Owner maintenance · source-linked
Radon Mitigation System Maintenance Checklist
Use a simple owner checklist for the warning device, fan, visible pipe, labels, service records, and recurring radon retesting.
Direct answer
Check the warning device regularly, keep the fan running, preserve the system label and service record, investigate visible or audible changes, and retest indoor radon at least every two years. Maintenance cannot be replaced by listening to the fan.
Reviewed September 5, 2026. United States federal guidance. Device instructions and applicable state requirements take precedence.
Evidence standard
Built from the official primary guidance linked on this page.
Source check
Reviewed September 5, 2026 · maintained by RadonVerdict.
Owner maintenance calendar
Three moments that should already be on the record
Regularly
Check the warning device against the installer mark or instructions. EPA says to check it regularly; use the interval in your system documentation rather than inventing a universal schedule.
After a change
Record alarms, new noise, vibration, visible damage, repairs, fan service, renovations, and the new warning-device baseline.
At least every 2 years
Retest indoor radon as EPA advises. A moving manometer or audible fan cannot verify the radon concentration in the room.
Make the warning-device check routine
EPA advises looking at the system warning device regularly. Compare it with the installer's normal mark or instructions and record a changed, flat, damaged, or alarm condition.
A quick recurring reminder is more dependable than waiting for a noise. Place the schedule with other home maintenance without covering or altering the indicator.
Inspect only what can be checked safely
Look for visible damage, disconnected or cracked accessible piping, missing labels, unusual vibration, new noise, or changes around the system. Preserve photographs and dates for the installer.
Do not open electrical equipment, alter fan sizing, cut piping, or change foundation penetrations. Those are contractor-level tasks with building and electrical implications.
Keep one system history
Store the installation contract, diagnostic notes, fan model, warranty, baseline manometer mark, pre- and post-mitigation tests, repairs, and future test reports together.
A complete record helps a new owner or service professional understand whether a change is normal, covered by warranty, or connected to earlier work.
Measure the air on a schedule
EPA says it is a good idea to retest a mitigated home at least every two years. Retest after relevant repairs, major renovations, or other changes that can affect system or building performance.
The mechanical indicator and indoor radon test are complementary. One shows system pressure or alarm status; the other measures radon during a defined period.
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Check only what you can confirm. The summary keeps unresolved items visible instead of converting uncertainty into a pass.
Open the full test plannerCommon questions
Quick answers
Do radon mitigation systems need maintenance?
Yes. EPA compares them with furnaces or chimneys and advises regular warning-device checks plus recurring indoor retesting.
How often should I check the manometer?
EPA says regularly but does not set one universal household interval on the cited page. Follow the installer documentation and use a recurring reminder.
Is fan noise enough to know the system works?
No. Check the warning device and verify indoor performance with a radon test.
Evidence boundary
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