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CIRI-SXQ-CAEC KPB Soldotna Skyview High School 2012-EE
ENERGY AUDIT REPORT Skyview High School 46188 Sterling Hwy. Soldotna, AK 99669 CAEC Project No. CIRI‐SXQ‐CAEC‐10 May 2012 SUBMITTED BY: PRIMARY CONTACT: 22010 SE 51st Street 32266 Lakefront Drive Issaquah, WA 98029 Soldotna, Alaska 99669 Phone (425)281‐4706 Fax (425)507‐4350 Phone (907) 260‐5311 Fax (907) 260‐5312 Email: andrew.waymire@siemens.com Email: akengineer@starband.net CONTACT: Andrew Waymire, C.E.M. CONTACT: Jerry P. Herring, P.E., C.E.A. 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. 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. 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. Siemens Industry, Inc (SII) 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. SII 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 3-10 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. Table of Contents REPORT DISCLAIMER.....................................................................................................................................2 1. EXECUTIVE SUMMARY..............................................................................................................................5 2. AUDIT AND ANALYSIS BACKGROUND.......................................................................................................9 3. Skyview High School‐Overview..............................................................................................................12 4. ENERGY COST SAVING MEASURES.........................................................................................................22 Appendix A – Major Equipment List ...........................................................................................................39 Appendix B – Lighting Inventory.................................................................................................................43 Appendix C – IR Photos...............................................................................................................................44 Appendix D – Utility Data............................................................................................................................45 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 5 of 51 1. EXECUTIVE SUMMARY This report was prepared for the Kenai Peninsula School District using ARRA funds as part of a contract for: Kenai Peninsula Borough Alaska Housing Finance Corporation Contact: Kevin Lyon Contact: Rebekah Luhrs 47140 East Poppy Lane P.O. Box 10120 Soldotna, Alaska 99669 Anchorage, Alaska 99510 Phone (907) 262‐9657 Phone (907)330‐8141 Email: klyon@borough.kenai.ak.us Email: rluhrs@ahfc.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 scope of the audit focused on Skyview High School. The scope of this report is a comprehensive energy study, which included an analysis of building shell, interior and exterior lighting systems, HVAC systems, and plug loads. Based on electricity and fuel oil prices in effect at the time of the audit, the annual predicted energy costs for the buildings analyzed are as follows: $229,043 for Electricity $63,007 for Natural Gas The total energy costs are $292,050 per year. Table 1.1 below summarizes the energy efficiency measures analyzed for the Skyview High School. Listed are the estimates of the annual savings, installed costs, and two different financial measures of investment return. Table 1.1 PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR1 Simple Payback (Years)2 1 Setback Thermostat: Skyview High School Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Skyview High School space. $16,530 $9,000 23.34 0.5 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 6 of 51 Table 1.1 PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR1 Simple Payback (Years)2 2 Lighting: Hallways Replace with FLUOR CFL, Reflector 26W PAR38 $42 $35 7.68 0.8 3 Lighting: Classrooms Replace with 12 FLUOR CFL, Reflector 26W PAR38 $294 $420 4.46 1.4 4 Lighting: Exterior Replace with 20 40W Induction $1,490 $10,869 2.64 7.3 5 Lighting: Offices Replace with 8 FLUOR CFL, Plug-in 18W Quad Tube StdElectronic $100 $253 2.50 2.5 6 Ventilation Retro-Commission Existing Systems. Price includes 75000 for system review and $50000 for revisions. Add demand ventilation for Gym. Add VFD to bldg pressure EX Fans F-6. $22,485 $125,000 2.26 5.6 7 Lighting: Main Gym Replace with 40 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic $4,710 $23,854 2.41 5.1 8 Lighting: Hallways Add new Occupancy Sensor $90 $500 2.19 5.6 9 Lighting: Cafeteria Replace with 15 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic $1,517 $8,945 2.07 5.9 10 Lighting: Pool Replace with 42 200 W Induction $3,309 $31,500 1.99 9.5 11 Lighting: Exterior Replace with 49 200W Induction $4,668 $47,520 1.89 10.2 12 HVAC And DHW Repalce Pump Motors with High Efficiency Motors. Replace gym fan motor with high efficiency and VFD + Demand Ventilation $6,293 $60,000 1.57 9.5 13 Lighting: Hallways Add new Occupancy Sensor $123 $1,000 1.50 8.1 14 Lighting: Small Gym Replace with 20 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic $1,318 $10,681 1.50 8.1 15 Lighting: Hallways Add new Occupancy Sensor $1,331 $11,000 1.47 8.3 16 Lighting: Exterior Replace with 7 40W Induction $271 $3,804 1.37 14.1 17 Lighting: 2nd Floor Atrium Hallway Replace with 11 120W Induction $577 $8,105 1.35 14.0 18 Lighting: Restrooms Add new Occupancy Sensor $42 $500 1.03 11.8 19 Lighting: Exterior Replace with 17 80W Induction $583 $10,994 1.02 18.8 TOTAL, cost-effective measures $65,774 $363,980 2.50 5.5 The following measures were not found to be cost-effective: 20 Lighting: Offices Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $33 $413 0.96 12.7 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 7 of 51 Table 1.1 PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR1 Simple Payback (Years)2 21 Lighting: Weight Room Replace with 20 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $206 $2,659 0.94 12.9 22 Lighting: Offices Replace with 8 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $60 $825 0.89 13.8 23 Lighting: Library Replace with 12 200W Induction $533 $11,638 0.87 21.8 24 Lighting: Main Gym Add new Occupancy Sensor $698 $10,972 0.77 15.7 25 Lighting: Vocational Shops Replace with 53 FLUOR (4) T8 4' F32T8 32W Standard (2) Instant StdElectronic $1,724 $28,304 0.74 16.4 26 Lighting: Pool Locker rooms Add new Occupancy Sensor $224 $4,000 0.68 17.9 27 Lighting: Small Gym Add new Occupancy Sensor $246 $4,973 0.60 20.3 28 Lighting: Locker Room Add new Occupancy Sensor $235 $5,000 0.57 21.2 29 Lighting: Storage Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $5 $206 0.26 45.3 30 Lighting: Restrooms Add new Occupancy Sensor $10 $500 0.24 49.8 31 Lighting: Mechanical Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $4 $206 0.24 52.2 32 Lighting: Entry Area Replace with 3 200W Induction $549 $49,520 0.21 90.2 33 Lighting: Restrooms Controls retrofit $0 $1,500 0.00 999.9 34 Lighting: Restrooms Controls retrofit $0 $500 0.00 999.9 TOTAL, all measures $70,299 $485,197 2.00 6.9 Table Notes: 1 Savings to Investment Ratio (SIR) is a life‐cycle cost measure calculated by dividing the total savings over the life of a project (expressed in today’s dollars) by its investment costs. The SIR is an indication of the profitability of a measure; the higher the SIR, the more profitable the project. An SIR greater than 1.0 indicates a cost‐effective project (i.e. more savings than cost). Remember that this profitability is based on the position of that Energy Efficiency Measure (EEM) in the overall list and assumes that the measures above it are implemented first. 2 Simple Payback (SP) is a measure of the length of time required for the savings from an EEM to payback the investment cost, not counting interest on the investment and any future changes in energy prices. It is calculated by dividing the investment cost by the expected first‐year savings of the EEM. With all of these energy efficiency measures in place, the annual utility cost can be reduced by $70,299 per year, or 24.1% of the buildings’ total energy costs. These measures are estimated to cost $485,197, for an overall simple payback period of 6.9 years. If only the cost‐effective Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 8 of 51 measures are implemented, the annual utility cost can be reduced by $65,774 per year, or 22.5% of the buildings’ total energy costs. These measures are estimated to cost $363,980, for an overall simple payback period of 5.5 years. Table 1.2 below is a breakdown of the annual energy cost across various energy end use types, such as Space Heating and Water Heating. The first row in the table shows the breakdown for the building as it is now. The second row shows the expected breakdown of energy cost for the building assuming all of the retrofits in this report are implemented. Finally, the last row shows the annual energy savings that will be achieved from the retrofits. Table 1.2 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 $204,754 $0 $938 $72,729 $0 $3,679 $299 $72 $6,468 $3,113 $292,050 With All Proposed Retrofits $172,099 $0 $0 $42,517 $0 $3,653 $299 $72 $0 $3,113 $221,751 SAVINGS $32,655 $0 $938 $30,212 $0 $26 $0 $0 $6,468 $0 $70,299 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 9 of 51 2. AUDIT AND ANALYSIS BACKGROUND 2.1 Program Description This audit included services to identify, develop, and evaluate energy efficiency measures at the Skyview High School. The scope of this project included evaluating building shell, lighting and other electrical systems, and HVAC equipment, motors and pumps. Measures were analyzed based on life‐cycle‐cost techniques, which include the initial cost of the equipment, life of the equipment, annual energy cost, annual maintenance cost, and a discount rate of 3.0%/year in excess of general inflation. 2.2 Audit Description Preliminary audit information was gathered in preparation for the site survey. The site survey provides critical information in deciphering where energy is used and what opportunities exist within a building. The entire site was surveyed to inventory the following to gain an understanding of how each building operates: • Building envelope (roof, windows, etc.) • Heating, ventilation, and air conditioning equipment (HVAC) • Lighting systems and controls • Building‐specific equipment • Water consumption, treatment (optional) & disposal The building site visit was performed to survey all major building components and systems. The site visit included detailed inspection of energy consuming components. Summary of building occupancy schedules, operating and maintenance practices, and energy management programs provided by the building manager were collected along with the system and components to determine a more accurate impact on energy consumption. Details collected from Skyview High School enable a model of the building’s energy usage to be developed, highlighting the building’s total energy consumption, energy consumption by specific building component, and equivalent energy cost. The analysis involves distinguishing the different fuels used on site, and analyzing their consumption in different activity areas of the building. Skyview High School is classified as being made up of the following activity areas: 1) Skyview High School: 90,300 square feet Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 10 of 51 In addition, the methodology involves taking into account a wide range of factors specific to the building. These factors are used in the construction of the model of energy used. The factors include: • Occupancy hours • Local climate conditions • Prices paid for energy 2.3. Method of Analysis Data collected was processed using AkWarm© Energy Use Software to estimate energy savings for each of the proposed energy efficiency measures (EEMs). The recommendations focus on the building envelope; HVAC; lighting, plug load, and other electrical improvements; and motor and pump systems that will reduce annual energy consumption. EEMs are evaluated based on building use and processes, local climate conditions, building construction type, function, operational schedule, existing conditions, and foreseen future plans. Energy savings are calculated based on industry standard methods and engineering estimations. Our analysis provides a number of tools for assessing the cost effectiveness of various improvement options. These tools utilize Life‐Cycle Costing, which is defined in this context as a method of cost analysis that estimates the total cost of a project over the period of time that includes both the construction cost and ongoing maintenance and operating costs. Savings to Investment Ratio (SIR) = Savings divided by Investment Savings includes the total discounted dollar savings considered over the life of the improvement. When these savings are added up, changes in future fuel prices as projected by the Department of Energy are included. Future savings are discounted to the present to account for the time‐value of money (i.e. money’s ability to earn interest over time). The Investment in the SIR calculation includes the labor and materials required to install the measure. An SIR value of at least 1.0 indicates that the project is cost‐effective—total savings exceed the investment costs. Simple payback is a cost analysis method whereby the investment cost of a project is divided by the first year’s savings of the project to give the number of years required to recover the cost of the investment. This may be compared to the expected time before replacement of the system or component will be required. For example, if a boiler costs $12,000 and results in a savings of $1,000 in the first year, the payback time is 12 years. If the boiler has an expected life to replacement of 10 years, it would not be financially viable to make the investment since the payback period of 12 years is greater than the project life. The Simple Payback calculation does not consider likely increases in future annual savings due to energy price increases. As an offsetting simplification, simple payback does not consider the need to earn interest on the investment (i.e. it does not consider the time‐value of money). Because of these simplifications, the SIR figure is considered to be a better financial investment indicator than the Simple Payback measure. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 11 of 51 Measures are implemented in order of cost‐effectiveness. The program first calculates individual SIRs, and ranks all measures by SIR, higher SIRs at the top of the list. An individual measure must have an individual SIR>=1 to make the cut. Next the building is modified and re‐ simulated with the highest ranked measure included. Now all remaining measures are re‐ evaluated and ranked, and the next most cost‐effective measure is implemented. AkWarm goes through this iterative process until all appropriate measures have been evaluated and installed. It is important to note that the savings for each recommendation is calculated based on implementing the most cost effective measure first, and then cycling through the list to find the next most cost effective measure. Implementation of more than one EEM often affects the savings of other EEMs. The savings may in some cases be relatively higher if an individual EEM is implemented in lieu of multiple recommended EEMs. For example implementing a reduced operating schedule for inefficient lighting will result in relatively high savings. Implementing a reduced operating schedule for newly installed efficient lighting will result in lower relative savings, because the efficient lighting system uses less energy during each hour of operation. If multiple EEM’s are recommended to be implemented, AkWarm calculates the combined savings appropriately. Cost savings are calculated based on estimated initial costs for each measure. Installation costs include labor and equipment to estimate the full up‐front investment required to implement a change. Costs are derived from Means Cost Data, industry publications, and local contractors and equipment suppliers. 2.4 Limitations of Study All results are dependent on the quality of input data provided, and can only act as an approximation. In some instances, several methods may achieve the identified savings. This report is not intended as a final design document. The design professional or other persons following the recommendations shall accept responsibility and liability for the results. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 12 of 51 3. Skyview High SchoolOverview 3.1. Building Description The 90,300 square foot Skyview High School was constructed in the 1980s, with a normal occupancy of approximately 500 people. The number of hours of operation for this building average 6.2 hours per day, considering all seven days of the week. Skyview High School is comprised of typical classrooms, library, cafeteria with kitchen, theater, vocational classrooms, gymnasium, and pool. Description of Building Shell The exterior walls are typically constructed of 8” concrete block, vapor retarder, 4” rigid insulation, and second masonry layer of 6” concrete block. The second floor is a double‐ strapped masonry wall consisting of 8” concrete block, vapor retarder, 3x4 frame with 2.5” of rigid insulation, 3x4 frame with 1.5” rigid insulation, air space, and preformed exterior metal wall. The Roof of the building is constructed of a metal deck, 1.5” perlite insulation, EPDM membrane, 4” plastic foam insulation, 2” mortar faced foam insulation, and concrete perimeter pavers. The Floor/Foundation of the building is constructed concrete slab. Typical windows throughout the building are double‐paned glass wind thermally broken aluminum frames. Doors are metal or half lite metal with interior insulation. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 13 of 51 Description of Heating and Cooling Plants The Heating Plants used in the building are: How Water Boiler Nameplate Information: Weil McLain Fuel Type: Natural Gas Input Rating: 2 x 8,660,000 BTU/hr Steady State Efficiency: 70 % Idle Loss: 1.5 % Heat Distribution Type: Water Boiler Operation: Aug ‐ Jul Notes: 7.5hp burner blower Space Heating and Cooling Distribution Systems The building is heated by two (2) 8,660 MBH in / 6,660 MBH out Weil‐McLain Boilers that run for most of the school year. Hot water is distributed by multiple distributions pumps that serve numerous air handling units and distribution fans. An 80,000 CFM, 200 HP fan supplies air to VAV and fan powered boxes serving a majority of classrooms and offices. Some mostly non‐traditional classroom areas are served by dedicated constant volume (CV) systems. The gymnasium’s dedicated CV air handling unit has both a 20 HP and 5 HP motor which are used for start up and occupied modes, respectively. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 14 of 51 Six (2) 2HP fans located in the fan room turn on and off in sequence to balance building pressure. Each fan has a louver with a gravity damper. The building is controlled by a combination pneumatic‐DDC system. Most of the mechanical systems in the field are pneumatically controlled, while the mechanical rooms have DDC. Domestic Hot Water System Two (2) 750 gallon domestic hot water tanks with a heat exchanger that feeds off of the main hot water line are located in the boiler room. One of the tanks has been shut off. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 15 of 51 Waste Heat Recovery Information The pool AHU utilizes a heat recovery loop consisting of a coil installed in the exhaust air stream and a pre‐heat coil located in the fresh air intake. These two coils are connected via an inline pump and associated piping configured to create a heat recovery loop. A solution consisting of a water and glycol mixture is circulated between these coils and serves to capture heat typically lost in the exhaust air, recovers this energy and delivers it into the cold fresh air stream to preheat the incoming air. Description of Building Ventilation System The existing building ventilation system consists of numerous constant volume exhaust fans. These fans vary in their operational schedule or controls. The majority of fan systems are scheduled to operate via the existing Honeywell DDC system. These systems appear to operate on days when school may not be in session or during summer periods if maintenance personnel do not initialize a special or holiday schedule. Large space fans such as those serving the gymnasium operate during unoccupied periods and also deliver excess outside air in relation to actual space occupancy. Building pressure is controlled by system F‐6 that consists of 6 propeller type fans. During the site inspection, we observed frequent short cycling of these fans and back draft dampers that were in operable. Lighting Lighting is primarily T8 linear fluorescent lamps with electronic ballasts and manual switching. The gymnasium and cafeteria use 400W metal halide lamps, the pool area and the vocational shops use 250W metal halide lamps, and the exterior lighting consists of metal halide lamps of various wattages. Plug Loads Classrooms and offices have typical plug loads that included computers, printers, and copy machines. The kitchen has numbers commercial sized kitchen appliances such as stove, heaters, warming table, dishwashers, as well as a walk‐in refrigerator and walk‐in freezer. The vocational classrooms have a variety of energy intensive tools such as table saws, drills and welders. Major Equipment The equipment list, available in Appendix A, is composed of major energy consuming equipment which through energy conservation measures could yield substantial energy savings. The list shows the major equipment in the building and pertinent information utilized in energy savings calculations. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 16 of 51 3.2 Predicted Energy Use 3.2.1 Energy Usage / Tariffs The electric usage profile charts (below) represents the predicted electrical usage for the building. If actual electricity usage records were available, the model used to predict usage was calibrated to approximately match actual usage. The electric utility measures consumption in kilowatt‐hours (kWh) and maximum demand in kilowatts (kW). One kWh usage is equivalent to 1,000 watts running for one hour. One KW of electric demand is equivalent to 1,000 watts running at a particular moment. The basic usage charges are shown as generation service and delivery charges along with several non‐utility generation charges. The natural gas usage profile shows the predicted natural gas energy usage for the building. If actual gas usage records were available, the model used to predict usage was calibrated to approximately match actual usage. Natural gas is sold to the customer in units of 100 cubic feet (CCF), which contains approximately 100,000 BTUs of energy. The propane usage profile shows the propane usage for the building. Propane is sold by the gallon or by the pound, and its energy value is approximately 91,800 BTUs per gallon. The fuel oil usage profile shows the fuel oil usage for the building. Fuel oil consumption is measured in gallons. One gallon of #1 Fuel Oil provides approximately 132,000 BTUs of energy. The following is a list of the utility companies providing energy to the building and the class of service provided: Electricity: Homer Electric Assn (Homer) ‐ Commercial ‐ Lg Natural Gas: Enstar Natural Gas ‐ Commercial ‐ Lg The average cost for each type of fuel used in this building is shown below in Table 3.1. This figure includes all surcharges, subsidies, and utility customer charges: Table 3.1 – Average Energy Cost Description Average Energy Cost Electricity $ 0.1389/kWh Natural Gas $ 0.70/ccf 3.2.1.1 Total Energy Use and Cost Breakdown At current rates, Kenai Peninsula Borough pays approximately $292,050 annually for electricity and other fuel costs for the Skyview High School. Figure 3.1 below reflects the estimated distribution of costs across the primary end uses of energy based on the AkWarm© computer simulation. Comparing the “Retrofit” bar in the Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 17 of 51 figure to the “Existing” bar shows the potential savings from implementing all of the energy efficiency measures shown in this report. Figure 3.1 Annual Energy Costs by End Use $0 $50,000 $100,000 $150,000 $200,000 $250,000 $300,000 Existing Retrofit Service Fees Ventilation and Fans Space Heating Other Electrical Lighting Domestic Hot Water Cooking Clothes Drying Annual Energy Costs by End Use Figure 3.2 below shows how the annual energy cost of the building splits between the different fuels used by the building. The “Existing” bar shows the breakdown for the building as it is now; the “Retrofit” bar shows the predicted costs if all of the energy efficiency measures in this report are implemented. Figure 3.2 Annual Energy Costs by Fuel Type $0 $50,000 $100,000 $150,000 $200,000 $250,000 $300,000 Existing Retrofit Natural Gas Electricity Annual Energy Costs by Fuel Figure 3.3 below addresses only Space Heating costs. The figure shows how each heat loss component contributes to those costs; for example, the figure shows how much annual space heating cost is caused by the heat loss through the Walls/Doors. For each component, the space heating cost for the Existing building is shown (blue bar) and the space heating cost assuming all retrofits are implemented (yellow bar) are shown. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 18 of 51 Figure 3.3 Annual Space Heating Cost by Component The tables below show AkWarm’s estimate of the monthly fuel use for each of the fuels used in the building. For each fuel, the fuel use is broken down across the energy end uses. Note, in the tables below “DHW” refers to Domestic Hot Water heating. Electrical Consumption (kWh) Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Lighting 46374 42260 46374 44878 46374 44878 37040 37040 44577 46374 44878 45334 Other_Electrical 2718 2477 2718 2630 2718 2630 0 0 2543 2718 2630 2718 Cooking 0 0 0 0 0 0 0 0 0 0 0 0 Clothes_Drying 0 0 0 0 0 0 0 0 0 0 0 0 Ventilation_Fans 3751 3419 3751 3630 3751 3630 5688 5688 3693 3751 3630 2583 DHW 26 24 26 25 26 25 26 26 25 26 25 26 Space_Heating 91892 83374 91146 87380 89671 86256 79956 79978 86135 90168 88125 90944 Space_Cooling 0 0 0 0 0 0 0 0 0 0 0 0 Natural Gas Consumption (ccf) Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Cooking 44 40 44 43 44 43 0 0 43 44 43 44 Clothes_Drying 11 10 11 10 11 10 0 0 10 11 10 11 DHW 100 92 102 103 114 129 116 116 119 108 99 103 Space_Heating 12970 10507 10296 7001 4999 2946 4617 4698 3632 6784 9674 9570 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 19 of 51 3.2.2 Energy Use Index (EUI) Energy Use Index (EUI) is a measure of a building’s annual energy utilization per square foot of building. This calculation is completed by converting all utility usage consumed by a building for one year, to British Thermal Units (Btu) or kBtu, 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 for similar building types. The Oak Ridge National Laboratory (ORNL) Buildings Technology Center under a contract with the U.S. Department of Energy maintains a Benchmarking Building Energy Performance Program. The ORNL website determines how a building’s energy use compares with similar facilities throughout the U.S. and in a specific region or state. Source use differs from site usage when comparing a building’s energy consumption with the national average. Site energy use is the energy consumed by the building at the building site only. Source energy use includes the site energy use as well as all of the losses to create and distribute the energy to the building. Source energy represents the total amount of raw fuel that is required to operate the building. It incorporates all transmission, delivery, and production losses, which allows for a complete assessment of energy efficiency in a building. The type of utility purchased has a substantial impact on the source energy use of a building. The EPA has determined that source energy is the most comparable unit for evaluation purposes and overall global impact. Both the site and source EUI ratings for the building are provided to understand and compare the differences in energy use. The site and source EUIs for this building are calculated as follows. (See Table 3.4 for details): Building Site EUI = (Electric Usage in kBtu + Gas Usage in kBtu + similar for other fuels) Building Square Footage Building Source EUI = (Electric Usage in kBtu X SS Ratio + Gas Usage in kBtu X SS Ratio + similar for other fuels) Building Square Footage where “SS Ratio” is the Source Energy to Site Energy ratio for the particular fuel. Table 3.4 Skyview High School EUI Calculations Energy Type Building Fuel Use per Year Site Energy Use per Year, kBTU Source/Site Ratio Source Energy Use per Year, kBTU Electricity 1,645,178 kWh 5,614,993 3.340 18,754,080 Natural Gas 89,530 ccf 8,953,013 1.047 9,373,805 Total 14,568,006 28,127,881 BUILDING AREA 90,300 Square Feet BUILDING SITE EUI 161 kBTU/Ft²/Yr BUILDING SOURCE EUI 311 kBTU/Ft²/Yr * Site ‐ Source Ratio data is provided by the Energy Star Performance Rating Methodology for Incorporating Source Energy Use document issued March 2011. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 20 of 51 3.3 AkWarm© Building Simulation An accurate model of the building performance can be created by simulating the thermal performance of the walls, roof, windows and floors of the building. The HVAC system and central plant are modeled as well, accounting for the outside air ventilation required by the building and the heat recovery equipment in place. The model uses local weather data and is trued up to historical energy use to ensure its accuracy. The model can be used now and in the future to measure the utility bill impact of all types of energy projects, including improving building insulation, modifying glazing, changing air handler schedules, increasing heat recovery, installing high efficiency boilers, using variable air volume air handlers, adjusting outside air ventilation and adding cogeneration systems. For the purposes of this study, the Skyview High School was modeled using AkWarm© energy use software to establish a baseline space heating and cooling energy usage. Climate data from Soldotna was used for analysis. From this, the model was be calibrated to predict the impact of theoretical energy savings measures. Once annual energy savings from a particular measure were predicted and the initial capital cost was estimated, payback scenarios were approximated. Equipment cost estimate calculations are provided in Appendix D. Limitations of AkWarm© Models • The model is based on typical mean year weather data for Soldotna. This data represents the average ambient weather profile as observed over approximately 30 years. As such, the gas and electric profiles generated will not likely compare perfectly with actual energy billing information from any single year. This is especially true for years with extreme warm or cold periods, or even years with unexpectedly moderate weather. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 21 of 51 Figure 3.4 Difference in Weather Data • The heating and cooling load model is a simple two‐zone model consisting of the building’s core interior spaces and the building’s perimeter spaces. This simplified approach loses accuracy for buildings that have large variations in cooling/heating loads across different parts of the building. • The model does not model HVAC systems that simultaneously provide both heating and cooling to the same building space (typically done as a means of providing temperature control in the space). The energy balances shown in Section 3.1 were derived from the output generated by the AkWarm© simulations. Soldotna, AK Weather Data -20 -10 0 10 20 30 40 50 60 70 80 5/17/2009 7/6/2009 8/25/2009 10/14/2009 12/3/2009 1/22/2010 3/13/2010 5/2/2010 6/21/2010 8/10/2010 DateDry Bulb Temperature (F)Actual Dry Bulb (F)TMY3 Dry Bulb (F) Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 22 of 51 4. ENERGY COST SAVING MEASURES 4.1 Summary of Results The energy saving measures are summarized in Table 4.1. Please refer to the individual measure descriptions later in this report for more detail. Calculations and cost estimates for analyzed measures are provided in Appendix C. Table 4.1 Skyview High School, Soldotna, Alaska PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR Simple Payback (Years) 1 Setback Thermostat: Skyview High School Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Skyview High School space. $16,530 $9,000 23.34 0.5 2 Lighting: Hallways Replace with FLUOR CFL, Reflector 26W PAR38 $42 $35 7.68 0.8 3 Lighting: Classrooms Replace with 12 FLUOR CFL, Reflector 26W PAR38 $294 $420 4.46 1.4 4 Lighting: Exterior Replace with 20 40W Induction $1,490 $10,869 2.64 7.3 5 Lighting: Offices Replace with 8 FLUOR CFL, Plug-in 18W Quad Tube StdElectronic $100 $253 2.50 2.5 6 Ventilation Retro-Commission Existing Systems. Price includes 75000 for system review and $50000 for revisions. Add demand ventilation for Gym. Add VFD to bldg pressure EX Fans F-6. $22,485 $125,000 2.26 5.6 7 Lighting: Main Gym Replace with 40 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic $4,710 $23,854 2.41 5.1 8 Lighting: Hallways Add new Occupancy Sensor $90 $500 2.19 5.6 9 Lighting: Cafeteria Replace with 15 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic $1,517 $8,945 2.07 5.9 10 Lighting: Pool Replace with 42 200 W Induction $3,309 $31,500 1.99 9.5 11 Lighting: Exterior Replace with 49 200W Induction $4,668 $47,520 1.89 10.2 12 HVAC And DHW Repalce Pump Motors with High Efficiency Motors. Replace gym fan motor with high efficiency and VFD + Demand Ventilation $6,293 $60,000 1.57 9.5 13 Lighting: Hallways Add new Occupancy Sensor $123 $1,000 1.50 8.1 14 Lighting: Small Gym Replace with 20 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic $1,318 $10,681 1.50 8.1 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 23 of 51 Table 4.1 Skyview High School, Soldotna, Alaska PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR Simple Payback (Years) 15 Lighting: Hallways Add new Occupancy Sensor $1,331 $11,000 1.47 8.3 16 Lighting: Exterior Replace with 7 40W Induction $271 $3,804 1.37 14.1 17 Lighting: 2nd Floor Atrium Hallway Replace with 11 120W Induction $577 $8,105 1.35 14.0 18 Lighting: Restrooms Add new Occupancy Sensor $42 $500 1.03 11.8 19 Lighting: Exterior Replace with 17 80W Induction $583 $10,994 1.02 18.8 TOTAL, cost-effective measures $65,774 $363,980 2.50 5.5 The following measures were not found to be cost-effective: 20 Lighting: Offices Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $33 $413 0.96 12.7 21 Lighting: Weight Room Replace with 20 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $206 $2,659 0.94 12.9 22 Lighting: Offices Replace with 8 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $60 $825 0.89 13.8 23 Lighting: Library Replace with 12 200W Induction $533 $11,638 0.87 21.8 24 Lighting: Main Gym Add new Occupancy Sensor $698 $10,972 0.77 15.7 25 Lighting: Vocational Shops Replace with 53 FLUOR (4) T8 4' F32T8 32W Standard (2) Instant StdElectronic $1,724 $28,304 0.74 16.4 26 Lighting: Pool Locker rooms Add new Occupancy Sensor $224 $4,000 0.68 17.9 27 Lighting: Small Gym Add new Occupancy Sensor $246 $4,973 0.60 20.3 28 Lighting: Locker Room Add new Occupancy Sensor $235 $5,000 0.57 21.2 29 Lighting: Storage Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $5 $206 0.26 45.3 30 Lighting: Restrooms Add new Occupancy Sensor $10 $500 0.24 49.8 31 Lighting: Mechanical Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic $4 $206 0.24 52.2 32 Lighting: Entry Area Replace with 3 200W Induction $549 $49,520 0.21 90.2 33 Lighting: Restrooms Controls retrofit $0 $1,500 0.00 999.9 34 Lighting: Restrooms Controls retrofit $0 $500 0.00 999.9 TOTAL, all measures $70,299 $485,197 2.00 6.9 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 24 of 51 4.2 Interactive Effects of Projects The savings for a particular measure are calculated assuming all recommended EEMs coming before that measure in the list are implemented. If some EEMs are not implemented, savings for the remaining EEMs will be affected. For example, if ceiling insulation is not added, then savings from a project to replace the heating system will be increased, because the heating system for the building supplies a larger load. In general, all projects are evaluated sequentially so energy savings associated with one EEM would not also be attributed to another EEM. By modeling the recommended project sequentially, the analysis accounts for interactive affects among the EEMs and does not “double count” savings. Interior lighting, plug loads, facility equipment, and occupants generate heat within the building. When the building is in cooling mode, these items contribute to the overall cooling demands of the building; therefore, lighting efficiency improvements will reduce cooling requirements in air‐conditioned buildings. Conversely, lighting‐efficiency improvements are anticipated to slightly increase heating requirements. Heating penalties and cooling benefits were included in the lighting project analysis. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 25 of 51 4.3 Building Shell Measures No building shell improvements are recommended at this time. Primarily Envelope Measures such as windows, doors, weather stripping, and insulation are only considered cost effective if there is a visible deficiency which is noted during the audit. However it is recommended that any time the facility replaces doors or windows that it uses a replacement with a high efficiency rating. Also when renovating or constructing additions to the facility a energy cost analysis should be taken when determining if a material with a greater R‐value should be used instead of that of the code requirements. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 26 of 51 4.4 Mechanical Equipment Measures 4.4.1 Heating/Cooling/Domestic Hot Water Measure Pump Motor Replacement Observations Many of the existing pumps in the school are driven by standard efficiency motors and are approaching the end of their useful life. These motors have poor efficiency profiles when compared to the energy efficient models available today. The motor sizes and run times of these units make them ideal candidates for replacement with new, energy efficient motors. Recommendations Siemens recommends replacing existing pump motors with new premium efficiency units. Energy‐ efficient motors, also called premium or high‐efficiency motors, are 2% to 8% more efficient than standard motors. Motors qualify as “energy‐efficient” if they meet or exceed the efficiency levels listed in the National Electric Manufacturers Association’s (NEMA’s) MG1‐1993 publication. Energy‐efficient motors owe their higher performance to key design improvements and more accurate manufacturing tolerances. Lengthening the core and using lower‐electrical‐loss steel, thinner stator laminations, and more copper in the windings reduce electrical losses. Improved bearings and a smaller, more aerodynamic cooling fan further increase efficiency. Energy‐efficient motors can play a major role in reducing facility operating costs. They should be considered for all new installations, replacement of failed motors, or as spares. They are frequently a cost‐effective alternative to rewinding, and are sometimes an economic substitute for well‐functioning motors in high‐duty applications. Efficiency measures include: • Matching the motor to the load • Providing shutoff controls to allow unnecessary motors to be shut off during non‐peak times • Instituting a good maintenance program to ensure that motors are clean, properly lubricated, and maintained according to manufacturer specifications Benefits include: • Decreased energy costs and faster payback • Longer insulation and bearing life • Lower heat output • Less vibration Rank Recommendation 12 Repalce Pump Motors with High Efficiency Motors. Replace gym fan motor with high efficiency and VFD + Demand Ventilation Installation Cost $60,000 Estimated Life of Measure (yrs)20 Energy Savings (/yr) $6,293 Breakeven Cost $94,034 Savings‐to‐Investment Ratio 1.6 Simple Payback yrs 10 Auditors Notes: Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 27 of 51 • More tolerant of overload conditions and phase imbalance, resulting in lower failure rates and longer warranties Gymnasium AHU Modifications and Demand Control Ventilation Observation The gymnasium air handling unit currently has two motors, one is meant for start up and the other for the occupancy mode. The existing gymnasium air handling unit supplies air to the space and has minimum requirements of outside air. This amount of required outside air varies based on occupancy. The more people in the space, the more outside air should be delivered. The occupancy of these spaces varies throughout the day, but the minimum amount of outside air delivered to the space remains constant. Recommendations Siemens recommends replacing both gymnasium fan motors with a single appropriately sized premium efficiency motor. High efficiency motors should be considered when installing variable frequency drives. Some standard duty motors may not function well with the VFD inverters. Siemens recommends installing a variable frequency drive (VFD) on select gym fan motors. VFDs control airflow by varying the speed of the motor based on the differential pressure set point of the system. This form of control results in significant motor energy savings because the motor only uses the energy required to satisfy the load. Siemens also recommends using carbon dioxide (CO2) sensors in the return air streams of the air handling unit to monitor the percentage of CO2 in gymnasium. Based on that percentage the outside air, return air and exhaust air dampers can be more tightly controlled to supply the space with the proper amount of ventilation without conditioning outside air that is not required. This type of control, called demand ventilation, is a newer concept and offers a means of optimizing the amount of ventilation required for a building or space. Energy savings are achieved by limiting the volume of outside air that must be conditioned. Demand control ventilation (DCV) is a control strategy that adjusts the amount of outside air based on the number of occupants and the ventilation needs of those occupants. Not heating or cooling unnecessary quantities of outside air conserves energy. Ventilation is based on the needs of the occupants of the space rather than using a fixed strategy based on design occupancy. DCV modulates ventilation to maintain target cfm‐per‐person ventilation rates based on actual occupancy. CO2 is used as an occupancy indicator to modulate ventilation below the maximum total outdoor air intake rate while maintaining the required ventilation rate per person. DCV avoids excessive over‐ventilation while still maintaining good ventilation and providing required cfm‐per‐person outside air requirements specified by local codes and standards. To accomplish demand control ventilation, the pneumatic controls on the gymnasium air handling unit would be replaced with a DDC system. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 28 of 51 4.4.2 Ventilation System Measures Retro-Commissioning Recommendations The retro commissioning process would include analyzing major equipment throughout the building and identifying operational and equipment deficiencies. Over time, equipment set points and schedules may no longer fit the needs of the building or its occupants. Additionally, equipment deficiencies, such as dampers or actuators that are no longer properly operating, can be corrected at this time. Retro‐ Commissioning would also include: • Optimizing minimum outdoor air intake through air handling units. • Program discharge air temperature (DAT) reset schedules to conserve heating, cooling, and fan energy of all air‐handling units • Provide supply air static pressure reset schedules to conserve fan electric energy • Program mixed air temperature (MAT) reset schedules in accordance with DAT reset schedules • Add VFD to fans F‐6 and operate them in parallel to control building pressure via the DDC system. • Calibrate MAT and DAT sensors and feed associated DDC control loops • Calibrate economizer cycle operation of AHUs • Provide new control sequences for all AHUs and unit ventilators. Rank Description Recommendation 6 Retro‐Commission Existing Systems. Price includes 75000 for system review and $50000 for revisions. Add demand ventilation for Gym. Add VFD to bldg pressure EX Fans F‐6. Installation Cost $125,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $22,485 Breakeven Cost $282,841 Savings‐to‐Investment Ratio 2.3 Simple Payback yrs 6 Auditors Notes: Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 29 of 51 4.4.3 Night Setback Thermostat Measures Night Setback Observations Currently there is no unoccupied space temperature setback. The space temperatures are maintained at levels above what is needed when the space is unoccupied. Recommendations Siemens recommends installing controls and programming to schedule the space temperature for unoccupied times to 60°F during the heating season. This will reduce the energy required to maintain the space temperature during unoccupied times. Efficiency measures include: • Installing new controls • Providing programming to schedule a space temperature setback Benefits include: • Decreased energy costs and faster payback • Lower heat output Rank Building Space Recommendation 1 Skyview High School Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Skyview High School space. Installation Cost $9,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $16,530 Breakeven Cost $210,026 Savings‐to‐Investment Ratio 23.3 Simple Payback yrs 1 Auditors Notes: Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 30 of 51 4.5 Electrical & Appliance Measures 4.5.1 Lighting Measures The goal of this section is to present any lighting energy conservation measures that may also be cost beneficial. It should be noted that replacing current bulbs with more energy‐efficient equivalents will have a small effect on the building heating and cooling loads. The building cooling load will see a small decrease from an upgrade to more efficient bulbs and the heating load will see a small increase, as the more energy efficient bulbs give off less heat. Occupancy Sensors Observations Currently, the lights in the gymnasiums, hallways, restrooms and locker rooms are controlled locally by wall switches. These switches allow the teachers, staff and students to turn the light fixtures on and off as required. However, there are times when lights are left on even though the rooms are unoccupied. Recommendations Siemens recommends installing motion/occupancy sensors to turn the lights on and off based on the use of the space. The sensors could be mounted on the ceiling in some areas so that the entire area is sensed. The sensing device would be a dual technology infrared and ultrasonic device. This would sense both noise and motion. The sensors also have time and sensitivity adjustments. Exterior Lighting Observations Exterior building and parking lot lighting consists of metal halide fixtures of varying wattages. Recommendations It is recommended that the existing exterior metal halide fixtures be replaced with more energy efficient induction lighting fixtures. These systems offer superior light rendering and over 100,000 hours of useful life. This long operational equipment life considerably reduces necessary maintenance and equipment replacement. Metal Halide Lighting Observations Numerous areas within the school have metal halide lighting that is inefficient and that requires lengthy start up times. These areas include the main and small gym, cafeteria, library, vocational classrooms, the 2nd floor atrium and the natatorium. Numerous metal halide lamps in the natatorium were not functioning during the walkthrough. Staff reported that the operation of many lamps are inconsistent in that at times they will work while at other times they will not. This could be a combination of either lamps having burn out or faulty switches or connections. Recommendations It is recommended that the metal halide fixtures in the gyms, vocational classrooms and cafeteria be replaced with more energy efficient T8 linear fluorescent lighting fixtures. Fixtures in the gymnasium would be enclosed in metal cages to prevent damage from balls and other projectiles. Metal halide Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 31 of 51 fixtures in the natatorium should be retrofitted with induction fixtures designed for use in humid swimming pool environments. Metal halide fixtures in the library or second floor atrium area should be retrofitted with either induction lighting or high wattage compact fluorescent lamps. All of these fixtures consume much less energy, offer better light rendering, and offer the ability to turn the lights on and off instantly. 4.5.1a Lighting Measures – Replace Existing Fixtures/Bulbs Rank Location Existing Condition Recommendation 32 Entry Area 3 MH 400 Watt StdElectronic Replace with 3 200W Induction Installation Cost $49,520 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $549 Breakeven Cost $10,365 Savings‐to‐Investment Ratio 0.2 Simple Payback yrs 90 Auditors Notes: $969.80 Rank Location Existing Condition Recommendation 31 Mechanical 2 FLUOR (2) T12 4' F40T12 34W Energy‐Saver Magnetic with Manual Switching Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic Installation Cost $206 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $4 Breakeven Cost $49 Savings‐to‐Investment Ratio 0.2 Simple Payback yrs 52 Auditors Notes: $103.17/Fix Rank Location Existing Condition Recommendation 30 Restrooms 4 FLUOR (2) CFL, Plug‐in 13W Quad Tube StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $500 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $10 Breakeven Cost $122 Savings‐to‐Investment Ratio 0.2 Simple Payback yrs 50 Auditors Notes: ~1 Sensors Needed $500/Sensor Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 32 of 51 Rank Location Existing Condition Recommendation 29 Storage 2 FLUOR (2) T12 4' F40T12 34W Energy‐Saver Magnetic with Manual Switching Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic Installation Cost $206 Estimated Life of Measure (yrs)14 Energy Savings (/yr) $5 Breakeven Cost $53 Savings‐to‐Investment Ratio 0.3 Simple Payback yrs 45 Auditors Notes: $103.17/fix Rank Location Existing Condition Recommendation 28 Locker Room 40 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $5,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $235 Breakeven Cost $2,862 Savings‐to‐Investment Ratio 0.6 Simple Payback yrs 21 Auditors Notes: ~10 sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 27 Small Gym 20 MH 250 Watt StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $4,973 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $246 Breakeven Cost $2,985 Savings‐to‐Investment Ratio 0.6 Simple Payback yrs 20 Auditors Notes: $534.04/fix ~$4972.68 for sensors Rank Location Existing Condition Recommendation 26 Pool Locker rooms 38 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $4,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $224 Breakeven Cost $2,719 Savings‐to‐Investment Ratio 0.7 Simple Payback yrs 18 Auditors Notes: ~8 Sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 25 Vocational Shops 53 MH 250 Watt StdElectronic with Manual Switching Replace with 53 FLUOR (4) T8 4' F32T8 32W Standard (2) Instant StdElectronic Installation Cost $28,304 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $1,724 Breakeven Cost $20,976 Savings‐to‐Investment Ratio 0.7 Simple Payback yrs 16 Auditors Notes: $534.04/fix Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 33 of 51 Rank Location Existing Condition Recommendation 24 Main Gym 40 MH 400 Watt StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $10,972 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $698 Breakeven Cost $8,491 Savings‐to‐Investment Ratio 0.8 Simple Payback yrs 16 Auditors Notes: $596.34.34/fix ~$10972.40 for sensors Rank Location Existing Condition Recommendation 23 Library 12 MH 400 Watt StdElectronic with Manual Switching Replace with 12 200W Induction Installation Cost $11,638 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $533 Breakeven Cost $10,104 Savings‐to‐Investment Ratio 0.9 Simple Payback yrs 22 Auditors Notes: $969.80/fix Rank Location Existing Condition Recommendation 22 Offices 8 FLUOR (2) T12 4' F40T12 34W Energy‐Saver Magnetic with Manual Switching Replace with 8 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic Installation Cost $825 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $60 Breakeven Cost $731 Savings‐to‐Investment Ratio 0.9 Simple Payback yrs 14 Auditors Notes: $103.17/fix Rank Location Existing Condition Recommendation 21 Weight Room 20 FLUOR (2) T12 F40T12 35W U‐Tube Energy‐Saver Magnetic with Manual Switching Replace with 20 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic Installation Cost $2,659 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $206 Breakeven Cost $2,502 Savings‐to‐Investment Ratio 0.9 Simple Payback yrs 13 Auditors Notes: $132.94/fix Rank Location Existing Condition Recommendation 20 Offices 4 FLUOR (2) T12 F40T12 35W U‐Tube Energy‐Saver Magnetic with Manual Switching Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic Installation Cost $413 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $33 Breakeven Cost $397 Savings‐to‐Investment Ratio 1.0 Simple Payback yrs 13 Auditors Notes: $103.17/fix Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 34 of 51 Rank Location Existing Condition Recommendation 19 Exterior 17 MH 150 Watt StdElectronic with Manual Switching Replace with 17 80W Induction Installation Cost $10,994 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $583 Breakeven Cost $11,221 Savings‐to‐Investment Ratio 1.0 Simple Payback yrs 19 Auditors Notes: $646.73/fix Rank Location Existing Condition Recommendation 18 Restrooms 8 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $500 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $42 Breakeven Cost $515 Savings‐to‐Investment Ratio 1.0 Simple Payback yrs 12 Auditors Notes: ~1 Sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 17 2nd Floor Atrium Hallway 11 MH 250 Watt StdElectronic with Manual Switching Replace with 11 120W Induction Installation Cost $8,105 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $577 Breakeven Cost $10,944 Savings‐to‐Investment Ratio 1.4 Simple Payback yrs 14 Auditors Notes: $736.84/fix Rank Location Existing Condition Recommendation 16 Exterior 7 MH 70 Watt StdElectronic Replace with 7 40W Induction Installation Cost $3,804 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $271 Breakeven Cost $5,208 Savings‐to‐Investment Ratio 1.4 Simple Payback yrs 14 Auditors Notes: 543.43/fix Rank Location Existing Condition Recommendation 15 Hallways 260 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $11,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $1,331 Breakeven Cost $16,201 Savings‐to‐Investment Ratio 1.5 Simple Payback yrs 8 Auditors Notes: ~12 Fixtures/Sensor ~22 Sensors Needed $500/Sensor Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 35 of 51 Rank Location Existing Condition Recommendation 14 Small Gym 20 MH 250 Watt StdElectronic with Manual Switching Replace with 20 FLUOR (4) T8 4' F32T8 32W Standard (2) Program StdElectronic Installation Cost $10,681 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $1,318 Breakeven Cost $16,033 Savings‐to‐Investment Ratio 1.5 Simple Payback yrs 8 Auditors Notes: $534.04/fix ~$4972.68 for sensors Rank Location Existing Condition Recommendation 13 Hallways 24 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $1,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $123 Breakeven Cost $1,502 Savings‐to‐Investment Ratio 1.5 Simple Payback yrs 8 Auditors Notes: ~12 Fixtures/Sensor ~4 Sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 11 Exterior 49 MH 400 Watt StdElectronic with Manual Switching Replace with 49 200W Induction Installation Cost $47,520 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $4,668 Breakeven Cost $89,807 Savings‐to‐Investment Ratio 1.9 Simple Payback yrs 10 Auditors Notes: $969.80/fix Rank Location Existing Condition Recommendation 10 Pool 42 MH 400 Watt StdElectronic with Manual Switching Replace with 42 200 W Induction Installation Cost $31,500 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $3,309 Breakeven Cost $62,833 Savings‐to‐Investment Ratio 2.0 Simple Payback yrs 10 Auditors Notes: ~$750/fixture Rank Location Existing Condition Recommendation 9 Cafeteria 15 MH 400 Watt StdElectronic with Manual Switching Replace with 15 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic Installation Cost $8,945 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $1,517 Breakeven Cost $18,483 Savings‐to‐Investment Ratio 2.1 Simple Payback yrs 6 Auditors Notes: $596.34/fix Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 36 of 51 Rank Location Existing Condition Recommendation 8 Hallways 17 FLUOR (2) T8 F32T8 32W U‐Tube Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $500 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $90 Breakeven Cost $1,094 Savings‐to‐Investment Ratio 2.2 Simple Payback yrs 6 Auditors Notes: ~1 Sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 7 Main Gym 40 MH 400 Watt StdElectronic with Manual Switching Replace with 40 FLUOR (6) T8 4' F32T8 32W Standard (2) Instant StdElectronic Installation Cost $23,854 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $4,710 Breakeven Cost $57,388 Savings‐to‐Investment Ratio 2.4 Simple Payback yrs 5 Auditors Notes: $596.34.34/fix ~$10972.40 for sensors Rank Location Existing Condition Recommendation 5 Offices 8 INCAN A Lamp, Std 60W with Manual Switching Replace with 8 FLUOR CFL, Plug‐in 18W Quad Tube StdElectronic Installation Cost $253 Estimated Life of Measure (yrs)7 Energy Savings (/yr) $100 Breakeven Cost $633 Savings‐to‐Investment Ratio 2.5 Simple Payback yrs 3 Auditors Notes: $31.67/fix Rank Location Existing Condition Recommendation 4 Exterior 20 MH 100 Watt StdElectronic Replace with 20 40W Induction Installation Cost $10,869 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $1,490 Breakeven Cost $28,659 Savings‐to‐Investment Ratio 2.6 Simple Payback yrs 7 Auditors Notes: $543.43/fix Rank Location Existing Condition Recommendation 3 Classrooms 12 INCAN A Lamp, Std 150W with Manual Switching Replace with 12 FLUOR CFL, Reflector 26W PAR38 Installation Cost $420 Estimated Life of Measure (yrs)7 Energy Savings (/yr) $294 Breakeven Cost $1,872 Savings‐to‐Investment Ratio 4.5 Simple Payback yrs 1 Auditors Notes: ~$35/fix Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 37 of 51 4.5.1b Lighting Measures – Lighting Controls 4.5.2 Refrigeration Measures While no savings was calculated it is recommended that if the School Kitchen is not in use over the summer break that a policy be instituted by the school that shuts down all refrigerators and freezers. Care must be taken to insure that the units are properly emptied prior to shutting them down and that the systems are sanitized properly prior to starting them again. This measure is a low/no cost measure that can be made part of the year end checklist. Savings come from a reduction in electrical consumption and demand by reducing the electrical load at the facility. 4.5.3 Other Electrical Measures No building shell improvements are recommended at this time. 4.5.4 Cooking Measures No building shell improvements are recommended at this time. 4.5.5 Clothes Drying Measures No building shell improvements are recommended at this time. Rank Location Existing Condition Recommendation 2 Hallways INCAN A Lamp, Std 150W with Manual Switching Replace with FLUOR CFL, Reflector 26W PAR38 Installation Cost $35 Estimated Life of Measure (yrs)7 Energy Savings (/yr) $42 Breakeven Cost $269 Savings‐to‐Investment Ratio 7.7 Simple Payback yrs 1 Auditors Notes: Rank Location Existing Condition Recommendation 34 Restrooms 7 FLUOR CFL, Reflector 23W R25 with Manual Switching Controls retrofit Installation Cost $500 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $ Breakeven Cost $ Savings‐to‐Investment Ratio 0.0 Simple Payback yrs 1000 Auditors Notes: ~1 Sensors Needed $500/Sensor Rank Location Existing Condition Recommendation 33 Restrooms 17 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Controls retrofit Installation Cost $1,500 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $ Breakeven Cost $ Savings‐to‐Investment Ratio 0.0 Simple Payback yrs 1000 Auditors Notes: ~3 Sensors Needed $500/Sensor Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 38 of 51 5. ENERGY EFFICIENCY ACTION PLAN Through inspection of the energy‐using equipment on‐site and discussions with site facilities personnel, this energy audit has identified several energy‐saving measures. The measures will reduce the amount of fuel burned and electricity used at the site. The projects will not degrade the performance of the building and, in some cases, will improve it. Several types of EEMs can be implemented immediately by building staff, and others will require various amounts of lead time for engineering and equipment acquisition. In some cases, there are logical advantages to implementing EEMs concurrently. For example, if the same electrical contractor is used to install both lighting equipment and motors, implementation of these measures should be scheduled to occur simultaneously. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 39 of 51 APPENDICES Appendix A – Major Equipment List Boilers Unit Make Model MBH in MBH out Burner B-1 Weil-McLain BG 2594 SW 8660 6060 7.5 HP @89% B-2 Weil-McLain BG 2594 SW 8660 6060 7.5 HP @89% Circulation Pumps Unit Size Notes PMP-1 5HP @ 82% PMP-1A 5HP @ 82% One runs at a time PMP-2 3HP @ 80% PMP-2A 5HP @ 82% One runs at a time PMP-3 5HP @ 82% PMP-3A 3HP @ 80% One runs at a time PMP-5 5HP @ 82% PMP-5A 5HP @ 82% One runs at a time PMP-6 1.5HP @ 78% PMP-6A 1.5HP @ 78% One runs at a time HWG-P13 5 HP @ 82% HWG-P15 5 HP @ 82% Glycol Circulation Pumps. One runs at a time. DHW Tanks Make PVI Nickelshield Model N750A-T Serial 28760572 Quantity 2 Gallons 750 Heated through heat exchanger, one tank is closed off. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 40 of 51 Fans Tag Serves CFM HP Eff VAV/ CV Supply, Return, Exhaust Notes F-1 All Zones 80,000 200 82.0 % VAV/ CV S Occ mode. most likely original, VFD was installed in 2009/2010 school year (Dec or March). Serves VAVs in all academic buildings. F-2/Hi Gym 30,640 20 87.5 % CV S Warm up mode F-2/Lo Gym 11,975 5 85.5 % CV S Occ mode F-3 25,260 25 CV S Occ Mode F-4 22,375 5 CV R/E Occ Mode F-5 Commons 11,417 5 CV S Occ Mode F-6 Building Pressure Balance 18,860 2 82.5 % VAV R/E Six small fans sequence F-7 Glass Wash 1,080 0.5 CV S Runs OA<60'F F-8 Entry A127 600 0.33 CV S Room Temp Cycles @OA<60'F F-9 Entry A126 1,700 0.5 CV S Room Temp Cycles @OA<60'F F-10 Chase in A106 855 0.25 CV E Occ Mode F-11 Band Storage 85 0.02 CV E Cycles Room Temp F-12 B155 125 0.05 CV E Cycles Room Temp F-13 B135 120 0.1 CV E Cycles Room Temp F-14 Conf B115 475 0.1 CV E Manual Timer Switch F-15 Mail B113 520 0.1 CV E Occ Mode F-16 Stor C102 160 0.02 CV E Cycles Room Temp F-17 shop test tank 2,000 0.75 CV S Manual Timer Switch F-18 shop hot tank 2,200 0.75 CV S Manual Timer Switch F-19 shop welding 7,000 3 CV S Manual Timer Switch /Gas Burner F-20 shop welding 5,000 1 CV E Manual Timer Switch F-21 shop welding 5,000 1.5 CV S Manual Timer Switch / Gas Burner F-22 Shop Welding 7,000 2 CV E Manual Timer Switch w/ F-19 F-23 Paint Rm 4,200 2 CV S Wall Timer / Gas burner Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 41 of 51 F-24 Paint Rm 4,200 1.5 CV E Wall Timer F-25 Paint Rm 158 0.05 CV E Cycles Room Temp F-26 3,350 1.5 CV R F-27 Entry C130 480 0.33 CV S OA<60'F F-28 Soffit 980 0.33 CV S F-29 Kitchen 4,320 2 CV S Cycles with Exh / Gas Burner F-30 Kitchen 5,400 5 CV E Manual Control F-31 615 0.33 CV E F-32 Weight/Wrestling 2,635 0.75 CV S F-33 electric rm 800 0.25 CV S cycle on room temp F-34 Art/Chem/BioHood 525 0.5 CV S Manual Wall Timer -3 F-35 Art/Chem/BioHood 750 0.33 CV R/E Manual Wall Timer - 03 F-36 Glass Wash 436 0.25 CV S Runs OA<60'F F-37 132 0.05 CV E Occ Mode Run Continuous F-38 Kiln 830 0.175 CV E Cycles Room Temp F-39 2,000 0.5 CV E F-40 505 0.175 CV E Occ Mode Run Continuous F-41 Glass Wash 1,270 0.75 CV S Runs OA<60'F F-42 Darkroom 174 0.02 CV E Manual Timer Switch F-43 Locker Rm 2,655 0.75 CV E Continuous Occ Mode F-44 Test Tank 1,830 0.5 CV E Manual Timer Switch w/ F-17 F-45 Hot Tank 2,205 0.5 CV E Manual Timer Switch w/ F-18 F-46 1,400 1 CV E F-47 225 0.125 CV E Occ Mode Run Continuous F-48 Weight Rm 850 0.5 CV S Wired to Room Lights F-49 Boiler Rm 4,500 2 CV S Cycles Room Temp F-50 Gym 2,755 0.75 CV S Unocc mode runs continuous F-51 electric rm a112 2,000 0.75 CV S Cycles on Temp F-52 electric rm b133 1,810 0.75 CV S Cycles on Temp Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 42 of 51 Pool Fans F-53 Storage, band 1,329 0.33 CV S 24/7 OA<60'F F-54 electric rm c129 1,069 1 CV S Cycles Room Temp F-55 A204 1,059 0.25 CV S Cycles Room Temp F-56 Chorus 794 0.175 CV S Occ Mode Run Continuous Tag Serves CFM HP VAV/ CV Supply, Return, Exhaust Notes PF-1 Pool Main 20,400 15 CV S Has heat recovery loop PF-2 Pool Main 21,400 15 CV R/E PF-3 Pool Spectator 5,000 2 CV S PF-4 Pool Spectator 5,000 1.5 CV R/E PF-5 Pool Lockers/Office 4,250 2 CV S 5 coils PF-6 Pool Lockers/Office 3,630 1 CV E PF-7 Pool Windows 5,000 3 CV S PF-8 Chlorine Rm Vent 960 0.2 5 CV E Local Chlorine Monitor Cycles Fan Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 43 of 51 Appendix B – Lighting Inventory 100W HPS 150 W MH 150W Incandescent 1x4x1 T8 1x4x2 T8 2 x 13W CFL 2 x 23W CFL 23W CFL 250 W MH 2x2x2U T12 2x2x2U T8 2x4x2 T8 2x4x3 T8 2x4x4 T8 400W MH 60 W Incandescent 70W MH 1x4x2 T12 (34W) Grand Total Classrooms 12 104 60 53 77 28 371 25 12 742 Exterior 20 17 49 7 93 Gym Area 40 9 20 20 38 40 167 Hallways 1 4 24 4 11 17 260 6 18 345 Kitchen & Cafeteria 36 36 Mechanical 40 2 42 Offices 8 20 4 4 5 83 8 8 140 Pool Area 42 42 Restrooms 17 4 7 8 36 Storage 89 13 4 4 7 2 119 Grand Total 20 17 13 116 306 17 4 36 126 24 102 343 467 25 119 8 7 12 1762 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 44 of 51 Appendix C – IR Photos Heat loss around windows and doors. Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 45 of 51 Appendix D – Utility Data First Name Last Name Middle Name Phone Kevin Lyon 907‐262‐9657 State Zip AK 99669 Monday‐ Friday Saturday Sunday Holidays 7 to 50 0 0 Average # of Occupants During 500 0 0 0 Renovations / Notes Date None Note: PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton Other energy sources? Primary Operating Hours Contact Person City Soldotna47140 East Poppy Lane Mailing Address Email klyon@borough.kenai.ak.us Details 46188 Sterling Hwy Soldotna 99669 Drawings are maintained at district maintenance office in Soldotna. 1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for the energy source. 2. Provide utilities bills for the most recent two‐year period for each energy source you use. Facility Owned By Date 03/13/11Municipal Facility Zip 4,000 1988 REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner KPBSD Building Name/ Identifier Building Usage Building Square Footage Facility Address Building Type School Community Population Facility City Skyview High Education 90,300 Year Built Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 46 of 51 Skyview High Buiding Size Input (sf) =90,300 2009 Natural Gas Consumption (Therms)93,480 2009 Natural Gas Cost ($)80,169 2009 Electric Consumption (kWh)1,621,280 2009 Electric Cost ($)274,324 2009 Oil Consumption (Therms) 2009 Oil Cost ($) 2009 Propane Consumption (Therms) 2009 Propane Cost ($) 2009 Coal Consumption (Therms) 2009 Coal Cost ($) 2009 Wood Consumption (Therms) 2009 Wood Cost ($) 2009 Thermal Consumption (Therms) 2009 Thermal Cost ($) 2009 Steam Consumption (Therms) 2009 Steam Cost ($) 2009 Total Energy Use (kBtu)14,881,429 2009 Total Energy Cost ($)354,493 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 103.5 2009 Electricity (kBtu/sf)61.3 2009 Oil (kBtu/sf) 2009 Propane (kBtu/sf) 2009 Coal (kBtu/sf) 2009 Wood (kBtu/sf) 2009 Thermal (kBtu/sf) 2009 Steam (kBtu/sf) 2009 Energy Utilization Index (kBtu/sf)164.8 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf)0.89 2009 Electric Cost Index ($/sf)3.04 2009 Oil Cost Index ($/sf) 2009 Propane Cost Index ($/sf) 2009 Coal Cost Index ($/sf) 2009 Wood Cost Index ($/sf) 2009 Thermal Cost Index ($/sf) 2009 Steam Cost Index ($/sf) 2009 Energy Cost Index ($/sf)3.93 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 47 of 51 2010 Natural Gas Consumption (Therms)100,492 2010 Natural Gas Cost ($)92,611 2010 Electric Consumption (kWh)1,560,000 2010 Electric Cost ($)222,759 2010 Oil Consumption (Therms) 2010 Oil Cost ($) 2010 Propane Consumption (Therms) 2010 Propane Cost ($) 2010 Coal Consumption (Therms) 2010 Coal Cost ($) 2010 Wood Consumption (Therms) 2010 Wood Cost ($) 2010 Thermal Consumption (Therms) 2010 Thermal Cost ($) 2010 Steam Consumption (Therms) 2010 Steam Cost ($) 2010 Total Energy Use (kBtu)15,373,480 2010 Total Energy Cost ($)315,370 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf)111.3 2010 Electricity (kBtu/sf)59.0 2010 Oil (kBtu/sf) 2010 Propane (kBtu/sf) 2010 Coal (kBtu/sf) 2010 Wood (kBtu/sf) 2010 Thermal (kBtu/sf) 2010 Steam (kBtu/sf) 2010 Energy Utilization Index (kBtu/sf)170.2 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf)1.03 2010 Electric Cost Index ($/sf)2.47 2010 Oil Cost Index ($/sf) 2010 Propane Cost Index ($/sf) 2010 Coal Cost Index ($/sf) 2010 Wood Cost Index ($/sf) 2010 Thermal Cost Index ($/sf) 2010 Steam Cost Index ($/sf) 20010 Energy Cost Index ($/sf)3.49 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 48 of 51 Skyview HighNatural 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 ($)ENSTAR159402 Jul‐08 7/1/2008 7/31/2008 30 4,520 4,520 $3,363 $0.74ENSTAR159402 Aug‐08 8/1/2008 8/31/2008 30 3,320 3,320 $2,485 $0.75ENSTAR159402 Sep‐08 9/1/2008 9/30/2008 29 6,130 6,130 $4,540 $0.74ENSTAR159402 Oct‐08 10/1/2008 10/31/2008 30 7,590 7,590 $5,607 $0.74ENSTAR159402 Nov‐08 11/1/2008 11/30/2008 29 9,140 9,140 $6,740 $0.74ENSTAR159402 Dec‐08 12/1/2008 12/31/2008 30 9,100 9,100 $6,711 $0.74ENSTAR159402 Jan‐09 1/1/2009 1/31/2009 30 12,070 12,070 $10,919 $0.90ENSTAR159402 Feb‐09 2/1/2009 2/28/2009 27 10,280 10,280 $9,309 $0.91ENSTAR159402 Mar‐09 3/1/2009 3/31/2009 30 11,280 11,280 $10,208 $0.90ENSTAR159402 Apr‐09 4/1/2009 4/27/2009 26 7,140 7,140 $7,220 $1.01ENSTAR159402 May‐09 4/28/2009 5/25/2009 27 7,580 7,580 $7,661 $1.01ENSTAR159402 Jun‐09 5/26/2009 6/24/2009 28 5,330 5,330 $5,406 $1.01ENSTAR159402 Jul‐09 6/25/2009 7/27/2009 33 6,037 6,037 $6,133 $1.02ENSTAR159402 Aug‐09 7/28/2009 8/25/2009 29 7,861 7,861 $7,963 $1.01ENSTAR159402 Sep‐09 8/26/2009 9/24/2009 30 6,108 6,108 $6,204 $1.02ENSTAR159402 Oct‐09 9/25/2009 10/25/2009 31 7,375 7,375 $7,476 $1.01ENSTAR159402 Nov‐09 10/26/2009 11/22/2009 28 10,343 10,343 $10,452 $1.01ENSTAR159402 Dec‐09 11/23/2009 12/22/2009 30 9,904 9,904 $9,997 $1.01ENSTAR159402 Jan‐10 12/23/2009 1/24/2010 33 12,051 12,051 $10,051 $0.83ENSTAR159402 Feb‐10 1/25/2010 2/21/2010 28 9,399 9,399 $7,856 $0.84ENSTAR159402 Mar‐10 2/22/2010 3/25/2010 32 9,933 9,933 $8,299 $0.84ENSTAR159402 Apr‐10 3/26/2010 4/25/2010 31 9,263 9,263 $7,816 $0.84ENSTAR159402 May‐10 4/26/2010 5/24/2010 29 6,548 6,548 $5,549 $0.85ENSTAR159402 Jun‐10 5/25/2010 6/24/2010 30 5,670 5,670 $4,815 $0.85Jul ‐ 08 to Jun ‐ 09 total:93,480 93,480 0$80,169 $0Jul ‐ 09 to Jun ‐ 10 total:100,492 100,492 0$92,611 $0Jul ‐ 08 to Jun ‐ 09 avg:$0.85Jul ‐ 09 to Jun ‐ 10 avg:$0.93 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 49 of 51 Skyview High ‐ Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)02,0004,0006,0008,00010,00012,00014,000Jul‐08Aug‐08Sep‐08Oct‐08Nov‐08Dec‐08Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Date (Mon ‐ Yr)Natural Gas Consumption (Therms)$0$2,000$4,000$6,000$8,000$10,000$12,000Natural Gas Cost ($)Natural Gas Consumption(Therms)Natural Gas Cost ($) Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 50 of 51 Skyview HighElectricityBtus/kWh =3,413Provider Customer #Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)Homer Electric 285093 Jul‐08 7/16/2008 8/17/2008 33 106,640 3,640 278 $14,255 $0.13Homer Electric 285093 Aug‐08 8/18/2008 9/18/2008 31 144,960 4,947 379 $19,388 $0.13Homer Electric 285093 Sep‐08 9/18/2008 10/15/2008 28 140,000 4,778 394 $22,950 $0.16Homer Electric 285093 Oct‐08 10/16/2008 11/16/2008 32 153,680 5,245 382 $24,822 $0.16Homer Electric 285093 Nov‐08 11/17/2008 12/16/2008 30 147,520 5,035 384 $23,953 $0.16Homer Electric 285093 Dec‐08 12/17/2008 1/15/2009 30 151,680 5,177 375 $30,426 $0.20Homer Electric 285093 Jan‐09 1/16/2009 2/16/2009 32 165,040 5,633 382 $32,913 $0.20Homer Electric 285093 Feb‐09 2/17/2009 3/17/2009 29 135,520 4,625 370 $27,435 $0.20Homer Electric 285093 Mar‐09 3/18/2009 4/14/2009 28 120,400 4,109 361 $19,852 $0.16Homer Electric 285093 Apr‐09 4/15/2009 5/17/2009 33 150,080 5,122 368 $24,156 $0.16Homer Electric 285093 May‐09 5/18/2009 6/14/2009 28 94,560 3,227 327 $15,902 $0.17Homer Electric 285093 Jun‐09 6/15/2009 7/16/2009 32 111,200 3,795 286 $18,272 $0.16Homer Electric 285093 Jul‐09 7/17/2009 8/17/2009 32 148,240 5,059 284 $23,679 $0.16Homer Electric 285093 Aug‐09 8/18/2009 9/16/2009 30 150,720 5,144 377 $24,696 $0.16Homer Electric 285093 Sep‐09 9/17/2009 10/18/2009 32 144,160 4,920 373 $20,459 $0.14Homer Electric 285093 Oct‐09 10/19/2009 11/15/2009 28 130,160 4,442 374 $18,712 $0.14Homer Electric 285093 Nov‐09 11/16/2009 12/15/2009 30 140,880 4,808 564 $20,010 $0.14Homer Electric 285093 Dec‐09 12/16/2009 1/20/2010 36 148,640 5,073 532 $18,147 $0.12Homer Electric 285093 Jan‐10 1/21/2010 2/16/2010 27 125,840 4,295 463 $15,673 $0.12Homer Electric 285093 Feb‐10 2/17/2010 3/14/2010 26 121,440 4,145 486 $15,311 $0.13Homer Electric 285093 Mar‐10 3/15/2010 4/13/2010 30 123,040 4,199 321 $17,982 $0.15Homer Electric 285093 Apr‐10 4/14/2010 5/13/2010 30 130,640 4,459 344 $19,094 $0.15Homer Electric 285093 May‐10 5/14/2010 6/15/2010 33 108,720 3,711 332 $16,250 $0.15Homer Electric 285093 Jun‐10 6/16/2010 7/19/2010 33 87,520 2,987 206 $12,746 $0.15Jul ‐ 08 to Jun ‐ 09 total:1,621,280 55,334 4,285 $274,324 $0Jul ‐ 09 to Jun ‐ 10 total:1,560,000 53,243 4,656 $222,759 $0Jul ‐ 08 to Jun ‐ 09 avg:$0.17Jul ‐ 09 to Jun ‐ 10 avg:$0.14 Siemens Industry, Inc. Skyview High School Energy Audit Report AkWarm ID No. CIRI‐SXQ‐CAEC‐10 Page 51 of 51 Skyview High ‐ Electric Consumption (kWh) vs. Electric Cost ($)020,00040,00060,00080,000100,000120,000140,000160,000180,000Jul‐08Aug‐08Sep‐08Oct‐08Nov‐08Dec‐08Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Date (Mon ‐ Yr)Electric Consumption (kWh)$0$5,000$10,000$15,000$20,000$25,000$30,000$35,000Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)