Fair enough, every AC system is a heat pump. But most of them are quite inefficient and require a lot of power to operate, though the last decade or two there have been some major improvements on this front.
The kind of heatpump that I have in mind will heat and cool depending on the season and uses in-ground loops with a fluid running through them.
Ah, so a heat pump designed to use geothermal or marine heat transfer. Yeah, those are more efficient. It's too bad they aren't more common, probably due to price, experienced installers, and smaller market (certain install requirements make urban areas less of a candidate). I'd love to have one.
The kind of heatpump that I have in mind will heat and cool depending on the season and uses in-ground loops with a fluid running through them.