Abstract: The heating system for an operating table comprises a multi-layer heating pad (2) having at least one heating segment (12a, 12b, 12c, 12d) which is adapted for being electrically heated and which is pervious to X-rays. A control and regulating unit (3) serving to control or regulate the heating current necessary for achieving an adjustable temperature of the heating pad (2) is connected to the heating pad (2). The heating pad (2) is equiped with a heating conductor (16) comprising a resistor (18) having a specific electric resistance and being wound in helical form about a carrier (17) made from an electrically non-conductive material which, regarding its mechanical properties, is rubber-elastic in the temperature range of between T=10.degree. celsius to T=200.degree. celsius. The different layers of the heating pad (2) are intimately bonded to form a composite material.

Abstract: A wall mounted space heater includes a housing having front and rear walls cojointly defining a space therebetween divided into a pair of convective air channels by a substantially vertically disposed solid flat metal plate having a first side facing the rear wall and a second side facing the front wall. The first side of the plate is coated with a layer of plastic in which is embedded an electric resistance heating element for heating the air flowing through the convective channels from air inlet openings formed in the housing bottom and lower portion of the front wall to air outlet openings formed in the upper portion of the front wall. The second side of the plate radiates heat toward the front wall and the metal plate is so disposed that some of the radiated heat passes through the openings in the upper and lower portions of the front wall directly into the room to be heated.