73142127
Sep 22, 1977
May 30, 1978
FIREPLACE HEATING EQUIPMENT-NAMELY, FREE-STANDING FIREPLACE STOVES INSTALLED IN ROOMS TO PROVIDE AN EFFICIENT SOURCE OF HEATED AIR TO SURROUNDING ROOMS BY GENERATING A FLOW OF HEATED AIR FROM THE STOVES TO THE SURROUNDING ROOMS AND BY INCREASING THE BURNING EFFICIENCY OF THE FUEL
Environmental Control Apparatus