Example of outdoor and through wall clearances for a direct vent wall mount gas furnace.
Through wall furnace vent.
For clean comfortable heat when and where you want it the gas flame is completely sealed inside away from all contact with room air.
Be sure to check the clearance distances required for your particular heater brand and model.
The continuous seam welded combustion chamber draws air from the outside and exhausts through a concentric vent system which keeps the interior air warm and fresh.
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Direct vent wall furnaces.
Direct venting or side wall vent chimney and flue systems are a method of venting the exhaust gases from a heating appliance directly out through the side wall of a building while eliminating the need for a vertical chimney of any sort.
The wall mount direct vent gas furnace exhaust vent outdoor clearance distances shown in our illustration below are an example adapated from williams 2018.
Gas or oil fired side wall power vents are provided by several manufacturers listed at the end of this article.
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The space saving direct vent furnace design mounts to an exterior wall and the adjustable vent assembly adjusts to fit walls from 4 1 2 in.
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Air necessary for combustion is drawn into the chamber from outside through the vent and combustion products are vented directly to the outside.