... .Adopts world famous parts 3.On line system 4.R410a Air Source heat pumpModel: AW09,AW09B,AW10,AW10B,AW12,AW12B,AW13,AW13B ... (20% than than double pipes or other types ) , repair easily;Air exchanger (Fan coil ) with hydrophilic coating ,higher coefficient of heat ... control the refrigerant flow accurately, SCHNEIDER electronic parts make the unit work safely ,etc ;If you have any requirements, please ...