A new air-source heat pump developed by Rheem reportedly provides uninterrupted heating under -22.9° F ambient conditions. The Endeavor Prestige series has a heating performance factor (HSPF2) of up to 8.5 and a coefficient of performance of between 1.5 and 2.0 at 17.6° F. During extensive testing in sub-zero temperatures, the heat pump delivered dependable heat and exceptional efficiency. Source: Rheem

The system successfully passed the U.S. Department of Energy’s Cold Climate Heat Pump Challenge launched to advance development of such technologies. During the challenge, heat pump performance was evaluated in the Canadian and northern U.S. climate, where temperatures can dip well below 0° F. Results revealed that Rheem's residential heat pump had delivered outstanding performance: the system operated at a 9% higher HSPF2 than the challenge specification, underscoring its efficiency.

"We were not surprised that our team of dedicated, innovative engineers at Rheem developed a residential heat pump that was able to provide 77% of nominal heating capacity at -15° F ambient temperature and provided uninterrupted heating operation at -23° F ambient temperature surpassing expectations and delivering top quality performance," said Jeff Goss, director of product management.