Humphrey Radiant Fire Antique Gas Heater - gold and black enamel, textured finish ornamental cast iron, with ceramic "radiants" - some of which are broken; the Humphrey Co starter in the early 1900s and patented the Radiantfire gas heater, which operated on natural gas, heating a set of ceramic inserts that would glow and radiate heat into the room. Ceramic tiles can be purchased, when in stock, from Burge Hardware Fort Worth

　　(found this source through dearbornheater.com/radiants)