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["Attic/Ceiling Insulation"]
["(Electric Cooling and 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,"$/ft2",null,"Installed Cost of Insulation per Square Foot"]
["Q)",null,null,"°F",null,"Summer Attic Temperature Differential - 15°F"]
["R)",null,null,"°F",null,"Winter Attic Temperature Differential - 5°F"]
[]
["Calculations"]
["S)","Summer Attic Temperature",null,null,null,"=","C + Q",null,null,null,"=",{"$f":"B13+B27","v":0},null,"ºF"]
[]
["T)","Winter Attic Temperature",null,null,null,"=","D + R",null,null,null,"=",{"$f":"B14+B28","v":0},null,"ºF"]
[]
["U)","Ceiling Load Coefficient Reduction",null,null,null,"=","(1 / A - 1 / B) * I",null,null,null,"=",{"$f":"(1/B11-1/B12)*B19","v":{"$error":"#DIV/0!"}},null,"Btu/hr-ºF"]
[]
["V)","Cooling Energy Savings",null,null,null,"=","U * (S - E) * G",null,null,null,"=",{"$f":"L35*(L31-B15)*B17","v":{"$error":"#DIV/0!"}},null,"Btu/yr"]
[]
["W)","Heating Energy Savings",null,null,null,"=","U * (F - T) * H",null,null,null,"=",{"$f":"L35*(B16-L33)*B18","v":{"$error":"#DIV/0!"}},null,"Btu/yr"]
[]
["X)","Cooling Electrical Energy Savings",null,null,null,"=","V",null,null,null,"=",{"$f":"L37/(B20*1000)","v":{"$error":"#DIV/0!"}},null,"kWh/yr"]
[null,null,null,null,null,null,"J * 1,000 W/kW"]
["Y)","Heating Electrical Energy Savings",null,null,null,"=","W",null,null,null,"=",{"$f":"L39/(3413*(B21/100))","v":{"$error":"#DIV/0!"}},null,"kWh/yr"]
[null,null,null,null,null,null,"3,413 Btu/kWh * K"]
["Z)","Annual Electrical Energy Savings",null,null,null,"=","X + Y",null,null,null,"=",{"$f":"L41+L43","v":{"$error":"#DIV/0!"}},null,"kWh/yr"]
[]
["AA)","Annual Electrical Demand Savings",null,null,null,"=","Z",null,null,null,"=",{"$f":"L45/(B17+B18)","v":{"$error":"#DIV/0!"}},null,"kW/yr"]
[null,null,null,null,null,null,"G + H"]
["BB)","Annual Cost Savings",null,null,null,"=","Z * (L + M)/2 + AA * (N + O)/2",null,null,null,"=",{"$f":"L45*(B22+B23)/2+L47*(B24+B25)/2","v":{"$error":"#DIV/0!"}},null,"$/yr"]
[]
["CC)","Implementation Cost",null,null,null,"=","P * I",null,null,null,"=",{"$f":"B26*B19","v":0},null,"$"]
[]
["DD)","Simple Payback",null,null,null,"=","CC",null,null,null,"=",{"$f":"L51/L49","v":{"$error":"#DIV/0!"}},null,"yrs"]
[null,null,null,null,null,null,"BB"]

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