Patent ID: 7717702

Claim:
A direct sidewall vent system between a fuel-burning appliance in a first space and an external atmosphere through a wall between the first space and the external atmosphere, the direct sidewall vent system comprising: a wall assembly that defines a first passage for communicating combustion gas generated through operation of the fuel-burning appliance to a first outlet through which the combustion gas is communicated to the external atmosphere, the wall assembly defining a second passage for communicating makeup air from the external atmosphere to the fuel-burning appliance in the first space, the second passage having a substantially uniform cross-sectional shape through the wall between the first space and the external atmosphere, the direct sidewall vent system comprising an external portion that is situated within the external atmosphere and at which the first outlet is located, the external portion of the direct sidewall vent system having a top, a bottom, and spaced sides, the external portion of the direct sidewall vent system having a first inlet within the external atmosphere through which makeup air from the external atmosphere is communicated to the second passage, the first inlet situated to draw substantially the entirety of makeup air from the external atmosphere delivered to the fuel-burning appliance through the second passage from a location above the first outlet.