That's true for air heat pumps, but many people (myself included) have ground water heat pump systems; either open- or closed-loop. My unit is fairly old (mid

That's true for air heat pumps, but many people (myself included) have ground water heat pump systems; either open- or closed-loop. My unit is fairly old (mid 1980 Tetco) and provide all of our heating and cooling. It uses the most electricity in January/February for heating and July/August for cooling, but my total electric bill is usually never more than $200/mo and that included all of the home's "normal" electricity use.