Radon mitigation warranty questions
Radon warranties vary more than almost anything else in the quote, and the differences are rarely visible from the headline. "Lifetime warranty" can mean the pipe, the workmanship, the fan, or a performance level — and those are four very different promises.
These are the questions that establish what you are actually being offered.
Separate the components
A mitigation warranty typically has two or three distinct parts, and they almost never share a duration. The fan is a manufactured component with its own manufacturer warranty. The workmanship — pipe, sealing, penetrations, mounting — is the contractor's. Some contractors add a performance or result guarantee, which is a different animal entirely.
Ask for each duration separately. A quote that offers "a lifetime warranty" without distinguishing them is describing a marketing position rather than a coverage schedule.
- How long is the fan covered, and is that the manufacturer's warranty or yours?
- How long is workmanship covered, and what does workmanship include?
- Is there a performance guarantee, and what number does it promise?
- Who pays for labor on a warranty fan replacement?
Read the performance guarantee carefully
A result guarantee is only as good as the retest protocol behind it. Ask which measurement triggers it, who performs that measurement, at what location, over what duration, and under what building conditions.
A guarantee that promises a level below the action level but does not specify how it is measured is difficult to enforce, because any disagreement becomes an argument about the test rather than about the system. A guarantee that names the protocol is a real commitment.
Exclusions worth knowing about
Most warranties exclude changes made to the house after installation, and reasonably so — finishing a basement, replacing a furnace, or altering the foundation genuinely changes the conditions the system was designed for.
Look also for exclusions covering fan damage from power surges, freezing, or physical impact; exclusions for systems serviced by anyone other than the installer; and any requirement that you maintain a retest schedule to keep coverage alive.
Transferability
If you may sell the house within the warranty period, ask whether coverage transfers to a subsequent owner and whether there is a fee or notification requirement.
A transferable warranty is a genuine selling point that costs the contractor nothing to offer, and it is worth having in writing alongside the post-mitigation verification result in your house file.
Warranty questions: common questions
Is a longer warranty worth paying more for?
It depends on which component the length applies to. Extra years on workmanship are cheap for a contractor to offer because workmanship failures show up early. Extra years on a performance guarantee are more meaningful but only if the retest protocol is specified. Extra years on the fan are usually the manufacturer's doing rather than the contractor's.
What happens if the post-mitigation test fails?
That should be answered in the written scope before work begins, and the answer should be a named remedy — an additional suction point, further sealing, or a different fan — rather than a discussion to be had later. This is the single most valuable sentence in a mitigation contract and the one most often missing.
Does the warranty cover a retest?
Frequently not, and it is worth asking. Some contractors include a retest with any warranty service; others cover parts and labor but leave the confirming measurement to you. Neither is unreasonable — but discovering it after a fan replacement is worse than knowing it up front.
Keep reading
- Questions to ask before hiring — Fourteen questions that surface the difference between bids in one phone call.
- Red flags when hiring — Nine signals that a bid deserves more scrutiny than a signature.
- How long systems last — The pipe is effectively permanent. The fan is the wear item.
- Post-mitigation testing — The measurement that proves the system worked — and what if it did not.
- All homeowner guides — every decision page in one place.
Get the durations component by component, get the retest protocol behind any performance promise, and get the remedy for a failed verification in writing before work starts.
Sources
- U.S. EPA — Radon
- U.S. EPA — A Citizen’s Guide to Radon
- U.S. EPA — Consumer’s Guide to Radon Reduction
Compare warranties alongside the quotes
Independent licensed contractors provide written scopes and warranty terms. Free to request, and comparing the terms is as useful as comparing the prices.