Sioux Falls Radon Mitigation System Installation

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.

Radon mitigation system fan and PVC stack installed on a Sioux Falls home

Your test came back over 4.0 and now you are reading contractor websites. Here is the short version of what you are buying. A sub-slab depressurization system is a suction point cut into the basement floor, a sealed PVC run from that point up and out of the house, and a fan mounted somewhere above the living space that pulls a slight vacuum under your entire slab. That vacuum reverses the pressure difference that was drawing soil gas indoors. Done right it is boring, quiet, and permanent.

Why this works better than anything else you will be offered

Sealing cracks alone does not do it. Air exchangers do not do it either, though they get pitched a lot. The reason active soil depressurization is what the EPA and the South Dakota DANR both point to is that it treats the source rather than the symptom: instead of trying to filter or dilute radon after it is already in the house, you stop it entering. On a Sioux Falls basement with drain tile around the footing, one well-placed suction point commonly depressurizes the entire slab, which is why a 2,400 square foot ranch and a 1,400 square foot ranch often cost about the same to mitigate.

What actually drives your price

Foundation type and pipe route, in that order. An unfinished basement with a sealable sump crock and a mechanical room that lines up with the garage attic is the easy version. A house with a partial crawl space, a finished lower level, and no clean vertical path is the hard version, and the difference is labor hours rather than materials. DANR puts the South Dakota average install at $1,200. Around Sioux Falls most single-family jobs land between $1,100 and $1,900. If somebody quotes you a firm number before asking what your foundation looks like, they are quoting an average and hoping.

What we stock and why it matters

Both trucks carry RadonAway RP145 and GP501 fans, which covers the range from tight clay-heavy soil to loose fill under a newer slab. Fan sizing comes from a diagnostic suction test on the actual house, not from square footage. Oversizing a fan wastes electricity and makes noise; undersizing it means a system that runs forever and never gets you under 4.0. Neither one shows up until the post-test, which is exactly why the post-test is included rather than sold separately.

Install day

Eight to four for most homes. Trevor cores the slab with a shop vac at the bit so the concrete dust stays in the basement, digs out a small suction pit, sets the pipe, seals the visible cracks and the cold joint, mounts the fan, and hangs the manometer where you can see it from the stairs. Before he leaves he shows you what a normal reading looks like on that gauge, because a manometer nobody understands is a manometer nobody checks. A test kit stays in place afterward and the lab result comes back a few days later.

How long does a radon mitigation system last?

The pipe and sealing work last as long as the house. The fan is the wear item, and DANR gives an expected life of about 11 years with replacement running $145 to $300. Budget for one fan swap per decade and nothing else.

Will the system make my basement cold or drafty?

No, because it is pulling from under the slab rather than out of the room. A properly sealed system draws soil gas, not conditioned air. If your basement got noticeably colder after an install, the suction pit was not sealed correctly and that is a warranty call.

Can you install in winter in South Dakota?

Yes, and we install year round. Winter is actually when radon readings peak here because the stack effect from a heated house pulls harder on the soil, so a January test is closer to your true worst case than a July one.

Available across the Sioux Falls area

Related radon services

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