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Home My WebLink AboutBridge Elementary School Engineering Economic AnalysisPrepared for Prepared by: ENGINEERING ECONOMIC ANALYSIS FOR Bridge Elementary School Lexington, MA October 22, 2010 Bridge Elementary School Garcia, Galuska & DeSousa Consulting Engineer, Inc. EXECUTIVE SUMMARY Section 1.0: Executive Summar The goal of the mechanical lifecycle engineering economic analysis is to asses the performance of various mechanical systems in comparison to a baseline mechanical system. Each option is compared to the baseline system to determine the lowest combined savings over a 25 year cycle to determine the most advantageous system considering electrical costs, gas costs, maintenance costs, and initial construction costs. By comparison of each option to the baseline system, the option with the greatest total life -cycle savings is generally recommended. To further enhance controllability and overall system performance, additional options should be considered that will enhance year round temperature control and comfort at a possible marginal increase in capital cost. Section 1.1: Mechanical System Analysis 1.1.A: Baseline Mechanical System — Classroom Unit Ventilators and Constant Volume Air Handling Units (Replacement in Kind) • Hot water coil unit ventilators serving the academic and support areas • Exhaust fans and existing ductwork to remain and be cleaned for classroom unit ventilator ventilation • Gas -fired roof mounted heating and ventilating unit serving the auditorium /gymnasium • Gas -fired heating /direct expansion cooling constant volume roof mounted air handling unit serving the administration areas • Hot water coil indoor heating and ventilating unit serving the cafeteria • Hot water coil indoor heating and ventilating unit and split system dx cooling units serving the computer classrooms • Hot water coil indoor heating and ventilating unit serving the interior teacher offices • Hot water coil indoor heating and ventilating unit serving the library • Limited use of fintube radiation, convectors, and unit heaters in entryways, corridors, and storage areas • Two -pipe hot water distribution system serving unit ventilators, fintube radiation, hot water coils, and unit heaters • (2) 2,000 MBH high- efficiency gas -fired condensing boiler power plant • Hot water primary pumping with variable frequency drives • Direct digital controls throughout 1.1.13: Mechanical System Option One — Classroom Unit Ventilators with Demand Control Ventilation and Constant Volume Air Handling Units with Demand Control Ventilation (Current Schematic Design) • Hot water coil unit ventilators with demand ventilation controls serving the academic and support areas • Exhaust fans and existing ductwork to remain and be cleaned for classroom unit ventilator ventilation • Gas -fired roof mounted heating and ventilating unit with demand ventilation control serving the auditorium /gymnasium • Gas -fired heating /direct expansion cooling constant volume roof mounted air handling unit with demand ventilation control serving the administration areas • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the cafeteria • Hot water coil indoor heating and ventilating unit with demand ventilation control and split system dx cooling units serving the computer classrooms • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the interior teacher offices • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the library • Limited use of fintube radiation, convectors, and unit heaters in entryways, corridors, and storage areas • Two -pipe hot water distribution system serving unit ventilators, fintube radiation, hot water coils, and unit heaters • (2) 2,000 MBH high- efficiency gas -fired condensing boiler power plant • Hot water primary pumping with variable frequency drives • Direct digital controls throughout 1.1.C: Mechanical System Option Two — Central Ventilation System with Energy Recovery, Variable Air Volume Air Handling Unit, and Constant Volume Air Handling Units with Demand Control Ventilation • Multiple ceiling- mounted diffusers at approximately 200 -300 CFM (2 per classroom, 1 per support area) in the academic, interior teacher offices, and support areas • Dedicated overhead galvanized ventilation distribution system feeding each diffuser • 100% outside air gas -fired rooftop unit with energy recovery wheel providing ventilation to the academic and support areas • Wall- mounted fintube radiation located along the exterior wall in the academic, interior teacher offices, and support areas • Gas -fired roof mounted heating and ventilating unit with demand ventilation control serving the auditorium /gymnasium • Gas -fired heating /direct expansion cooling variable air volume roof mounted air handling unit with variable air volume diffusers serving the administration areas • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the cafeteria • Hot water coil indoor heating and ventilating unit with demand ventilation control and split system dx cooling units serving the computer classrooms • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the library • Limited use of fintube radiation, convectors, and unit heaters in entryways, corridors, and storage areas • Two -pipe hot water distribution system serving fintube radiation, hot water coils, and unit heaters • (2) 1,200 MBH high- efficiency gas -fired condensing boiler power plant • Hot water primary pumping with variable frequency drives • Direct digital controls throughout • Required architectural work for classrooms ductwork, structural supports, and acoustical screens for rooftop units 1.1.D: Mechanical System Option Three — Displacement Ventilation System with Energy Recovery, Variable Air Volume Air Handling Unit, and Constant Volume Air Handling Units with Demand Control Ventilation • Multiple low wall- mounted displacement diffusers at approximately 200 -300 CFM (2 per classroom, 1 per support area) in the academic, interior teacher offices, and support areas • Dedicated overhead galvanized ventilation distribution system feeding each displacement diffuser • 100% outside air gas- fired /direct expansion cooling rooftop unit with energy recovery wheel providing ventilation to the academic, interior teacher offices, and support areas • Wall- mounted fintube radiation located along the exterior wall between displacement diffusers • Gas -fired roof mounted heating and ventilating unit with demand ventilation control serving the auditorium /gymnasium • Gas -fired heating /direct expansion cooling variable air volume roof mounted air handling unit with variable air volume diffusers serving the administration areas • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the cafeteria • Hot water coil indoor heating and ventilating unit with demand ventilation control and split system dx cooling units serving the computer classrooms • Hot water coil indoor heating and ventilating unit with demand ventilation control serving the library • Limited use of fintube radiation, convectors, and unit heaters in entryways, corridors, and storage areas • Two -pipe hot water distribution system serving fintube radiation, hot water coils, and unit heaters • (2) 1,200 MBH high- efficiency gas -fired condensing boiler power plant • Hot water primary pumping with variable frequency drives • Direct digital controls throughout • Required architectural work for classrooms ductwork, structural supports, and acoustical screens for rooftop units 1.1.E: Mechanical System Option Four — Displacement Ventilation System with Energy Recovery, Variable Air Volume Air Handling Unit, and Constant Volume Air Handling Units with Demand Control Ventilation • Multiple four -pipe two coil heating and cooling fan coil units, 100% recirculation air serving the academic, interior teacher offices, and support areas • Dedicated overhead galvanized ventilation distribution system (primary air ducted directly to fan coil unit and supply ductwork on discharge of fan coil unit) • 100% outside air gas- fired /direct expansion cooling rooftop unit with energy recovery wheel providing ventilation to the academic, interior teacher offices, and support areas • Wall- mounted fintube radiation located along the exterior wall between displacement diffusers • Gas -fired heating /direct expansion cooling roof mounted air handling unit with demand ventilation control serving the auditorium /gymnasium • Gas -fired heating /direct expansion cooling variable air volume roof mounted air handling unit with variable air volume diffusers serving the administration areas • Hot water coil heating /chilled water coil cooling indoor air handling unit with demand ventilation control serving the cafeteria • Hot water coil indoor heating and ventilating unit with demand ventilation control and split system dx cooling units serving the computer classrooms • Hot water coil heating /chilled water coil cooling indoor air handling unit with demand ventilation control serving the library • Limited use of fintube radiation, convectors, and unit heaters in entryways, corridors, and storage areas • Two -pipe hot water distribution system serving fan coil units, fintube radiation, hot water coils, and unit heaters • Two -pipe chilled water distribution system serving fan coil units and chilled water coils • (2) 1,200 MBH high- efficiency gas -fired condensing boiler power plant • 60 ton high- efficiency air - cooled chiller power plant • Chilled and hot water primary pumping with variable frequency drives • Direct digital controls throughout • Required architectural work for classrooms ductwork, structural supports, and acoustical screens for rooftop units Section 1.2: Mechanical Svstem Analvsis Conclusion The replacement in kind classroom unit ventilator system is selected as the baseline system since it results in the lowest installed cost system. Unfortunately, the selection may result in overall ownership costs that in some cases are higher as compared to the alterative systems primarily relating to the increased annual operating costs while also compromising the thermal comfort of the building. The option comparison of each alternative system to the baseline assesses the benefits of different systems with potentially reduced combined operating costs and improved thermal comfort with the goal of selecting the system with the highest ownership savings over the 25 year study period. Annual electrical and gas consumption is calculated thru the results of a thermal dynamic heat transfer analysis utilizing Department of Energy (DOE- 2) /eQuest software with all architectural data provided by Design Partnership of Cambridge Architects. Utility cost data for electricity and gas were obtained from published rate tables provided by the local electrical and gas providers. The "Building Life - Cycle" analysis included future worth of each system option considered using standard industry discount, inflation, and interest rates. Our observations of the Mechanical System Payback Summary suggest that option one, a classroom unit ventilator system with demand control ventilation, represents the most cost effective solution by yielding an approximate $77,424 savings over the 25 year study period with a 5 year payback. It should be noted that the baseline, option one, and option two are heat only systems (with the exception of the administration and computer room areas) and will not provide the thermal comfort conditions of options three and four. 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Recurring OM &R Costs Base Case Alternative $1,255,890 $1,280,490 $1,396,083 $1,294,059 $0 $0 $0 $0 $0 $0 $317,198 $317,198 End -of -Year Savings from Alternative - $24,600 $102,024 $0 $0 $0 $0 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Capital Replacements Residual Value at End of Study Period Subtotal (for Future Cost Items) Total PV Life -Cycle Cost Page 2 of 3 $0 $0 $0 $0 $0 $0 ------ - - - - -- ------ - - - - -- ------ - - - - -- $1,713,281 $1,611,257 $102,024 ------ - - - - -- ------ - - - - -- ------ - - - - -- $2,969,171 $2,891,747 $77,424 Net Savings from Alternative Compared with Base Case PV of Non - Investment Savings $102,024 - Increased Total Investment $24,600 Net Savings $77,424 Savings -to- Investment Ratio (SIR) SIR= 4.15 Adjusted Internal Rate of Return AIRR = 11.04% Payback Period Estimated Years to Payback (from beginning of Service Period) Simple Payback occurs in year 5 Discounted Payback occurs in year 5 Energy Savings Summary Energy Savings Summary (in stated units) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 296,210.0 kWh 295,810.0 kWh 400.0 kWh 9,998.6 kWh Natural Gas 22,294.0 Therm 18,113.0 Therm 4,181.0 Therm 104,510.7 Therm file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Energy Savings Summary (in MBtu) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 1,010.7 MBtu 1,009.3 MBtu 1.4 MBtu 34.1 MBtu Natural Gas 2,229.4 MBtu 1,811.3 MBtu 418.1 MBtu 10,451.1 MBtu Emissions Reduction Summary Energy Type Electricity CO2 SO2 NOx Natural Gas CO2 SO2 NOx Total: CO2 SO2 NOx - - -- Average Annual Base Case Alternative 225,061.78 kg 224,757.86 kg 379.65 kg 379.14 kg 318.88 kg 318.45 kg 117,764.80 kg 95,679.27 kg 950.40 kg 772.16 kg 1 6.47 kg 13.38 kg 342,826.58 kg 320,437.14 kg 1,330.05 kg 1,151.30 kg 335.35 kg 331.83 kg Emissions - - - -- Life -Cycle Reduction Reduction 303.92 kg 7,597.01 kg 0.51 kg 12.82 kg 0.43 kg 10.76 kg 22,085.52 kg 552,062.45 kg 178.24 kg 4,455.32 kg 3.09 kg 77.20 kg 22,389.44 kg 559,659.46 kg 178.75 kg 4,468.13 kg 3.52 kg 87.96 kg Page 3 of 3 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Pagel of 3 NIST BLCC 5.3 -08: Comparative Analysis Consistent with Federal Life Cycle Cost Methodology and Procedures, 10 CFR, Part 436, Subpart A Base Case: Baseline (Unit Ventilators) Alternative: Option 2 (Central Ventilation Unit w/ ERV) General Information File Name: Date of Study: Project Name: Project Location: Analysis Type: Analyst: Base Date: Service Date: Study Period: Discount Rate: Discounting Convention: C:AProgram Files (x86) \BLCC5 \projects \Bridge School.xml Tue Oct 19 15:09:38 GMT 2010 Bridge Elementary School Massachusetts FEMP Analysis, Energy Project Keith Lane January 1, 2010 January 1, 2010 25 years 0 months(January 1, 2010 through December 31, 2034) 4.9% Comparison of Present -Value Costs PV Life -Cycle Cost Initial Investment Costs: Capital Requirements as of Base Date Future Costs: Energy Consumption Costs Energy Demand Charges Energy Utility Rebates Water Costs Recurring and Non - Recurring OM &R Costs Base Case Alternative $1,255,890 $1,552,750 $1,396,083 $1,232,245 $0 $0 $0 $0 $0 $0 $317,198 $175,932 End -of -Year Savings from Alternative - $296,860 $163,838 $0 $0 $0 $141,266 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Capital Replacements Residual Value at End of Study Period Subtotal (for Future Cost Items) Total PV Life -Cycle Cost Page 2 of 3 $0 $0 $0 $0 $0 $0 ------ - - - - -- ------ - - - - -- ------ - - - - -- $1,713,281 $1,408,177 $305,104 ------ - - - - -- ------ - - - - -- ------ - - - - -- $2,969,171 $2,960,927 $8,244 Net Savings from Alternative Compared with Base Case PV of Non - Investment Savings $305,104 - Increased Total Investment $296,860 Net Savings $ 8,244 Savings -to- Investment Ratio (SIR) SIR = 1.03 Adjusted Internal Rate of Return AIRR = 5.01 % Payback Period Estimated Years to Payback (from beginning of Service Period) Simple Payback occurs in year 15 Discounted Payback occurs in year 25 Energy Savings Summary Energy Savings Summary (in stated units) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 296,210.0 kWh 292,810.0 kWh 3,400.0 kWh 84,988.4 kWh Natural Gas 22,294.0 Therm 15,911.0 Therm 6,383.0 Therm 159,553.2 Therm file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Energy Savings Summary (in MBtu) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 1,010.7 MBtu 999.1 MBtu 11.6 MBtu 290.0 MBtu Natural Gas 2,229.4 MBtu 1,591.1 MBtu 638.3 MBtu 15,955.4 MBtu Emissions Reduction Summary Energy Type Electricity CO2 SO2 NOx Natural Gas CO2 SO2 NOx Total: CO2 SO2 NOx - - -- Average Annual Emissions---- - Base Case Alternative Reduction 225,061.78 kg 222,478.45 kg 379.65 kg 375.30 kg 318.88 kg 315.22 kg 117,764.80 kg 84,047.53 kg 950.40 kg 678.29 kg 16.47 kg 11.75 kg 342,826.58 kg 306,525.98 kg 1,330.05 kg 1,053.59 kg 335.35 kg 326.98 kg 2,583.34 kg 4.36 kg 3.66 kg Life -Cycle Reduction 64,574.57 kg 108.93 kg 91.49 kg 33,717.26 kg 842,816.22 kg 272.11 kg 6,801.79 kg 4.71 kg 117.85 kg 36,300.60 kg 907,390.79 kg 276.47 kg 6,910.72 kg 8.38 kg 209.35 kg Page 3 of 3 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Pagel of 3 NIST BLCC 5.3 -08: Comparative Analysis Consistent with Federal Life Cycle Cost Methodology and Procedures, 10 CFR, Part 436, Subpart A Base Case: Baseline (Unit Ventilators) Alternative: Option 3 (Central Ventilation Unit w/ ERV & Cooling) General Information File Name: Date of Study: Project Name: Project Location: Analysis Type: Analyst: Base Date: Service Date: Study Period: Discount Rate: Discounting Convention: C:AProgram Files (x86) \BLCC5 \projects \Bridge School.xml Tue Oct 19 15:11:55 GMT 2010 Bridge Elementary School Massachusetts FEMP Analysis, Energy Project Keith Lane January 1, 2010 January 1, 2010 25 years 0 months(January 1, 2010 through December 31, 2034) 4.9% Comparison of Present -Value Costs PV Life -Cycle Cost Initial Investment Costs: Capital Requirements as of Base Date Future Costs: Energy Consumption Costs Energy Demand Charges Energy Utility Rebates Water Costs Recurring and Non - Recurring OM &R Base Case Alternative $1,255,890 $1,600,750 $1,396,083 $1,271,651 $0 $0 $0 $0 $0 $0 End -of -Year Savings from Alternative - $344,860 $124,432 $0 $0 $0 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Costs Capital Replacements Residual Value at End of Study Period Subtotal (for Future Cost Items) Total PV Life -Cycle Cost Page 2 of 3 $317,198 $175,932 $141,266 $0 $0 $0 $0 $0 $0 ------ - - - - -- ------ - - - - -- ------ - - - - -- $1,713,281 $1,447,583 $265,698 ------ - - - - -- ------ - - - - -- ------ - - - - -- $2,969,171 $3,048,333 - $79,162 Net Savings from Alternative Compared with Base Case PV of Non - Investment Savings $265,698 - Increased Total Investment $344,860 Net Savings - $79,162 Savings -to- Investment Ratio (SIR) SIR = 0.77 SIR is lower than 1.0; project alternative is not cost effective. Adjusted Internal Rate of Return AIRR = 3.81 % AIRR is lower than your discount rate; project alternative is not cost effective. Payback Period Estimated Years to Payback (from beginning of Service Period) Discounted Payback never reached during study period. Simple Payback occurs in year 19 Energy Savings Summary Energy Savings Summary (in stated units) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Type Base Case Alternative Savings Savings Electricity 296,210.0 kWh 308,750.0 kWh - 12,540.0 kWh - 313,457.1 kWh Natural Gas 22,294.0 Therm 15,630.0 Therm 6,664.0 Therm 166,577.2 Therm Energy Savings Summary (in MBtu) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 1,010.7 MBtu 1,053.5 MBtu -42.8 MBtu - 1,069.6 MBtu Natural Gas 2,229.4 MBtu 1,563.0 MBtu 666.4 MBtu 16,657.8 MBtu Emissions Reduction Summary Energy Type Electricity CO2 SO2 NOx Natural Gas CO2 SO2 NOx Total: CO2 SO2 NOx - - - -- Average Annual Base Case Alternative 225,061.78 kg 234,589.74 kg 379.65 kg 395.73 kg 318.88 kg 332.38 kg 117,764.80 kg 82,563.19 kg 950.40 kg 666.31 kg 16.47 kg 11.54 kg 342,826.58 kg 317,152.93 kg 1,330.05 kg 1,062.04 kg 335.35 kg 343.93 kg Emissions - - - -- Life -Cycle Reduction Reduction - 9,527.95 kg - 238,166.20 kg -16.07 kg - 401.76 kg -13.50 kg - 337.45 kg 35,201.61 kg 879,919.67 kg 284.09 kg 7,101.23 kg 4.92 kg 123.04 kg 25,673.65 kg 641,753.47 kg 268.02 kg 6,699.47 kg -8.58 kg - 214.41 kg Page 3 of 3 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/19/2010 BLCC Report Pagel of 3 NIST BLCC 5.3 -08: Comparative Analysis Consistent with Federal Life Cycle Cost Methodology and Procedures, 10 CFR, Part 436, Subpart A Base Case: Baseline (Unit Ventilators) Alternative: Option 4 (Fan Coil Units) General Information File Name: Date of Study: Project Name: Project Location: Analysis Type: Analyst: Base Date: Service Date: Study Period: Discount Rate: Discounting Convention: C:AProgram Files (x86) \BLCC5 \projects \Bridge School.xml Thu Oct 21 14:58:18 GMT 2010 Bridge Elementary School Massachusetts FEMP Analysis, Energy Project Keith Lane January 1, 2010 January 1, 2010 25 years 0 months(January 1, 2010 through December 31, 2034) 4.9% Comparison of Present -Value Costs PV Life -Cycle Cost Initial Investment Costs: Capital Requirements as of Base Date Future Costs: Energy Consumption Costs Energy Demand Charges Energy Utility Rebates Water Costs Recurring and Non - Recurring OM &R Costs Base Case Alternative $1,255,890 $2,126,100 $1,396,083 $1,434,988 $0 $0 $0 $0 $0 $0 $317,198 $432,463 End -of -Year Savings from Alternative - $870,210 - $38,905 $0 $0 $0 - $115,266 file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/21/2010 BLCC Report Capital Replacements Residual Value at End of Study Period Subtotal (for Future Cost Items) Total PV Life -Cycle Cost Page 2 of 3 $0 $0 $0 $0 $0 $0 ------ - - - - -- ------ - - - - -- ------ - - - - -- $1,713,281 $1,867,451 - $154,171 ------ - - - - -- ------ - - - - -- ------ - - - - -- $2,969,171 $3,993,551 - $1,024,381 Net Savings from Alternative Compared with Base Case PV of Non - Investment Savings - $154,171 - Increased Total Investment $870,210 Net Savings - $1,024,381 NOTE: Meaningful SIR, AIRR and Payback can not be computed unless incremental savings and total savings are both positive. Energy Savings Summary Energy Savings Summary (in stated units) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 296,210.0 kWh 358,820.0 kWh - 62,610.0 kWh - 1,565,035.7 kWh Natural Gas 22,294.0 Therm 16,387.0 Therm 5,907.0 Therm 147,654.8 Therm Energy Savings Summary (in MBtu) Energy - - - -- Average Annual Consumption - - - -- Life -Cycle Type Base Case Alternative Savings Savings Electricity 1,010.7 MBtu 1,224.3 MBtu -213.6 MBtu - 5,340.1 MBtu Natural Gas 2,229.4 MBtu 1,638.7 MBtu 590.7 MBtu 14,765.5 MBtu Emissions Reduction Summary Energy - - - -- Average Annual Emissions - - - -- Life -Cycle Type Base Case Alternative Reduction Reduction file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/21/2010 BLCC Report Page 3 of 3 Electricity CO2 225,061.78 kg 272,633.16 kg - 47,571.38 kg - 1,189,121.68 kg SO2 379.65 kg 459.90 kg -80.25 kg - 2,005.92 kg NOx 318.88 kg 386.29 kg -67.40 kg - 1,684.84 kg Natural Gas CO2 117,764.80 kg 86,561.93 kg 31,202.86 kg 779,964.81 kg SO2 950.40 kg 698.58 kg 251.82 kg 6,294.56 kg NOx 16.47 kg 12.10 kg 4.36 kg 109.06 kg Total: CO2 342,826.58 kg 359,195.09 kg - 16,368.52 kg - 409,156.86 kg SO2 1,330.05 kg 1,158.48 kg 171.57 kg 4,288.65 kg NOx 335.35 kg 398.39 kg -63.04 kg - 1,575.77 kg file: / /W:AClients \Clients \Design Partnership of Cambridge - 470 \009 Bridge & Bowman ... 10/21/2010 COST ESTIMATES imm P I* GALUSKA DESOUSA PROJECT: Bridge School Consulting Engineers Inc. JOB NO: 47000900 370 Faunce Corner Road, Dartmouth, MA 02747 -1217 Design Partnership of CLIENT: - Cambridge DATE: 10/18/2010 BY: KL Baseline - Unit Ventilator Sy stem ITEM OF WORK NO. UNIT PRICE AREA PRICE /S.F. TOTAL Unit Ventilators 37 $6,000 $222,000 RTU (Admin) 2,500 CFM 2,500 CFM $5.6 /CFM $14,000 HV (Library) 3,000 CFM 3,000 CFM $5 /CFM $15,000 HVAC System (Computer Rooms) 2,000 CFM 2,000 CFM $7.5 /CFM $15,000 HV (Cafeteria) 4,500 CFM 4,500 CFM $5 /CFM $22,500 HV (Auditorium /Gym) 9,500 CFM 9,500 CFM $5 /CFM $47,500 HV (Kitchen) 4,000 CFM 4,000 CFM $5 /CFM $20,000 (2) 2,000 MBH High- Efficiency Condensing Boilers including Breeching, Combustion Air, and Controls 2 $75,000 $150,000 Pumps (HHW) including VFD's 2 $5,500 $11,000 HHW Piping & Insulation including Fintube, Convectors, etc. 60,200 ftz $4 /ft2 $240,800 Ductwork including GRD's, Dampers, General Exhaust Systems, and Cleaning of Existing Duct (Majority of Existing Duct to Remain) 60,200 ft2 $2 /ft2 $120,400 Controls 60,200 ftz $5.5 /ft2 $331,100 Exhaust Fans (for UV ventilation) 14,800 CFM $3 /CFM $44,400 Clean Exhaust Duct $2,190 TOTAL $ 1,255,890 $ /S.F. $20.86 Cost estimates have been derived for system comparison purposes only. Estimates do not necessarily include HVAC systems and equipment that would typically be required for all system options studied; example: supplemental cooling systems for elevator machine rooms, tel /data rooms, etc. and radiation heating for unoccupied areas such as storage rooms, corridors, vestibules etc. Estimates do not include project general system costs; example: testing and balancing, commissioning, coordination, demolition, as built drawings etc. C R 1 , C LU ,# DESOUSA PROJECT: Bridge School Consulting Engineers Inc. JOB NO: 47000900 370 Faunce Corner Road, Dartmouth, MA 02747 -1217 Design Partnership of CLIENT: Option 1 - Unit Ventilator System Cambridge with Demand Control Ventilation DATE: 10/18/2010 BY: KL ITEM OF WORK NO. UNIT PRICE AREA PRICE /S.F. TOTAL Unit Ventilators 37 $6,000 $222,000 RTU (Admin) 2,500 CFM 2,500 CFM $5.6 /CFM $14,000 HV (Library) 3,000 CFM 3,000 CFM $5 /CFM $15,000 HVAC System (Computer Rooms) 2,000 CFM 2,000 CFM $7.5 /CFM $15,000 HV (Cafeteria) 4,500 CFM 4,500 CFM $5 /CFM $22,500 HV (Auditorium /Gym) 9,500 CFM 9,500 CFM $5 /CFM $47,500 HV (Kitchen) 4,000 CFM 4,000 CFM $5 /CFM $20,000 (2) 2,000 MBH High- Efficiency Condensing Boilers including Breeching, Combustion Air, and Controls 2 $75,000 $150,000 Pumps (HHW) including VFD's 2 $5,500 $11,000 HHW Piping & Insulation including Fintube, Convectors, etc. 60,200 ft2 $4 /ft2 $240,800 Ductwork including GRD's, Dampers, General Exhaust Systems, and Cleaning of Existing Duct (Majority of Existing Duct to Remain) 60,200 ft2 $2 /ft2 $120,400 Controls 60,200 ft2 $5.5 /f? $331,100 Exhaust Fans (for UV ventilation) 14,800 CFM $3 /CFM $44,400 Clean Exhaust Duct $2,190 Demand Ventilation Controls 41 $600 $24,600 TOTAL $ 1,280,490 $ /S.F. $21.27 Cost estimates have been derived for system comparison purposes only. Estimates do not necessarily include HVAC systems and equipment that would typically be required for all system options studied; example: supplemental cooling systems for elevator machine rooms, tel /data rooms, etc. and radiation heating for unoccupied areas such as storage rooms, corridors, vestibules etc. Estimates do not include project general system costs; example: testing and balancing, commissioning, coordination, demolition, as built drawings etc. GAR CIA - GALUSKA DESOUSA PROJECT: Bridge School Consulting Engineers Inc. JOB NO: 47000900 370 Faunce Comer Road, Dartmouth, MA 02747 -1217 CLIENT: Design Partnership of Option 2 - Central Ventilation Unit Cambridge with Energy Recovery Wheel DATE: 10/18/2010 BY: KL ITEM OF WORK NO. UNIT PRICE AREA PRICE /S.F. TOTAL DOAS w/ ERV (Classrooms) (2) 6,000 CFM (Heat Only) 12,000 CFM $7 /CFM $84,000 VAV Diffusers 11 $500 $5,500 VAV RTU (Admin) 2,500 CFM 2,500 CFM $6 /CFM $15,000 HV (Library) 3,000 CFM 3,000 CFM $5 /CFM $15,000 HVAC System (Computer Rooms) 2,000 CFM 2,000 CFM $7.5 /CFM $15,000 HV (Cafeteria) 4,500 CFM 4,500 CFM $5 /CFM $22,500 HV (Auditorium /Gym) 9,500 CFM 9,500 CFM $4.5 /CFM $42,750 HV (Kitchen) 4,000 CFM 4,000 CFM $5 /CFM $20,000 (2) 1,200 MBH High- Efficiency Condensing Boilers including Breeching, Combustion Air, and Controls 2 $60,0001 $120,000 Pumps (HHW) including VFD's 2 $5,500 $11,000 HHW Piping & Insulation including Fintube, Convectors, etc. 60,200 ftz $4 /ftz $240,800 Ductwork including GRD's, Dampers, & General Exhaust Systems 60,200 ftz $8.5 /ft2 $511,700 Controls 60,200 ftz $5.5 /ft2 $331,100 Demand Ventilation Controls 4 $6001 $2,400 Structural Work for New RTU's $40,000 Architectural Work for Ductwork (Soffits and Chases) $36,000 Roof Screening for New RTU's $40,000 TOTAL $1,552,750 $ /S.F. $25.79 Cost estimates have been derived for system comparison purposes only. Estimates do not necessarily include HVAC systems and equipment that would typically be required for all system options studied; example: supplemental cooling systems for elevator machine rooms, tel /data rooms, etc. and radiation heating for unoccupied areas such as storage rooms, corridors, vestibules etc. Estimates do not include project general system costs; example: testing and balancing, commissioning, coordination, demolition, as built drawings etc. GAR CIA - GALUSKA DESOUSA PROJECT: Bridge School Consulting Engineers Inc. JOB NO: 47000900 370 Faunce Comer Road, Dartmouth, MA 02747 -1217 CLIENT: Design Partnership of Cambridge Option 3 - Central Ventilation Unit with ]Energy Recovery Wheel and Partial Cooling DATE: 70/78/2070 BY: KL ITEM OF WORK NO. UNIT PRICE AREA PRICE /S.F. TOTAL DOAS w/ ERV (Classrooms) (2) 6,000 CFM 12,000 CFM $11 /CFM $132,000 VAV Diffusers 11 $500 $5,500 VAV RTU (Admin) 2,500 CFM 2,500 CFM $6 /CFM $15,000 HV (Library) 3,000 CFM 3,000 CFM $5 /CFM $15,000 HVAC System (Computer Rooms) 2,000 CFM 2,000 CFM $7.5 /CFM $15,000 HV (Cafeteria) 4,500 CFM 4,500 CFM $5 /CFM $22,500 HV (Auditorium /Gym) 9,500 CFM 9,500 CFM $4.5 /CFM $42,750 HV (Kitchen) 4,000 CFM 4,000 CFM $5 /CFM $20,000 (2) 1,200 MBH High- Efficiency Condensing Boilers including Breeching, Combustion Air, and Controls 2 $60,0001 $120,000 Pumps (HHW) including VFD's 2 $5,500 $11,000 HHW Piping & Insulation including Fintube, Convectors, etc. 60,200 ftz $4 /ftz $240,800 Ductwork including GRD's, Dampers, & General Exhaust Systems 60,200 ftz $8.5 /ft2 $511,700 Controls 60,200 ftz $5.5 /ft2 $331,100 Demand Ventilation Controls 4 $6001 $2,400 Structural Work for New RTU's $40,000 Architectural Work for Ductwork (Soffits and Chases) $36,000 Roof Screening for New RTU's $40,000 TOTAL $1,600,750 $ /S.F. $26.59 Cost estimates have been derived for system comparison purposes only. Estimates do not necessarily include HVAC systems and equipment that would typically be required for all system options studied; example: supplemental cooling systems for elevator machine rooms, tel /data rooms, etc. and radiation heating for unoccupied areas such as storage rooms, corridors, vestibules etc. Estimates do not include project general system costs; example: testing and balancing, commissioning, coordination, demolition, as built drawings etc. CAR IA a GALUSKA 9 DESOU A PROJECT: Bridge School Consulting Engineers Inc. JOB NO: 47000900 - 370 Faunce Corner Road, Dartmouth, MA 02747 -1217 CLIENT: Design Partnership of Option 4 Central Ventilation Unit - with Cambridge Energy Recovery Wheel and Full Air Conditionin DATE: 10/18/2010 BY: KL ITEM OF WORK NO. UNIT PRICE AREA PRICE /S.F. TOTAL DOAS w/ ERV (Classrooms) (2) 6,000 CFM 12,000 CFM $11 /CFM $132,000 Fan Coils 74 $3,000 $222,000 VAV Diffusers 11 $500 $5,500 VAV RTU (Admin) 2,500 CFM 2,500 CFM $6CFM $15,000 Indoor AC Air Handling Unit (Library) 3,000 CFM 3,000 CFM $6 /CFM $18,000 HVAC System (Computer Rooms) 2,000 CFM 2,000 CFM $7.5 /CFM $15,000 Indoor AC Air Handling Unit (Cafeteria) 4,500 CFM 4,500 CFM $6 /CFM $27,000 RTU (Auditorium /Gym) 9,500 CFM 9,500 CFM $6 /CFM $57,000 HV (Kitchen) 4,000 CFM 4,000 CFM $5 /CFM $20,000 (2) 1,200 MBH High- Efficiency Condensing Boilers including Breeching, Combustion Air, and Controls 2 $60,000 $120,000 60 Ton Air - Cooled Chiller 60 tons $1,250 ton $75,000 Pumps (CHW & HHW) including VFD's 4 $5,500 $22,000 HHW Piping & Insulation including Fintube, Convectors, etc. 60,200 ft2 $3 /ft2 $180,600 CHW Piping, Insulation, Condensate, and Accessories 60,200 ft2 $3 /ft2 $180,600 Ductwork including GRD's, Dampers, & General Exhaust Systems 60,200 ft2 $9.5/ft2 $571,900 Controls 60,200 ft2 $5.5/ft2 $331,100 Demand Ventilation Controls 4 $600 $2,400 Structural Work for New RTU's and Chiller $45,000 Architectural Work for Ductwork (Soffits and Chases) $36,000 Roof Screening for New RTU's and Chiller $50,000 TOTAL $ 2,126,100 $ /S.F. $35.32 Cost estimates have been derived for system comparison purposes only. Estimates do not necessarily include HVAC systems and equipment that would typically be required for all system options studied; example: supplemental cooling systems for elevator machine rooms, tel /data rooms, etc. and radiation heating for unoccupied areas such as storage rooms, corridors, vestibules etc. Estimates do not include project general system costs; example: testing and balancing, commissioning, coordination, demolition, as built drawings etc. ENERGY PROFILES Project /Run: Bridge Elementary School - Baseline (Unit Ventilators) - Baseline Design Run Date/Time: 10/08/10 @ 21:20 (x000) 40 30 20 10 Electric Consumption (kWh) Gas Consumption (Btu) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec (x000,000) 500 400 300 200 100 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. BE Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Consumption (kWh x000) San Feb Mar Apr May Sun Sul Aug Sep Oct Nov Dec Total Space Cool 0.00 0.00 0.00 0.02 0.17 0.48 0.46 0.35 0.33 0.06 0.01 0.00 1.88 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 6.34 6.96 5.96 5.98 6.70 6.22 5.06 5.26 6.51 6.67 7.03 4.07 72.78 Pumps & Aux, 1.40 1,33 1.36 1.29 1.12 1.01 1.04 1.04 1.02 1.16 1.34 1.27 14.38 Ext. Usage - - - - - - - - - - Task Lights - - - - Gas Consumption (Btu x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 326.9 353.4 267.9 157.2 65.6 11.1 1.9 2.2 24.6 89.2 210.5 189.1 1,,699.5 HP Supp. - - - - - - - - - - - - - Vent. Fans Pumps & Aux. ' - - - - - - - - - Ext. Usage - - - - - - - - - - - - - Misc. Equip. 20.5 243 20.5 21.7 25.6 118 1.8 1.8 20.8 28.6 25.5 11.6 213.8 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Baseline (Unit Ventilators) - Baseline Design Run Date/Time: 10/08/10 @ 21:20 Annual Energy Consumption by Enduse Space Cool 1.88 - Heat Reject. - - - - Refrigeration - - Space Heat 1.95 1,699.5' - - HP Supp. - - - Hot Water - 316.4' - - Vent. Fans 72.78 5% 15% Electricity 14% 76% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Ext. Usage - - - Misc. Equip. 45.72 213.5' - - Task Lights - - Area Lights 159.50 - Total 296.21 2,229.4' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans 01 Space Heating Space Cooling 5% 15% Electricity 14% 76% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Baseline (Unit Ventilators) - Baseline Design Run Date/Time: 10/08/10 @ 21:20 (X000) 12 11 10 9 8 rFA 6 5 4 3 2 1 0 Monthly Utility Bills ($) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Custom Elec Rate (annual bill: $ 53,317) IN Custom Gas Rate (annual bill: $ 32,326) Total Annual Bill Across All Rates: $ 85,643 eQUEST 3.63.6510 Monthly Utility Bills -All Rates Page 1 Project /Run: Bridge Elementary School - Baseline (Unit Ventilators) - Baseline Design Run Date/Time: 10/08/10 @ 21:20 Electric Demand (M) Gas Demand (Btu /h) 150 T ., mI 1 1 1 1 1 50 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec (x000,000) 4 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. IN Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Demand (kW) Tan Feb Mar Apr May Sun aul Aug Sep Oct Nov Dec Total Space Cool 1.3 3.3 5.6 5.1 4.2 5.9 25.4 Heat ,Reject. - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 399.5 Pumps &Aux. 3.3 3.4 3.4 29 1.4 1.4 1.4 1.4 IA 3.2 33 3.3 29.8 Ext. Usage - - - - - - - Task Lights - - - - Gas Demand (Btu /h x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 3.04 3.23 2.87 1.89 0.84 0.43 0.23 0.25 0.76 1.46 2.45 2.36 19.82 HP Supp. - - - - - - - - - - - - - Vent. Fans Pumps & Aux. ' - - - - - - - - - Ext. Usage - - - - - - - - - - - - - Misc. Equip. 0.00 0.00 0.00 0.00 0.37 0.37 0.01 0.00 0.00 0.40 0.00 0.00 0.79 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Baseline (Unit Ventilators) - Baseline Design Run Date/Time: 10/08/10 @ 21:20 Annual Peak Demand by Enduse Space Cool 5.60 - Heat Reject. - - - - Refrigeration - - Space Heat - 3,231.5' - - HP Supp. - - - Hot Water - 80.0' - - Vent. Fans 33.29 15% Electricity Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Ext. Usage - - - Misc. Equip. 18.67 3.7' - - Task Lights - - Area Lights 65.74 - Total 124.69 3,315.3' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection El Misc. Equipment ❑ Ventilation Fans 01 Space Heating Space Cooling 15% Electricity Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 1 (Unit Ventilators DCV) - Baseline Design Run Date/Time: 10/09/10 @ 07:03 (x000) 40 30 20 10 Electric Consumption (kWh) Gas Consumption (Btu) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec (x000,000) 400 300 200 100 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. BE Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Consumption (kWh x000) San Feb Mar Apr May Sun Sul Aug Sep Oct Nov Dec Total Space Cool 0.00 0.00 0.00 0.02 0.17 0.48 0.46 0.35 0.33 0.06 0.01 0.00 1.88 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 6.34 6.96 5.96 5.98 6.70 6.22 5.06 5.26 6.51 6.67 7.03 4.07 72.78 Pumps &Aux. 1.39 1.31 1.35 1.24 1.09 1.00 1.04 1.04 1.01 1.12 1.30 1.26 14.16 Ext. Usage - - - - - - - - Task Lights - - - - Gas Consumption (Btu x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 260.6 270.3 203.9 115.3 42.4 5.5 0.6 0.8 11.2 58.5 153.8 158.6 1,,281.5 HP Supp. - - - - - - - - - - - - - Vent. Fans Pumps & Aux. ' - - - - - - - - - Ext. Usage - - - - - - - - - - - - - Misc. Equip. 20.5 243 20.5 21.7 25.6 118 1.8 1.8 20.8 25.6 25.5 11.6 213.5 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 1 (Unit Ventilators DCV) - Baseline Design Run Date/Time: 10/09/10 @ 07:03 Annual Energy Consumption by Enduse Space Cool 1.88 - Heat Reject. - - - - Refrigeration - - Space Heat 1.78 1,281.5' - - HP Supp. - - - Hot Water - 316.4' - - Vent. Fans 72.78 5% 15% Electricity 12% 1 70/ 71% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Ext. Usage - - - Misc. Equip. 45.72 213.5' - - Task Lights - - Area Lights 159.50 - Total 295.81 1,811.3' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans In Space Heating Space Cooling 5% 15% Electricity 12% 1 70/ 71% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 1 (Unit Ventilators DCV) - Baseline Design Run Date/Time: 10/09/10 @ 07:03 (X000) 11 10 9 8 7 6 5 4 3 2 1 0 Monthly Utility Bills ($) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Custom Elec Rate (annual bill: $ 53,247) IN Custom Gas Rate (annual bill: $ 26,264) Total Annual Bill Across All Rates: $ 79,511 eQUEST 3.63.6510 Monthly Utility Bills -All Rates Page 1 Project /Run: Bridge Elementary School - Option 1 (Unit Ventilators DCV) - Baseline Design Run Date/Time: 10/09/10 @ 07:03 150 T ., Electric Demand (M) Gas Demand (Btu /h) (x000,000) 3.0 50 1.0 0 0.0 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. IN Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Demand (kW) San Feb Mar Apr May Sun Sul Aug Sep Oct Nov Dec Total Space Cool 3.3 5.6 5.1 4.2 5.9 24.1 Heat ,Reject. - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 33.3 399.5 Pumps &Aux. 3.3 33 3.3 3.3 1.4 1.4 1.4 1.4 IA 3.2 33 3.3 29.9 Ext. Usage - - - - - - - - Task Lights - - - - Gas Demand (Btu /h x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 1.94 2.13 1.96 0.98 0.64 0.33 0.04 0.03 0.32 0.76 1.48 1.67 12.28 HP Supp. - - - - - - - - - - - - - Vent. Fans Pumps & Aux. ' - - - - - - - - - Ext. Usage - - - - - - - - - - - - - Misc. Equip. 0.28 0.28 0.28 0.28 0.37 0.37 0.01 0.02 0.28 0.28 0.28 0.28 2.99 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 1 (Unit Ventilators DCV) - Baseline Design Run Date/Time: 10/09/10 @ 07:03 Annual Peak Demand by Enduse Space Cool 5.60 - Heat Reject. - - - - Refrigeration - - Space Heat - 2,132.4' - - HP Supp. - - - Hot Water - 161.3' - - Vent. Fans 33.29 15% Electricity 6% 83% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Ext. Usage - - - Misc. Equip. 18.67 276.2' - - Task Lights - - Area Lights 65.74 - Total 124.69 2,569.9' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection El Misc. Equipment ❑ Ventilation Fans 01 Space Heating Space Cooling 15% Electricity 6% 83% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 2 (Central ERV) - Baseline Design Run Date/Time: 10/09/10 @ 11:20 Electric Consumption (kWh) Gas Consumption (Btu) (x000) 40 77 7777 30 09 200 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. IN Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Consumption (kWh x000) Tan Feb Mar Apr May Sun aul Aug Sep Oct Nov Dec Total Space Cool 0.38 0.50 0.57 0.40 0.53 0.80 0.62 0.52 0.64 0.42 0.63 0.34 6.35 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 5.87 6.87 5.84 6.13 6.95 6.02 4.91 5.09 6.59 7.07 7.20 3.42 71.96 Pumps &Aux, 0.73 0,70 0.72 0.71 0.71 0.60 0.62 0.61 0.65 0.74 0.74 0.67 8.18 Ext. Usage - - - - - - - - - Task Lights - - - - Gas Consumption (Btu x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 210.3 221.4 167.3 97.3 37.0 5.2 0.6 0.8 10.4 50.9 127.6 125.1 1,;053.8 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux.' 0.6 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 7.0 Ext. Usage - - - - - - - - - - - - - Misc. Equip. 20.5 243 20.5 21.7 25.6 118 1.8 1.8 20.8 25.6 25.5 11.6 213.5 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 2 (Central ERV) - Baseline Design Run Date/Time: 10/09/10 @ 11:20 Annual Energy Consumption by Enduse Space Cool 6.35 - Heat Reject. - - - - Refrigeration - - Space Heat 1.10 1,053.8' - - HP Supp. - - - Hot Water - 316.8' - - Vent. Fans 71.96 Electricity 13% 66" /6 Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Ext. Usage - - - Misc. Equip. 45.72 213.5' - - Task Lights - - Area Lights 159.50 - Total 292.81 ' 1,591.1' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans In Space Heating Space Cooling Electricity 13% 66" /6 Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 2 (Central ERV) - Baseline Design Run Date/Time: 10/09/10 @ 11:20 (X000) 10 9 8 7 6 5 4 3 2 1 0 San Monthly Utility Bills ($) Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Custom Elec Rate (annual bill: $ 52,705) IN Custom Gas Rate (annual bill: $ 23,071) Total Annual Bill Across All Rates: $ 75,776 eQUEST 3.63.6510 Monthly Utility Bills -All Rates Page 1 Project /Run: Bridge Elementary School - Option 2 (Central ERV) - Baseline Design Run Date/Time: 10/09/10 @ 11:20 150 100 50 Electric Demand (M) Gas Demand (Btu /h) Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec (x000,000) 2.5 2.0 1.5 1.0 0.5 0.0 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. BE Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Demand (kW) San Feb Mar Apr May Sun Sul Aug Sep Oct Nov Dec Total Space Cool 1.3 1.3 1.4 1.7 3.2 2.9 4.0 3.5 3.0 2.8 2.4 1.8 29.2 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 35.3 35.3 35.3 35.3 35.3 35.3 35.4 35.3 35.3 35.3 35.3 35.3 423.8 Pumps &Aux. 1.8 1.8 1.8 1,8 1.7 13 1.7 13 13 1.7 13 13 20.6 Ext. Usage - - - - - - - Task Lights - - - - Gas Demand (Btu /h x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 1.49 1.66 1.54 0.72 0.55 0.30 0.04 0.03 0.30 0.64 1.19 1.30 9.76 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01' Ext. Usage - - - - - - - - - - - - - Misc. Equip. 0.28 0.28 0.28 0.37 0.37 0.37 0.01 0.02 0.28 0.28 0.28 0.28 3.08 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 2 (Central ERV) - Baseline Design Run Date/Time: 10/09/10 @ 11:20 Annual Peak Demand by Enduse Space Cool 3.16 - Heat Reject. - - - - Refrigeration - - Space Heat - 1,655.1' - - HP Supp. - - - Hot Water - 161.7' - - Vent. Fans 35.32 15% Electricity 13 °/n 8% 79% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Ext. Usage - - - Misc. Equip. 18.67 276.2' - - Task Lights - - Area Lights 65.74 - Total 124.57 2,093.8' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection El Misc. Equipment ❑ Ventilation Fans 01 Space Heating Space Cooling 15% Electricity 13 °/n 8% 79% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 3 (Central ERV with Cooling) - Baseline Design Run Date/Time: 10/09/10 @ 11:03 (x000) 40 30 Electric Consumption (kWh) Gas Consumption (Btu) 09 200 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. IN Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Consumption (kWh x000) Tan Feb Mar Apr May Sun aul Aug Sep Oct Nov Dec Total Space Cool 0.88 0.99 1.03 0.73 1.77 2.66 2.09 1.39 2.53 1.11 0.97 0.70 16.85 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 6.91 7.63 6.79 6.68 6.87 6.04 4.99 5.20 6.51 6.89 7.80 4.62 76.93 Pumps &Aux, 0.77 0,74 0.76 0.74 0.74 0.64 0.66 0.66 0.68 0.75 0.77 0.70 8.60 Ext. Usage - - - - - - - - Task Lights - - - - Gas Consumption (Btu x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 204.5 213.7 162.2 94.6 36.7 5.3 0.6 0.8 10.5 50.2 122.9 123.4 1,;025.2 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux.' 0.6 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 7.0 Ext. Usage - - - - - - - - - - - - - Misc. Equip. 20.5 243 20.5 21.7 25.6 118 1.8 1.8 20.8 28.6 25.5 11.6 213.8 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 3 (Central ERV with Cooling) - Baseline Design Run Date/Time: 10/09/10 @ 11:03 Annual Energy Consumption by Enduse Space Cool 16.85 - Heat Reject. - - - - Refrigeration - - Space Heat 1.15 1,025.2' - - HP Supp. - - - Hot Water - 317.2' - - Vent. Fans 76.93 3% 15% Electricity 14% 66" /6 Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Ext. Usage - - - Misc. Equip. 45.72 213.5' - - Task Lights - - Area Lights 159.50 - Total 308.75 1,563.0' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans In Space Heating Space Cooling 3% 15% Electricity 14% 66" /6 Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 3 (Central ERV with Cooling) - Baseline Design Run Date/Time: 10/09/10 @ 11:03 (X000) 10 9 8 7 6 5 4 3 2 1 0 San Monthly Utility Bills ($) Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Custom Elec Rate (annual bill: $ 55,575) IN Custom Gas Rate (annual bill: $ 22,663) Total Annual Bill Across All Rates: $ 78,238 eQUEST 3.63.6510 Monthly Utility Bills -All Rates Page 1 Project /Run: Bridge Elementary School - Option 3 (Central ERV with Cooling) - Baseline Design Run Date/Time: 10/09/10 @ 11:03 Electric Demand (M) Gas Demand (Btu /h) 150 T ., mI 1 1 1 1 1 (x000,000) 2.5 2.0 1.5 0 0.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. IN Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Demand (kW) San Feb Mar Apr May Sun Sul Aug Sep Oct Nov Dec Total Space Cool 2.3 2.7 3.1 4.6 19.0 24.4 22.7 21.3 19.3 13.7 6.1 3.3 142.4 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 34.4 34.4 34.4 34.4 33.9 33.7 33.7 33.9 33.8 33.9 34.4 34.4 409.0 Pumps &Aux. 1.8 1.8 1.8 1,8 1.7 13 1.7 13 13 1.7 13 13 20.7 Ext. Usage - - - - - - - Task Lights - - - - Gas Demand (Btu /h x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 1.43 1.59 1.48 0.67 0.55 0.30 0.04 0.03 0.30 0.60 1.14 1.25 9.37 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01' Ext. Usage - - - - - - - - - - - - - Misc. Equip. 0.28 0.28 0.28 0.37 0.37 0.37 0.01 0.02 0.28 0.28 0.28 0.28 3.08 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 3 (Central ERV with Cooling) - Baseline Design Run Date/Time: 10/09/10 @ 11:03 Annual Peak Demand by Enduse Space Cool 24.35 - Heat Reject. - - - - Refrigeration - - Space Heat - 1,588.9' - - HP Supp. - - - Hot Water - 161.7' - - Vent. Fans 33.72 23% t, 13% Electricity 14% 8% 78% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Ext. Usage - - - Misc. Equip. 18.67 276.2' - - Task Lights - - Area Lights 65.74 - Total 144.17 2,027.7' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection El Misc. Equipment ❑ Ventilation Fans In Space Heating Space Cooling 23% t, 13% Electricity 14% 8% 78% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 4 (Fan Coil Units) - Baseline Design Run Date/Time: 10/09/10 @ 12:37 (x000) 40 30 20 10 Electric Consumption (kWh) Gas Consumption (Btu) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec 200 100 Jan Feb Mar Apr May3un Sul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. BE Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Consumption (kWh x000) Tan Feb Mar Apr May Sun aul Aug Sep Oct Nov Dec Total Space Cool 3.98 4.01 4.08 4.18 7.75 11.01 7.25 6.35 10.96 6.27 4.66 3.62 74.13 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 6.47 5.76 4.94 5.59 5.92 5.29 3.97 4.14 5.72 5.82 5.73 5.48 64.83 Pumps & Aux, 1.39 1,28 1.31 1.12 1.00 0.97 0.95 0.95 0.98 1.00 1.20 1.28 13.44 Ext. Usage - - - - - - - - - - Task Lights - - - - Gas Consumption (Btu x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 203.1 207.1 153.7 85.8 25.7 3.5 0.6 0.8 7.5 36.6 113.1 126.6 963.8 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux.' 0.6 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 7.0 Ext. Usage - - - - - - - - - - - - - Misc. Equip. 20.5 243 20.5 21.7 25.6 118 1.8 1.8 20.8 25.6 25.5 11,6 213.5 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 4 (Fan Coil Units) - Baseline Design Run Date/Time: 10/09/10 @ 12:37 Annual Energy Consumption by Enduse Space Cool 74.13 - Heat Reject. - - - - Refrigeration - - Space Heat 1.20 963.8' - - HP Supp. - - - Hot Water - 454.4' - - Vent. Fans 64.83 'q' 13% 18% 4% Electricity 13% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Ext. Usage - - - Misc. Equip. 45.72 213.5' - - Task Lights - - Area Lights 159.50 - Total 358.82 1,638.7' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans In Space Heating Space Cooling 'q' 13% 18% 4% Electricity 13% Natural Gas eQUEST 3.63.6510 Annual Energy Consumption by Enduse Page 1 Project /Run: Bridge Elementary School - Option 4 (Fan Coil Units) - Baseline Design Run Date/Time: 10/09/10 @ 12:37 (X000) 11 10 9 8 7 6 5 4 3 2 1 0 Monthly Utility Bills ($) Jan Feb Mar Apr May Jun Sul Aug Sep Oct Nov Dec Custom Elec Rate (annual bill: $ 64,588) IN Custom Gas Rate (annual bill: $ 23,761) Total Annual Bill Across All Rates: $ 88,349 eQUEST 3.63.6510 Monthly Utility Bills -All Rates Page 1 Project /Run: Bridge Elementary School - Option 4 (Fan Coil Units) - Baseline Design Run Date/Time: 10/09/10 @ 12:37 Electric Demand (M) Gas Demand (Btu /h) 250 200 nm��MIFAN iLfAim� 50� � 7 7 � Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec (x000,000) 2.5 2.0 1.5 1.0 0.5 0.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. BE Ht Pump Supp. 0 Heat Rejection Misc. Equipment ❑ Ventilation Fans NN Space Heating IN Space Cooling Electric Demand (kW) Tan Feb Mar Apr May Sun aul Aug Sep Oct Nov Dec Total Space Cool 16.3 20.8 22.6 44.8 86.5 128.2 66.0 57.8 120.2 65.3 53.1 21.2 702.6 Heat ,Reject. - - - - - - - - - - - - - Refriaeration HP Supp. Hot Water Vent. Fans 26.5 26.5 23.9 26.5 26.5 26.6 26.5 26.5 26.6 26.5 26.5 26.5 315.4 Pumps &Aux. 2.8 2.8 1.6 2,7 2.8 10 2.7 2,6 3.0 2.7 23 2,7 32.0 Ext. Usage - - - - - - - Task Lights - - - - Gas Demand (Btu /h x000,000) Space Cool Retrigeration - - - - - - - - - - - - - Space Heat 1.45 1.53 1.36 1.23 0.42 0.17 0.04 0.03 0.10 0.39 1.32 1.12 9.15 HP Supp. - - - - - - - - - - - - - Vent. Fans - - - - - - - - - - - - - Pumps &Aux. 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01' Ext. Usage - - - - - - - - - - - - - Misc. Equip. 0.28 0.28 0.28 0.00 0.37 0.37 0.01 0.02 0.37 0.37 0.03 0.28 2.66 Task Lights - - - - - - - - - eQUEST 3.63.6510 Monthly Peak Demand by Enduse Page 1 Project /Run: Bridge Elementary School - Option 4 (Fan Coil Units) - Baseline Design Run Date/Time: 10/09/10 @ 12:37 Annual Peak Demand by Enduse Space Cool 128.19 - Heat Reject. - - - - Refrigeration - - Space Heat - 1,527.9' - - HP Supp. - - - Hot Water - 231.2' - - Vent. Fans 26.55 27% Electricity 11 14% 11% 75% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1 Ext. Usage - - - Misc. Equip. 18.52 276.2' - - Task Lights - - Area Lights 65.25 - Total 241.48 2,036.1' - - El Area Lighting ❑ Exterior Usage ❑ Water Heating ❑ Refrigeration Task Lighting Pumps & Aux. in Ht Pump Supp. 0 Heat Rejection El Misc. Equipment ❑ Ventilation Fans 01 Space Heating Space Cooling 27% Electricity 11 14% 11% 75% Natural Gas eQUEST 3.63.6510 Annual Peak Demand by Enduse Page 1