Quote Originally Posted by Gofer Blue View Post
Wow, you have a fantastic set up there. MVHR + massive wall insulation + PV + TG + UFH...... ideal! Out of interest do you how many kWh you use p.a. per sq metre of house? There are very few houses in the U.K. that come anywhere near that kind of construction, hence ASHP not really viable for the majority.

Is it passive house (PH) standard? Not sure if they have PH over there though?
For 2023, it used 1,316 kWh and has a footprint of 105m2. I think that qualifies.

I don't think the passive house standard is actually well specified though. I think a better standard would use space/building volume. (My house has cathedral ceilings.)