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GFS Radon is a Salem company focused on radon mitigation and testing for homes and commercial properties. The company says it has been in business for 25 years, and customers repeatedly describe Ryan and his team handling both new systems and difficult follow-up work. A recent April 2026 reviewer said Ryan further mitigated high radon levels after another installer declined the job. Other customers describe quick installations, effective systems confirmed by testing, and continued help years after an initial installation; a December 2025 Reddit commenter also praised the clear pricing and relatively quick work. The company's website says its team is certified in radon testing and mitigation and is licensed and insured, but that licence statement is self-reported rather than registry-verified. Confirm the credentials, testing plan, and post-installation follow-up before booking. GFS Radon fits homeowners or commercial clients who need measured radon work, from testing through mitigation. Ask how the proposed system will address your basement layout and how results will be checked afterward.
“FYI: We ended up going with GFS Radon. Super happy with their work. Reasonable rates, that were clearly explained, and was able to get the work done relatively quickly!”
“My parents just used GFS Radon and highly recommended them! They’re based in Salem https://gfsradon.com/”
Ryan was able to help further mitigate the radon levels in my house after SWAT refused to even attempt to look at it (the system was previously installed by them by a past owner). I highly recommend him for new systems or optimizing old ones, he was a pleasure to work with and did a great job.
Really fantastic. Did a professional initial installation. Then years later, there is an issue with the suction fan and Ryan offered to come out the next day to provide us with another fan. The mark of a great vendor is that they are there for you, years later👍
We have worked with Ryan who is an outstanding professional, He is responsible and caring, we highly recommend his services.
Ryan and his team at GFS did a great job handling a radon issue during a recent real estate transaction. Ryan was onsite within 2 days to assess the problem and quickly and professionally install a mitigation system. He followed up with both buyer and seller to ensure post-install test results were reviewed and that all parties were happy with the result. Would definitely use GFS in the future.
Ryan and his team did excellent work for us. We were concerned due to high radon levels in our basement indicated by a continuous monitor (Air Things). The radon system was installed quickly. It is very effective, confirmed by a radon test and our monitor. Highly recommended.
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1 change recorded — last scanned Aug 5, 2026.
Full fire rebuilds4.2
Fire and water damage rebuilds5.0
Fire and flood restoration5.0
Takes on large, difficult projects3.8