The chart below shows a comparison of annual home heating fuel costs based on the most recent infor-mation obtained from suppliers in Snohomish County. The chart also shows that electric heat pumps continue to provide a very cost-effective heating source. (Electric costs based on PUD residential billing rate of 10.4 cents per kilowatt-hour.)
The costs are based on the space heating needs for an average single family home. Individual consump-tions can vary significantly, depending on thermostat settings, air leakage, house construction, and other factors.
Electric Heat Pump
5888kWH
$612
7350kWH
$764
8825kWH
$918
Gas Furnace
667 therms
$1014
883 therms
$1266
1000 therms
$1520
Electric Baseboard
11730 kWH
$1220
14650 kWH
$1524
17575 kWH
$1828
Electric Furnace
14650 kWH
$1524
18313 kWH
$1905
21975 kWH
$2285
Propane Furnace
725 gallons
$1631
906 gallons
$2083
1087 gallons
$2446
Oil Furnace
480 gallons
$1445
600 gallons
$1806
719 gallons
$2164
- $300
- $600
- $900
- $1200
- $1500
- $1800
- $2100
- $2400
- $2700
System assumptions:
- Electric heat pump: HSPF 8.5, $0.104/kWh, 3413 Btu/kWh, 25% duct loss
- Gas Furnace: 80% efficiency, $1.52/therm, 100,000 Btu/therm, 25% duct loss
- Electric baseboard: 100% efficiency, $0.104/kWh, 3413 Btu/kWh • Propane furnace: 80% efficiency, $2.25/gallon, 92,000 Btu/gallon, 25% duct loss
- Electric furnace: 100% efficiency, $0.104/kWh, 3413 Btu/kWh, 25% duct loss
- Oil furnace: 80% efficiency, $3.01/gallon, 139,000 Btu/gallon, 25% duct loss
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