Reliable Cozy Corner Radon Mitigation

Most radon professionals recommend a visual system inspection at least once per year to check for obvious issues like fan failure, pipe disconnection, or seal degradation. In addition, radon levels should be tested regularly to confirm the system is still performing effectively. Over time, factors like foundation settling, new cracks, or fan wear can reduce system performance even if nothing looks visually wrong. Keeping a regular testing and inspection schedule is the most reliable way to ensure your home stays protected.

The pipe diameter of a radon system - either 3 or 4 inches - determines what size fan can be installed, and the two sizes are not interchangeable without pipe modification. Four-inch systems are capable of moving significantly more air volume and are better suited for larger homes, multiple suction points, or highly permeable soils where large airflow is beneficial. Three-inch systems work well for smaller homes or situations where high suction rather than high airflow is the priority. When replacing a fan, always match the inlet and outlet dimensions to your existing pipe to ensure a proper, airtight fit.

Installing an undersized fan is the most common mistake, resulting in insufficient suction to keep radon levels below the EPA's recommended action level of 4 pCi/L. On the other end of the spectrum, an oversized fan can create excessive negative pressure beneath the foundation, potentially causing backdrafting of combustion appliances like furnaces, water heaters, or fireplaces. Backdrafting is a serious safety concern because it can draw combustion gases, including carbon monoxide, into the living space. Always verify system performance with a manometer and conduct a radon test after any fan replacement to confirm safe and effective operation.