The air source heat pump for low temperature unit can be used normally at minus 25°C, and the energy efficiency ratio is above 2.0 at -20°C. It is a high-efficiency, energy-saving, safe and environmentally-friendly high-tech heating/cooling equipment, It is the main product produced by our company for long-term export to the EU for heating/cooling, widely used for indoor heating in winter in more than ten countries in the European Union.

If your installation district keeps long time under minus 20 degree in winter, then please choose the ultra-low temperature EVI heat pumps.
Otherwise, if not very cold, the ordinary classic air to water heat pump TAN series would be good for you, which work minus 15 degree.