US 4,224,921 A · Fireplace with air control dampers

Abstract

A fireplace includes a controlled external air intake and means to preheat this air during its passage to the firebox through a heat exchanger system. This heated air also passes into the room in which the fireplace is situated. This air routing is fully controlled by dampers and when entering the room may induce a slight positive pressure within the room rather than the negative pressure caused when combustion air is drawn from the room. A chimney damper is provided with a plurality of positions and when fully closed, seals off the chimney so that cold air cannot flow down the chimney and into the room. The outer skin or shell is insulated thus enabling installation with relatively little clearance and glass closure doors may be used to close off the front of the grate area from the room thereby preventing air from being drawn from the room and also preventing ashes, cinders or the like from falling from the firebox component.

Claims14

Dependent claims

A fireplace assembly comprising in combination an outer shell and a firebox component therein, a flue exit communicating with said component and air intake means for said assembly, means between said outer shell and said firebox component selectively to convey air from said air intake means to said component, means to control air to said firebox component, means to convey said air from said air intake means to the exterior of said outer shell, means between said outer shell and said firebox component to convey heat from said firebox component to said air in order to preheat said air when said fireplace is operating and damper means to control the flow of combustion gases through said flue exit, said damper means also closing off said flue exit when in the closed position.

Dependencies are inferred from the claim text.

Fireplace with air control dampers

Life of this patent

Fireplace with air control dampers

Life of this patent

Abstract

Claims14