Trusted Northglenn Radon Mitigation

Radon fans are most commonly installed in the garage, attic, crawl space, or on the exterior wall of the home along the route of the exhaust pipe. The ideal location is above the living space and below the point where the pipe exits the home, so that any potential fan leakage exhausts outside rather than indoors. Garage and attic installations are popular because they protect the fan from the elements while keeping it accessible for maintenance. Exterior installations are also acceptable and are sometimes preferred because they eliminate any risk of indoor radon leakage from the fan housing.

The most reliable indicator of an undersized fan is persistent radon test results above 4 pCi/L despite the system appearing to run normally. You can also check the manometer reading and compare it against the expected pressure range for your system - low pressure with a working fan often signals insufficient fan capacity for your soil conditions. Homes with dense clay soils, large slab areas, or multiple sub-slab zones are particularly prone to undersized fan issues, especially if the original installation used a builder-grade fan. A certified radon contractor can assess the system and recommend a higher-performance fan if needed.

The clearest sign that a radon fan needs replacement is when it stops running entirely, which you can confirm by checking the manometer and listening for motor noise. Other warning signs include excessive humming or grinding, significantly reduced suction on the manometer, or radon test results that have climbed above 4 pCi/L despite the fan appearing to run. Age is also a factor, as fans over 10 years old are statistically more likely to fail and may be worth proactively replacing even before issues arise.