The following is a table that illustrates the cost of different fuels and equipment types to produce the same amount of energy in your home (100,000 Btu’s).

Geothermal System with COP of 4.0 Lennox XP14 Air Source Heat Pump @ 47 degree Outdoor Temperature Lennox XP14 Air Source Heat Pump @ 32 degree Outdoor Temperature Lennox XP14 Air Source Heat Pump @ 17 degree Outdoor Temperature 98% Efficient Natural Gas Furnace 90% Efficient Natural Gas Furnace 80% Efficient Natural Gas Furnace 65% Efficient Natural Gas Furnace 87% Efficient Pellet Stove                                 82% Efficient Pellet Stove                                 Electric Heat 98% Efficient Propane Furnace 90% Efficient Propane Furnace 80% Efficient Propane Furnace 65% Efficient Propane Furnace		$0.51 $0.58 $0.70 $0.88 $0.81 $0.88 $0.99 $1.21 $1.46 $1.55 $2.05 $2.23 $2.43 $2.74 $3.37
Based on: Electricity $0.07/kwh Natural Gas $7.88/dk Propane $2.00/gallon Pellets $220/pallet (2000 lbs)