Abstract: Apparatus for cooperation with an associated flue having a first axis extending away from a point proximate to an associated combustion chamber which includes a funnel shaped member having first and second ends. The second end is larger than the first end. A damper is disposed in the associated flue which has a generally central bore. The damper is mounted in the associated flue for rotation about a second axis which is generally perpendicular to the first axis and the funnel shaped member is mounted with the first end higher than the second end and with the second end extending into the damper. The mounting for the damper may comprise at least one rod shaped member extending through at least one wall of the associated flue. The mounting for the funnel shaped member may comprise a plurality of elongated members extending radially from the funnel shaped member to the associated flue.

Abstract: Apparatus for cooperation with an associated flue having a first axis extending away from a point proximate to an associated combustion chamber which includes a funnel shaped member having first and second ends. The second end is larger than the first end. A damper is disposed in the associated flue which has a generally central bore. The damper is mounted in the associated flue for rotation about a second axis which is generally perpendicular to the first axis and the funnel shaped member is mounted with the first end higher than the second end and with the second end extending into the damper. The mounting for the damper may comprise at least one rod shaped member extending through at least one wall of the associated flue. The mounting for the funnel shaped member may comprise a plurality of elongated members extending radially from the funnel shaped member to the associated flue.

Abstract: A fireplace form comprising a firebox having an open front, a back wall, and a pair of side walls extending from the back toward the open front. The back and side walls which at least partially converge in upward direction form a main flue outlet generally at the top of the firebox for communication with a chimney flue. The firebox has at least one aperture therein in its back wall intermediate the bottom of the firebox and the main flue outlet. The fireplace form has ducts on the back side of the firebox in communication with these apertures and the chimney flue, these apertures and ducts constituting auxiliary flues for at least partially ducting away smoke and other products of combustion from the firebox. An outer housing surrounds the firebox and defines a chamber between the firebox and the housing for circulating fresh air over the back side of the firebox and over the ducts so as to be heated for discharge of heated air into a room.