[cptskippy]

> This just isn't accurate though, you're using a definition of heat pump that's personal rather than shared.

TBH, that is the definition of heat pump that I grew up with. When people say heat pumps, I immediately think of ground source heat pumps.

[samatman]

Well then, I take it back that it isn't a shared definition in that sense.

But it's a pity, because the air source ones are basically AC units which can also run backward to heat your home, and if more people knew that, they'd install them.