Radon Fan Replacement and System Repair, Sioux Falls SD

Call (605) 210-7667 You hear back from a person, not an autoresponder, within one business day. Call before 3pm on a weekday and it is usually the same afternoon.

Replacement radon fan being installed on an existing mitigation system in Sioux Falls

Go look at the little U-shaped tube on your radon pipe. If the colored liquid sits at the same height on both sides, your system is off and your house is currently unmitigated. That is the whole diagnostic and it takes four seconds. Most people who call us about a fan have just done this for the first time in years, usually because a home inspector or a neighbor mentioned it.

Fans die quietly, which is the problem

A radon fan has no alarm. It hums for a decade and then it stops, and because the pipe is still there and the manometer is small and easy to ignore, a house can sit unprotected through two winters before anyone notices. DANR puts expected fan life at 11 years and replacement cost at $145 to $300. We generally quote a swap around $450 to $650 installed with a retest, which covers the fan, the labor, the new couplings, and the post-repair measurement so you actually know it worked.

Systems somebody else built

A fair share of our repair work is fixing installs, not replacing worn ones. Recurring offenders around Sioux Falls: pipe run entirely on the outside of the house with no insulation, which condenses and ices up in a January cold snap and blocks the airflow completely. Undersized pipe that whistles. A pipe run with a low spot in it, which collects water and gurgles. Sump lids sealed with silicone caulk instead of a gasketed lid, so the seal fails and nobody can service the pump. Discharge terminated below the roofline or too close to a window, which vents the gas back into the house. All of these are fixable without starting over.

What we do not do

We do not condemn a system to sell you a new one. If the pipe route is sound and the sealing is intact, a fan swap and a retest is the whole job, and that is what gets quoted. Trevor has talked more than one person out of a full replacement they were prepared to buy, which is a worse business model and a better night's sleep.

How do I know if my radon fan is working?

Check the manometer. Uneven liquid levels mean the fan is pulling; level liquid means it is not. You can also put a hand near the fan housing and feel for vibration, though a failing bearing can still vibrate while moving almost no air.

How much does radon fan replacement cost?

The fan itself runs $145 to $300 per DANR. Installed with new couplings and a post-repair test, expect roughly $450 to $650 in the Sioux Falls area. Attic-mounted fans cost a bit more because of access.

Can I replace a radon fan myself?

Physically, yes, if the fan is accessible and you are comfortable with the wiring. Two cautions: fan sizing is not interchangeable, and installing the wrong CFM can leave the house above 4.0 while looking fine on the gauge. And without a post-repair test you have no idea whether it worked.

Available across the Sioux Falls area

Related radon services

Need radon fan replacement and system repair in Sioux Falls? Call (605) 210-7667 or send the form for a written, itemized quote. Back to radon mitigation in Sioux Falls.