ZERO CLEARANCE FIREPLACE TYPE HEATING DEVICE

摘要

ZERO CLEARANCE FIREPLACE TYPE HEATING DEVICE An efficient zero clearance fireplace heating device is disclosed. The device includes a conventional metal firebox having closeable glass doors and a flue adapted to communicate with a chimney. The sides and bottom of the firebox are enclosed with mutally spaced metal walls to form a plurality of interconnected chambers for circulating either room air or outside air therethrough. A portion of the circulated air is returned to the room through a vent and a portion is admitted to the firebox for combustion air. The combustion air is initially directed across the interior surface of the glass doors to minimize blackening thereof by smoke from the fire. Baffles may be provided between walls of the interconnected chambers to provide a labyrinthian series of passages for air circulated therethrough whereby heat is exchanged between the walls and the circulating air so that the outside surfaces of the device remain sufficiently cool to permit installation adjacent combustible structural members.