Plenty of brick houses here have heat pumps. This 1950s house is matchsticks and cardboard. It's got the insulative properties of wet shorts in a stiff winter breeze straight to the testies.

It has "aux heat" a very powerful resitive heater it'll use from time to time. Usually for about 10-20 mins a day. That costs significant money. The rest of the time it cost as much as an aircon to run. Which, coincidentally it also is for summer time.