Fresh air intake system for a dwelling having central forced war

Details Fresh air intake system for a dwelling having central forced war Fresh air intake system for a dwelling having central forced war

1992-03-02

1995-01-31

Ford, John K.

Heating systems

Air

Flue heated

126110R, 126117, 165 70, 165901, 165154, F24B 700, F24B 702, F24B 704

Patent

active

053852990

ABSTRACT:
In a dwelling having a forced warm air type central heating system in which the source of heat is the hot gas products of combustion in a furnace, ambient fresh air is introduced into the dwelling to improve the quality of air in the dwelling by a fresh air input duct to the fresh air input of a relatively low temperature flue gas to the fresh air heat exchanger so that the fresh air is warmed and the fresh air output of the heat exchanger is connected by a duct to the forced warm air heating system so that the warmed fresh air is entrained with the air in the system. In a preferred embodiment, the flue gas to fresh air heat exchanger is attached to a section of the furnace flue pipe that is covered by a thermally conductive gas barrier and includes an enclosure for enclosing the outside barrier covered surface of the section of the furnace flue pipe forming an annular space between the gas barrier and the enclosure through which the fresh air flows and is warmed by heat from the flue gas.

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