For fixed capacity units

For fixed capacity units the default is COPmin= 0.89*COP at power output Phpmin=0.5*Php. For staged capacity units the default is COPmin= 0.975*COP at power output Phpmin=0.5*Php.  For variable capacity units the default is COPmin= COP at power output Phpmin=0.4*Php.
It is optional to choose whether the heat pump operates with night set back or not. The bin assumes constant night temperatures during night set back to +1°C, +6°C and 0°C for each climate respectively.  
Other inputs to the calculations is type of heat pump, type of operation of the heat pump, type of control of the heat pump, type of heating (floor heating or radiator heating), minimum source operating temperature, the effect of auxiliary equipment and backup electricity heater.  
Other possible energy sources can also be chosen, but this chapter only treats the heat pumps.