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

Claim 0:
1. 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; and
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;
wherein a portion of the combustion air drawn through the combustion air openings and into the void is heated by exhaust gases passing through the termination cap causing a portion of said combustion air to exit through a combustion air opening in an upper one of the sides of the trim plate, heated combustion air exiting through the combustion air opening creating an air wash along a surface of a wall of the structure to help protect the structure from damage from contact with exhaust gases exiting the termination cap.