If the radiator is placed in a window niche, special attention should be paid to the appropriate distances from the window sill and from the floor. Too short a distance and the use of radiator housings may result in a decrease in the expected thermal efficiency, even about 10%.

Characteristic data of selected types of cast iron radiators.

The table summarizes the operational, technical and design parameters of selected cast iron and steel radiators, and the table compares cast iron and steel radiators (FROM 4703).

Comparison of cast iron and steel radiators.

Radiators with a smaller installation depth are characterized by greater efficiency, These radiators should be covered with a primer coating and varnish. Avoid the use of varnishes with metallic admixtures, because it can cause a reduction in thermal efficiency even by 30%. The working pressure for actuated radiators usually does not exceed 4 barium, temperature should not be higher than +100°C. Sectional radiators, especially cast iron, can cause a lot of trouble, when there are residual molding sand. If the radiators are not well rinsed, then the residues of this mass circulating in the installation may cause immobilization, and even the destruction of delicate regulatory elements, as well as pumps. The response time of the installation with these high capacity radiators is long, which causes difficulties in the correct operation of thermostatic radiator valves in automated heating systems. On the other hand, in traditional installations with coal boilers with simple automation, the thermal stability of the system is favorable.