FAQs
The questions homeowners actually ask, answered without the sales pitch
Short answers below, each linking to the long version. If what you want to know is not here, phone and ask. Ten minutes of explaining beats you having to guess.
Starting from scratch
Cost, and how long it takes
Testing, before and after
Living with the system afterward
Answers in depth
One page per question, each going further than a paragraph allows. These are the ones where the detail changes what a homeowner should actually do.
- How often should you test for radon?Every two years is the EPA's standing advice for a home that has already been measured, and immediately after anything that changes how the house breathes. Levels are not a fixed property of a building; they move as the foundation ages, as equipment is replaced, and as the ground around the house changes.Read the answer
- How long does radon mitigation take to install?Budget one working day: a morning start and a mid-afternoon finish is the usual shape for a single-family house. Plan on a second day where there is more than one foundation type, a crawlspace needing a sealed membrane, or an interior pipe route that has to be threaded through finished space.Read the answer
- How does radon enter a home?It is pulled in. Warm air escaping through the upper floors leaves the lower level at slightly lower pressure than the soil around it, and that difference draws soil gas through every opening in the foundation: slab cracks, the sump pit, gaps around pipe penetrations, and the hollow cores of block walls.Read the answer
- Short-Term vs Long-Term Radon Testing: Which Should You Use?A long-term test of ninety days or more gives the truer picture of what you are actually exposed to, because it averages across seasons. A short-term test of two to seven days exists for situations with a deadline, and for deciding quickly whether a house needs a closer look.Read the answer
- Is a radon mitigation system under warranty, and for how long?Three separate things carry cover and they expire on different schedules: the fan under its manufacturer's warranty, the installation workmanship under the contractor's, and the result itself under whatever performance commitment was written into the quote. Get all three in writing before work starts.Read the answer
- What is a safe radon level?There is no level with no risk at all, which is why the EPA frames its guidance as an action threshold rather than a safety line. Act at 4.0 pCi/L and above, and consider acting between 2.0 and 4.0. Below that, reduction is still possible but the return on it falls away.Read the answer
- Is it safe to live in a house with radon?Every house has some. What matters is the concentration and how long you live with it, and both of those are things you can find out cheaply and change if you need to. A high reading is a maintenance problem with a known fix, not a reason to leave.Read the answer
- How dangerous is radon exposure really?The EPA identifies long-term radon exposure as the leading cause of lung cancer among people who have never smoked, and as a substantial contributor overall. The risk is real, it is dose-dependent, and it is one of the few environmental exposures a homeowner can measure and eliminate directly.Read the answer
- Can a heat recovery ventilator (HRV) fix a radon problem?An HRV dilutes indoor air, so it will lower a reading, but it treats the symptom rather than the cause and its effect is bounded by how much air it moves. For a house above the action level, sub-slab depressurization is the appropriate system; an HRV is a supporting measure in specific situations.Read the answer
- Will a radon mitigation system increase my electric bill?Barely. The fan draws roughly what a household light bulb does and runs without stopping, which for most homes works out to a few dollars a month. The sealing done during installation typically offsets part of that by closing air leaks that were already there.Read the answer
- How loud is a radon fan?Correctly sized and mounted outside the living space, it is close to inaudible indoors. What people notice is a faint rush of moving air near the pipe rather than the motor. Noise complaints almost always trace back to an oversized fan or a mounting decision, not to the technology.Read the answer
- How long does a radon fan last?Manufacturers rate them for several years of uninterrupted running and many exceed that comfortably. Replacement is a short service call rather than a new system, since the pipe, the suction point and the sealing all stay exactly as they are.Read the answer
- Does a radon mitigation system hurt resale value?The experience runs the other way. An untested house is an open question a buyer has to price in; a house with a system and a low confirming result on file has already answered it. Most buyers read it the way they read a newer roof.Read the answer
- Radon in Well Water: When Does It Matter?It can, though soil gas is overwhelmingly the dominant route into a house. Water becomes worth investigating in one specific situation: a private well combined with indoor readings that stay stubbornly high after a properly working system is in.Read the answer
- How Does Radon Testing Work During a Home Inspection?The measurement is similar; the controls around it are not. A transaction test is performed by a licensed measurement professional under documented closed-house conditions with tamper protection and a chain of custody, because the result has to withstand challenge from someone with money at stake.Read the answer
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