Idaho Radon Services

Radon mitigation installation 101

Idaho Radon Services
December 5, 2023
< 4 min read
radon entering home

Has your home recently tested high for radon? It’s important to install a radon mitigation system to lower your levels and reduce your risk of developing diseases such as lung cancer. Installing a system is generally straightforward and can be done within a few hours, and close to 100% of homes find success with a permanent radon system. 

Radon mitigation systems create a vacuum that pulls radon out from under the home and vents it above the roof in a process called active soil depressurization (ASD). Systems run in your home 24/7, require little maintenance, and only cost a few dollars per month on your electricity bill.

Types of radon systems

We install both internal and external radon systems, and no matter which you choose, we will do our best to hide it out of sight.

Exterior radon systems

Exterior systems begin indoors on the bottom level of your home and are diverted outside to travel up the side of the building. A fan is installed outside as low to the ground as possible. The piping then extends up the home and can be painted to match the exterior, too!

exterior radon system

Interior radon systems

Interior systems also begin on the lowest level of the building, often in a closet, mechanical room, or other hidden area. If the home has an attached garage, we can often run the pipe up through the garage and out to the top of the roof to vent out the gas.

interior radon system

Radon mitigation system parts

Radon systems consist of pipes, a fan, a switch, and a manometer. Below, we’ll discuss each component and how it fits into the entire installation process.

Radon system location

The first step during installation is to find the best location in your home for the system so it is functional, but as hidden as possible.


Next, a hole is drilled on the lowest floor of the home to install pipes. Roughly 15 gallons of material below the concrete are removed to help the fan pull radon out of the soil.

radon system drilled hole


Depending on how big your home’s slab is, how much piping is needed, and what kind of material is under the slab, we’ll install either a 3- or 4-inch PVC pipe.

radon system pvc connector

Fan installation

After piping is complete, a radon fan is installed to actively suck radon out from under the building. Fans usually last at least ten years with little maintenance.

Fans also include a switch to be able to turn the fan off and on. However, it’s important to remember that fans should run at all times to actively remove radon.

Manometer installation

Finally, an airflow gauge called a manometer is attached to the system. Manometers have a tube on the front with liquid inside that indicates if the system is running correctly. The higher the reading on your gauge, the more suction the system has. On the contrary, if the liquid is even, this means the fan may not be running or something else is wrong with the system. You should check that the fan is on and receiving power, and if it is, contact your installer to check on your system.

radon system manometer

After installation

It’s important to retest your home for radon at least two days after the system is installed to ensure the system is removing radon from your home. Once your home is in the clear, you should retest every two years per the Environmental Protection Agency guidelines. Additionally, you should check your manometer monthly. 

There you have it! While some cases may vary, you can rest assured that the installation process will likely not deviate significantly from the steps above. If you have additional questions, please don’t hesitate to call our team at Idaho Radon Services at 208-225-8500. We’d love to help you!

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Boise, Idaho 83713
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