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["Attic/Ceiling Insulation"]
["(Electric Cooling and Gas Heating)"]
[]
["Description of UCRM:",null,null,null,"(Data needed: age of building, floor area of building, number of floors)"]
[]
[]
[]
[]
[]
["Data needed for calculations",null,null,null,null,"Description",null,null,null,null,null,null,null,"Resource"]
["A)",null,null,"hr-ft2-°F/Btu",null,"Resistance (R-value) of Existing Ceiling",null,null,null,null,null,null,null,"Table 18"]
["B)",null,null,"hr-ft2-°F/Btu",null,"Resistance (R-value) with added insulation",null,null,null,null,null,null,null,"Table 18"]
["C)",null,null,"°F",null,"Average Outdoor Temperature - Summer",null,null,null,null,null,null,null,"Table 5"]
["D)",null,null,"°F",null,"Average Outdoor Temperature - Winter",null,null,null,null,null,null,null,"Table 5"]
["E)",null,null,"°F",null,"Summer Thermostat Setpoint"]
["F)",null,null,"°F",null,"Winter Thermostat Setpoint"]
["G)",null,null,"hrs/yr",null,"Annual Cooling System Operating Hours",null,null,null,null,null,null,null,"Table 15"]
["H)",null,null,"hrs/yr",null,"Annual Heating System Operating Hours",null,null,null,null,null,null,null,"Table 16"]
["I)",null,null,"ft2",null,"Area of Ceiling"]
["J)",null,null,"Btuh/Watt",null,"Performance of Cooling System",null,null,null,null,null,null,null,"Table 1"]
["K)",null,null,"%",null,"Heating System Efficiency",null,null,null,null,null,null,null,"Table 3"]
["L)",null,null,"$/kWh",null,"Electrical Energy Rate - Summer"]
["M)",null,null,"$/kWh",null,"Electrical Energy Rate - Winter"]
["N)",null,null,"$/kW",null,"Electrical Demand Rate - Summer"]
["O)",null,null,"$/kW",null,"Electrical Demand Rate - Winter"]
["P)",null,null,"$/Mcf",null,"Natural Gas Rate"]
["Q)",null,null,"$/ft2",null,"Installed Cost of Insulation per Square Foot"]
["R)",null,null,"°F",null,"Summer Attic Temperature Differential - 15°F"]
["S)",null,null,"°F",null,"Winter Attic Temperature Differential - 5°F"]
[]
["Calculations"]
["T)","Summer Attic Temperature",null,null,null,"=","C + R",null,null,null,"=",{"$f":"B13+B28","v":0},null,"ºF"]
[]
["U)","Winter Attic Temperature",null,null,null,"=","D + S",null,null,null,"=",{"$f":"B14+B29","v":0},null,"ºF"]
[]
["V)","Ceiling Load Coefficient Reduction",null,null,null,"=","(1 / A - 1 / B) * I",null,null,null,"=",{"$f":"(1/B11-1/B12)*B19","v":{"$error":"#DIV/0!"}},null,"Btu/hr-ºF"]
[]
["W)","Cooling Energy Savings",null,null,null,"=","V * (T - E) * G ",null,null,null,"=",{"$f":"L36*(L32-B15)*B17","v":{"$error":"#DIV/0!"}},null,"Btu/yr"]
[]
["X)","Heating Energy Savings",null,null,null,"=","V * (F - U) * H",null,null,null,"=",{"$f":"L36*(B16-L34)*B18","v":{"$error":"#DIV/0!"}},null,"Btu/yr"]
[]
["Y)","Annual Electrical Energy Savings",null,null,null,"=","W",null,null,null,"=",{"$f":"L38/(B20*1000)","v":{"$error":"#DIV/0!"}},null,"kWh/yr"]
[null,null,null,null,null,null,"J * 1,000 W/kW"]
["Z)","Cooling Electrical Demand Reduction",null,null,null,"=","Y",null,null,null,"=",{"$f":"L42/B17","v":{"$error":"#DIV/0!"}},null,"kW/yr"]
[null,null,null,null,null,null,"G"]
["AA)","Annual Natural Gas Savings",null,null,null,"=","X",null,null,null,"=",{"$f":"L40/((B21/100)*1030000)","v":{"$error":"#DIV/0!"}},null,"Mcf/yr"]
[null,null,null,null,null,null,"K * 1,030,000 Btu/Mcf"]
["BB)","Annual Cost Savings",null,null,null,"=","Y * (L + M)/2 + Z * (N + O)/2 + AA * P",null,null,null,"=",{"$f":"L42*(B22+B23)/2+L44*(B24+B25)/2+L46*B26","v":{"$error":"#DIV/0!"}},null,"$/yr"]
[]
["CC)","Implementation Cost",null,null,null,"=","Q * I",null,null,null,"=",{"$f":"B27*B19","v":0},null,"$"]
[]
["DD)","Simple Payback",null,null,null,"=","CC",null,null,null,"=",{"$f":"L50/L48","v":{"$error":"#DIV/0!"}},null,"yrs"]
[null,null,null,null,null,null,"BB"]

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