That way should there be a problem with the furnace that causes the exhaust temperature to exceed design the exhaust vent system has almost 40 more capacity to handle the excess heat before it reaches the point where it can fail.
Pvc furnace roof vent.
Acrylonitrile butadiene styrene is lighter than poly vinyl chloride and less dense it s made from a lower grade of waste petroleum by product it weakens when exposed to direct sunlight and it burns easier than poly vinyl chloride.
The outer pipe draws air for combustion from outside and the smaller pipe occupies the inner position and is used to vent the exhaust fumes.
The patented new flue cap is designed to improve air flow and eliminate excessive moisture and debris that can rust or damage high efficiency gas furnaces tankless hot water tanks plumbing or other pvc vented installations.
Despite the confusion the safe practice would suggest the use of pvc schedule 40 pipes for the air intake vent on the furnace and cpvc for the exhaust flue vent given its higher service temperature.
When the vent is withdrawing air from the house it expels the gas outside through the vent.
It s made of zinc coated galvanized steel for durability and reliability.
This piping system incorporates two pipes of different sizes in one unit.
Other aspects of high efficiency furnace venting.
Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl.
This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.
The black finish helps this vent blend into your home s rooftop.
The concentric vent allows both the intake for combustion air and the exhaust vent to pass through a standard roof or sidewall.
Also known as the type b this vent is operating on the natural air convection.
Run the vent pipe up through the roof and install a metal or pvc flashing collar over it.
The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.
This vent features a heavy duty screen which helps protect against small animals from entering your home through the vent.
Cvent 3 is for use with 3 in.
This high efficiency venting system must be installed when you install the new furnace.
More product details close.
Basic instructions on how to run pvc flue venting on high efficiency furnaces.
This type is an ideal alternative to natural vent systems.
On one occasion a customer called us out just to paint the vent stacks on his roof black.