Abstract: The invention relates to a fireplace insert having unique characteristics of a fiberglass insulated twin wall construction engineered to work on the principle of air convection. Cold air is drawn into a bottom inlet, circulated through channels between the firebox and an air shroud or air casing, and forced through outlets at the top of the unit back into the room. A controllable damper cuts down the heat carried up the chimney, and an air tight door controls the amount of in-house air drawn to feed the fire, and hence, the amount of heat that escapes up the chimney.

Abstract: A wood or coal-burning stove or fireplace has a baffle attached to a flue. Upon opening of the stove door or the fireplace door, the baffle is automatically adjusted to increase the amount of air admitted to the stove or fireplace and thus prevents smoke from coming out of the doors.

Abstract: A thermal shield device is provided for association with a flue extending from a combustion chamber and which shield device comprises a substantially U-shaped member comprising radially spaced inner and outer walls and with the shield being positioned parallel to the vertically extending flue and covering approximately 180.degree. of the periphery thereof, normally between the flue and an adjacent wall, the flue being open ended and having a deflector collar or neck positioned at its upper end connecting to the open or hollow interior thereof for deflection of hot air rising through the shield out into the room, and with other deflector members being positioned intermediate the inner wall of the shield and the adjacent flue to deflect hot air rising along the flue periphery out into the room.

Abstract: This stove or fireplace control has a barrier across the lower front portion of the fire chamber to prevent air from flowing in under the grate. The unit when formed as a stove also includes frame means having spaced inner and outer walls with the inner wall defining a fire chamber and with the frame means having air inlet means at a lower portion thereof connecting to the space between the frame walls. A horizontally extending heater duct is provided in the frame means at the top thereof and is open at the front of the stove for receiving air from between the walls and conducting it horizontally and forwardly of the stove for discharge into the room for heating the same. Additionally the stove has an opening in the top thereof and a cooking plate is removably positioned over such opening in the top of the stove for direct exposure to the fire chamber on its lower surface.