Manufacturers can accurately predict how much cfm an inline fan will move in these ducts.
Radon exhaust fan installation.
14 3 radon vent fan installation requirements 14 3 1 vent fans used in radon mitigation systems shall be designed or otherwise sealed to reduce the potential for leakage of soil gas from the fan housing.
If the levels are still high additional pipes may be drilled into the slab and connected to the same fan.
All radon mitigation installation standards require that the radon fan be located outside the living space of the home.
The reasoning for this is that if a leak was to occur above the fan your house could have a really high radon level.
Reset your radon detector then wait 48 hours and check your reading again.
Get a final radon reading before you seal the sump cover.
So how do you mitigate the expense as well as the radon.
Perform a diy radon mitigation installation.
However with radon fans you re at the mercy of soil conditions sub slab fill suction pit sizing and much more.
In many states radon mitigation requires a license.
Radon mitigation system installation can be expensive and if you have radon you may feel like you cannot avoid that expense.
Radon can be pulled from the soil beneath a house by attaching an exhaust fan to the collection pipe or to the sealed sump see page 9.
Then after you seal the cover turn on your in line fan and put the system to work.
So garages attics and on the outside of the house are the only acceptable locations for fan placement.
Radon mitigation standards require that the fan to be placed outside of the living space of the home.
After all the work is done the house will be re tested for radon.
You certainly should not go without a mitigation system over the long term if you know your home has high radon levels.
In the hvac world fans are always placed on a specified duct size 4 10.
The location of the radon fan.
To prevent outside air from being drawn from the end of the collection pipe a water filled trap should be installed in the pipe beyond the point where the fan is attached.
Fans placed in attics garages and outside locations will keep you safe.