|
Mark: that's basically what I've been told. Floor heat doesn't need hi-temp water or big delta-T, which keeps the efficiency up. Once you go for the radiators, heat pump efficiency goes down. So I plan to install floor heat in all room.
Gas would be nice but the infrastructure doesn't exist, so it's gonna be ground source HP all the way. I investigated air-to-air but it's noisy, doesn't work bellow -10C and it's hard to make work for closed rooms.
John: OK, thanks for the heads up. I have the heater unit installed but disabled in software. I have a 100L buffer-tank and right now (-7 deg C outside) HP runs once every 2 hours for like 15 minutes.
__________________
Thank you for your time,
|