Radon gas is approximately 7 5 times heavier than air.
If radon pipe does not extend above roof line.
Even though the radon pipe does not extend above the roof as close to the ridge as possible it discharges the radon gas in a safe way while reducing the vent height by 15 to 20 feet.
Supports for radon vent pipes shall be installed at least every 6 feet on horizontal runs.
The critter and the fan rarely survives.
The pipe must vent above the roof and be at least 10 from the ground the vent pipe must be 10 from windows unless 2 inches above a window.
1 be above the eave of the roof 2 be ten feet or more above the ground level 3 be ten feet or more.
Vertical runs shall be secured either above or below the points of penetration through floors ceilings and roofs or at least every 8 feet on runs that do not penetrate floors ceilings or roofs.
However the interior solid pipe not perforated needs to be extended through the attic and connected to an exhaust fan.
It is however a noble gas with no chemical affinity but is easily influenced by air movements and pressure.
The vent exhaust needs to be 12 inches above any roof area.
If tests show radon has decreased then we never install the exhaust fan.
Run the pipe up through the interior of the house and through the roof.
Install the vertical pipe.
In a house with forced air heating and cooling radon gas can easily be distributed throughout the entire dwelling.
Hello the epa radon mitigation standards form 402 r 93 078 states the following.
Item 14 2 8 to prevent re entrainment of radon the point of discharge from vents of fan powered soil depressurization and block wall depressurization systems shall meet all of the following requirements.
So to recap the pipe must terminate 12 above a roof.
Utilize a varmint guard to keep debris out of the fan.
Install the concrete slab or polyethylene vapor barrier or both over the ground.
Often the interior pipe is extended through the attic roof without an exhaust fan.
Install an in line fan.
It happens all the time.
Also the pipe must be at least 10 feet from any windows or skylights that can be opened this can be disregarded if the pipe is 2 above the opening.
The problem is that the vent terminates about 2 3rds of the way up whereas my understanding is that according to epa code it should extend at least a couple feet above the roof line to prevent re entry of radon gas into the home.
If running the pipe along side a window the exhaust point must be 2 above it and 12 above the eve too.
In this example even though it does not technically adhere to the epa radon mitigation standards it does adhere to the heart of the safety issue.
Why must radon be vented into the air above my home s roof.
