Rubber electrical mast split pipe boot roof flashing in black model 81746 37 27 37 27.
Roof pipe from furnace.
Furnace vents remove fumes and combustion air that are generated by gas and oil fired furnaces.
Type b vents are a standard design that most modern gas furnaces use.
The air is then vented outside through a b vent pipe which is set vertically to expel combustion air through the roof.
If your furnace has an afue rating of 90 or lower it probably exhausts the gases though the flue pipe on your roof.
Vents can also be terminated above the roof.
Another problem is that flue pipes that go through the roof tend to be less efficient.
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Gases produced during combustion are very hot and as such easily rise through the flue.
High efficiency furnaces take advantage of the heat in the combustion gases that are wasted in natural ventilation systems.
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The vents consist of circular or oblong pipe that attaches to a flange on the furnace and extends.
Vent pipe in black model pbr 312 4bk 19 97 19 97.
It draws air from within the house for combustion.
Goose neck vent the master flow 4 in.
Perma boot vent pipe repair for 4 in.
Goose neck vent in black can be used to cover exhaust pipes extending through your roof or for attic ventilation.
Gibraltar building products 11 in.
This vent is designed to be used on 4 in.
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.