Abstract: A radiant panel which can be used for heating or cooling and in floors, walls and ceilings, has a honeycomb layer of vertical metal webs or fins and rigid upper and lower cover boards rigidly adhered to upper and lower surfaces of the honeycomb layer. The upper cover board has router-cut channel there through, the channel having a width and being elongated in the shape of a selected pattern for at least one heat transfer tube that extends along the channel in the selected pattern. The tube is pressed into the honeycomb layer past the upper surface of the honeycomb layer for at least partly crushing the metal webs or fins of honeycomb layer in the areas of the channel for establishing a heat transfer engagement between the tube and the honeycomb layer. Dragon Board Brand construction board is preferred as the cover boards, the honeycomb layer as preferably aluminum and a heat reflecting layer is preferably adhered to the lower surface of the lower cover board.

Abstract: A fire resistant wall construction has inner and outer spaced apart panels each made of at least one layer of catalyzed magnesia cement such as DRAGONBOARD brand panels, mineral wool insulation between the panels and a plurality of studs, such as metal studs, connected to the panels for supporting and separating the panels along the wall construction.