Are ‘Heat Pumps’ the Answer to Heat Waves? Some Cities Think So. - The New York Times
https://www.nytimes.com/2021/06/30/climate/heat-pumps-climate.htmlAs Heat Pumps Go Mainstream, a Big Question: Can They Handle Real Cold? - The New York Times
https://www.nytimes.com/interactive/2023/02/22/climate/heat-pumps-extreme-cold.htmlHeat Pumps: the Future of Home Heating - YouTube
https://www.youtube.com/watch?v=7J52mDjZztoUS manufacturer releases cold climate heat pump – pv magazine International
https://www.pv-magazine.com/2023/04/18/us-manufacturer-releases-cold-climate-heat-pump/