The heat-absorbent chamber is for an incandescent light, which is accommodated in a glass casing (1) afterwards closed by screwing a base (2) of glass onto it. The light is lit by insertion of a match through an air hole (3) and rubbing it against a striking surface in the latter. The air heated by the light rises through outlet holes (6) at the top, while cold air flows in through the holes at the bottom.
展开▼