• the device has been tested by the factory at an outdoor temperature of -25 ° C;
• the pump runs smoothly even at an outdoor temperature of -30 ° C;
• At an outdoor temperature of -20 ° C, the flow temperature is 60 ° C.
• the maximum measured COP of the device is 7,1;
• these are class A circulation pumps;
• maximum power limitation system;
• external noise reduction system;
• Possibility to connect up to three cascades of devices;  
• The patented coaxial heat exchanger is very efficient and almost completely resistant to freezing and clogging.

For more information, see: http://www.highpower.ee

Instructions can be found at: Fujitsu Waterstage air-to-water heat pumps