Quote:
Originally Posted by ishoot308
Just out of curiosity, with all the rage on heat pumps / mini split systems these days, has anyone done a cost comparison of adding a mini split as a supplemental heat source instead of a complete changeover?
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Of course, the outside unit would have to be kept clear of snow, so the air can circulate through it. For operating cost, take what you'd expect for straight electric heat and divide by the COP (coefficient of performance). The COP will be best, perhaps upward of 3, when outside temperatures aren't too cold, and worst as you go further below zero, dropping below 2. The vendor's tables may be available online and should give you performance vs outside air temperature.