Abstract: A radiant heat collector is disclosed in the form of a reflector oven. The oven collects heat from a heat source adjacent to the oven. The reflective surfaces are detachably secured to end plates, which plates are of a generally rectangular configuration. Tie rods may be used to retain the grill assembly, or tabs on either the grill or on the reflective surfaces, or on both, and may be used for this purpose with or without tie rods. The assembled reflector is of a generally elliptical section shape (rather than parabolic) to enhance the thorough heating of the material placed on the grill to be heated. The elliptical section encompasses one end of an ellipse about one focus line and a source of heat may be conveniently located at the other focus line. The major axis of the ellipse dips downward from the section to the heat source and the rack or grill is positioned under the section focus line esssentially to one side of the major axis.