In terms of efficiency, durability, environmental impact and overall performance, Geothermal Heat Pumps are far superior to Air Source Heat Pumps. Below are predicted annual averages for a heat pump in a typical Hudson Valley home.
Coefficient of Performance
Coefficient of Performance at 0oF
Energy Efficiency Ratio
Back Up Fuel Source
May be needed in cold weather climates
Ground Source Heat Pumps provide significantly larger energy savings as they are much more efficient at heating a home in the coldest winters, no matter what the air temperature drops to outside.
When it is 0°F outside, an Air Source Heat Pump will require about 3.6 times as much electricity as a Ground Source Heat Pump to deliver the same amount of heat. The air source heat pump will perform at 1.0 COP when the temperature drops below 0°F while the Ground Source Heat Pump will be able to maintain a 3.9 COP at 0°F.
Heating COP vs Outdoor Air Temperature