Four Heat Pump Makers Develop Successful Sub-Zero Prototypes in the US
9th January 2024
Four more heat pump manufacturers have successfully developed cold-climate prototypes as part of the Department of Energy’s (DOE) Residential Cold Climate Heat Pump Challenge.
To take part in the Challenge, manufacturers’ heat pumps must deliver 100% heating capacity without the use of auxiliary heat, with significantly higher efficiencies at 5F (-15C), and ideally operate at -15F (-26C), among other specifications.
In December 2022, Johnson Controls, now officially part of the Challenge, announced that it had developed an air source heat pump prototype that can operate in temperatures below -20F (-29C) as part of the DOE’s challenge.