Fireplace furnace

Patent · Tue Oct 06 04:00:00 EDT 1981

OSTI ID:6190508

Mcdonald, C B

The fireplace furnace is constructed with two flues which merge into a single chimney. An upper flue is directly above the fire as is in ordinary fireplace and includes a first damper which can be moved between open and closed positions. A lower flue is near the bottom of the fireplace and contains a secondary damper. Glass or metal doors enclose the front of the fireplace furnace and the fire is built with the upper damper fully open. The glass doors are closed, the upper damper is closed and the lower damper is open. The fireplace then operates as a furnace and can be connected to duct work existing throughout the house. The use of the lower flue increases the radiation of heat and conserves fuel by forcing the heated products of combustion to remain within the burning chamber of the fireplace furnace for a greater length of time. One outside air intake is connected to each side of the fireplace furnace firebox. Dampers are provided in the outside air intakes and are operated through connecting shafts to a pair of dampers disposed in house heating ducts connected on each side of the furnace. The house duct work includes fans disposed on each side of the furnace and as more heat is required within the house, the house thermostat activates the fans which cause movement of the respective dampers within the duct work. The duct dampers in turn control the air intake dampers thus increasing the intensity of the fire.

• Assignee: EDB-83-085380
• Patent Number(s): US 4292952
• OSTI ID: 6190508
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320101* -- Energy Conservation
Consumption
& Utilization-- Residential Buildings-- (-1987)
APPLIANCES
BLOWERS
CONTROL EQUIPMENT
DESIGN
DOORS
DRAFT CONTROL SYSTEMS
DUCTS
EQUIPMENT
FIREPLACES
FLOW REGULATORS
FUEL ECONOMY
FURNACES
GLASS
HEATING
OPENINGS
SPACE HEATING
WOOD BURNING APPLIANCES
WOOD BURNING FURNACES