FEBRUARY 2007
HEAT INPUT INTO THE HOUSE = 300 THERMS X 90% EFFICIENCY = 270 THERMS USED TO OFFSET HEAT LOSS IN THE HOUSE.
COST OF GAS FOR ABOVE IS 300 THERMS X $1.03285/THERM = $309.85/MO.
DAIKIN VRV HEATING SYSTEM WITH A 2.866 COP AT 5.5 F OUTSIDE TEMPERATURE USES 7,911 KWH/2.866 = 2,760 KWH/MO.
COST OF ELECTRICITY = 2,760 KWH X $0.0575/KHW = $158.70/MO.
DAIKIN VRV HEATING COST IS 51% OF A 90% EFFICIENT GAS FURNACE, SAVING 49%.
NOTE: SAVINGS ARE LARGER WHEN IT IS WARMER THAN 5.5 F OUTSIDE AIR TEMPERATURE. COP USED IS AT 5.5 F.