Convector and panel heaters heat the room relatively evenly, by circulating the air in the area, and quickly, because the heat is immediately released as soon as the heating elements are at the right temperature. In addition, they create a protective zone of warm air in front of poorly insulated windows or external walls, reducing the feeling of cold in the vicinity of these cold bridges. Convector and panel heaters do not use any heating material other than air, so the heat they give off quickly decreases after they are switched off. However, if the room is properly insulated, the heat produced can continue to heat the room for a longer period of time.