Testing Condition: Rated heating: Inlet/outlet temperature 40℃/45℃. Dry bulb/wet bulb temperature 7℃/6℃ Nominal heating: Outlet temperature 41℃. Dry bulb/wet bulb temperature-12℃/-14℃ Low temperature heating: Outlet temperature 41℃. Dry bulb/wet bulb temperature-20℃/-21℃ Rated cooling: Inlet/outlet temperature 12℃/7℃. Dry bulb/wet bulb temperature 35℃/24℃ Intemal and extermal machine connection copper pipe are 5m. If need for exceeds 7.5m, you need to contact the manufacturer to change the almost of refrigerant.