Drafthood adapter assembly particularly for stoves and fireplaces
AssigneeCFM Corporation
InventorsDuong Luu, Huynh Hy Co, Patrick Kelly, Thomas J. Beal
Life of this patent
Estimating the term…
Abstract
A drafthood assembly for inclusion within a vent stack for a direct venting stove or fireplace, converting the direct venting stove or fireplace for use with a natural venting flue. The assembly includes an air intake section for feeding ambient room air into the combustion chamber and an exhaust gas section for feeding ambient room air into the products of combustion that are exhausted from the combustion chamber in order to cool the exhaust gas products so that a B-vent type flue can be used to carry the exhaust gas products out of the dwelling.
Claims24
An apparatus for converting a direct vent appliance located in a room to operate with a natural vent flue including a vent stack for exhausting products of combustion (POC's) from a combustion chamber of the appliance, comprising:
- a drafthood assembly insertable into the vent stack, the drafthood assembly including an air intake section and an exhaust gas section, the exhaust gas section being positioned about a length of an exhaust pipe, each of the air intake section and the exhaust gas section being fluidly isolated from the other;
- wherein the air intake section introduces room air into the appliance for combustion and the exhaust gas section introduces room air into the vent stack to cool POC's exhausted from the appliance.
A direct vent appliance, which is adapted to operate using a B-vent flue having a vent stack through which exhaust gas products of combustion in the appliance are vented, comprising:
- a drafthood assembly in the vent stack, said drafthood assembly having an air intake section and an exhaust gas section, said air intake section forming a passage for air in a space within which the appliance is located to enter the appliance for combustion, and said exhaust gas section forming a passage for ambient air to enter the vent stack to be vented with the exhaust products.
Dependencies are inferred from the claim text.