Direct Vent Furnace Exhaust

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.

Direct vent furnace exhaust.

Gas or oil fired side wall power vents are provided by several manufacturers listed at the end of this article. Horizontally through the sidewall or vertically through the roof. It provides a vent pipe for exhaust gases but uses unconditioned not cooled or heated air from the space around the furnace for combustion air. Direct vent systems mount on an outside wall and have a vent within a vent system to draw in outdoor air to support combustion and exhaust flue products to the outdoors.

The single pipe non direct vent system is used where there is no real need for a separate combustion air intake vent. The outer and bigger pipe draws the air for combustion from outside while the smaller one is constructed on the inner position to expel the exhaust gas. The vent cap installs on the outside wall of the home. The required air is drawn in from outside through horizontal piping in a direct wall vent and the burnt exhaust gases are expelled the same way.

This construction uses two different sizes of pipes within one unit. A direct vent gas furnace has an air intake and exhaust system that is enclosed in a sealed pipe system. This system creates an air tight combustion chamber which improves efficiency because it eliminates back drafting. The pipes can be set in two ways.

Distance to an air conditioner or heat pump compressor condenser unit to the nearest point of a direct vent gas heater exhaust. 10 feet note 5 clothes dryer vent clearances termination.