Mini-split for winter heating
My family has an insulated vacation cabin that is used in he winter ( zone 6
A). Normally it is heated via wood stove. Would it be possible (and smart ) to maintain the temperature of the cabin a 40F to 50F when not in use using a mini split heat pump. If the set pt is 50F what would be an estimate of the COP at outside temperatures of 40F, 30, 20, 10, 0, -10.
The cabin requires 9000 btus/Hr with an inside temp of 70F and outside temp of 0F. Would a floor mounted inside exchanger be better than a ceiling mounted unit? Currently when not in use the cabin is unheated.