The Proved heatilator Fireplace, America's Leading Fireplace.
Heatilator Inc., 1947. Trade Pamphlet, orange wraps. Quarto, pp 9. b/w photographs and construction details on each page. Laid-in price list. A warm air furnace fireplace which circulated heat throughout the house, the fireplace itself was made of boiler plate steel, and could be placed in stone, brick or wood..... More