Does the thermostatic head need batteries to work?
Classic thermostatic heads do not need any batteries. on the other hand, electronic thermostatic heads need batteries to close and open the circuit through an electric motor. These thick ones are recognizable by their size and because they have electronic components such as LEDs, displays, etc...
I need to replace an old cast iron radiator. How do I get a list of your radiators that might be compatible with the existing connections?
Existing connections in vertical position: TESI + Vertical Furnishing Radiators. The datasheets of the radiators show a column labeled "Center distance (mm)." The Centerline should be similar to the size of the existing connections. Existing connections in horizontal position: TESI + Vertical Furnishing Radiators. The data sheets of the radiators show a column called "Width (mm)." Radiator width + valve spacing must be similar to the measurement of existing connections.
What is the valve at the top of my radiator for?
Each radiator, connected to a boiler or a heat pump, is equipped with a vent valve always located at the highest part of the heating body. This element is used to remove any air formed inside the heating system and the radiator itself. To see how to do this look at the guide how to vent a radiator at this link: https://www.irsap.com/en/support-en/irsap-consiglia-3/2096-how-to-vent-radiators