Furnace Direct Vent Through Roof

That depends on whether you have a standard efficiency or a high efficiency furnace.

Furnace direct vent through roof.

The condensing furnace produces condensed exhaust gases that contain water and carbon dioxide which together form carbonic acid that results in a corrosive condensate. Above the air intake inlet. The vent outlet must be installed a minimum of 12 in. The outlet inlet of the vent and air intake terminations shall be a minimum of 12 inches above highest anticipated snow level.

You can find some of these fireplaces here if you re looking for a vent free option you can find some great options here yes the best fireplaces on the market generally use a direct vent venting. Ok you need an exhaust system for your new direct vent gas fireplace. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof. The pressure differential creates a natural way for the gases to exit the flue.

A direct vent gas furnace has an air intake and exhaust system that is enclosed in a sealed pipe system. Most furnaces are vented directly through roofs with either a single pipe or a two pipe system. It draws air from within the house for combustion. The hot combustion gases expand and get lighter as the cold air entering the furnace enters at a higher pressure.

What to know before you install b vent furnace pipe. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. The furnace may be vented vertically through the roof. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.

Even furnaces vented through walls are routed through vertical pipes that extend above the roof. The furnace uses an exhaust vent motor that pushes the exhaust gas through the vent pipe creating a positive static pressure in the vent. What to know before you install b vent furnace pipe. Also known as the type b this vent is operating on the natural air convection.

The air rises enough to get expelled through your roof. Gases produced during combustion are very hot and as such easily rise through the flue. The air is then vented outside through a b vent pipe which is set vertically to expel combustion air through the roof. This system creates an air tight combustion chamber which improves efficiency because it eliminates back drafting.