Abstract: The present invention provides a novel means for generating hydrogen gas which is particularly useful in domestic applications, particularly, a hydrogen-fueled gas fireplace. The hydrogen generating means comprises a filter-press electrolyzer that generates hydrogen from an electrolyte solution and has a relatively small size, e.g., about 600 mm2, and is thus convenient for domestic use. Suitable domestic applications include cooking stoves and the like as well as gas fireplaces. A hydrogen-fueled fireplace comprises a housing containing a firebox, an electrolyzer, which comprises a series of electrolytic cells, and a power module.

Abstract: A heating appliance having which a viewport through which combustion can be viewed incorporating a portion which is reflectorized to reflect some of the radiant heat of the burning fuel in the fire chamber back into the fire chamber to maintain high temperatures in the fire chamber for efficient combustion while reducing the temperature of the outer surface of the viewport and accordingly the likelihood of injury to persons accidentally touching the viewport and the possible damaging effects of thermal exposure and shock. The viewport is reflectorized in the preferred embodiment by a treatment which enhances the reflectivity of the transparent or translucent portion over that of transparent glass.