Radon systems have to be protected from the cold for them to work efficiently. The benefits of radon systems through the attic are easily canceled out by poor placement.
Keep Radon Vent Fans Operational
One thing you need to know about radon systems is that they can churn up a lot of water droplets inside the exhaust pipes and suction as they operate. During the colder months of the year, that condensation can freeze if the system is installed outside the home. By positioning the radon system in the attic, the fans have more protection from the cold, allowing them to work more efficiently.
Extend the life and improve the operation of your radon system. Ensure the fan is inside your attic space.