There are 5 main difference when it comes to the comparison between cold weather heat pumps and ordinary heat pumps:
1. Ambient air temperature range. Cold weather heat pumps are able to run in ambient air temperature ≥ 25℃; while it’s -7℃ for ordinary heat pumps.
2. Compressor. Cold weather heat pumps use Copland EVI compressors specially; Ordinary heat pumps use common scroll or rotary compressors.
3. Refrigerant. It’s usually R404a for cold weather heat pumps, while R22, R417c, R134a, R410a, etc for ordinary heat pumps.
4. COP. Cold weather heat pumps perform a good efficiency in low air temperature. COP of cold weather heat pumps can reach 1.8 when ambient air temperature is -20℃.
5. Cost. The manufacturing cost of a cold weather heat pump is 30% more than an ordinary heat pump. So the price of a cold weather heat pumps are much higher, too.
P.S. For product information of cold weather heat pumps please go to this page.