Elstein BST construction panels are thermally insulated infrared radiation areas, which are equipped with ceramic IR panel heaters HTSL. All parts of the housing are made from stainless steel. Therefore HTSL heaters with a single power up to 1000 W can be used. An insulating layer, which is designed for high thermal loads and placed on the rear of the heaters, leads to a significant reduction of the temperature in the wiring compartment of BST construction panels. At the same time the efficiency increases up to 10 %. The BST construction panels are factory assembled so that the user has to do the wiring, insert the BST panel into a steel section frame to be made on site and connect the panel with the electricity mains.