On 2020-10-26, Brian Gaff (Sofa) wrote:
Noisy?
I would imagine if we go down the reversible heat pump route, then some
kind of air moving system is going to be needed again?
Brian

Out of fashion where? I understand that in Sweden they are the norm -
air ducts to take take warmed fresh air to each room and air ducts to
take exhaust from rooms. Air in and out are controlled with heat
exchanges and heat is recovered from the warm house exhaust air.