FINAL ENERGY AUDIT. Nikolaevsk School Nikolaevsk Road. Nikolaevsk, AK ATTN: Kevin Lyon

Transcription

1 FINAL ENERGY AUDIT Nikolaevsk School Nikolaevsk Road Nikolaevsk, AK ATTN: Kevin Lyon Submitted by: Wisdom and Associates, Inc. Contact: Robert Moss, CEA 130 Trading Bay, #320 Kenai, AK Phone (907) Prime Contract: Contact: Jerry P. Herring, P.E., C.E.A Lakefront Drive Soldotna, Alaska Phone (907)

2 Table of Contents Introduction 4 Executive Summary 6 Methods of Analysis 8 Audit/Building Overview 9 Energy Conservation Measures 10 Operations and Maintenance 24 Benchmark Information 25 Supporting Documentation 32 Equipment Inventory Benchmark Data ECM Calculations Data pg. 2

3 REPORT DISCLAIMER This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings and approximate the costs to implement the recommendations. 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 recommendations should all be first analyzed through a thorough lighting analysis to assure that the recommended lighting upgrades will comply with State of Alaska Statue and well as Illuminating Engineering Society (IES) recommendations. Wisdom and Associates, Inc. and Central Alaska Engineering Company bear no responsibility for work performed as a result of this report. Payback periods may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, and installation costs of recommended Energy Conservation Measures (ECMs), or the operating schedules and maintenance provided by the owner. Furthermore, ECMs are typically interactive, so implementation of one ECM may impact the cost savings from another ECM. Wisdom and Associates, Inc. and Central Alaska Engineering Company accept no liability for financial loss due to ECMs that fail to meet the forecasted payback periods. 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. IGA s 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-EE 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. pg. 3

4 Introduction This report is a comprehensive energy study, which included an analysis of major energy consuming components of the building. The scope of the audit focused on the Nikolaevsk School as part of a contract for: Alaska Housing Finance Corporation Kenai Peninsula Borough Contact: Rebekah Luhrs Contact: Kevin Lyon 4300 Boniface Parkway 144 N. Binkley Street Anchorage, AK Soldotna, AK rluhrs@ahfc.us klyon@borough.kenai.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. Opportunities for application of these energy saving methods are discussed in detail throughout this report. The average annual energy costs at this facility are as follows: Electricity $32, Oil $34, Total $66, pg. 4

5 The potential annual energy cost savings for each energy conservation measure are summarized in the executive summary along with a more detailed description in the energy conservation measures section. All calculations are available in the support documentation. This audit is consistent with an ASHRAE Level 2 audit. The evaluations are based on estimations and industry standard calculation methods. The cost of each measure for this level of auditing is + 30% until detailed engineering, specifications, and hard proposals are obtained. More detailed analyses would require engineering simulation models, hard equipment specifications, and contractor bid pricing. The comprehensive energy audit covers the 23,905 square foot school. Utility information was collected and analyzed for 2 full year s energy use of the building. The utility information allows us to analyze the building s operational characteristics and calculate energy benchmarks for comparison to industry averages. A computer spreadsheet was used to calculate benchmarks and to graph utility information (see the Benchmarking section). An Energy Use Index (EUI) was established for the building. Energy Use Index (EUI) is expressed in British Thermal Units/square foot/year (BTU/ft2/yr), which is used to compare energy consumption to similar building types or to track consumption from year to year in the same building. The EUI is calculated by converting the annual consumption of all energy sources to BTU s and dividing by the area (gross square footage) of the building. Blueprints and drawings are utilized to verify the gross area of the facility. The EUI can be a good indicator of the relative potential for energy savings. A low EUI indicates less potential for energy savings, while a high EUI indicates poor building performance, therefore, a high potential for energy savings. The site survey provided information for interpreting where energy was spent and finding energy savings opportunities within the facility. The building site visit was performed to survey all major building components and systems. The site visit included an inspection of energy consuming components. pg. 5

6 Executive Summary The executive summary provides a snapshot of estimated improvement costs, Net Present Value savings, breakeven costs and savings to investment ratios. ECM # Improvement Description Energy Conservation Measures Recommendation Table Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) 1 Replace exisiting exterior incandescent lamps with 18w compact fluorescent lamps rated $98 $319 $5,107 $5, % for cold weather. 2 Replace existing interior incandescent lamps with 18w compact fluorescent lamps. $235 $150 $2,394 $2, % 3 Replace 4' 4 lamp T12 gym security lights with 4' 4 lamp T8 fixtures and 25w lamps. $1,747 $539 $8,622 $10, % 4 Replace existing lamps in T8 fixtures with 25w lamps. $19,327 $1,330 $21,272 $40, % 5 Replace current Grundfos UP circulation pumps in original utility room with equivalent permanent magnet, variable speed $7,060 $448 $6,713 $13, % pump. 6 Replace 5hp air handler motor in original utility room with minimum 89.5% efficient $2,744 $153 $2,288 $5, % motor. 7 Add additional R-16 insulation to old portion of school cathedral ceiling. This improvement does not include the cost of re-roofing. This measure should only be done at the time of a $27,216 $960 $19,191 $46, % planned change in roof materials in order to be cost effective. 8 Replace 5hp air handler motor in classroom addition utility room with minimum 89.5% $2,744 $20 $303 $3, % efficient motor. Total, Effective Measures $61,169 $3,917 $65,890 $127, % 9 Replace 3hp air handler motor in classroom addition utility room with minimum 89.5% $1,977 ($10) ($149) $1, % efficient motor. 10 Replace existing metal halide lights with T5 Hi Bay lights with 54w lamps and electronic $19,489 ($131) ($2,093) $17, % ballasts. 11 Replace existing boilers with 95% AFUE boilers. This ECM is based on savings over the existing boilers already being re-fit to $101,799 ($930) ($18,603) $83, % burn natural gas. 12 Add 6" blown fiberglass to accessible attic. $35,266 ($1,118) ($22,365) $12, >30-63% 13 Add 2 inches insulation to exterior of foundation wall around entire building. $30,448 ($1,383) ($27,667) $2, >30-91% Total, All Measures $250,148 $344 ($4,987) $245, % ROI pg. 6

7 The ECM# is the priority ranking of an Energy Conservation Measure. The Installed is the full upfront cost expected for the improvement. The Annualized NPV Savings reflects the annualized Net Present Value savings over the life of the improvement, adjusted for general inflation, fuel price escalation, maintenance, discount rate and installed cost. The NPV Savings Over Improvement Life reflects the Net Present Value of cumulative savings over the life of the improvement, adjusted for general inflation, fuel price escalation, maintenance, discount rate and installed cost. The Breakeven is the maximum cost in today s dollars that could be spent on an improvement and still be cost effective. The 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 0 indicates a cost-effective project (i.e. more savings than cost). The Return on Investment (ROI) listed for each ECM is the net savings of the energy conservation measure divided by the installed cost listed. The Simple Payback listed for each ECM is the number of years required to break even on the investment, adjusted for general inflation, fuel price escalation, maintenance, discount rate and installed cost. The total savings listed for cost effective measures and all measures are for estimation purposes only and cannot be considered 100% accurate because of the interrelation of the ECMs. pg. 7

8 Method of Analysis Post site visit work included an evaluation of the information gathered, researching possible conservation opportunities, organizing the audit into a comprehensive report, and making recommendations on HVAC, lighting, and building envelope improvements. Collected data was processed using Microsoft Excel spreadsheets and ASHRAE energy calculations to anticipate energy usage for each of the proposed energy conservation measures (ECMs). The actual building energy usage was entered directly from the utility bills provided. The anticipated energy usage was compared to the historical data to determine energy savings for the proposed ECMs. It is important to note that the savings represented in this report should not be considered additive because of the interrelation of energy conservation measures. Implementation of more than one ECM often affects the savings of other ECMs. ECMs were determined by identifying the building s unique properties and finding the most beneficial energy saving measures available that met the specific needs of the facility. The building construction type, function, operational schedule, existing conditions, and foreseen future plans were accounted for in the evaluation and final recommendations. Energy savings are calculated based on industry standard methods and estimations. Energy consumption is calculated based on manufacturer s information when new equipment is proposed. savings are calculated based on the actual historical energy costs for the facility. Installation costs include materials and labor costs to estimate the full up-front investment required. Measures were analyzed based on life-cycle-cost techniques, which include the initial cost of the improvement, expected life of the improvement, annual energy cost, annual maintenance cost, and a discount rate of 3.0%/year. Energy cost escalation rates are taken from the current Energy Price Indices and Discount Factors for Life-Cycle Analysis from the US Department of Commerce. Maintenance costs are estimated at 2% of fuel cost related to an improvement unless otherwise noted. Expected life of improvements is taken from industry and government sources. 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). 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. pg. 8

9 Audit Overview/Building Description The Nikolaevsk school was originally constructed 1975, with additional classrooms added in 1985 and a gymnasium/locker room expansion thereafter. At the time of the audit the school was being heated by to oil fired boilers that will be converted to natural gas within the next year. Therefore all heating and shell improvements are based on burning natural gas rather than oil, which because of it s much lower cost-per-therm creates longer paybacks than if oil was used as the comparison fuel. The building is served by three different air handlers, one for the original section, one for the classroom additions and one for the gymnasium. Domestic hot water is provided by the boilers as well. Interior lighting is mostly T8 fluorescent with some incandescent and CFL. Exterior lighting is mostly high pressure sodium with some incandescent. pg. 9

10 Energy Conservation Measures Energy conservation measures are those measures which are considered as having the potential to be cost effective and appropriate energy improvement options for the building. Estimated costs are taken from the current Craftsman National Estimator and are adjusted for zip code. Different rates and averages can be applied to this report if requested. Lighting and electrical improvements are based on usage estimates apparent at the time of the audit and may not reflect actual usage or occupant behavior. Before committing to a complete lighting retrofit, it is recommended that a small sample of the new lamps you intend to use be installed and tested for a time before pursuing all of the recommended changes. Light output, color rendition, color temperature and personal preference all play a part in a satisfactory lighting retrofit. The benefit of reduced energy consumption is lost if fixtures have to be re-lamped after the retrofit or people are not comfortable with a new lighting scheme. pg. 10

11 ECM # 1 Improvement Description Replace exisiting exterior incandescent lamps with 18w compact fluorescent lamps rated for cold weather. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $98 $319 $5,107 $5, % This ECM assumes a life expectancy of 16 years for this measure. Special cold weather lamps will be required for outdoor use. pg. 11

12 ECM # 2 Improvement Description Replace existing interior incandescent lamps with 18w compact fluorescent lamps. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $235 $150 $2,394 $2, % This ECM assumes a life expectancy of 16 years for this measure. pg. 12

13 ECM # 3 Improvement Description Replace 4' 4 lamp T12 gym security lights with 4' 4 lamp T8 fixtures and 25w lamps. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $1,747 $539 $8,622 $10, % This ECM assumes a life expectancy of 16 years for this measure. pg. 13

14 ECM # 4 Improvement Description Replace existing lamps in T8 fixtures with 25w lamps. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $19,327 $1,330 $21,272 $40, % This ECM assumes a life expectancy of 16 years for this measure. pg. 14

15 ECM # 5 Improvement Description Replace current Grundfos UP circulation pumps in original utility room with equivalent permanent magnet, variable speed pump. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $7,060 $448 $6,713 $13, % This ECM assumes a life expectancy of 15 years for this measure. pg. 15

16 ECM # 6 Improvement Description Replace 5hp air handler motor in original utility room with minimum 89.5% efficient motor. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $2,744 $153 $2,288 $5, % This ECM assumes a life expectancy of 15 years for this measure. pg. 16

17 ECM # 7 Improvement Description Add additional R-16 insulation to old portion of school cathedral ceiling. This improvement does not include the cost of re-roofing. This measure should only be done at the time of a planned change in roof materials in order to be cost effective. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $27,216 $960 $19,191 $46, % This ECM assumes a life expectancy of 20 years for this measure. pg. 17

18 ECM # 8 Improvement Description Replace 5hp air handler motor in classroom addition utility room with minimum 89.5% efficient motor. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $2,744 $20 $303 $3, % This ECM assumes a life expectancy of 15 years for this measure. pg. 18

19 ECM # 9 Improvement Description Replace 3hp air handler motor in classroom addition utility room with minimum 89.5% efficient motor. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $1,977 ($10) ($149) $1, % This ECM assumes a life expectancy of 15 years for this measure. pg. 19

20 ECM # 10 Improvement Description Replace existing metal haside lights with T5 Hi Bay lights with 54w lamps and electronic ballasts. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $19,489 ($131) ($2,093) $17, % This ECM assumes a life expectancy of 16 years for this measure. It is recommended that fixtures capable of multi-level switching be installed which would provide more uniform light coverage over the ice at lower wattage levels. A typical 6 lamp T5 replacement fixture could be controlled to provide 2, 4, or 6 lamps on at a time depending on need. This will increase energy savings significantly over this estimate. pg. 20

21 ECM # 11 Improvement Description Replace existing boilers with 95% AFUE boilers. This ECM is based on savings over the existing boilers already being re-fit to burn natural gas. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $101,799 ($930) ($18,603) $83, % This ECM assumes a life expectancy of 20 years for this measure. This measure is based on existing boiler already being refit with natural gas burners. The breakeven cost of $83,196, which is the savings over the life of the proposed improvement, would be much greater if compared to the original oil burners. This ECM is also based on a gas rate of $1.03 per therm, which may be more or less than actually charged once the new burners are online. Once the new gas rate is known this ECM can be re-figured to determine savings. pg. 21

22 ECM # Improvement Description Installed Annualized NPV Savings NPV Savings Over Improvement Life This ECM assumes a life expectancy of 20 years for this measure. Breakeven SIR Simple Payback (Years) 12 Add 6" blown fiberglass to accessible attic. $35,266 ($1,118) ($22,365) $12, >30-63% ROI pg. 22

23 ECM # 13 Improvement Description Add 2 inches insulation to exterior of foundation wall around entire building. Installed Annualized NPV Savings NPV Savings Over Improvement Life Breakeven SIR Simple Payback (Years) ROI $30,448 ($1,383) ($27,667) $2, >30-91% This ECM assumes a life expectancy of 20 years for this measure. pg. 23

24 Operations and Maintenance Measures Staff Training Visit for free training materials and courses on energy conservation and awareness for building staff. Live web conferences, animated presentations and pre-recorded trainings are just some of the tools available. Creating an inclusive strategy that establishes roles and actions throughout the organization can help to integrate good energy management practices. When developing an action plan, consider brainstorming with various departments to identify ways they can contribute. Portfolio Manager Consider utilizing EPA s Portfolio Manager, which is an online system that allows building personnel to track building performance and improve energy efficiency across multiple buildings. You can also contact your energy auditor for additional information about this program. See After Hours The building manager/operator should be tasked with turning off all non-essential equipment at night, on weekends, or during other non-occupied times. Power strips can be turned off during off hours; also power strips can be connected to timers or occupancy sensors. Smart power strips with built-in occupancy sensors or activity sensors are available. Plug Loads Plug loads use up to an estimated 20% of electrical energy in commercial buildings. Most plugged in devices consume energy even when off. Power is drawn by devices in passive standby, such as a computer in sleep mode or a clock on a microwave, and active standby such as when a screen saver is on a computer screen or television screen. The majority of plug loads come from office equipment (computers, printers, copiers, etc.) and appliances (refrigerators, coffee machines, etc.). As equipment deteriorates or is scheduled for replacement, it is recommended that it be replaced with EnergyStar certified equipment. Refrigeration Most refrigerators, freezers, ice makers and other types of cooling equipment can benefit from cleaning the evaporator coils. This should be done on a yearly basis to reduce electrical costs. Air Handlers Filters and coils should be cleaned/replaced periodically to ensure proper airflow. Dirty filter/coils decrease heat transfer ability and efficiency of the system. Belts should be checked regularly and tightened when necessary. Controls The building operational systems are currently controlled by a digital direct controls system. Controls on a building of this type can be one of the largest savers or wasters of energy, depending on how the controls are setup and maintained. Annual calibration, maintenance and updates are essential to a properly performing system that saves money. pg. 24

25 Benchmark Information Benchmarking and analysis of the utility bills was used to collect data about the building in terms of energy usage patterns, consumption, and comparison with similar buildings. Benchmarking was used to identify energy usage patterns and trends that showed a need for specific investigation of certain systems. Benchmarking also identified potential issues in how the building is operated which may lead to energy savings. Analysis of utility data provides a context for the audit. The BTU usage of the building per square foot is 50% more the national average of similar buildings. Part of this is due to the harsh climate in Alaska, which emphasizes the need for improvements in the heating system. Replacement of the burners on the existing boiler system to natural gas won t decrease the BTUs needed to heat the building, but will decrease the cost. pg. 25

26 Electrical usage in terms of BTU per square foot is slightly higher than the national average. The high cost per KWH of electricity makes pursuing reductions in electrical usage worthwhile. pg. 26

27 The total energy use profile shows the majority of BTUs consumed by the building are from oil which is used exclusively for heating. Electrical usage is second. pg. 27

28 The energy cost total shows a nearly even split in cost between oil and electrical. Once natural gas comes on line the fossil fuel cost will be considerably smaller than the electrical cost by proportion. pg. 28

29 Oil consumption tracks closely with Heating Degree Days, which are a measure of the heating load imposed by the climate. Oil usage is uneven due to the fact that oil deliveries did not occur every month. pg. 29

30 Electrical consumption has increased slightly over the last 2 year period. Electrical consumption also tracks with heating degree days. This is because winter is the time when the school is most heavily in use. pg. 30

31 The Load Factor is the ratio of the average load in kilowatts supplied during a designated period to the peak or maximum load in kilowatts occurring in that period (usually a month). The Load Factor takes into account spikes in demand which in turn may cause rate hikes depending on the rate structure of a particular utility. The lower the load factor, the greater the spikes in demand and the resulting penalties in demand charges. The average load factor for this building is 0.38, which is not particularly good. The percent of the electrical bill caused by demand charges is 16.5%. The amount of electrical demand from this building is slightly elevated. Reduction in demand will occur with improved electrical efficiency. pg. 31

32 Supporting Documentation This section contains all of the supporting documentation for the audit, which may include all calculations, assumptions, and worksheets used to generate conclusions. Equipment Inventory Designation Location Function Make Model Type Capacity Efficiency Motor Size Boiler 1 Utility Room Heating Weil McLain Boiler 2 Utility Room Heating Weil McLain Addition AHU Utility Room Air Handling General Electric BL 686 SW BL 686 SW 5KC184A B210A HWB HWB 1428 MMBTU/ h 1429 MMBTU/ Notes Median Est. Remaining Service Life Useful Life 80% In series % In series % Addition AHU Utility Room Air Handling General Electric N/A N/A Gymnasium Gym Utility K01G067 Air Handling Trane AHU Room 50C 5 Serve Gym 15 0 CUH 1 Gym Heat Distribution Modine CR-06 Fan Coil 620 CFM N/A From Plans 15 0 UH 1 Gym Locker Heat Distribution Modine HS-18 Fan Coil 340 CFM N/A From Plans 15 0 UH 2 Gym Heat Distribution Modine V-139 Fan Coil 2660 CFM N/A From Plans 15 0 Original AHU Utility Room Air Handling Teco BECSFD 78.50% EF1 Classrooms Exhaust Penn BB CFM From Plans 15 0 EF1 - Gym Gym Exhaust Greenheck BDF CFM From Plans 15 0 pg. 32

33 Benchmark Data Energy Use Index Form 1 Building Designation: Nikolaevsk School Electric Meter # Square footage of conditioned area: Gas Meter # Number of billing periods 24 Year: Month Days in Billing Period Electric KWH Electric Demand KW Electricity Electric $/KWH Electric Demand Electric MMBtu Load Factor % of bill from demand Jul , $0.17 $ $ % Aug , $0.14 $2, $ % Sep , $0.17 $3, $ % Oct , $0.17 $3, $ % Nov , $0.17 $3, $ % Dec , $0.21 $3, $ % Jan , $0.21 $4, $ % Feb , $0.21 $3, $ % Mar , $0.17 $2, $ % Apr , $0.18 $2, $ % May , $0.17 $2, $ % Jun , $0.17 $1, $ % Jul , $0.19 $1, $ % Aug , $0.18 $2, $ % Sep , $0.15 $2, $ % Oct , $0.15 $2, $ % Nov , $0.15 $3, $ % Dec , $0.13 $2, $ % Jan , $0.13 $2, $ % Feb , $0.13 $2, $ % Mar , $0.15 $3, $ % Apr , $0.15 $2, $ % May , $0.16 $2, $ % Jun , $0.16 $1, $ % #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! #DIV/0! 0.00 #DIV/0! #DIV/0! Montly Average #DIV/0! $2, $ #DIV/0! #DIV/0! Total ,120 N/A N/A $64, $10, , N/A N/A Monthly Benchmark Occupancy Education % Difference Size 10,001 to 100,000 Square Feet 90.38% pg. 33

34 EUI HDD CCD Production Btu/Sq. Ft $/Sq Ft 848 $ ,796 $0.10 2,544 $ ,984 $ ,606 $ ,459 $ ,163 $ ,636 $ ,945 $ ,844 $ ,984 $ ,745 $ $ ,988 $ ,510 $ ,295 $ ,307 $ ,929 $ ,299 $ ,309 $ ,777 $ ,776 $ ,452 $ ,388 $ $ $ $ $ $ $ $ $ $ $ $ $ ,441 $ ,576 $2.70 6, % Oil Usage Gallons Oil Usage Gallons Oil Oil per Gallon Oil MMBtu 0.00 $0.00 #DIV/0! , $6, $ $0.00 #DIV/0! , $3, $ , $3, $ $0.00 #DIV/0! , $8, $ , $4, $ , $3, $ , $2, $ , $2, $ , $2, $ $0.00 #DIV/0! $1, $ $0.00 #DIV/0! , $2, $ $0.00 #DIV/0! , $5, $ , $5, $ , $4, $ , $6, $ $0.00 #DIV/0! , $5, $ $0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! 0.00 #DIV/0! $2, #DIV/0! $68, #DIV/0! % pg. 34

35 Climate & Fuel Assumptions Client Information Client Name: Nikolaevsk School Address: Square Footage Days Occupied per Year State City HDD CDD Avg. Temp 365 Alaska Homer 8 NW 10, Fuels Natural Gas $1.04 $ Per CCF $1.01 Per Therm Oil $2.36 $ Per Gallon $1.69 Per Therm Electricity $0.16 $ per KWH $4.81 Per Therm Propane $ per Gallon $0.00 Per Therm Wood $ Per Cord $0.00 Per Therm Coal $ Per Ton $0.00 Per Therm Electrical Demand Charge $7.52 Kw/Month pg. 35

36 Discount, Fuel Escalation, and Inflation Assumptions 1 = Yes Real Discount Rate (i) % 0 = No Electricity % IOU Electricity Source* 1 (Investor Owned Utility) % POU Electricity Source** % Natural Gas Fuel? 1 Natural Gas % Propane Fuel? 0 And other fossil fuels % Oil Fuel? % Maintenance % Inflation % * IOU = Invester Owned Utility ** POU = Publicly Owned Utility F U E L P R I C E E S C A L A T I O N I N F O R M A T I O N: Select value and key in above as decimal fraction. Years: Electricity % (Investor-Owned) % % Electricity % (Public Owned) % % Natural Gas % % % Oil % % % Propane Assume same as natural gas pg. 36

37 ECM #1 Calculations Space Description Number of Fixtures 5 5 Lamps per Fixture 1 1 Lamp Type Incandescent CFL Fixture Wattage Hours on per Week of New Lamp $19.58 of New Fixture Total KWH $ $ Total Demand $27.07 $8.12 Total Yearly $ $ Yearly Savings $ Total Retrofit $97.90 Payback Period Retrofit Description Exterior Incandescents 0.3 years Replace exsiting exterior incandescent lamps with 18w compact fluorescent lamps rated for cold weather. pg. 37

38 A N N U A L R E A L C A S H F L O W S C U R R E N T A N N U A L R E A L C A S H F L O W S P R O P O S E D (Begin) First & Annual Annual Annual Total Present Present Present (Begin) First & Annual Annual Annual Total Present Present Present resent Value o Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Cumulative s s s s s Factor Annual Cumulative s s s s s Factor Annual Cumulative Savings 2,012 $9 $ - $457 $466 (1+i)^-n s s 2,012 $98 $3 $ - $137 $140 (1+i)^-n s s 2,012 $ $ $0 $ - 2,012 $ $ $98 $98 2, $ , $237 $ 227 2, $ 2, $376 $ 552 2, ,390 $ 2, $515 $ 875 2, ,851 $ 2, $653 $ 1,198 2, ,312 $ 2, $791 $ 1,520 2, ,774 $ 2, $930 $ 1,844 2, ,236 $ 2, $1,069 $ 2,167 2, ,698 $ 2, $1,207 $ 2,491 2, ,161 $ 2, $1,346 $ 2,815 2, ,624 $ 2, $1,485 $ 3,139 2, ,088 $ 2, $1,624 $ 3,464 2, ,552 $ 2, $1,764 $ 3,789 2, ,017 $ 2, $1,903 $ 4,114 2, ,482 $ 2, $2,043 $ 4,440 2, ,955 $ 2, $2,184 $ 4,771 2, ,435 $ 2, $2,328 $ 5,107 2, ,923 $ 2, $2,475 $ 5,448 2, ,419 $ 2, $2,624 $ 5,796 2, ,923 $ 2, $2,775 $ 6,148 2, ,435 $ 2, $2,929 $ 6,507 2, ,956 $ 2, $3,085 $ 6,871 2, , ,485 $ 2, $3,243 $ 7,241 2, ,043 1, ,022 $ 2, $3,405 $ 7,618 2, ,092 1, ,569 $ 2, $3,568 $ 8,000 2, ,143 1, ,124 $ 2, $3,735 $ 8,389 2, ,197 1, ,688 $ 2, $3,904 $ 8,784 2, ,253 1, ,261 $ 2, $4,076 $ 9,185 2, ,312 1, ,844 $ 2, $4,251 $ 9,593 2, ,374 1, ,436 $ 2, $4,429 $ 10,007 2, ,438 1, $ 15,037 2, $4,609 $ 10,428 Totals: $0 $448 $0 $24,663 $25,111 $15,037 =30-year LCC Totals: $98 $134 $0 $7,399 $7,631 $4,609 =30-year LCC pg. 38

39 ECM #2 Calculations Space Description Number of Fixtures Lamps per Fixture 1 1 Lamp Type 60w Incandescents CFL Fixture Wattage Hours on per Week of New Lamp $19.58 of New Fixture Total KWH $ $49.74 Total Demand $64.97 $19.49 Total Yearly $ $69.23 Yearly Savings $ Total Retrofit $ Payback Period Retrofit Description Interior Incandescent Lamps 1.5 years Replace existing interior incandescent lamps with 18w compact fluorescent lamps. pg. 39

40 A N N U A L R E A L C A S H F L O W S C U R R E N T A N N U A L R E A L C A S H F L O W S P R O P O S E D (Begin) First & Annual Annual Annual Total Present Present Present (Begin) First & Annual Annual Annual Total Present Present Present resent Value o Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Cumulative s s s s s Factor Annual Cumulative s s s s s Factor Annual Cumulative Savings 2,012 $5 $ - $231 $235 (1+i)^-n s s 2,012 $235 $1 $ - $69 $71 (1+i)^-n s s 2,012 $ $ $0 $ - 2,012 $ $ $235 $235 2, $ , $305 $ (71) 2, $ 2, $376 $ 93 2, $ 2, $446 $ 257 2, $ 2, $515 $ 419 2, ,168 $ 2, $585 $ 582 2, ,401 $ 2, $655 $ 746 2, ,634 $ 2, $725 $ 909 2, ,868 $ 2, $795 $ 1,072 2, ,102 $ 2, $865 $ 1,236 2, ,336 $ 2, $936 $ 1,400 2, ,570 $ 2, $1,006 $ 1,564 2, ,804 $ 2, $1,076 $ 1,728 2, ,039 $ 2, $1,147 $ 1,892 2, ,274 $ 2, $1,217 $ 2,057 2, ,513 $ 2, $1,289 $ 2,224 2, ,755 $ 2, $1,362 $ 2,394 2, ,002 $ 2, $1,435 $ 2,566 2, ,252 $ 2, $1,511 $ 2,742 2, ,507 $ 2, $1,587 $ 2,920 2, ,766 $ 2, $1,665 $ 3,101 2, ,028 $ 2, $1,743 $ 3,285 2, ,296 $ 2, $1,824 $ 3,472 2, ,567 $ 2, $1,905 $ 3,662 2, ,843 $ 2, $1,988 $ 3,855 2, ,123 $ 2, $2,072 $ 4,051 2, ,408 $ 2, $2,157 $ 4,251 2, ,698 $ 2, $2,244 $ 4,453 2, ,992 $ 2, $2,333 $ 4,659 2, ,291 $ 2, $2,422 $ 4,869 2, $ 7,595 2, $2,513 $ 5,081 Totals: $0 $226 $0 $12,456 $12,683 $7,595 =30-year LCC Totals: $235 $68 $0 $3,737 $4,040 $2,513 =30-year LCC pg. 40

41 ECM #3 Calculations Space Description Gym Security Lights Number of Fixtures 4 4 Lamps per Fixture 4 4 Lamp Type T12 T8 Fixture Wattage Hours on per Week of New Lamp of New Fixture $ Total KWH $1, $ Total Demand $70.60 $32.85 Total Yearly $1, $ Yearly Savings $ Total Retrofit $1, Payback Period 2.7 years Retrofit Description Replace 4' 4 lamp T12 gym security lights with 4' 4 lamp T8 fixtures and 25w lamps. pg. 41

42 A N N U A L R E A L C A S H F L O W S C U R R E N T A N N U A L R E A L C A S H F L O W S P R O P O S E D (Begin) First & Annual Annual Annual Total Present Present Present (Begin) First & Annual Annual Annual Total Present Present Present resent Value o Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Cumulative s s s s s Factor Annual Cumulative s s s s s Factor Annual Cumulative Savings 2,012 $24 $ - $1,192 $1,215 (1+i)^-n s s 2,012 $1,747 $11 $ - $554 $565 (1+i)^-n s s 2,012 $ $ $0 $ - 2,012 $1, $1, $1,747 $1,747 2, ,224 1, ,212 $ 1, , $2,311 $ (1,099) 2, ,257 1, ,208 $ 2,420 2, $2,873 $ (453) 2, ,291 1, ,205 $ 3,625 2, $3,434 $ 191 2, ,326 1, ,202 4,827 $ 2, $3,993 $ 834 2, ,367 1, ,203 6,030 $ 2, $4,553 $ 1,477 2, ,409 1, ,204 7,233 $ 2, $5,113 $ 2,121 2, ,453 1, ,205 8,438 $ 2, $5,673 $ 2,765 2, ,498 1, ,206 9,645 $ 2, $6,234 $ 3,410 2, ,544 1, ,207 $ 10,852 2, $6,796 $ 4,056 2, ,592 1, ,208 $ 12,060 2, $7,358 $ 4,702 2, ,641 1, ,210 13,270 $ 2, $7,921 $ 5,349 2, ,692 1, ,211 14,481 $ 2, $8,484 $ 5,996 2, ,745 1, ,212 $ 15,693 2, $9,048 $ 6,645 2, ,799 1, ,213 $ 16,906 2, $9,612 $ 7,293 2, ,883 1, ,233 $ 18,138 2, $10,186 $ 7,952 2, ,972 2, ,253 $ 19,391 2, $10,769 $ 8,622 2, ,065 2, ,273 $ 20,664 2, $11,361 $ 9,303 2, ,162 2, ,294 $ 21,957 2, ,006 1, $11,963 $ 9,995 2, ,263 2, ,314 $ 23,272 2, ,053 1, $12,574 $ 10,698 2, ,370 2, ,336 $ 24,608 2, ,102 1, $13,196 $ 11,412 2, ,481 2, ,357 $ 25,965 2, ,154 1, $13,827 $ 12,138 2, ,597 2, ,379 $ 27,344 2, ,208 1, $14,469 $ 12,876 2, ,720 2, ,402 $ 28,746 2, ,265 1, $15,121 $ 13,625 2, ,847 2, ,425 30,171 $ 2, ,325 1, $15,784 $ 14,387 2, ,981 3, ,448 31,619 $ 2, ,387 1, $16,457 $ 15,161 2, ,121 3, ,471 33,090 $ 2, ,452 1, $17,142 $ 15,948 2, ,268 3, ,495 34,585 $ 2, ,520 1, $17,837 $ 16,747 2, ,422 3, ,519 36,104 $ 2, ,592 1, $18,544 $ 17,560 2, ,582 3, ,544 37,648 $ 2, ,667 1, $19,263 $ 18,386 2, ,751 3, ,569 $ 39,217 2, ,745 1, $19,993 $ 19,225 Totals: $0 $1,168 $0 $64,321 $65,489 $39,217 =30-year LCC Totals: $1,747 $543 $0 $29,924 $32,215 $19,993 =30-year LCC pg. 42

43 ECM #4 Calculations Space Description T8 fixtures throughout. Number of Fixtures Lamps per Fixture 1 1 Lamp Type 4' T8 4' T8 Fixture Wattage Hours on per Week of New Lamp $17.38 of New Fixture Total KWH $8, $6, Total Demand $3, $2, Total Yearly $11, $8, Yearly Savings $2, Total Retrofit $19, Payback Period 7.7 years Retrofit Description Replace existing lamps in T8 fixtures with 25w lamps. pg. 43

44 A N N U A L R E A L C A S H F L O W S C U R R E N T A N N U A L R E A L C A S H F L O W S P R O P O S E D (Begin) First & Annual Annual Annual Total Present Present Present (Begin) First & Annual Annual Annual Total Present Present Present resent Value o Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Cumulative s s s s s Factor Annual Cumulative s s s s s Factor Annual Cumulative Savings 2,012 $228 $ - $11,405 $11,633 (1+i)^-n s s 2,012 $19,327 $178 $ - $8,910 $9,088 (1+i)^-n s s 2,012 $ $ $0 $ - 2,012 $19, $19, $19,327 $19,327 2, ,712 11, ,599 $ 11, , ,150 9, ,062 $28,389 $ (16,789) 2, ,029 12, ,566 23,166 $ 2, ,397 9, ,036 $37,425 $ (14,259) 2, ,353 12, ,533 34,699 $ 2, ,651 9, ,010 $46,435 $ (11,736) 2, ,687 12, ,500 46,199 $ 2, ,912 10, ,985 $55,420 $ (9,220) 2, ,080 13, ,511 57,711 $ 2, ,219 10, ,993 $64,413 $ (6,702) 2, ,486 13, ,522 69,233 $ 2, ,536 10, ,002 $73,415 $ (4,182) 2, ,904 14, ,533 80,766 $ 2, ,862 11, ,010 $82,425 $ (1,659) 2, ,335 14, ,544 92,310 $ 2, ,199 11, ,019 $91,444 $ 866 2, ,779 15, , ,865 $ 2, ,546 11, ,027 $100,471 $ 3,394 2, ,237 15, , ,431 $ 2, ,904 12, ,036 $109,507 $ 5,924 2, ,710 16, , ,009 $ 2, ,273 12, ,045 $118,552 $ 8,457 2, ,197 16, , ,597 $ 2, ,654 12, ,053 $127,605 $ 10,991 2, ,699 17, , ,196 $ 2, ,046 13, ,062 $136,667 $ 13,529 2, ,217 17, , ,806 $ 2, ,450 13, ,071 $145,738 $ 16,069 2, ,026 18, , ,604 $ 2, ,083 14, ,217 $154,955 $ 18,649 2, ,873 19, , ,593 $ 2, ,744 15, ,366 $164,321 $ 21,272 2, ,760 20, , ,777 $ 2, ,437 15, ,518 $173,840 $ 23,937 2, ,689 21, , ,157 $ 2, ,163 16, ,672 $183,512 $ 26,645 2, ,661 22, , ,738 $ 2, ,923 17, ,829 $193,341 $ 29,397 2, ,679 23, , ,523 $ 2, ,718 18, ,988 $203,329 $ 32,194 2, ,745 24, , ,515 $ 2, ,551 18, ,150 $213,479 $ 35,036 2, ,861 25, , ,718 $ 2, ,423 19, ,315 $223,794 $ 37,924 2, ,030 26, , ,135 $ 2, ,336 20, ,482 $234,276 $ 40,859 2, ,253 27, , ,770 $ 2, ,291 21, ,652 $244,928 $ 43,842 2, ,534 29, , ,626 $ 2, ,292 22, ,825 $255,753 $ 46,873 2, ,875 30, , ,707 $ 2, ,340 23, ,001 $266,754 $ 49,953 2, ,279 31, , ,016 $ 2, ,437 24, ,179 $277,933 $ 53,083 2, ,749 33, , ,558 $ 2, ,585 25, ,361 $289,294 $ 56,264 2, ,288 34, , ,337 $ 2, ,788 27, ,545 $300,840 $ 59,497 2, ,900 36, ,018 $ 375,355 2, ,047 28, ,733 $312,573 $ 62,782 Totals: $0 $11,177 $0 $615,626 $626,803 $375,355 =30-year LCC Totals: $19,327 $8,732 $0 $480,958 $509,016 $312,573 =30-year LCC pg. 44

45 ECM #5 Calculations Horsepower Motor Loading Efficiency KW Operating Hours/yr Yearly KW Demand Yearly KW Demand Yearly KWH Consumption Yearly KWH Existing $ ,070 $2, $2, Proposed $ ,169 $1, $1, Savings $ ,901 $ $ Installed $7, Payback (years) 7.80 Description of Improvement Replace current Grundfos UP circulation pumps in original utility room with equivalent permanent magnet, variable speed pump. Totals pg. 45

46 A N N U A L R E A L C A S H F L O W S C U R R E N T A N N U A L R E A L C A S H F L O W S P R O P O S E D (Begin) First & Annual Annual Annual Total Present Present Present (Begin) First & Annual Annual Annual Total Present Present Present resent Value o Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Year Replace. Maint. Nat.Gas Electric Annual Worth Worth of Worth of Cumulative s s s s s Factor Annual Cumulative s s s s s Factor Annual Cumulative Savings 2,012 $48 $ - $2,413 $2,461 (1+i)^-n s s 2,012 $7,060 $30 $ - $1,508 $1,538 (1+i)^-n s s 2,012 $ $ $0 $ - 2,012 $7, $7, $7,060 $7,060 2, ,478 2, ,454 $ 2, , ,549 1, ,534 $8,593 $ (6,139) 2, ,545 2, ,447 4,901 $ 2, ,590 1, ,529 $10,123 $ (5,222) 2, ,613 2, ,440 7,341 $ 2, ,633 1, ,525 $11,648 $ (4,307) 2, ,684 2, ,433 9,774 $ 2, ,678 1, ,521 $13,168 $ (3,394) 2, ,767 2, ,435 12,209 $ 2, ,730 1, ,522 $14,690 $ (2,481) 2, ,853 2, ,438 14,647 $ 2, ,783 1, ,524 $16,214 $ (1,567) 2, ,941 3, ,440 17,087 $ 2, ,838 1, ,525 $17,739 $ (652) 2, ,033 3, ,442 19,529 $ 2, ,895 1, ,526 $19,265 $ 264 2, ,127 3, ,445 21,974 $ 2, ,954 1, ,528 $20,793 $ 1,180 2, ,224 3, ,447 24,421 $ 2, ,015 2, ,529 $22,323 $ 2,098 2, ,324 3, ,449 26,870 $ 2, ,077 2, ,531 $23,853 $ 3,017 2, ,427 3, ,452 29,322 $ 2, ,142 2, ,532 $25,386 $ 3,936 2, ,533 3, ,454 31,775 $ 2, ,208 2, ,534 $26,919 $ 4,856 2, ,642 3, ,456 34,232 $ 2, ,276 2, ,535 $28,455 $ 5,777 2, ,814 3, ,496 36,728 $ 2, ,383 2, ,560 $30,015 $ 6,713 2, ,993 4, ,536 39,264 $ 2, ,495 2, ,585 $31,600 $ 7,664 2, ,180 4, ,577 41,842 $ 2, ,613 2, ,611 $33,211 $ 8,631 2, ,377 4, ,619 44,461 $ 2, ,736 2, ,637 $34,848 $ 9,613 2, ,583 4, ,662 47,123 $ 2, ,864 2, ,664 $36,511 $ 10,611 2, ,798 4, ,705 49,827 $ 2, ,999 3, ,690 $38,202 $ 11,626 2, ,023 5, ,749 52,576 $ 2, ,140 3, ,718 $39,920 $ 12,656 2, ,260 5, ,793 55,369 $ 2, ,287 3, ,746 $41,665 $ 13,704 2, ,507 5, ,839 58,208 $ 2, ,442 3, ,774 $43,439 $ 14,768 2, ,766 5, ,885 61,092 $ 2, ,604 3, ,803 $45,242 $ 15,850 2, ,037 6, ,931 64,024 $ 2, ,773 3, ,832 $47,074 $ 16,949 2, ,320 6, ,979 67,003 $ 2, ,950 4, ,862 $48,936 $ 18,066 2, ,617 6, ,027 70,030 $ 2, ,136 4, ,892 $50,828 $ 19,202 2, ,928 7, ,076 73,106 $ 2, ,330 4, ,923 $52,751 $ 20,355 2, ,254 7, ,126 76,233 $ 2, ,534 4, ,954 $54,705 $ 21,528 2, ,595 7, ,177 $ 79,410 2, ,747 4, ,986 $56,691 $ 22,719 Totals: $0 $2,365 $0 $130,242 $132,606 $79,410 =30-year LCC Totals: $7,060 $1,478 $0 $81,401 $89,939 $56,691 =30-year LCC pg. 46