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HomeMy WebLinkAboutInvestment Grade Energy Audit Buckland School 05-22-2012-EE Con Audit pe Energy Au P.O. Bo Anchorag ntact: Jim Fow Jim@jim 206.9 Rich Investm Owner: Th Client rformed by: udits of Alaska ox 220215 ge, AK 98522 wler, PE, CEA m-fowler.com 954.3614 hard S. Ar Mechanical/ ment G Buckl he Northwest t: Alaska Ho Ma Project # NA a A#1705 rmstrong, /Electrical Eng rade En and Scho t Arctic Borou using Finance ay 22, 2012 ABSD-BKC-R Co , PE, LLC gineer nergy A ool gh School Di e Corporation RSA-01 Pr Richard S 2321 M Anch ontact: Dick A darms 9 C Audit strict n ime Contracto S. Armstrong, Merrill Field Dr horage, AK 99 Armstrong, PE CEA #178 strong@rsa-a 907.276.0521 or: , PE, LLC rive, C-6 9501 E, CEM #1355 k.com 1 57, ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 2 of 72 Project # NABSD-BKC-RSA-01 Prepared for: The Northwest Arctic Borough School District May 22, 2012 Subject Building: The Buckland School Airport Road Buckland, AK 99727 ____________________________________________________________ Audit performed by: _______________________________ James Fowler, PE, CEA #1705 Prime Contractor: _______________________________ Richard S. Armstrong, PE, CEM, CEA ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 3 of 72 TABLE OF CONTENTS 1. Executive Summary 5 2. Audit and Analysis Background 14 3. Acknowledgements 16 4. Building Description & Function 17 5. Historic Energy Consumption 19 6. Interactive Effects of Projects 19 7. Loan Program 19 APPENDICES Appendix A: Photos 21 Appendix B: AkWarm-C Report 27 Appendix C: Equipment Schedules 33 Appendix D: Additional, Building-Specific EEM detail 42 Appendix E: Specifications supporting EEM’s 53 Appendix F: Benchmark Data 59 Appendix G: Building Plans & Schematics 63 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 4 of 72 REPORT DISCLAIMERS This audit was performed using American Recovery and Reinvestment Act (ARRA) funds, managed by the Alaska Housing Finance Corporation (AHFC). 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 Statute as well as Illuminating Engineering Society (IES) recommendations. Energy Audits of Alaska, LLC 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 Efficiency Measures (EEMs), or the operating schedules and maintenance provided by the owner. Furthermore, EEMs are typically interactive, so implementation of one EEM may impact the cost savings from another EEM. Neither the auditor, Central Alaska Engineering Company, AHFC, or any other party involved in preparation of this report accepts liability for financial loss due to EEMs that fail to meet the forecasted payback periods. This audit meets the criteria of an Investment Grade Audit (IGA) per the Association of Energy Engineers definition, and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of the AHFC. IGA’s are the property of the State, and may be incorporated into AkWarm-C, the Alaska Energy Data Inventory (ARIS), or other state and/or public information system. 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. ENERGY May 2 1. E B B G T o e im a A th T (A a a A T m in (H m AUDITS OF 22, 2012 Executive S uilding Owne Northw Scho 744 Ea Kotzeb uilding contac Terri W 907-49 twalke Guidance to The Executi wner/opera fficiency c mprovemen nd their es Appendices he owner/op This audit w ARRA) fund nd environ udit and t Assessment The purpose modification nvestigated HVAC), int managemen ALASKA Summary er: west Arctic Bo ool District ast Third bue, AK 9975 ct: Walker, Princi 94-2127 er@nwarctic.o o the reade ive Summa ator should compares nts should timated an , are back- perator, or was perfor ds to promo mental pro this report t Loans (RE e of the en s, adjustm during the erior and e nt control sy orough 52 pal org er: ary is desig d need to with oth be impleme nual saving -up and pr their staff, d rmed using ote the use blems in a are pre-re EAL) progra nergy audit ments, alte e audit incl exterior lig ystems (EM gned to con determine her similar ented, app gs. Section rovide muc desire to in g American e of innovat way that im equisites t am, which i is to ident erations, a uded heati hting, moto MCS). Alaska Ho P.O. Box Anchorag Contact: Energy Sp 907-330-8 rluhrs@ah ntain all the how the s r use bu proximately ns 2 throug ch more de nvestigate fu n Recovery tion and te mproves th to access s available tify cost-effe additions a ing, ventila ors, buildin BUC ousing Financ 10120 ge, AK 99510- Rebekah Luh pecialist 8141 hfc.us e informatio subject bui uildings, w how much gh 7 of this etailed infor urther. y and Rei echnology to he State’s e AHFC’s R to the build ective syste and retrofi tion, and a ng envelop CKLAND SCH Page 5 of 7 ce Corporatio -1020 hrs on the build ilding’s ene which ene h they will c report and rmation sho nvestment o solve ene economy. Retrofit Ene ding’s owne em and fac ts. Syste air condition e, and ene HOOL 72 on ding ergy ergy cost d the ould act ergy The ergy er. cility ems ning ergy ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 6 of 72 The site visit to this building occurred on April 20th, 2012. The outside ambient temperature was 30F and the relative humidity was 54%. Buckland is a remote village located on the Buckland River which flows north into Eschscholtz Bay, an arm of Kotzebue Sound, on the Chukchi Sea. The village has just over 400 residents. As is typical, the school is the largest building in the village; it was constructed in stages starting in 1977. The original school building consisted of what is now the northeast wing. In 1984 that building was nearly doubled and in 1999 a major addition and renovation was undertaken, creating the current building configuration. There are approximately 170 students and 25 staff. The school has a gymnasium used year round, a wood & engine shop, both used during the school year, a well-equipped commercial kitchen and a secondary kitchen in the cultural classroom which is used by itinerants and for special events. A unique aspect of the 1999 renovation was the use of 6 insulated connexes now located on the metal decking surrounding the building. They house the 15 school boilers, fire sprinkler apparatus and the generator. Overall the interior and exterior of this building is very well maintained, and in very good condition. A second noteworthy aspect is that the school boilers supply heat, domestic hot water and cold water pre-heat to two adjacent housing units. These units were included in the AkWarm-C model. It is strongly recommended to sub-meter this energy outflow, see Appendix D-5. These housings units are not on the school electric meter. Energy Consumption and benchmark data This building utilizes fuel oil for heating and electricity generated by the adjacent village power plant. Fuel oil and electrical benchmark data was provided by Northwest Arctic Borough School District (NABSD) administrative personnel in Kotzebue. Electrical data was consistent and reasonable, as meters are accurate and readings are taken consistently. Several factors combine to make this fuel oil data inconsistent and/or anomalous: 1.) There are 12 school related fuel tanks 2.) Only fuel tank level readings are taken for each tank, not actual consumption 3.) Fuel is moved between tanks and not recorded 4.) Additions to the 12 school tanks are not recorded These factors make it difficult to determine fuel consumption for the school building. It is strongly recommended to install cumulative flow meters on the outlet of each tank to directly measure consumption by the boilers. (See Appendix D-5) Given the current lack of direct measurements, best efforts were ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 7 of 72 made to use available data and create reasonable monthly consumption figures. Calculations, assumptions and results are shown in Appendix F. Summarized values for 12 months of electrical and fuel oil consumption are shown in Table 1 below: Table 1 – Subject Building   12 month period from April 2011‐March 2012    Consumption Cost  Electricity ‐ kWh 336,983 $   156,719  Fuel Oil ‐ gallons 67,954 $   301,853  Totals   $   458,572  A benchmark measure of energy use relative to other similar function buildings in the area is the Energy Use Index (EUI), which takes the total annual energy used by the facility divided by the square footage area of the building, for a value expressed in terms of kBTU/square foot (SF). This number can then be compared to other buildings to see if it is average, higher or lower than similar- use buildings in the area. Likewise, the Energy Cost Index (ECI) is the cost of all energy used by the building expressed in $/SF of building area. The comparison buildings chosen were the Gambell and Shishmaref Schools – the auditor also performed the energy audits on these buildings. The benchmark data for the comparison schools was from 2009 and 2010 and is averaged in Table 2. Table 2 – 2009 & 2010 Average EUI and ECI    Buckland  School   Gambell  School  Shishmaref  School  Continental US Average  for Places of Education**  Energy Use Index  (EUI) ‐ kBTU/SF 223 133 137 75‐102  Energy Cost Index  (ECI) ‐ $/SF $10.11  $6.22  $7.75  ‐  ** Data retrieved from the US Energy Administration database, these figures are for “Places of Education”, the most relevant category tracked by the USEA. Evaluation of energy consumption & benchmark data Table 2 shows that the subject building’s EUI and ECI is substantially higher than the two very similar comparison buildings, the Gambell and Shishmaref Schools. As is typical for Alaskan buildings, a comparison to similar buildings in the ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 8 of 72 0 50 100 150 200 250 Buckland School Gambell School Shishmaref School Fuel Oil EUI Electrical EUI continental US shows Alaska buildings have a much higher EUI – which is to be expected given the weather differences. A deeper investigation into the energy consumption of these three buildings follows: Chart 1 Chart 1 above shows the subject building’s gas and electrical EUI compared to the two other similar use buildings. Fuel Oil consumption: All three of the buildings have a combination of offices, gymnasium, classrooms and a commercial kitchen. Having audited all three buildings, the auditor believes that the fuel oil consumption of this building is excessive, and most likely is a result of either malfunctioning valves, dampers or other heating, ventilation and air conditioning (HVAC) components, or controls that are not properly programmed. This assumes, of course, that the benchmark fuel oil consumption data is reasonably accurate. This discussed in more detail later in this report. Electrical consumption: Based on Chart 1, the subject building’s lower electrical consumption falls between the other two buildings, and appears to be not otherwise noteworthy. The teacher housing electrical consumption is not included in these figures. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 9 of 72 Recommended Energy Efficiency Measures Various Energy Efficiency Measures (EEMs) have been analyzed for this building to determine if they would provide energy savings with reasonably good payback periods. EEMs are recommended for reasons including: 1.) they have a reasonably good payback period 2.) for code compliance 3.) end of life (EOL) replacement 4.) reasons pertaining to efficient building management strategy, operations, maintenance and/or safety All the EEMs considered for this facility are detailed in the attached AkWarm-C Energy Audit Report in Appendix B and in Appendix D. Each EEM includes payback times, estimated installation costs and estimated energy savings. The summary EEM’s that follow are the only EEM’s that are recommended for this building. Others have been considered (See Appendix D-3) but are not considered to be justified or cost effective. The recommended EEM’s were selected based on consideration from three perspectives: overall efficiency of building management, reduction in energy consumption and return on investment (ROI). Efficient building management dictates, as an example: that all lights be upgraded, that lamp inventory variations be minimized and that all appropriate rooms have similar occupancy controls and setback thermostats - despite the fact that a single or several rooms may have an unjustifiably long payback on their individual lighting or controls upgrade. Some of the summary EEM’s below contain individual EEM’s that are grouped by type (i.e. all relevant lighting upgrades are summed and listed as a single upgrade, all thermostat setback retrofits are grouped together and listed as a single upgrade, etc.). They are prioritized as a group, with the highest ROI (shortest payback) listed first. Maintenance savings are included in the “estimated savings” figures below. Table 3 at the end of this section summarizes these EEM’s and Appendix B and Appendix D provide additional detail pertaining to each individual recommendation. A.) SETBACK THERMOSTATS A building-wide replacement of the existing low voltage adjustable thermostats with 7-day digital programmable thermostats appears ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 10 of 72 to be underway. It is recommended to complete this upgrade and set back temperatures to 55F during night time and unoccupied hours. There were five 7-day programmable thermostats in the school fan room, it is assumed that more will have to be purchased and installed, hence the $3500 cost estimated below. Additionally, the DDC controllers should have carbon dioxide (CO2) sensors installed (if not already in place) and the AHU’s should be controlled by room CO2 levels, rather than by schedule. Appendices B-1 and B-5 provide detail for this EEM. Combined Setback Thermostat EEM’s: Estimated cost $ 3,500 Annual Savings $ 32,171 Payback 2 months B.) REFRIGERATION There are 3 full size residential type refrigerators in the school that appear to be greater than 10 years old. At their EOL, they should be replaced with Energy Star versions. See Appendix B-3 for additional detail. Combined refrigeration EEM’s: Estimated cost (incremental difference for the refrigerators) $ 225 Annual Savings $ 412 Payback 7 months C.) MOTOR REPLACEMENTS There are two motors (CP-1 & CP-2) in this building that are not premium efficiency and are operating a sufficient number of hours to justify immediate replacement with premium efficiency models. All motors in this building, 5 HP and greater, are listed in Table 5 of Appendix D-4. There is one additional motor (AHU-1) that should be replaced at its EOL with a premium efficiency version. Motor replacement EEM: Estimated cost to replace 3 motors $ 1,400 Annual Savings $ 1,149 Payback 1.2 years ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 11 of 72 D.) HVAC SYSTEM Retro-commissioning: It is recommended to perform a retro-commissioning of the HVAC system in this building. The fuel oil consumption of this building is higher than it should be. This conclusion is based on 2 observations: the fuel oil EUI is significantly higher than both of the comparison schools in Chart 1, and in order to reconcile the forecasted oil consumption (in AkWarm-C) with actual oil consumption, all the air handlers (AHU’s) had to be entered with 50% outside air (OSA). This OSA value is excessive – it may or may not be the exact reason for the high consumption, but it indicates that there is a problem with the HVAC controls or components. It is recommended to audit and re-commission the system to reduce consumption. Estimated cost for this activity is $12,000. Savings were calculated by AkWarm-C by reducing OSA inputs to 15%. Appendix B-2 contains additional detail. Variable Frequency Drives (VFD’s): It is recommended to add VFD’s to the 7.5 HP fan motors in AHU-1 and AHU-2, the 5 HP fan motors in AHU-3 and AHU-5, and the two 5 HP pump motors in CP-1 and CP-2. See Appendix D-2 for additional detail on VFD’s, and appendix B-2 & B14 for more detail on cost and savings. Boiler replacement: Five of the fifteen boilers appear to be original equipment 1977 models, with an efficiency of 76%. These boilers are at or past their lifetime expectancy. It is recommended to replace them with the same WGO-9 Weil McLain models as the other 10 boilers. See Appendix B-19 for additional detail. Combined HVAC & VFD EEM: Estimated cost $121,084 Annual savings $ 92,992 Payback 1.3 years E.) LIGHTING AND LIGHTING CONTROLS The lighting in this building was upgraded in 1999 with the renovation and addition, but there are still energy efficiencies to be obtained. It is recommended, at the next building re-lamp, to replace all T8-32 watt lamps with T8-28 watt energy saver lamps. It is also recommended to replace the few remaining T12 fixtures with magnetic ballasts with T8 fixtures with high efficiency electronic ballasts. It is recommended to add occupancy sensors to all rooms. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 12 of 72 It is further recommended to replace all exterior high intensity discharge (HID) lighting (High Pressure Sodium, Mercury Vapor and Metal Halide) with LED fixtures. This EEM summarizes Appendix B-3, B-6 through 9, B-11 through 22, B-24 through 32. See Appendix E for more information on occupancy sensors and energy saver 28 watt lamps. Combined Lighting Control EEM’s: Estimated cost $ 46,968 Annual Savings $ 14,567 Payback 3.4 years F.) DESKTOP COMPUTERS & DESK PLUG LOADS Desktop PC’s consume between 200 and 300 watts when in use. Laptops consume between 50 and 100 watts when in use. It is recommended to replace the 45 desktop PC’s with laptops at their EOL. The incremental difference in cost is estimated to be $200 each and although the payback is slightly exceeds the 5 year life expectancy of a laptop, the recommendation is still made. See Appendix B-28. Certain desk-related plug loads such as task lighting, printers, computer monitors, etc. can be turned off automatically by using a plug strip with an integrated occupancy sensor. When you leave your desk area, this equipment will be turned off while a computer, for example, will be left on. See Appendix E for an example of such a device. Estimated cost for these devices is $125 ea, estimated savings is very difficult to calculate, but anecdotal evidence shows up to a 50% savings of desk-related plug electrical consumption Personal Computer EEM: Estimated cost $ 11,000 Annual savings $ 1,886 Payback 5.8 years A summary of the estimated cost totals and estimated annual savings totals of the six (A. through F.) summary EEM’s listed above, is found in Table 3 below, and again at the end of Appendix B. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 13 of 72 Table 3 Combined total of recommended EEM’s  summarized above:  Estimated total cost      $ 184,177  Annual Savings (including  maintenance savings)      $ 143,177  Simple payback       1.3 years  Does not include design or construction management costs In addition to EEM’s, various Energy Conservation Measures (ECM’s) are recommended. ECM’s are policies or procedures to be followed by management and employees that require no capital outlay. ECMs recommended for this facility include: 1. Turn lights off when leaving a room that is not controlled by an occupancy sensor. 2. All man-doors, roll-up doors and windows should be properly maintained and adjusted to close and function properly. 3. Turn off computers, printers, faxes, etc. when leaving the office. See sample plug load management device in Appendix E. 4. Re-configure building occupants and activities (in the case of the Rec Center) to group un-occupied offices (i.e. no tenant or staff using the space) or little used spaces, into the same HVAC zone so that zone’s energy consumption can be set back to minimal levels. 5. A building is a living mini-ecosystem and its use changes. Re- evaluate building usage annually and confirm that building set points, zones, lighting levels, etc. are optimized for the current usage and occupancy. 6. Lamp replacement should be a scheduled, preventative maintenance activity. Re-lamp the entire building or entire usage zones (a zone of the building that has similar lighting usage, so lamps have roughly the same lifetime) as part of a scheduled preventative maintenance routine. This assures all lamps are the same color temperature (e.g. 2700K, 3000K, etc.) which enhances occupant comfort and working efficiency. It also minimizes expense because it is more cost effective to order large quantities of the same lamp, and more labor efficient to dedicate maintenance staff to a single re-lamp activity in a building zone, rather than replace individual lamps as they fail. 7. Replace HVAC filters regularly. Maintain optimal operation of all dampers, actuators, valves and other HVAC components. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 14 of 72 2. Audit and Analysis Background Program Description: This audit included services to identify, develop, and evaluate energy efficiency measures for the subject building. The scope of this project included evaluating the building shell, lighting, hot water generation and HVAC equipment. The auditor may or may not identify system deficiencies if they exist. The auditor’s role is to identify areas of potential savings, many of which may require more detailed investigation and analysis by other qualified professionals. a. Audit Description and Methodology: Preliminary audit information was gathered in preparation for the site survey, including benchmark utility consumption data, floor and lighting plans, and equipment schedules where available. A site visit is then performed to inventory and evaluate the actual building condition, including: i. Building envelope (walls, doors, windows, etc) ii. Heating, ventilating, and air conditioning iii. Lighting systems and controls iv. Building specific equipment v. Plumbing Systems b. Benchmark Utility Data Validation: Benchmark utility data provided through AHFC’s initial phase of their REAL program is validated, confirming that meter numbers on the subject building match the meters from which the energy consumption and cost data were collected. If the data is inaccurate or missing, new benchmark data is obtained. In the event that there are inconsistencies or gaps in the data, the existing data is evaluated and missing data points are interpolated. c. Method of Analysis: The information gathered prior to the site visit and during the site visit is entered into AkWarm-C, an energy modeling software program developed specifically for AHFC to identify forecasted energy consumption. The forecasts can then be compared to actual energy consumption. AkWarm-C also has some pre-programmed EEM retrofit options that can be analyzed with projected energy savings based on occupancy schedules, utility rates, building construction type, building function, existing conditions, and climatic data uploaded to the program based on the zip code of the building. When new equipment is proposed, energy consumption is calculated based on manufacturer’s cataloged information. Energy cost savings are calculated based on the historical energy costs for the building. Installation costs include the labor and equipment required to implement an EEM retrofit, but design and construction management costs are excluded. Cost estimates are +/- 30% for this level of audit, and are derived from one or more of the following: Means Cost Data, industry publications, experience of the auditor, local contractors and/or equipment suppliers. Brown Electric, Haakensen Electric, Proctor Sales, Pioneer Door, ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 15 of 72 and J.P. Sheldon, all in Anchorage, were consulted for some of the lighting, boiler, overhead door and air handling retrofit and/or replacement costs. Maintenance savings are calculated, where applicable, and are added to the energy savings for each EEM. The costs and savings are considered and a simple payback period and ROI is calculated. The simple payback period is based on the number of years that it takes for the savings to pay back the net installation cost (Net Installation costs divided by Net Savings.) In cases where the EEM recommends replacement at EOL, the incremental cost difference between the standard equipment in place, and the higher efficiency equipment being recommended is used as the cost basis for payback calculation. The SIR found in the AkWarm-C report is the Savings to Investment Ratio, defined as the annual savings multiplied by the lifetime of the improvement, divided by the initial installed cost. SIR’s greater than 1.0 indicate a positive lifetime ROI. The life-time for each EEM is entered into AkWarm-C; it is estimated based on the typical life of the equipment being replaced or altered. d. Limitations of the Study: All results are dependent on the quality of input data provided, and may only act as an approximation. Most input data such as building and equipment usage, occupancy hours and numbers, building and HVAC operating hours, etc. was provided to the auditor by on site personnel. In some instances, several methods may achieve the identified savings. This report is not a design document. A design professional, licensed to practice in Alaska and in the appropriate discipline, who is following the recommendations, shall accept full responsibility and liability for the results. Budgetary estimates for engineering and design of these projects in not included in the cost estimate for each EEM recommendation, but these costs can be approximated at 15% of the cost of the work. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 16 of 72 3. Acknowledgements: We wish to acknowledge the help of numerous individuals who have contributed information that was used to prepare this report, including: a. Alaska Housing Finance Corporation (Grantor): AHFC provided the grant funds, contracting agreements, guidelines, and technical direction for providing the audits. AHFC reviewed and approved the final short list of buildings to be audited based on the recommendation of the Technical Service Provider (TSP). b. The Northwest Arctic Borough School District (Owner): The NABSD provided building sizing information, two years fuel oil usage data, building schedules and functions, as well as building age. c. Richard S. Armstrong, PE, LLC (Audit TSP): This is the TSP who was awarded the projects in the Arctic Slope Regional Corporation, Bering Straits area, and the Nana area. The firm gathered all relevant benchmark information, cataloged which buildings would have the greatest potential payback, and with the building owner, prioritized buildings to be audited based on numerous factors, including the Energy Use Index (EUI), the Energy Cost Index (ECI), the age of the building, the size of the building, the location of the building, the function of the building, and the availability of plans for the building. They also trained and assigned their selected sub-contractors to the selected buildings, and performed quality control reviews of the resulting audits. They prepared a listing of potential EEMs that each auditor must consider, as well as the potential EEMs that the individual auditor may notice in the course of his audit. Richard S. Armstrong, PE, LLC also performed some of the audits to assure current knowledge of existing conditions. d. Energy Audits of Alaska (energy auditor): This firm has been selected to provide audits under this contract. The firm has two mechanical engineers, certified as energy auditors and/or professional engineers and has also received additional training from Richard S. Armstrong, PE, LLC to acquire further specific information regarding audit requirements and potential EEM applications. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 17 of 72 4. Building Description and Function: The site visit and survey of subject building occurred on April 20th, 2012. This 45,345 square foot, single story building has a 4284 square foot mezzanine fan room surrounding the gymnasium. Building B, the NW wing (see Appendix G for plans), has 24,903 square feet, building A, the SE wing, has 15,198 square feet of floor area. In addition to the school building, there are two (approximately 24’ x 40’) adjacent housing units whose heat and domestic hot water is supplied by the school boilers. Plans were not available for these buildings, so reasonable assumptions for modular housing were made during the AkWarm-C data entry. The school building is constructed on pilings with glue-lam beams supporting floor joists. Floor insulation in the 1977 portion of building A uses 10” of batt while the 1984 portion of building A, and all of building B use 14-1/2” of batt. Insulation values, as calculated by AkWarm-C are R-33.2 and R-48.5 respectively. Several types of wall construction are used; building B uses 2 x 8 wood stud walls filled with batt for a calculated insulation value of R-21 and most walls in building A use 6-3/4” insulated panels with a calculated insulation value of R-26.4. The roof consist of either 12-1/2” structural insulated panels or 12” joists with sprayed-in foam. In both cases, the nominal insulation value specified in plans is R-50. Exterior walls are covered with beveled wood siding over plywood sheathing. Interior walls are finished with gypsum. All windows in this building are double pane aluminum, with a thermal break, and in good condition. Overall, the building is in excellent condition. Building details are as follows: a. Heating, Cooling, Ventilation and Controls: Heat is provided by (15) oil fired, cast iron boilers with efficiencies of 76% (the 5 old boilers) and 87% (the 10 new ones). Circulation pumps supply heat to finned tube baseboard radiators and radiant panels as well as the AHU coils and unit heaters. Fluid valves on all radiant heaters and in the AHU’s are controlled by local zone, low voltage thermostats – some are manual and some retrofitted with 7-day digital programmable models. The AHU’s and CP-1 and CP-2 are controlled by a series of distributed DDC controllers located throughout the building’s fan and pump rooms. Five of the seven AHU’s are constant volume, two have VFD’s. The single, large relief fan which is not in use (per on site personnel) is also fitted with a VFD. There does not appear to be any heat recovery from exhaust air in this building. There is no cooling in the building. There are (9) circulation pumps and (3) heat exchangers in the SE mechanical room that serve adjacent teacher housing. They ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 18 of 72 pre-heat the cold water supply, provide domestic hot water and glycol circulation for room heat. The school boilers provide heat for these units. b. Appliances: There are (4) full size residential type refrigerators, (2) commercial reach-in refrigerators, a commercial walk-in freezer, (2) electric stove/grill/oven combination units, a large commercial electric double convection oven, a commercial dishwasher and double warming oven. This building has 45 PC’s in use at various times of day. c. Plumbing Fixtures: This building contains a total of (17) toilets, (6) urinals, (28) lavatory sinks with manual valves and (9) with proximity sensing valves. The toilets consume 1.6 gallons per flush (gpf), the urinals 1.0 gpf. See Appendix D-1 for EEM recommendations. d. Domestic Hot Water: Hot water for sinks, showers and the kitchen is provided by (3) indirect, 80 gallon hot water generators located in the mezzanine fan room and a 41 gallon hot water generator located in the SE pump room; the small unit is presumed to serve adjacent teacher housing. e. Interior Lighting & Controls: As previously mentioned, the lighting in this building has been for the most part, upgraded. Room, corridor and office lighting generally consists of T8-32W fixtures with electronic ballasts, although there are halogen spots, recessed metal halide can lights and metal halide pendant fixtures in several rooms. Occupancy sensors are in used primarily in restrooms, storage closets and offices. The old metal halide fixtures are still in place but unused in the gymnasium; the new T5 lighting is in use. Appendix B details the recommendation of a full lighting upgrade. See Appendix E for additional information on occupancy sensors. All exit signs in the building are either LED or unlit, self-luminous. f. Exterior Lighting: There are (14) high pressure sodium (HPS) wall pack lights on the exterior of this building, and (6) HPS soffit lights. g. Building Shell: The building shell is described earlier; it appears to be in excellent condition inside and out.. h. Motors: There are (8) large (5 HP or larger) motors in use in this building. They are listed in Appendix C and were considered for replacement with premium efficiency motors (Appendix D-4) as well as a retrofit with VFD’s. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 19 of 72 5. Historic Energy Consumption: Energy consumption is modeled within the AkWarm-C program. The program analyzes twelve months of data. Normally, two year’s worth of fuel oil and electricity consumption are averaged then input into AKWarm-C. As previously explained, 12 months of data were used for this building. This monthly data is found in Appendix F. Energy consumption was analyzed using two factors: the Energy Cost Index (ECI) and the Energy Use Index (EUI). The energy cost index takes the annual costs of fuel oil and electrical energy over the surveyed period of time, divided by the square footage of the building. The ECI for this building is $10.11/SF, the ECI for two very similar buildings, the Shishmaref School and the Gambell School, are $7.75 and $6.22 respectively. The energy use index (EUI) is the total annual average electrical and heating energy consumption expressed in thousands of BTU/SF. The EUI for this building is 223 kBTU/SF; the average 2009/2010 EUI for the Gambell School is 133 kBTU/SF and 137 kBTU/SF for the Shishamaref School. The average for “Places of Education” buildings across the US is 75-102 kBTU/SF as logged by the US Energy Information Administration. This source data can be viewed at: www.eia.gov/emeu/efficiency/cbecstrends/cbecs_tables_list.htm. 6. Interactive Effects of Projects: The AkWarm-C program calculates savings assuming that all recommended EEM are implemented in the order shown in Appendix B. Appendix D-1, D-4 and D-5 are not included in the AkWarm-C model. If some EEMs are not implemented, savings for the remaining EEMs will be affected, in some cases positively, and in others, negatively. In general, all projects were evaluated sequentially so that energy savings associated with one EEM would not be attributed to another EEM as well. By modeling the recommended projects sequentially, the analysis accounts for interactive effects between 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 contribute to the overall cooling demands of the building; therefore lighting efficiency improvements will reduce cooling requirements on air conditioned buildings. Conversely, lighting efficiency improvements are anticipated to increase heating requirements slightly. Heating penalties resulting from reductions in building electrical consumption are included in the lighting analysis that is performed by AkWarm-C. 7. Loan Program: The Alaska Housing Finance Corporation (AHFC) Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State of Alaska program enacted by the Alaska Sustainable Energy Act (senate Bill 220, A.S. 18.56.855, “Energy Efficiency Revolving Loan Fund). The AEERLF will provide loans for energy efficiency retrofits to public facilities via the Retrofit Energy Assessment ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 20 of 72 for Loan System (REAL). As defined in 15 AAC 155.605, the program may finance energy efficiency improvements to buildings owned by: a. Regional educational attendance areas; b. Municipal governments, including political subdivisions of municipal governments; c. The University of Alaska; d. Political subdivisions of the State of Alaska, or e. The State of Alaska Native corporations, tribal entities, and subsidiaries of the federal government are not eligible for loans under this program. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 21 of 72 Appendix A - Photos Connex’s 1, 2 & 3 on NW side of school, with boilers 1 through 10; generator connnex on far right Connex’s 4, 5 & 6 on SE side of school, with boilers 11 through 15; fire sprinkler in nearest connex. The far right connex is used for storage. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 22 of 72 Teacher housing on south side of School Outside air dampers on AHU-2 100% open, unit not running at the time, they should be closed ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 23 of 72 Library – considered for “daylight harvesting” due to excellent ambient light Cultural room with second kitchen used by itinerant’s ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 24 of 72 Commercial kitchen Retrofitted 7-day programmable thermostats & inventory in fan room ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 25 of 72 One of the local DDC controllers used by AHU’s and CP-1 & 2 AHU map ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 26 of 72 Aerial View of Buckland The Buckland School Building 1999 construction 1977 and 1984 construction NORTH Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 27   ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 5/21/2012 4:10 PM General Project Information  PROJECT INFORMATION AUDITOR INFORMATION  Building: Buckland School Auditor Company: Energy Audits of Alaska  Address: Airport Road Auditor  Name: James Fowler  City: Buckland Auditor Address: P.O. Box 220215    Anchorage, AK 99522  Client Name: Terri Walker  Client Address: Airport Rd  Buckland, AK 99727  Auditor Phone: (206) 954‐3614  Auditor FAX: (   )    ‐  Client Phone: (907) 494‐2127 Auditor Comment:   Client FAX:   Design Data  Building Area: 47,265 square feet  (School Building is  45,345 square feet, adjacent teacher housing is estimated  to be 1920 square feet)   Design Heating Load: Design Loss at Space:  3,499,123  Btu/hour   with Distribution Losses:  4,373,904 Btu/hour   Plant Input Rating assuming 82.0% Plant Efficiency and  25% Safety Margin: 6,667,536 Btu/hour   Note: Additional Capacity should be added for DHW load,  if served.  Typical Occupancy: 203 people  Design Indoor Temperature: 70 deg F (building average)  Actual City: Buckland Design Outdoor Temperature: ‐40 deg F  Weather/Fuel City: Buckland Heating Degree Days: 16,462 deg F‐days     Utility Information  Electric Utility: Buckland, City of ‐ Commercial ‐ Lg Natural Gas Provider: None  Average Annual Cost/kWh: $0.474/kWh Average Annual Cost/ccf: $0.000/ccf     Annual Energy Cost Estimate  Description Space  Heating  Space  Cooling  Water  Heating Lighting Refriger ation  Other  Electrical  Ventilation  Fans  Service  Fees Total Cost  Existing  Building  $275,366 $0 $66,515 $49,543 $7,183 $39,591 $25,142 $0 $463,339  With  Proposed  Retrofits  $179,994 $0 $59,613 $31,267 $6,614 $29,376 $14,849 $0 $321,712  SAVINGS $95,372 $0 $6,902 $18,276 $569 $10,214 $10,293 $0 $141,627    Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 28                     $0 $100,000 $200,000 $300,000 $400,000 $500,000 Existing Retrofit Ventilation and Fans Space Heating Refrigeration Other Electrical Lighting Domestic Hot Water Annual Energy Costs by End Use Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 29   PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Setback Thermostat:  Classrooms, offices,  corridors and all  other rooms  Implement a Heating Temperature  Unoccupied Setback to 55.0 deg F  for the Classrooms, offices,  corridors and all other rooms space.  $30,555 $2,000 207.39 0.1 2  (see   Appe ndix  D‐2  for  detai l)  HVAC Add variable frequency drives  (VDF's) to AHU‐1, AHU‐2, AHU‐3  and AHU‐5, estimated to save 59%‐ 68% energy per Yaskawa Energy  Predictor software (see Appendix D‐ 2) @ total cost of $22,690; retro‐ commission HVAC system to reduce  OSA to minimums required by to  keep CO2 levels per code (OSA  assumed to be 25% for purposes of  estimating energy savings)  estimated cost $12,000  $74,469 $34,690 28.60 0.5 3 Refrigeration:  Residential  Refrigerator  Replace with 3 Energy Star version $412 $225 14.79 0.5 4 Setback Thermostat:  Gym and entry  corridors  Implement a Heating Temperature  Unoccupied Setback to 55.0 deg F  for the Gym and entry corridors  space.  $1,616 $1,500 14.62 0.9 5 Lighting:  Maintenance:  Incandescent, add  OS  Replace with 3 FLUOR CFL, A Lamp  15W  $107 $45 14.36 0.4 6 Lighting: School: T8‐ 3lamp, OS added to  circuit under  previous EEM  At next building re‐lamp, Replace  (4) 32 watt lamps with 4 FLUOR (3)  T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic  $28 $12 14.25 0.4 7 Lighting: Exterior:  HPS‐70, Walkway  lights  Replace with LED 20W Module  StdElectronic  $76  + $10 Maint.  Savings  $75 12.51 1 8 Lighting: Exterior:  HPS‐70, Wall pack  Replace with 8 LED 20W Module  StdElectronic ***  $605  + $80 Maint.  Savings  $600 12.51 1 9 Lighting: School: T8‐ 2lamp, OS added to  circuit under  previous EEM  At next building re‐lamp, Replace  (12) 32 watt lamps with 12 FLUOR  (2) T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic  $57 $36 9.47 0.6 10 Lighting: Exterior:  HPS‐50, Soffit  Replace with 4 LED 17W Module  StdElectronic  $200  + $40 Maint.  Savings  $300 8.80 1.5 Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 30   PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 11 Lighting: Exterior:  HPS‐50, Wall pack  Replace with 6 LED 17W Module  StdElectronic  $300  + $60 Maint.  Savings  $450 8.79 1.5 12 Lighting: School: T8‐ 3lamp, already OS  At next building re‐lamp, Replace  (13) 32 watt lamps with 13 FLUOR  (2) T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic  $38 $39 5.85 1 13 Lighting: School: T8‐ 2lamp, already OS  At next building re‐lamp, Replace  (45) 32 watt lamps with 45 FLUOR  (2) T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic  $131 $135 5.84 1 14  (see  Appe ndix  D‐2  for  detai l)  Other Electrical: CP‐1  & CP‐2 main glycol  circ pumps in  Connex 1  Replace now with 2 premium  efficiency motors, then add VFD's  $4,630 $11,394 5.50 2.5 15 Lighting: School: CFL‐ 4lamp, add OS  Remove Manual Switching and Add  new Occupancy Sensor  $176 $200 5.31 1.1 16 Lighting: School: T8‐ 3lamp, add OS  At next building re‐lamp, Replace  (235) 32 watt lamps with 235  FLUOR (3) T8 4' F32T8 28W Energy‐ Saver Instant StdElectronic and  Remove Manual Switching and Add  new Occupancy Sensor  $6,241 $7,355 5.11 1.2 17 Lighting: Gym: T5‐ 6lamp, add OS  Remove Manual Switching and Add  new Occupancy Sensor  $1,289 $1,600 4.86 1.2 18 Lighting: School: T8‐ 1lamp, OS added to  circuit under  previous EEM  At next building re‐lamp, Replace  (16) 32 watt lamps with 16 FLUOR  T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic  $37 $48 4.68 1.3 19 HVAC Boiler  replacement  Replace (5) 76% efficiency boilers  with Weil McLain WGO‐9 (same as  other 10 boilers) @ $3500 ea for  the boiler, $2000 ea for shipping  and $50,000 for installation.  $13,893  + $1,000 Maint.  Savings  $75,000 3.43 5.4 20 Lighting:  Maintenance: T8‐ 2lamp, add OS  At next building re‐lamp, Replace  (2) 32 watt lamps with 2 FLUOR (2)  T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $98 $206 2.88 2.1 Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 31   PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 21 Lighting: School: T8‐ 2, 96", add OS  Remove Manual Switching and Add  new Occupancy Sensor  $89 $200 2.68 2.3 22 Lighting: Gym: T8‐ 2lamp, add OS  At next building re‐lamp, Replace  (34) 32 watt lamps with 34 FLUOR  (2) T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $1,082 $2,502 2.62 2.3 23 Lighting: School: CFL‐ 2lamp, add OS  Remove Manual Switching and Add  new Occupancy Sensor  $329 $1,200 1.65 3.7 24 Lighting: School: T8‐ 3lamp, add OS  At next building re‐lamp, Replace  (7) 32 watt lamps with 7 FLUOR (3)  T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $189 $1,021 1.11 5.4 25 Lighting:  Maintenance:  Incandescent, add  OS  Remove Manual Switching and Add  new Occupancy Sensor  $29 $200 0.88 6.9 26 Lighting: Kitchen: T8‐ 3lamp, add OS  At next building re‐lamp, Replace  (12) 32 watt lamps with 12 FLUOR  (3) T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $120 $836 0.86 7 27 Lighting:  Maintenance: T12‐ 2lamp, add OS  Replace with 6 FLUOR (2) T8 4'  F32T8 28W Energy‐Saver Instant  HighEfficElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $423  + $60 Maint.  Savings  $4,600 0.86 10.9 28 Other Electrical:  Desktop Computers  Replace with 55 Laptop and  Improve Manual Switching  $1,886 $11,000 0.77 5.8 29 Lighting: School: T8‐ 2lamp, add OS  At next building re‐lamp, Replace  (36) 32 watt lamps with 36 FLUOR  T8 4' F32T8 28W Energy‐Saver  Instant StdElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  **  $338 $3,108 0.66 9.2 30 Lighting: School:  T12‐2lamp, 96", add  OS  Replace with 10 FLUOR (2) T8 4'  F32T8 28W Energy‐Saver Instant  HighEfficElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  $380  + $100 Maint.  Savings  $7,400 0.53 19.5 Appendix B – Detailed AkWarm-C Report Energy Audit – Energy Analysis and Cost Comparison  AkWarm Commercial Audit Software  Buckland School Page 32   PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 31 Lighting: School:  T12‐2lamp, OS  added to circuit  under previous EEM  Replace with 13 FLUOR (2) T8 4'  F32T8 28W Energy‐Saver Instant  HighEfficElectronic  $444  + $130 Maint.  Savings  $9,100 0.52 20.5 32 Lighting: School:  T12‐2, add OS  Replace with 4 FLUOR (2) T8 4'  F32T8 28W Energy‐Saver Instant  HighEfficElectronic and Remove  Manual Switching and Add new  Occupancy Sensor  *  $187  + $40 Maint.  Savings  $3,600 0.47 19.2 33 Lighting: School:  T12‐2lamp, already  OS  Replace with 3 FLUOR (2) T8 4'  F32T8 28W Energy‐Saver Instant  StdElectronic  $27  + $30 Maint.  Savings  $2,100 0.23 77 THE FOLLOWING EEM’S WERE CALCULATED OUTSIDE OF AkWARM-C. Savings will affect and be affected by the EEM’s listed above, depending on their order of implementation. Appe ndix  D‐1  Plumbing Fixtures:  (17) W.C., (37)  lavatories, (5)  urinals, (8) showers  Replace urinal valves with proximity  sensing on/off controls, replace  urinals with ultra‐low flow and  proximity sensing controls; retrofit  toilet valves with 2‐stage valves  Appe ndix  D‐4  Motor replacements Replace 2 motors with premium  efficiency motors now, replace 1  motor with premium efficiency  motors at EOL; see Table 5  Appendix D‐4 for details.  $1,149 $1,400 16.4 1.2 Appe ndix  D‐5  Fuel metering and  energy sub‐metering  Add cumulative fuel oil flow meters  and BTU meter   $5000/BTU  meter;  $1000/flow  meter (not  included in total  below)    TOTAL $141,627 + $1,550 Maint. Savings $184,177 10.14 1.3 AkWarmCalc Ver  2.2.0.2, Energy Lib 5/18/2012  Sample translations of the nomenclature used above: *(item 32) Replace the existing T12, 2-lamp fixtures with (4) florescent, 2-lamp T8 fixtures with 28watt “energy saver” lamps and high efficiency electronic ballasts; replace the manual switches with the appropriate number and type of occupancy sensors. Occupancy sensors cost from $200 -$300 ea installed. ** (item 29) During the next building re-lamp (i.e. when the lamps were to be replaced anyway, so the cost is the incremental difference between a 32 watt and 28 watt lamp), replace the (36) T8-32 watt lamps with T8-28 watt “energy saver” lamps; the fixture has a standard electronic ballast; also replace the existing manual switches with the appropriate number and type of occupancy sensors. *** (item 8) Replace existing (8) exterior HPS 70watt wall packs with (8) 20 watt LED wall packs. Wall pack is a type of exterior light fixture.   ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 33 of 72 Appendix C – Equipment Schedules ALL SCHEDULES COMPILED FROM PLANS OR ON‐SITE NAMEPLATE OBSERVATION,  WHERE ACCESSIBLE     e= estimated   COOLING AND HEATING ROOFTOP UNIT SCHEDULE  SYMBOL MFGR/MODEL FAN CFM  MOTOR DATA   HP/VOLTS/PH REMARKS  AHU‐1 Temtrol WF‐DH21 9,000 7.5/208/3; 91% Elementary  classrooms  AHU‐2  Temtrol WF‐DH25  10,600 7.5/208/3; 91.7%  Serves Gym, locker  rooms, wt room,  commons  AHU‐3 Temtrol WF‐DH12 5,400 5/208/3; 89.5% Library, culture room,  offices  AHU‐4/MAU‐ 1 Temtrol WF‐DH6  3,000 2/208/3  Kitchen make up air  and heated  ventilation  AHU‐5 Pace A20 (per plans) 7,500 5/208/3 Classrooms  AHU‐6 Bohn HD108LF 3,050 2/230/1; 75.5% old school classrooms;  turned off, cold  AHU‐7 Temtrol FC‐286 1,700 5/208/3 Shop; on VFD, turned  off  FAN SCHEDULE  SYMBOL MOTOR MFGR/MODEL CFM  MOTOR DATA   HP/VOLTS/PH REMARKS  RF‐1 CentriMaster Ventset QBR365 18,200 10/200/3  Building relief air ‐ on  VFD ‐ per on site  personnel, this has  never been used  EF‐1 Penn D16 3,700 2/208/3  located in mezz fan  room; kitchen hood  VF‐1 Dynamaster FQ‐R1204 1,000 .16/115/1  located in connex 1  Boiler room  VF‐2 Dynamaster FQ‐R1204 1,000 .16/115/1  located in connex 2  Boiler room  VF‐3 Dynamaster FQ‐R1204 1,000 .16/115/1  located in connex 3  Generator room  VF‐4 Dynamaster FQ‐R1204 1,000 .16/115/1  located in connex 4  Fire Sprnkler room  EF‐2 Penn Z8S 200 77w/120/1 Kitchen bathroom  EF‐3 Penn Z5H 80 79w/120/1 toilet rooms  EF‐4 Penn Z5H 100 79w/120/1 janitor closet  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 34 of 72 EF‐5 Penn Z8H 300 130w/120/1 weight room  EF‐6 Penn Z12H 1,200 850w/120/1 locker rooms  EF‐7 Kequnee 2C‐3302 810 .33/120/1 fume hood  EF‐8 Penn Zt 35 48w/120/1 utilidor  DESTRATIFICATION FAN SCHEDULE  SYMBOL MOTOR MFGR/MODEL CFM  MOTOR DATA   HP/VOLTS/PH REMARKS  DF‐1 Leading Edge 3620‐1 12,500 75w/115/1    PUMP SCHEDULE   SYMBOL MFGR/MODEL GPM  MOTOR DATA   HP/VOLTS/PH REMARKS  CP‐1 Baldor  275 5/208/3; 81.5%  main glycol circ from  connex 1 (B‐1 through  B‐5)  CP‐2 Baldor  275 5/208/3; 81.5%  main glycol circ from  connex 1 (B‐1 through  B‐5) ‐ alternate  CP‐3 Grundfos 50‐240 65 1300w/208/3 Perimeter FT heat  CP‐4 Grundfos 50‐240 65 1300w/208/3  Perimeter FT heat ‐  alternate  CP‐5 Baldor  152 3/208/3; 82.5%  Mezz fan room;  serves AHU‐2 & 3  CP‐6 Grundfos UPS 32‐80 30 280w/115/1  Provides heat to AHU‐ 4/MAU‐1  CP‐7 Grundfos UPS 40‐160 45 800w/208/3  Hot water generator  circ  CP‐8 Grundfos UPS 15‐42F 8 85w/115/1 on B‐1  CP‐9 Grundfos UPS 15‐42F 8 85w/115/1 on B‐2  CP‐10 Grundfos UPS 15‐42F 8 85w/115/1 on B‐3  CP‐11 Grundfos UPS 15‐42F 8 85w/115/1 on B‐4  CP‐12 Grundfos UPS 15‐42F 8 85w/115/1 on B‐5  CP‐13 Grundfos UPS 15‐42F 8 85w/115/1 on B‐6  CP‐14 Grundfos UPS 15‐42F 8 85w/115/1 on B‐7  CP‐15 Grundfos UPS 15‐42F 8 85w/115/1 on B‐8  CP‐16 Grundfos UPS 15‐42F 8 85w/115/1 on B‐9  CP‐17 Grundfos UPS 15‐42F 8 85w/115/1 on B‐10  CP‐18 Grundfos UPS 15‐58FC 8 85w/115/1 on B‐11  CP‐19 Grundfos UPS 15‐58FC 8 85w/115/1 on B‐12  CP‐20 Grundfos UPS 15‐58FC 8 85w/115/1 on B‐13  CP‐21 Grundfos UPS 15‐58FC 8 85w/115/1 on B‐14  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 35 of 72 CP‐22 Grundfos UPS 15‐58FC 8 85w/115/1 on B‐15  LS‐1 Piranha 2.5 35 2.5/230/3 Lift station pump  LS‐2 Gould SDS1 16 .33/120/1 Lift station pump  CP‐16A Grundfos UPS 15‐42F 8 85w/115/1 DHW re‐circulation  CP‐17A Grundfos UPC 50‐160 45 940w/115/1  located in SE  mechanical room;  presumed glycol circ  to FT & radiant panels  CP‐18A Grundfos UPC 50‐160 45 940w/115/1  located in SE  mechanical room;  presumed glycol circ  to FT & radiant panels  CP‐19A Grundfos UMC 50‐80 20 440w/115/1  located in SE  mechanical room;  presumed glycol circ  to FT & radiant panels  CP‐20A Grundfos UPC 50‐160 45 940w/115/1  located in SE  mechanical room;  presumed glycol circ  to FT & radiant panels  CP‐21A Grundfos UPS 32‐160 35 600w/115/1    THESE PUMPS SERVE TEACHER HOUSING ADJACENT TO THIS BUILDING  CP‐X1 Grundfos UP 26‐99 10 245w/115/1  Loop through HX‐ 1serves teacher  housing ‐ next door to  school building  CP‐X2 Grundfos UP 26‐99 10 245w/115/1  Loop through HX‐ 1serves teacher  housing ‐ next door to  school building  CP‐X3 Grundfos UPS 32‐160 30 625/115/1  Loop through HX‐ 1serves teacher  housing ‐ next door to  school building  CP‐X4 Grundfos 15‐42SF 8 85w/115/1  serves teacher  housing ‐ DHW supply  CP‐X5 Grundfos 15‐42SF 8 85w/115/1  serves teacher  housing ‐ DHW return  CP‐11X Grundfos UPS 15‐42F 8 85w/115/1  Isolation loop thru  HX‐2 glycol/water for  DHW heating for  teacher housing  CP‐22X Grundfos UPS 15‐42F 8 85w/115/1  Isolation loop thru  HX‐2 glycol/water for  DHW heating for  teacher housing  CP‐12X Grundfos UPS 15‐42F 8 85w/115/1 loop thru HX‐3  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 36 of 72 glycol/water for  teacher housing  CP‐13X Grundfos UPS 15‐42F 8 85w/115/1  loop thru HX‐3  glycol/water for  teacher housing  BOILER SCHEDULE  SYMBOL MFGR/MODEL  MOTOR DATA   HP/VOLTS/PH REMARKS  B‐1  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  In Connex 1; on  Tekmar 268 Boiler  Controller; each boiler  also has 115w/115/1  draft inducer fan  motor on stack  B‐2  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐3  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐4  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐5  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐6  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  In Connex 2; on  Tekmar 268 Boiler  Controller; each boiler  also has 115w/115/1  draft inducer fan  motor on stack  B‐7  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐8  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐9  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐10  Weil McLain WGO‐9; 295 MBH input, 257  MBH output 87% efficient  .14/115/1 burner  motor  B‐11  Weil McLain P766HEAW; 270 MBH input,  205 MBH output 76% efficient  .14/115/1 burner  motor  In Connex 4; on  Tekmar 264 Boiler  Controller, natural  aspiration ‐ no draft  inducer  B‐12  Weil McLain P766HEAW; 270 MBH input,  205 MBH output 76% efficient  .14/115/1 burner  motor  B‐13  Weil McLain P766HEAW; 270 MBH input,  205 MBH output 76% efficient  .14/115/1 burner  motor  B‐14  Weil McLain P766HEAW; 270 MBH input,  205 MBH output 76% efficient  .14/115/1 burner  motor  B‐15  Weil McLain P766HEAW; 270 MBH input,  205 MBH output 76% efficient  .14/115/1 burner  motor      ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 37 of 72 UNIT HEATER SCHEDULE  SYMBOL MFGR/MODEL CFM  MOTOR DATA   HP/VOLTS/PH REMARKS  UH‐1A Modine HS‐63; 29.2 MBH 1,120 .08/115/1  in fire sprinkler  connex #4  UH‐1 Modine HS‐63; 29.2 MBH 1,120 .08/115/1  in generator connex  #3  UH‐2 Modine HS‐63; 29.2 MBH 1,120 .08/115/1  in generator connex  #3  UH‐3 Modine HS‐86S01; 46.6 MBVH 1,340 .13/120/1 kitchen dry storage  UH‐4 Modine HS 24S01; 11.6 MBH 370 .04/115/1  Mezz fan room;  running wild, local  Tstat  UH‐5 Modine HS‐63; 34.7 MBH 1,120 .08/120/1 fan room  UH‐6 Modine HS 24S01; 11.6 MBH 370 .04/115/1  Mezz fan room;  running wild, local  Tstat  UH‐7 Modine HS 165S01; e35 MBH 1,120 .08/115/1  located in small fan  room  UH‐10 Trane UHSA‐030; 30 MBH 1,340 .13/115/1  located in SW  mechanical room  HOT WATER HEATER SCHEDULE   SYMBOL MFGR/MODEL GALLONS  NUMBER OF  ELEMENTS ELEMENT SIZE  HWG‐1 Amtrol WH‐10CDW 80    Indirect hot water  generator, set point  140 F (Kitchen)  HEG‐2 & 3 Amtrol WH‐10CDW 80    Indirect hot water  generator, set point  120 F  HWG‐4 Amtrol WH‐41 (presumed) 41    Indirect hot water  generator, set point  presumed 120 F  PLUMBING FIXTURES   SYMBOL FIXTURE GPF QUANTITY REMARKS    W.C. 1.6 16 manually operated    Urinal 1 5/1 non functional manually operated    Lavatory ‐ 28 manually operated    Lavatory ‐ 9 Proximity Sensor    W.C. 3.5 1 manually operated  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 38 of 72   Shower, est. 2.6 gpm 3 8 manually operated    Utility Sink ‐ 3 manually operated  EQUIPMENT SCHEDULES  SYMBOL FIXTURE QUANTITY  MOTOR DATA   HP/VOLTS/PH REMARKS     Bench Grinder ‐ Craftsman (397‐ 19360) 2 1/230/?      Dust Collector ‐ Delta 3         Drill Press ‐ Delta and  Powermatic 2        Band Saw ‐ Powermatic 1        Table Saw ‐ Rockwell Unisaw 1 5/?/?      Belt Sander ‐ Dayton 1        Chop Saw ‐ Dewalt 1        Coping Saw 1        Router Table ‐ Bosch 1        (3) Simplex Day tanks 2 motors ea .3/115/1  1 each in Connex 1, 2  & 3  PLUG LOAD SUMMARY  SYMBOL FIXTURE QUANTITY  MOTOR DATA   HP/VOLTS/PH REMARKS    Large Printer 2 1200w      Personal Printer 11 85w      Small TV 5        Large TV 11 450w      Laptop 14 85w      Microwave 4        Smart Board 5        Laminating Machine 1 1600w      Russell Condenser 2        Popcorn Machine 1        Slushy Machine 1 1140w      Two range oven 1   Electric    Fan 1        Dishwasher  1   non‐commercial    Electric Hand Dryer 4 2300w 20A and 115volts    Stackable Clothes Washer 1        Stackable Clothes Dryer 1        Pitney Bowes 1        Scoreboard 2      ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 39 of 72    Miscellaneous Hand Held Power  Tools approx 25        Floor Polisher 1        Floor Waxer 1        Commercial Vacuum 1      KITCHEN EQUIPMENT SCHEDULE  SYMBOL FIXTURE QUANTITY  MOTOR DATA   HP/VOLTS/PH REMARKS     Milk Cooler ‐ Silver King  (SK12MAJ) 1 1.36A/115/1 runs continuously     Food Warmer ‐ Seco (ECH 1S34‐ BEH) 1        Grill and Oven ‐ Hobart  1        Stove and Oven ‐ Hobart  1        Convection Oven ‐ Vulcan  1        Warming Tray ‐ Duke (EP305 M) 1 3.75Kw/208/1      Mixer Small ‐ Hobart (A200) 1 .33/115/1      Mixer Large ‐ Hobart (D340) 1 1.5/208/1      Meat Slicer ‐ Berkel (829) 1 180w/120/1      Commercial Coffee 1        Sink Disposal ‐ ISE (SS200‐29) 1 2/208/3      Deep Fryer ‐ GROEN (FPO/1‐3) 1 11.5Kw/208/3  does not appear to be  in use     Walk‐In Freezer ‐ KYSOR 1  (4) .05/208/1  Evaporator ‐ Russell  AE46‐164B  17.4A/208/1 Heater circuit  12.8A/208/3  Condenser ‐ Copeland  LAHA‐032E    Refrigerator ‐ McCall (2‐2020) 1 10.3A/115/1 tall single door    Refrigerator ‐ McCall (2‐2045) 1 10.3A/115/1  short double door  (side by side)  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 40 of 72 LIGHTING SCHEDULE  FIXTURE  TYPE DESCRIPTION LAMPS MOUNTING  NUMBER WATTS TYPE HEIGHT  Wall Pack HPS Exterior, recessed fixture 1 50 wall 12  Wall Pack HPS Exterior, recessed fixture 1 70 wall 12  Recess can HPS Exterior, recessed fixture 1 50 recess soffit  Recess can HPS Exterior, recessed fixture 1 70 pole 20  Recess can HPS Interior, recessed fixture 1 50 recess ceiling  Recess can HPS Interior, recessed fixture 1 70 recess ceiling  T5‐6  Florescent, T5 lamps, electronic  ballast 6 54 surface ceiling  T8‐1 X 24"  Florescent, T8 lamps, electronic  ballast 1 32 surface ceiling  T8‐2  Florescent, T8 lamps, electronic  ballast 2 32 surface ceiling  T8‐2  Parabolic, Florescent, T8 lamps,  electronic ballast 2 32 surface ceiling  T8‐2 X 96"  Florescent, T8 lamps, electronic  ballast 2 32 surface ceiling  T8‐3  Florescent, T8 lamps, electronic  ballast 3 32 surface ceiling  T9  U‐Type plug‐in, Florescent, T9  lamps, electronic ballast 3 40 hanging chandalier  T12‐2 Florescent T12, magnetic ballast 2 40 recess ceiling  T12‐2 X 96" Florescent T12, electronic ballast 2 40 surface ceiling  Low  voltage  spot 12VAC Halogen  1 35 Wire suspended  Recess can CFL, electronic ballast 2 42 recess ceiling  Recess can CFL, electronic ballast 2 17 kitchen fan ceiling  Incandesce nt floor, table and desk lamps 1 60 surface 4'  Pendant  Metal Halide ‐ interior, magnetic  ballast 1 70 hanging 28'  Pendant  Metal Halide ‐ interior, magnetic  ballast 1 100 hanging 28'  Pendant  Metal Halide ‐ interior, magnetic  ballast 1 175 hanging 28'  LED Exit  Sign LED exit sign above doors     hanging ceiling/wall  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 41 of 72 LARGE MOTOR SCHEDULE  Motor  use &  location  (5 HP or  larger) HP/Volts/Ph   Existing  Efficiency  Premium  Efficiency Estimated  annual  usage  (hrs)  Annual  Savings Burn‐out  payback  (yrs/cost)  Replacement  payback  (yrs/cost)  REPLACE IMMEDIATELY WITH PREMIUM EFFICIENCY MOTOR  CP‐1 5/208/3 81.5% 88.5% 4380   $         555.82   .3/$150    1.1/$600   CP‐2  (alternate) 5/208/3 81.5% 88.5% 4380   $         555.82   .3/$150    1.1/$600   REPLACE AT EOL WITH PREMIUM EFFICIENCY MOTOR  AHU‐1 7.5/208/3 91.0% 91.7% 2600 $37.85 5.3/$200 23.8/$900  AHU‐2 7.5/208/3 91.7% 91.7% 4680  Already premium efficiency AHU‐3 5/208/3 89.5% 89.5% 2600  AHU‐5 5/208/3 e89.5% 89.5% 2600  AHU‐7 5/208/3 e89.5% 89.5% 2600 VFD in use; motor replacement not  justified RF‐1 10/200/3 e90.0% 91.7% 0  Efficiency ratings at Full Load, per nameplate  e = estimated because nameplate not accessible or information not on nameplate  Payback figures based on power consumption at 66% of full load     ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 42 of 72 Appendix D Additional, Building-Specific EEM details Appendix D-1: Plumbing fixtures: All urinals should be replaced, or their valves retrofitted with ultra low flow models. The lavatory faucets and urinals should be retrofitted with proximity sensing on/off controls. (9 lavatory faucets utilize proximity sending valves now) All toilets in this building, except one, are 1.6 gallons per flush (gpf) with manual valves, they should be retrofitted with dual flush valves (see below). The single 3.5 gpf unit should be replaced with a 1.6 gpf model. This audit does not include water usage and AkWarm-C does not allow for the modeling of it, but a typical ultra low flow urinal (1 pint to ½ gallon per flush) can save up to 66% of water used, and typically pays back within 3 years, depending on usage. Dual flush toilet valves will typically pay back within 1-3 years, depending on usage. These payback periods are reduced by 66% or more if the fixture or valve is replaced at its EOL rather than while it’s still functioning. For an EOL replacement, the cost used is the incremental difference in cost between an ultra-low-flow fixture and a straight across replacement with the same fixture. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 43 of 72 Appendix D-2: Variable Frequency Drives (VFD’s) If outfitted with a VFD and a programmable input device (PID) which responds to a process parameter such as duct pressure, CO2 levels, or temperature for an AHU or suction or discharge pressure on a pump, a motor has the capability to only produce enough power to meet the demand. There is tremendous savings potential resulting from the relationship between motor load required and resulting fluid or air flow (Affinity Laws). As an example, if 100% of the air flow requires 100% motor’s horsepower, the Affinity laws state that 70% of air (or fluid) flow requires only 34% of the horsepower. By necessity, fan motors and pumps have to be sized for the worst case load scenario, but under normal operating conditions (80-90% of the time), need only be operating at 30%-70% of their full load. VFD’s are recommended for larger, 3-phase motors that are under varying load and duty cycles, such as air handlers, glycol circulation pumps and reciprocating compressor motors. The fan motors in AHU-1, AHU-2, AHU-3 and AHU-5 in this building are recommended to be retro-fitted with VFD’s. Additionally, the two 5 HP circulation pump motors, CP-1 and CP-2 are recommended to be retrofitted with VFD’s. These motor loads and consumption were evaluated using software called, “Energy Predictor”, provided by Yaskawa, a manufacturer of VFD’s; excerpts from the detailed software reports are found below. A 59%-68% reduction in electrical consumption is predicted by the Yaskawa software for these fan and pump motors; these figure were input into AkWarm-C as a reduction in power consumption in the ventilation section for the fan motors and in the electrical loads section for the pump motors; the resulting savings are included in Appendix B-2 & B-14. Note that the percentage reduction in consumption predicted by the Yaskawa software was used in AkWarm- C, rather than the actual KWh energy reduction found in the Yaskawa reports. Table 4   Motor Size Estimated Cost Reduction in energy consumption  AHU‐1 7.5 HP $4,555 68%  AHU‐2 7.5 HP $4,555 68%  AHU‐3 5 HP $3,395 68%  AHU‐5 5 HP $3,395 68%  CP‐1 5 HP $3,395 59%  CP‐2 5 HP $3,395 59%  Overstated savings: It is important to note that if other EEM’s are also incorporated, these savings will be over- stated because they are based solely on the reduction in electrical consumption resulting from the motor speed reduction. When a fan or compressor motor speed is reduced, GPM or CFM is also reduced, so the motor will have to operate at slightly higher load and speed to maintain building parameters, which will erode a small percentage of the electrical savings. Neither the Yaskawa software or the AkWarm-C software has the capability to calculate this iterative condition. The detailed Yaskawa reports follow: ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 44 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 45 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 46 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 47 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 48 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 49 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 50 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 51 of 72 Appendix D-3: Additional EEM’S considered but not recommended Daylight Sensing Light Dimming: Also called “daylight harvesting”, uses sensors to determine the amount of day lighting in a room and dims the room lighting as much as possible while still maintaining pre-determined room light levels. The library in this school has sufficient windows to consider daylight harvesting but upon a brief analysis, the estimated costs to implement this system outweighs the benefits since the library is not in use during 3 of the 6 months when daylight is sufficient. De-Stratification Fans: There was a less than 2 F temperature difference between air at the thermostats and the gymnasium ceiling, and the gym was unoccupied at the time of measurement. This indicates that there would be insufficient advantage resulting from the installation of de-stratification fans in the gymnasium. Headbolt heater controls: The 3 duplex headbolt heater outlets on the exterior of the building do not appear to be in use. Snow machines and ATV’s appear to be the vehicles used in winter. Replacement of aluminum frame windows with plastic, insulated frame windows: Fiberglass or vinyl, insulated frame, double pane windows with a low-e glass coating have an R- value of R-3.4. The existing windows in this building, which are in very good condition, have an R-value of R-1.2. When these windows reach their EOL, they should be replaced with Fiberglass or vinyl, insulated frame, triple pane, low-e coated glass windows, Estimated (calculated by AkWarm-C) cost to replace all the windows in this building is $185,491 and the estimated annual savings is $8,044. The long 23 year payback is the reason it is not recommended until EOL of the current windows. Appendix D-4: Motor replacements with premium efficiency versions At the $.47 per KWH cost of electricity in Buckland, it is cost effective to replace all standard efficiency motors, 5HP or larger, with premium efficiency motors. Depending on the number of annual operating hours, replacement may be justified immediately, or at EOL. See Table 5 below for a complete listing of large motors and their recommended replacement times. Table 5 LARGE MOTOR SCHEDULE  Motor use &  location (5  HP or larger) HP/Volts/Ph   Existing  Efficiency Premium  Efficiency  Estimated  annual  usage  (hrs)  Annual  Savings  Burn‐out  payback  (yrs/cost)  Replacement  payback  (yrs/cost)  REPLACE IMMEDIATELY WITH PREMIUM EFFICIENCY MOTOR  CP‐1 5/208/3 81.5% 88.5% 4380  $  555.82    .3/$150    1.1/$600   CP‐2  (alternate) 5/208/3 81.5% 88.5% 4380  $  555.82    .3/$150    1.1/$600   REPLACE AT EOL WITH PREMIUM EFFICIENCY MOTOR  ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 52 of 72 AHU‐1 7.5/208/3 91.0% 91.7% 2600 $37.85 5.3/$200 23.8/$900  REPLACEMENT WITH PREMIUM EFFICIENCY NOT RECOMMENDED  AHU‐2 7.5/208/3 91.7% 91.7% 4680  Already premium efficiency AHU‐3 5/208/3 89.5% 89.5% 2600  AHU‐5 5/208/3 e89.5% 89.5% 2600  AHU‐7 5/208/3 e89.5% 89.5% 2600 VFD in use; motor replacement not  justified RF‐1 10/200/3 e90.0% 91.7% 0  Efficiency ratings at Full Load, per nameplate  e = estimated because nameplate not accessible or information not on nameplate  Payback figures based on power consumption at 66% of full load     Appendix D-5: Fuel oil metering and adjacent housing sub-metering The lack of accurate energy consumption data, affected by the two factors stated below, is of critical importance to energy reduction efforts for this school building. 1.) Actual fuel consumption by the boilers is not measured 2.) Energy outflow to adjacent housing units is not measured The energy savings and payback periods identified in the EEM’s recommended in this report depend on accurate energy consumption data. If the fuel oil consumption is not accurate, the calculated savings and payback figures may be overly optimistic or pessimistic. Therefore it is strongly recommended to add cumulative flow meters to each tank’s outflow line in the appropriate location to directly measure boiler fuel consumption – regardless of the tank fuel level. See Appendix E for a sample meter. In order to accurately measure consumption for the school building, it is also strongly recommended to add a BTU meter or meters (see sample in Appendix E), to the glycol and electrical circuits serving any building other than the school building and its associated connexes. Estimated costs for installed BTU meters are $5000 each. Estimated costs for installed cumulative flow meters are $1000 ea. It is recommended to add these meters, record 12 months of consumption data, validate (or modify) the benchmark fuel consumption used in this report to determine fuel oil savings and payback figures, adjust as necessary, revise this report and recommendations per the new savings and payback figures, and proceed with the retrofit process. As this issue is primarily related to fuel oil consumption, the savings and payback figures in this report, for electrical EEM’s should not be significantly affected. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 53 of 72 Appendix E – Specifications supporting EEM’s Lighting Controls Occupancy sensors sense the presence of occupants, turn the lights on at a pre-determined level, and then turn the lights off after a programmed time period of no occupancy. Line of sight, motion sensing occupancy sensors can be installed in existing duplex switch boxes, as well as on ceilings. Dual technology sensors are typically ceiling mounted in rooms, lavatories, corridors, vehicle bays and storage areas where obstacles may interfere with line-of-sight sensors. The second technology in these sensors activates lighting based on sound or changes in position, and work even when a person is fully obscured by an obstacle. Zoned occupancy controls are typically recommended for long corridors, large vehicle bays and large storage areas with multiple switches and lighting zones. Zoned controls are designed to activate and de- activate lighting by zone, by row, or even by fixture, based on the location of the occupant. Step-Dim occupancy sensors turn on a portion of room lights (usually 1/3 or 2/3) upon occupancy, and allow the occupant to manually turn on the rest of the lights. Occupancy sensors can reduce power consumption by 25-60%. Paybacks on occupancy sensors range from 1 to 5 years, depending on the light fixture consumption and occupancy of the room. Lighting Management Systems (LMS) today have the capability to manage lighting based on a wide variety of parameters including building usage, daylight conditions and occupancy. They are retro-fittable, and can be stand alone or integrated into a building’s HVAC, alarm or other control systems. Additionally, they can be easily re-configured as a building’s usage or occupancy pattern changes. Sample LMS systems and a sample high bay occupancy sensor (which could be used for zone lighting control) follow. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 54 of 72 Appendix E – Lighting Controls ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 55 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 56 of 72 Appendix E – sample BTU meter ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 57 of 72 ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 58 of 72 Appendix E – sample Cumulative Flow meter for Fuel Flow Measurement ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 59 of 72 Appendix E – sample plug load management device ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 60 of 72 Appendix E – sample plug load management device ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 61 of 72 Appendix F – Benchmark Utility data Creating 12 months of reasonable fuel oil consumption data points from the data available: The 2 bar charts (Charts 6 & 7) at the end of this appendix are required by AkWarm-C, the energy modeling software used for this audit. This is an explanation of how the auditor used the fuel oil data provided to obtain the 12 months of consumption required. This is a sample of the fuel oil data provided (handwritten comments by the auditor, for explanation purposes in this report) for the month of November 2011: ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 62 of 72 0 2000 4000 6000 8000 10000 12000 July Aug Sept Oct Nov Dec Jan Feb Mar APRIL MAY JUNE Chart 2 ‐School day tank (averages 95% of all  consumption) 0 20 40 60 80 100 120 140 160 July Aug Sept Oct Nov Dec Jan Feb Mar APRIL MAY JUNE Chart 3 ‐Other School related tanks (averages 5% of all  consumption) As can be seen, there are 12 fuel oil tanks directly associated with the Buckland School. At the end of each month, each tank’s fuel level, in gallons, is measured. Fuel tank levels from July 2011 through March 2012 were available in the format above. Charts 2 and Chart 3 were created from this data. 2011/2012 Fuel Levels in School Related Tanks Chart 4 below, represents school building consumption, as deciphered from the data provided - with the addition of the three missing months of data (April, May and June). December is an anomaly; the auditor assumes that a there was a delivery of fuel oil to the school building tanks from another bulk tank in the village. ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 63 of 72 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 July Aug Sept Oct Nov Dec Jan Feb Mar APRIL MAY JUNE Chart 4 ‐Change in School tank levels + decrease in bulk tanks fuel  level = Monthly School Consumption ‐10000 0 10000 20000 30000 40000 50000 July Aug Sept Oct Nov Dec Jan Feb Mar APRIL MAY JUNE Chart 5 ‐Four Bullk storage tanks ‐fuel level ‐smoothed and extended Another anomaly: Fuel levels in the 4 bulk tanks were unchanged from July through August of 2011, yet as can be seen in Charts 2 & 3, fuel levels in the school tanks show that fuel was being consumed and/or added through these months. The auditor presumes that the 4 bulk tanks on the school premises were topped off with the first fuel delivery in the spring, and then fuel coming from other village bulk tanks was added to the other school tanks – a similar conclusion explaining the anomalous month of December in Chart 4 above. Chart 5, below, represents is a smoothing of the anomalous month of December, an addition of data for April, May and June, and a modification of data from July through August - all based on a reasonable seasonal usage curve. Chart 5 represents as close an estimation as can be made (using available data) to actual monthly school building fuel oil consumption for the12 months studied – as if all the fuel was delivered from the 4 bulk tanks. This is the data used to create the consumption graphs below, and used in the AkWarm-C building modeling program. April, May and June  are  extrapolated to create  reasonable monthly usage  curve – no data was available  for these months. Negative  fuel levels are a result of the  extrapolated data  – of  course, this did not actually  occur – other tank inventory  would have been used. July, August and  September were  also extrapolated  – Bulk tank levels  did not change  during these  months per data  received  Reasonable data obtained for these months  Extrapolated data ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 64 of 72 $0 $2,000 $4,000 $6,000 $8,000 $10,000 $12,000 $14,000 $16,000 $18,000 $20,000 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 Electric Cost ($)Electric Consumption (kWh)Date (Mon ‐Yr) CHART 7     Buckland School ‐Electric Consumption (kWh) vs. Electric Cost ($) Electric Consumption (kWh) Electric Cost ($) Benchmark Data: 12 Month Fuel Oil and Electricity Consumption (used in AkWarm-C) s                                                              $0.00 $10,000.00 $20,000.00 $30,000.00 $40,000.00 $50,000.00 $60,000.00 0 2000 4000 6000 8000 10000 12000 14000 16000 Oil Cost ($)Oil Consumption (Therms)Date (Mon ‐Yr) CHART 6      Buckland School ‐Oil Consumption (Therms) vs. Oil Cost ($) Oil Consumption (Therms) Oil Cost ($) ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 65 of 72 Appendix G – Plans and Schematics North wing ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 66 of 72 South Wing ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 67 of 72 HVAC Schematics ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 68 of 72 HVAC Schematics ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 69 of 72 HVAC Schematics ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 70 of 72 HVAC Schematics ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 71 of 72 Lighting Plan – Building B ENERGY AUDITS OF ALASKA BUCKLAND SCHOOL May 22, 2012 Page 72 of 72 Lighting Plan – Building A