Abstract: A direct vent gas fireplace is provided with a heat shield forming a combustion air expansion and distribution chamber covering a substantial portion of the upper surface of the firebox enclosure and having a circular combustion air inlet opening in its upper surface and being in communication with the lower portion of the firebox, and the products of combustion from the firebox are directed out of the fireplace through a pipe extending through the upper enclosure surface and out through the combustion air inlet opening in the heat shield with the axis of the pipe being offset from the center of the inlet opening so that when a combustion air inlet duct is sleeved over the pipe and connected to the inlet opening a portion of the combustion air path between the pipe and duct which feeds into the combustion air expansion and distribution chamber is substantially widened to provide space for the combustion air to expand outwardly rather than backing up the combustion air duct.

Abstract: A termination device for a through the wall connection to the double walled coaxial ducting of a horizontal direct vented gas fireplace or the like comprising a mounting means having an opening therethrough for mounting said device on the exterior of a wall having a passage therethrough with the opening registering with the passage, a first pipe adapted for connection with the outer of the coaxial ducts secured to the mounting means and projecting inwardly thereof and adapted to extend through the wall passage, deflector means supported in spaced relation outwardly from the mouth of the first pipe and presenting an air deflecting surface formation surrounding and sloping inwardly towards the mouth of the first pipe to a central opening in substantially coaxial relation with but spaced from the first pipe, said air deflecting surface formation being adapted to deflect air inwardly into the first pipe, a second pipe adapted for connection with the inner of the coaxial ducts extending from an outer end located o