Importance

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Abstract

A prefabricated chimney assembly of the dual-wall type, adapted to be coupled to the flue outlet of a fireplace, is disclosed. The chimney assembly includes an inner conduit extending the length of the chimney assembly to form the flue through which combustion gases flow upwardly, and an outer conduit mounted in spaced relationship to the inner conduit so as to define an annular passage for conducting only outside air downwardly therethrough. An outside-air-inducing means is connected to the open lower end of the chimney assembly and includes a convergent nozzle, the upper end of which is coupled to the lower end of the flue, and an air-turning vane mounted in spaced relationship between the lower end of the chimney assembly and the lower end of the convergent nozzle so that the lower end of the convergent nozzle is positioned within the air-turning vane but spaced therefrom, whereby outside air flowing downwardly through the annular passage is induced into the flue for mixing with the hot combustion gases substantially to cool them and any suspended particulate matter, such as creosote, whereby it remains substantially entrained within the cooled flue gases.

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First Claim