Book - School of Science and Technology

110 Survey of heating methodsCeramicfaceplateFigure 4.13 Typical electrical high temperature panelFloor overHeatingelementsInsulationCeiling boardFigure 4.14 Typical electrical ceiling heatingis, of course, the ceiling itself and some paints and other finishes are unsuitable. Electricalloadings up to a maximum of about 200 W/m 2 of the treated area may be made available.Ceiling heating takes up no floor or wall space and the attributes of an evenly distributedheat output may well be appropriate as a `top-up' service, complementary to variousforms of storage system.Floor heatingAlthough the more common form of electrical floor heating is that which wasdesigned to use energy provided during off-peak hours, an alternative direct methodmay be used, superimposed upon a solid ground floor. For this application, avariant of the type of element applied to the manufacture of low temperature panelsis used, having a rating of up to about 150 W/m 2 , laid close to the finished floorsurface. Typically, the structural floor is covered with about 50 mm of insulatingmaterial and the heating elements follow prior to a final layer of chipboard withcarpet tiles or some similar finish. Such an arrangement is particularly suitable for