Ductless Heat Pump
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Basics
- A heat pump - using air heat exchange - extracts heat or cold from the ambient air. There is an outside compressor, and indoor heat exchanger. A split unit. Install requires placing the heat pump outdoors, and placing one or more heat exchangers indoors.
Working Doc
Efficiency Vs Temperature
- This one says that it's not worthwhile below 30F [1]. How to reconcile with manufacturer claiming -13F?