Patent ID: 11859826
Assignee: WOLF STEEL LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A termination cap for a direct vent appliance, the termination cap comprising:
an outer housing having an interior surface, an outer end, and an inner end that is in fluid communication with a combustion air conduit to deliver combustion air to the appliance;
an exhaust body nested within the outer housing and having an exterior surface that is completely encompassed by, and partially offset from, the interior surface of the outer housing thereby forming a combustion air passageway between the exterior surface of the exhaust body and the interior surface of the outer housing, the exhaust body having an inner end in fluid communication with an exhaust conduit from the appliance;
a trim plate having an outer surface that includes an exhaust gas opening therethrough, the outer surface of the trim plate being offset from the outer end of the outer housing by a plurality of sides that include combustion air openings to permit the passage of combustion air into the termination cap, the trim plate positioned exterior to a structure within which the termination cap is located during use, the sides and the outer surface of the trim plate partially defining a void into which combustion air is drawn; and
a deflector positioned along an outer surface of the trim plate adjacent to a top of the termination cap and adjacent to the exhaust gas opening, the deflector aiding in deflecting exhaust gases expelled through the exhaust gas opening of the trim plate away from a wall of the structure within which the termination cap is mounted,
wherein combustion air drawn through the combustion air openings in the sides of the trim plate and into the void is heated through the passage of exhaust gases through the termination cap causing a portion of said combustion air to exit the void through a combustion air opening in an upper one of the sides of the trim plate, combustion air exiting through the upper one of the sides of the trim plate creating an air wash along a surface of the wall of the structure within which the termination cap is mounted to help protect the surface from damage from contact with exhaust gases exiting the termination cap.