Conventional heat pumps with mini-split low temp efficiency?
There seems to be quite a few options for extra high efficiency heat pumps when you go with mini-splits, but I am struggling to find conventional heat pumps that stand out. It will be connected to a standard ECM motor air handler, like a normal a/c unit would. The ducting is basically in the plans, so there is no going back now.
I understand there is a decent efficiency penalty to be paid when driving a large fan motor vs a mini-split head and low powered fan, but are there still some products that stand out, efficiency wise? I am considering a heat pump as my only source of heat for the first winter, so it would have to have decent efficiency (cop>1.0) down to -20decC or better (stretch goal -25degC).
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