@Dirtfarmr@PaddyBriggs@moiracathleen@BorisJohnson@POTUS@polit2k@Sysparatem How small do you think our bins are if you think there's enough space there?
It's not just wallspace though, most homes also need new pipes & radiators for a ASHP, so that's floors up etc. Then the house needs to be extremely well insulated.
It's a complete non-starter for many