When removing air from an old cast-iron radiator, you must first prepare for operation. The task is not the most difficult, but it requires several key steps. First of all, before you start venting, you should turn off the heating system and turn off the water supply to a specific radiator. This way, you minimize the risk of flooding and damage to your apartment.To remove the air, loosen the screw connection with a special wrench. On older radiators, loosen the screw connection by less than one full turn to avoid large amounts of water leaking out. It is also important to wait, covered with a cloth, so that the water and air can escape. During operation, you may hear a hissing sound — this sound indicates that air is starting to come out of the radiator.Remember the procedure for removing air from radiators — start with those that are closest to the heat source, and move on to the next ones. In older models, such as aluminum or cast iron radiators, this may take a little longer. When you hear the sound of a jet of water escaping, it means that all the air has gone out and you can close the valve tightly. After completing the process, make sure that the valve is in the closed position.
Ventilation of the cast-iron radiator will increase its thermal efficiency, which will lead to better room heating. This allows the water in the system to cool down quickly, which reduces energy consumption. Remember that regular air release not only saves money, but also ensures the durability of your heating system.Differences between ventilated cast iron and aluminum radiators
Removing air from radiators is a necessary process to ensure their efficient operation. Heating problems are usually caused by the air in the radiator. Different types of radiators require slightly different approaches. Modern aluminum radiators can be equipped with an automatic air vent, which greatly facilitates the process. They expel the residual air on their own, so you don't have to worry about air pockets.However, in the case of old cast-iron radiators, the situation is more complicated. Radiators of this type usually require a manual air removal process. Ventilation holes can be harder to find, and the process of using them requires more care. To effectively remove air from the cast-iron radiator, first turn off the water supply. Then loosen the screw connection by an incomplete turn and wait by placing a cloth under the vent to avoid the risk of flooding the apartment and damaging the exterior surface of the radiator. When you hear the sound of the air coming out, it means that the process has started. When the hissing stops and the water starts to come out without air, you can close the valve.Aluminum radiators are equipped with ventilation holes that automatically remove residual air. This process is automated and less risky. You just need to check periodically that everything is working correctly. transescort.org