1. The aluminum radiators have a physical property dood heater conductivity, quick heat dissipating, good heat usefullness, light weight and lower-energy consumption. The thermal output released from the aluminum finis 3 times of the cast iron fin and the alumium fin has good anti-corrosion.

2. The hardness of circulation water used inside radiators should be controlled between 5F-18F (under the standard of nutral warter). The hard warter can easily make radiators accumulatr dirt and corroded.

3. The heat conductively data of radiators indicates: That the thermal output released from every m2 heat dissipating area per unit is W/M2Centigrade when the average temperature in radiators is 1centigrade lower than the air temperarure in the room.