The main material for the manufacture of panel radiators was and remains steel. Such radiators look like two panties cooked with a panels, or a sheet, inside which the coolant circulates through the channels. These radiators have several varieties, but the most popular radiators are 60 cm high, this is explained very simply — they perfectly stand in the existing space under the windowsill, these models are also convenient because they have several types of connection: upper, lower and side. The low thermal inertia of panel radiators allows you to quickly heat both the room and just as quickly, allow it to cool. The appearance of panel radiators is quite aesthetic, in addition, they can be painted in different colors, which can approach the situation you have. But, in spite of the abundance of positive moments, panel radiators have a number of disadvantages: they cannot stand great internal pressure, do not tolerate water drainage, there is a danger of the occurrence of metal corrosion.