https://www.pv-magazine.com/2023/03/17/field-data-on-heat-pump-efficiency-cold-climate-performance/ https://www.pv-magazine.com/2023/03/17/field-data-on-heat-pu

https://www.pv-magazine.com/2023/03/17/field-data-on-heat-pump-efficiency-cold-climate-performance/ https://www.pv-magazine.com/2023/03/17/field-data-on-heat-pu... Some data from a U.K. funded study suggested the median was 2.44 here in winter and 2.8 not in winter.