1.TUV efficiency certification 2.Factory audit 3.Adopt world famous parts 4.COP more than 5.5 5.Enviromental friendly Geothermal ground source heat pumpProducts efficiency Certified by TUV, Factory audited by Bureau Veritas.Model: GHP15Heating capacity: 15.5KWPower supply: 380-415V/3/50HzRefrigetation: R410ACompressor: HitachiController: SiemensHeat exchanger: plate type heat exchangerCabinet: ...