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US 4,424,792 AGranted
Induced draft system for residential heaters
OwnerRonald J. Shimek, Daniel C. Shimekinventors
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Abstract
A heater without a chimney is installed inside of a residence. An induced draft system is installed outside of the residence. The heater exhaust gases are connected to the induced draft system with an insulated through the wall exhaust pipe which is cooled by mixing cool outside air with the exhaust gases as they are exhausted to the atmosphere.
Claims13
An induced draft system for connection to a heater that is adapted to heat an interior space, comprising:
- an insulated exhaust pipe for connection to said heater in said interior space,
- an induced draft system housing mounted outside said space to be heated,
- said insulated exhaust pipe being adapted to connect through a wall to connect said heater to said induced draft system housing,
- an intake pipe mounted in said housing for conducting outside cool fresh air into a central portion of said insulated exhaust pipe,
- an induced draft fan mounted in said induced draft system housing,
- said induced draft fan having an exhaust duct connected thereto for conducting hot gas from said heater to the outside of said housing,
- said induced draft fan having an intake duct connected thereto and connected to said insulated exhaust pipe, and
- an electric drive motor connected to said induced draft fan for pulling hot gas from said heater into said insulated exhaust pipe and for pulling cool outside fresh air from said intake pipe and for mixing said hot gas in said cool fresh air in said insulated exhaust pipe before exhausting said mixed hot gas and cool fresh air from said exhaust duct.
5 more elements
Dependencies are inferred from the claim text.