Speaking from the UK. We had 2 days of hot weather. A reasonably insulated house or one with decent thermal mass is fine. Heat pumps are more use here for the h

Speaking from the UK. We had 2 days of hot weather. A reasonably insulated house or one with decent thermal mass is fine. Heat pumps are more use here for the heat, we don't have extreme winters, so the basic premise of the article from a UK perspective is wrong. Plus the name 'heat pump' doesn't indicate a direction anyway.