HCR measures a heat pump’s capacity to heat effectively in cold conditions, with 70% as the baseline for cold climates.

What is Heating Capacity Ratio (HCR)?

Heating Capacity Ratio (HCR) is a metric that evaluates a heat pump’s ability to produce heat in extremely cold conditions. Specifically, it’s calculated by dividing the heat energy a heat pump produces at 5°F by the heat energy it produces at 47°F. This ratio indicates how well a heat pump can maintain heating performance as outdoor temperatures drop.

Importance of HCR for Cold Climate Heat Pumps

Cold climate heat pumps are required to have a minimum HCR of 70% in northern regions to ensure they can effectively heat in colder conditions without relying heavily on supplemental heating sources. A high HCR minimizes the need for backup energy, helping to maintain comfort and efficiency even in very low temperatures.

By selecting a heat pump with an adequate HCR, homeowners can ensure that their systems provide consistent warmth and energy efficiency, reducing heating costs and reliance on secondary heating sources during winter.