In very cold climates, you're better off with just burning fuel (natural gas is available in most of the U.S. very cheaply, although this is probably not the ca

In very cold climates, you're better off with just burning fuel (natural gas is available in most of the U.S. very cheaply, although this is probably not the case outside the U.S.). But it turns out that GSHPs have a lot of losses related to pumping and other inefficiencies to where the difference in efficiency between a state of the art inverter-driven ASHP and a GSHP really isn't that high. Especially considering the often HUGE upfront cost of installing a GSHP. Google for "Inverter Air Source Heat Pump vs Ground Source" or similar. For example, see: https://www.homepower.com/articles/solar-water-heating/domestic-hot-water/ask-experts-air-vs-ground-source-heat-pumps https://www.homepower.com/articles/solar-water-heating/domes...