approximately 1.4 years. ECM #5 – Replace Exterior Door in Shed The existing door of the heated shed is old with a low insulation value of approximately R-1. It is recommended that this door be removed and replaced with a new R-6.25 minimum (U-0.16) insulated door. This ECM will save approximately $49 per year with a payback of 9.5 years and an SIR of 2.52. ECM #6 – Upgrade Control System to DDC Controls The existing controls at Moose Pass are pneumatic controls, which allow limited feedback and control of the building’s mechanical system. Upgrading the building control system to a Direct Digital Control (DDC) system will offer significantly more control over the mechanical system and allow significant Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 15 AkWarm ID No. CIRI-52Z-CAEC-01 energy savings to be had. When upgrading the control system to new DDC controls there are two options: 1) installing DDC controls with new DDC compatible electric actuators or 2) installing DDC controls with electric-to-pneumatic (E/P) transducers to operate existing pneumatic actuators. The second option was evaluated in this ECM, as it will involve less material and installation costs because existing pneumatic actuators can be used. Using a DDC system for high level mechanical control will allow automatic temperature setbacks, reduced motor run time and reduced AHU operations and better outdoor air intake control. A new DDC system will cost approximately $30,000 and save $3,507 annually. The SIR for this improvement was estimated at 2.34 based on a 20 year serviceable life. The simple payback is 8.6 years. ECM #7– Seal Building Envelope and Reduce Infiltration by 20% A large portion of the school was built during the 1950’s with double paned wood-framed windows, 2x4 wall construction and a crawlspace area. The three classrooms and the library also contain unit ventilators mounted in the wall to provide ventilation and heat to the rooms. All of these items contribute to a large infiltration loss from the building, due to air leakage. Methods to decrease the infiltration into the building include: sealing around the windows and doors with caulking and insulation, gasketing the through-wall ventilators, providing gaskets to all exterior cover plates, install additional insulation to the crawlspace areas, and add weather stripping around exterior doors. Reducing infiltration by 20% with air sealing improvements will save approximately $1,280 per year and will have an initial cost of approximately $6,000. The savings-to-investment ratio (SIR) is approximately 2.03 with a payback of 4.7 years. ECM #8 – Replace the Instant Start Electronic Ballasts with Programmable Start Ballasts in all Four Lamp Fluorescent Light Fixtures in the Classrooms and Frequently Used Office Spaces, and Install Occupancy Sensors for Control. The original four lamp fluorescent light fixtures installed in the Moose Pass School classrooms and offices were equipped with fluorescent T12 lamps, and magnetic ballasts. Nearly every light fixture has since been upgraded with T8 lamps and instant start electronic ballasts. It is recommended that the existing instant start ballasts be replaced with programmable start electronic ballasts and new occupancy sensors be installed in each classroom and office. Programmable start ballasts are recommended because occupancy sensors shorten the life of instant start ballasts, due to frequent switching. By providing programmable start ballasts and occupancy sensor control of the classrooms and offices in Moose Pass School approximately $19 will be saved annually, with an initial cost of $121. This installed cost is for the occupancy sensors only. It is recommended that the programmable start ballasts be replaced when the existing instant start ballast fails. The savings-to-investment ratio (SIR) is approximately 2.03 and the simple payback is approximately 6.4 years. ECM #9 – Replace Constant Speed Pumps with Electronically Commutated Motors The four circulation pumps, P-1, P-2, P-3 and P-4, installed in the school are constant speed pumps. New, high-efficiency pumps with electronically commutated (EC) motors have integral speed controls which read system demand. This will allow the pump to slow down with significant electrical savings. Replacing the existing motors with EC motors now (while the existing motor is still functional) will result in a $4,215 replacement cost with an annual energy savings of $241. The SIR for this replacement is 0.73 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 16 AkWarm ID No. CIRI-52Z-CAEC-01 with a 17.5 year payback. However, upgrading to EC motors when the existing motors fail and are in need of repair will offer a much better payback; because the marginal cost of choosing a high efficiency EC motors over the standard replacement is only a $1,680 repair cost. This repair cost offers a simple payback of 7.0 yrs, resulting in an SIR of 1.82. The repair upgrade is recommended as it is the most cost effective option ECM #10– Re-lamp the Existing Incandescent Light Fixtures with Compact Fluorescent Lamps There are approximately three (3) existing 100w incandescent light fixtures located in the kitchen of Moose Pass School. By replacing the incandescent lamps with compact fluorescent lamps approximately $34 will be saved annually, with an initial cost of $120. The savings-to-investment ratio (SIR) is approximately 1.81 and the simple payback is approximately 3.5 years. ECM #11 - Remove Half of East Classroom Windows and Replace with Solid Wall The school classrooms have large areas of single pane, operable windows with wooden frames. By removing half of the windows from the east-facing classrooms and filling in the space with solid insulated walls, the school would save $193 per year. At an installation cost of $3,000, the payback will be 15.5 years. By replacing the windows, the infiltration from the cracks around the existing windows would be reduced as well. The SIR for this improvement item could not be calculated in AkWarm due to the fact that the ECM could not be modeled as an improvement item in AkWarm. However, based on a 25 yr life for the new wall, the SIR is estimated to be 1.61. ECM #12 – Replace Existing Double Door in Heated Shed The existing double door of the heated shed is old with a low insulation value of approximately R-1.7. It is recommended that this double door be removed and replaced with a new R-6.25 minimum (U-0.16) insulated door. This ECM will save approximately $119 per year with a payback of 15.7 years and an SIR of 1.52. ECM #13 – Replace Existing Double Doors in School The existing double doors of the school are old with low insulation values of approximately R-1.7. It is recommended that these doors be removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. This ECM will save approximately $391 per year with a payback of 15.7 years and an SIR of 1.52. ECM #14– Replace the Instant Start Electronic Ballasts with Programmable Start Ballasts in all Fluorescent Light Fixtures in the Restrooms, and install Occupancy Sensors for Control. The original light fixtures installed in the Moose Pass School restrooms were 4' 2 lamp T12 fluorescent surface mounted strip light fixtures with magnetic ballasts. Nearly every light fixture has since been upgraded with T8 lamps and instant start electronic ballasts. It is recommended that the existing instant start ballasts be replaced with programmable start electronic ballasts and new occupancy sensors be installed in each classroom and office. Programmable start ballasts are recommended because occupancy sensors shorten the life of instant start ballasts, due to frequent switching. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 17 AkWarm ID No. CIRI-52Z-CAEC-01 By providing programmable start ballasts and occupancy sensor control of the restrooms in Moose Pass School approximately $59 will be saved annually, with an initial cost of $601. This installed cost is for the occupancy sensors only. It is recommended that the programmable start ballasts be replaced when the existing instant start ballast fails. The savings-to-investment ratio (SIR) is approximately 1.52 and the simple payback is approximately 10.1 years. ECM #15 –Replace Gym Lighting with T-5HO High Bay Light Fixtures, and Install Occupancy Sensors for Control The gymnasium in the Moose Pass Elementary School is currently lit by sixteen 250W Metal Halide light fixtures. These fixtures are not compatible with occupancy sensors because of a long start time. By replacing the existing light fixtures with 4 lamp T5HO light fixtures with occupancy sensor control, approximately $273 will be saved annually with a payback of 14.5 years and a SIR of 1.10. ECM #16 – Replace Existing Boilers and Furnace with Condensing-Burner Units While the two cast iron boilers (B-1 and B-2) still have approximately 10 more years of service, the furnace for the gym area is original to the gym and is past its serviceable life expectancy. If the boilers and the furnace were replaced with new, high efficiency equipment, the savings would be approximately $1,924 per year at an installed cost of $30,000. The SIR ratio is 1.09 with a payback period of 15.6 years. The service life of the new boilers and furnace is approximately 25 to 30 years, according to ASHRAE. Installing a condensing furnace as a repair when the existing furnace fails will improve the ECM to just the marginal cost of the better furnace. This option is recommended as it is more cost-effective. ECM #17 – Replace the High Pressure Sodium Exterior Light Fixtures with LED Light Fixtures. The existing exterior light fixtures are equipped with 100W high pressure sodium (HPS) lamps and are controlled by a photocell and a timer to shutdown the lights during the night. By replacing the existing HPS light fixtures with LED light fixtures approximately $75 will be saved annually, with an initial cost of $1,125. The savings-to-investment ratio (SIR) is approximately 1.02 and the simple payback is approximately 15.0 years. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 18 AkWarm ID No. CIRI-52Z-CAEC-01 VIII.II 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. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Appendix A Energy Benchmark Data First Name Last Name Middle Name Phone Paul Brenner 907‐714‐8825 State Zip AK 99669 Monday‐ Friday Saturday Sunday Holidays 7 to 50 0 0 Average # of Occupants During 80 0 0 0 Renovations / Notes Date 53, 60, 74, 93 Note:Drawings are maintained at district maintenance office in Soldotna Contact Person Email pbrenner@kpbsd.k12.ak.us Mailing Address City 148 N. Binkley St Soldotna Primary Operating Hours Details Unknown Renovations Facility Address Facility City Facility Zip 31810 Depot Rd Moose Pass 99631 Building Type Community Population Year Built School 250 1935 Building Name/ Identifier Building Usage Building Square Footage Moose Pass Education 9,245 KPBSD Municipal 03/15/11 REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner Facility Owned By Date Note: PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton Other energy sources? 2. Provide utilities bills for the most recent two‐year period for each energy source you use. 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. Drawings are maintained at district maintenance office in Soldotna. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Buiding Size Input (sf) =9,245 2009 Natural Gas Consumption (Therms) 2009 Natural Gas Cost ($) 2009 Electric Consumption (kWh)84,642 2009 Electric Cost ($)13,441 2009 Propane Consumption (Therms)10,466 2009 Propane Cost ($)19,618 2009 Total Energy Use (kBtu)1,335,495 2009 Total Energy Cost ($)33,059 Annual Energy Use Intensity (EUI) 2009 Electricity (kBtu/sf)31.2 2009 Propane (kBtu/sf) 103.9 2009 Energy Utilization Index (kBtu/sf)144.5 Annual Energy Cost Index (ECI) 2009 Electric Cost Index ($/sf)1.45 2009 Propane Cost Index ($/sf)2.12 2009 Energy Cost Index ($/sf)3.58 2010 Electric Consumption (kWh)77,640 2010 Electric Cost ($)10,019 2010 Propane Consumption (Therms)10 8742010 Propane Consumption (Therms)10,874 2010 Propane Cost ($)21,023 2010 Total Energy Use (kBtu)1,352,356 2010 Total Energy Cost ($)31,042 Annual Energy Use Intensity (EUI) 2010 Electricity (kBtu/sf)28.7 2010 Propane (kBtu/sf)108.0 2010 Energy Utilization Index (kBtu/sf)146.3 Annual Energy Cost Index (ECI) 2010 Electric Cost Index ($/sf)1.08 2010 Propane Cost Index ($/sf)2.27 20010 Energy Cost Index ($/sf)3.36 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Moose PassElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)Homer Electric 285083 Jul-08 6/18/2008 7/20/2008332,691928$403$0.15Homer Electric 285083 Aug-08 7/21/2008 8/20/2008313,42911718$564$0.16Homer Electric 285083 Sep-08 8/21/2008 9/22/2008335,80019824$872$0.15Homer Electric 285083 Oct-08 923/2008 10/22/2008306,64122728$992$0.15Homer Electric 285083 Nov-08 10/23/2008 11/19/2008288,25428231$1,182$0.14Homer Electric 285083 Dec-08 11/20/2008 12/22/2008339,48832435$1,578$0.17Homer Electric 285083 Jan-09 12/23/2008 1/21/20093011,47139236$1,825$0.16Homer Electric 285083 Feb-09 1/22/2009 2/22/20093210,15434735$1,662$0.16Homer Electric 285083 Mar-09 2/23/2009 3/24/2009308,28728332$1,344$0.16Homer Electric 285083 Apr-09 3/25/2009 4/22/2009298,11627730$1,293$0.16Homer Electric 285083 May-09 4/23/2009 5/21/2009296,43121927$1,065$0.17Homer Electric 285083 Jun-09 5/22/2009 6/22/2009323,88013222$661$0.17Homer Electric 285083 Jul-09 6/23/2009 7/22/2009302,6809110$404$0.15Homer Electric 285083 Aug-09 7/23/2009 8/23/2009322,8009615$468$0.17Homer Electric 285083 Sep-09 8/24/2009 9/21/2009295,84019922$798$0.14Homer Electric 285083 Oct-09 9/22/2009 10/21/2009296,0002050$800$0.13Homer Electric 285083 Nov-09 10/22/2009 11/19/2009278,12027734$823$0.10Homer Electric285083Dec-0911/20/200912/20/2009309,00030732$1,182$0.13Homer Electric285083Dec-0911/20/200912/20/2009309,00030732$1,182$0.13Homer Electric 285083 Jan-10 12/21/2009 1/19/2010298,80030031$1,056$0.12Homer Electric 285083 Feb-10 1/20/2010 2/17/2010298,72029832$1,058$0.12Homer Electric 285083 Mar-10 2/18/2010 3/18/2010327,64026131$971$0.13Homer Electric 285083 Apr-10 3/19/2010 4/19/2010317,44025429$964$0.13Homer Electric 285083 May-10 4/20/2010 5/20/2010306,08020826$831$0.14Homer Electric 285083 Jun-10 5/21/2010 6/21/2010304,52015422$664$0.15Jul - 08 to Jun - 09 total:84,6422,889326$13,441$0Jul - 09 to Jun - 10 total:77,6402,650285$10,019$0Jul - 08 to Jun - 09 avg:$0.16Jul - 09 to Jun - 10 avg:$0.13Moose Pass Elementary School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 $1,200$1,400$1,600$1,800$2,0008,00010,00012,00014,000Electric Cost ($)Electric Consumption (kWh)Moose Pass - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)$0$200$400$600$800$1,00002,0004,0006,000Electric Cost ($)Electric Consumption (kWh)Date (Mon - Yr)Electric Consumption (kWh)Electric Cost ($)Moose Pass Elementary School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Moose PassPropaneBtus/Gal =91,800ProviderCustomer #MonthStart DateEnd DateBilling DaysConsumption (Gal)Consumption (Therms)Demand UsePropane Gas Cost ($)Unit Cost ($/Therm)Demand Cost ($)Suburban836-003Jul-087/1/20087/31/200830574527$1,3752.61Suburban836-003Aug-088/1/20088/31/200830471432$1,0402.41Suburban836-003Sep-089/1/20089/30/200829481442$1,0372.35Suburban836-003Oct-0810/1/200810/31/2008301,4051,290$2,7592.14Suburban836-003Nov-0811/1/200811/30/2008291,1521,058$2,2192.10Suburban836-003Dec-0812/1/200812/31/2008301,080991$1,8041.82Suburban836-003Jan-091/1/20091/31/2009302,3542,161$3,6791.70Suburban836-003Feb-092/1/20092/28/200927647594$1,0861.83Suburban836-003Mar-093/1/20093/31/2009301,059972$1,6491.70Suburban836-003Apr-094/1/20094/30/2009291,6031,472$2,2441.52Suburban836-003May-095/1/20095/31/200930575528$7261.38Suburban836-003Jun-096/1/20096/30/20092900$00.00Suburban836-003Jul-097/1/20097/31/20093000$00.00Suburban836-003Aug-098/1/20098/31/200929813746$1,0231.37Suburban836-003Sep-099/1/20099/30/200929940863$1,1881.38Suburban836-003Oct-0910/1/200910/31/200929730670$9201.37Suburban836-003Nov-0911/1/200911/30/2009291,5411,415$3,0972.19Suburban836-003Dec-0912/1/200912/31/2009301,3771,264$2,9632.34Suburban836-003Jan-101/1/20101/31/2010301,3421,232$3,0802.50Suburban836-003Feb-102/1/20102/28/2010271,1421,048$1,4691.40Suburban836-003Mar-103/1/20103/31/2010301,5361,410$2,9262.08Suburban836-003Apr-104/1/20104/30/2010291,013930$1,8441.98Suburban836-003May-105/1/20105/31/201030927851$1,6631.95Suburban836-003Jun-106/1/20106/30/201029484444$8501.91Jul - 08 to Jun - 09 total:11,40110,4660$19,618$0Jul - 09 to Jun - 10 total:11,84510,8740$21,023$0Jul - 08 to Jun - 09 avg:1.96Jul - 09 to Jun - 10 avg:1.86Moose Pass Elementary School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 $2,500 $3,000 $3,500 $4,000 1,5002,0002,500Propane Cost ($)Propane Consumption (Therms)Moose Pass - Propane Consumption (Therms) vs Propane Cost ($)Propane Consumption (Therms)$0 $500 $1,000 $1,500 $2,000 05001,000Propane Cost ($)Propane Consumption (Therms)Date (Mon - Yr)Propane Cost ($)Moose Pass Elementary School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Appendix B AkWarm Commercial Reports Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Energy Audit – Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Moose Pass School Page 3 ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 1/26/2012 1:43 PM General Project Information PROJECT INFORMATION AUDITOR INFORMATION Building: Moose Pass School Auditor Company: Coffman Engineers, Inc. Address: 31810 Depot Road, Moose Pass, AK Auditor Name: Walter Heins City: Moose Pass Auditor Address: 800 F Street Anchorage, AK 99501 Client Name: Paul Brenner Client Address: 148 N. Binkley St. Soldotna, AK 99669 Auditor Phone: (907) 276-6664 Auditor FAX: (907) 276-5042 Client Phone: (907) 714-8825 Auditor Comment: Client FAX: Design Data Building Area: 9,245 square feet. This area includes the 8,555 sf school, the 170 sf generator storage shed, the 360 sf storage shed, and the 160 sf storage shed. Design Heating Load: Design Loss at Space: 342,921 Btu/hour with Distribution Losses: 349,742 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 533,144 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Typical Occupancy: 36 people Design Indoor Temperature: 63.1 deg F (building average) Actual City: Moose Pass Design Outdoor Temperature: -7.5 deg F Weather/Fuel City: Moose Pass Heating Degree Days: 11,126 deg F-days Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 1/26/2012 1:43 PM General Project Information Utility Information Electric Utility: Chugach Electric - Commercial - Sm Natural Gas Provider: None Average Annual Cost/kWh: $0.150/kWh Average Annual Cost/ccf: $0.000/ccf Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 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 $22,798 $0 $967 $2,450 $1,034 $1,874 $1,218 $47 $2,209 $0 $32,598 With Proposed Retrofits $17,040 $0 $967 $1,436 $1,034 $1,874 $1,218 $47 $2,209 $0 $25,825 SAVINGS $5,758 $0 $0 $1,015 $0 $0 $0 $0 $0 $0 $6,772 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 $0$5,000$10,000$15,000$20,000$25,000$30,000$35,000Existing RetrofitVentilation and FansSpace HeatingRefrigerationOther ElectricalLightingDomestic Hot WaterCookingClothes DryingAnnual Energy Costs by End Use Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Appendix C Major Equipment List Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES B-1 BOILER RM BUILDING HEATING WEIL-MCLAIN Model HE-6 CAST IRON PROPANE FUEL 167 MBH ≈ 80% - 30 15 B-2 BOILER RM BUILDING HEATING WEIL-MCLAIN Model HE-6 CAST IRON PROPANE FUEL 167 MBH ≈ 80% - 30 15 P-1 BOILER RM HEATING WATER CIRC GRUNDFOS UMS 50-40 INLINE 40GPM 15' NEMA STANDARD 1/3 10 0 P-2 BOILER RM BOILER CIRCULATION TACO 007-BF3-1W INLINE 23GPM 10' NEMA STANDARD 1/25 10 0 P-3 BOILER RM BOILER CIRCULATION TACO 007-BF3-1W INLINE 23GPM 10' NEMA STANDARD 1/25 10 0 P-4 BOILER RM HEATING WATER CIRC GRUNDFOS UPS 15-42f INLINE 17GPM 15' NEMA STANDARD 1/25 10 0 FUR - 1 ROOM 114 GYM FORCED AIR FURNACE JERNLUND 74-37580 UPWARD FLOW FURNACE PROPANE FUEL 6500 CFM; 687.5 MBH ≈ 75% 3 18 0 EF-1 ROOF LOCKER/REST-ROOM EXHAUST - - ROOF MOUNTED 1050 CFM NEMA STANDARD 1/4 20 3 EF-2 ROOF KITCHEN EXHAUST PENN V12 ROOF MOUNTED 530 NEMA STANDARD 1/4 20 3 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES EF-3 ROOF FUR-1 EXHAUST - - ROOF MOUNTED 890 NEMA STANDARD 1/4 20 3 EF-4 ROOF RESTROOM EXHAUST - - ROOF MOUNTED 400 NEMA STANDARD 1/10 20 0 Moose Pass Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Appendix D Energy Conservation Measures Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Setback Thermostat: Gym Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gym space. $1,679 $1,000 22.98 0.6 2 Setback Thermostat: Classrooms Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Classrooms space. $1,457 $1,000 19.96 0.7 3 Lighting: Class/Heavy Use Office 2T8 Light Replace with 49 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $511 $721 10.92 1.4 4 Exterior Door: Shed Single Door Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $49 $467 2.52 9.5 5 Air Tightening Perform air sealing to reduce air leakage by 20%. $1,280 $6,000 2.03 4.7 6 Lighting: Class/Heavy Use Office 4T8 Light Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $19 $121 2.03 6.4 7 HVAC And DHW Replace four circulation pumps with electronically commutated motors $241 $1,680 1.82 7 8 Lighting: Kitchen Replace with 3 FLUOR CFL, Reflector 23W R25 $34 $120 1.81 3.5 9 Exterior Door: Shed - Double Door Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $119 $1,868 1.52 15.7 10 Exterior Door: Double Exterior Doors Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $391 $6,136 1.52 15.7 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 11 Lighting: Restroom Replace with 12 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $59 $601 1.52 10.1 12 Lighting: Gym Replace with 16 FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic and Add new Occupancy Sensor and Improve Manual Switching, Multi-Level Switch $273 $3,950 1.10 14.5 13 Lighting: Exterior Lighting Replace with 3 LED 50W Module StdElectronic $75 $1,125 1.02 15 14 Lighting: Restroom Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $19 $301 0.99 15.6 15 Window/Skylig ht: Double Pane glass - Not South Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $453 $36,660 0.22 80.9 16 Window/Skylig ht: Double Pane Glass - South Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $111 $9,730 0.20 87.7 17 Lighting: Utility/Storage Replace with FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic $1 $150 0.15 105.2 TOTAL $6,772 $71,629 1.35 10.6 * ECMs #1, #6, #11 and #16 in the Executive Summary at the beginning of the report were modeled with separate AkWarm models for each ECM, due to the modeling limitations of improvement items in AkWarm. As a result, ECMs #1, #6, #11 and #16 from the Executive Summary are not additive measures and therefore are not included in Appendix D. Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS 1. Building Envelope Insulation Rank Location Existing Type/R-Value Recommendation Type/R- Value Installe d Cost Annual Energy Savings Exterior Doors – Replacement Rank Location Size/Type/Condition Recommendation Installe d Cost Annual Energy Savings 4 Exterior Door: Shed Single Door 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. $467 $49 9 Exterior Door: Shed - Double Door 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. $1,868 $119 10 Exterior Door: Double Exterior 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. $6,136 $391 Windows and Glass Doors – Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 15 Window/Sk ylight: Double Pane glass - Not South Glass: Single pane with storm window Frame: Reinforced Vinyl/Alum-Clad Wood Spacing Between Layers: Quarter Inch Gas Fill Type: Air Modeled U-Value: 0.58 Solar Heat Gain Coefficient including Window Coverings: 0.46 Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $36,660 $453 16 Window/Sk ylight: Double Pane Glass - South Glass: Single pane with storm window Frame: Reinforced Vinyl/Alum-Clad Wood Spacing Between Layers: Quarter Inch Gas Fill Type: Air Modeled U-Value: 0.58 Solar Heat Gain Coefficient including Window Coverings: 0.46 Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $9,730 $111 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 5 Air Tightness estimated as: 1.10 cfm/ft2 of above-grade shell area at 75 Pascals Perform air sealing to reduce air leakage by 20%. $6,000 $1,280 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 2. Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 7 Replace four circulation pumps with electronically commutated motors $1,680 $241 Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 1 Gym Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gym space. $1,000 $1,679 2 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 $1,457 Ventilation Rank Recommendation Cost Annual Energy Savings 3. Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 3 Class/Heavy Use Office 2T8 Light 49 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Replace with 49 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $721 $511 Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 6 Class/Heavy Use Office 4T8 Light 2 FLUOR (4) T8 4' F32T8 32W Standard (2) Instant StdElectronic with Manual Switching Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $121 $19 8 Kitchen 3 INCAN A Lamp, Std 100W with Manual Switching Replace with 3 FLUOR CFL, Reflector 23W R25 $120 $34 11 Restroom 12 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Replace with 12 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $601 $59 12 Gym 16 MH 250 Watt StdElectronic with Manual Switching Replace with 16 FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic and Add new Occupancy Sensor and Improve Manual Switching, Multi- Level Switch $3,950 $273 13 Exterior Lighting 3 HPS 100 Watt StdElectronic with Manual Switching, Clock Timer or Other Scheduling Control, On/Off Photoswitch Replace with 3 LED 50W Module StdElectronic $1,125 $75 14 Restroom 2 FLUOR (4) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic and Add new Occupancy Sensor and Improve Manual Switching $301 $19 17 Utility/Stora ge INCAN A Lamp, Std 300W with Manual Switching Replace with FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic $150 $1 Refrigeration Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Rank Location Existing Recommended Installed Cost Annual Energy Savings Other Electrical Equipment Rank Location Existing Recommended Installed Cost Annual Energy Savings Cooking/Clothes Drying Rank Recommended Installed Cost Annual Energy Savings Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 Appendix E Site Visit Photos Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 1. Front of School 2. Back View of School. Gym Area Is On The Right Side of The Photograph. 3. Generator Shed and Storage Sheds 4. Through-Wall Unit Ventilator Opening 5. Operable Wood Framed Classroom Window 6. East Side Classroom Windows Moose Pass Elementary School Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm ID No. CIRI-52Z-CAEC-01 7. Through-Wall Unit Ventilator 8. Boilers B-1 and B-2 9. Forced Air Propane Furnace End of Report