Heating cooling effect and heating materials, the market now is commonly used radiator, cast iron radiator and aluminum radiator cooling effect is good, Cu-Al composite radiator for two kinds of heat transfer properties of different, the cooling effect is not necessarily good. Steel pipe column type radiator, pipe column type radiator on the pipe column outer wall heat transfer, heat transfer area is small, relatively poor radiating effect. Steel plate radiator, cooling effect can also be. Therefore, the election of the radiator material is also very important, the other room seal can not be ignored, you'd better check the room doors and windows is tight.