Valley residents with electric heat pumps can now boost efficiency with inverter technology
Are 'Heat Pumps' the Answer to Heat Waves? Some Cities Think So. - The New York Times
Heat pump - Wikipedia
12000 BTU Mini Split Ductless Air Conditioner – 18 SEER - Includes Free 15' Lineset and Wiring - Arrives 100% Ready to Install - Pre-Charged Inverter Compressor – 115V Heat Pump - USA Parts and Tech