... .974.334.434.03Circulating waterL/h250400780123016202040Circulation pipe connectionsmmDN25DN32DN32DN40DN50DN50Outlet water temp.°C55Unit Dimensionmm765×691×845765×691×10451476×691 ... oil boiler, gas boiler,coal boiler, electricity water heater etc.Large application:It can provide heating and hot ... school, hospital, military, villa,village etc. Commercial Series Air Source Heat Pump (Circulation heating)