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Radon Diagnostic Services describes itself on the Better Business Bureau as providing radon diagnostic and mitigation services for residential and commercial properties. Its website says it has over 30 years of continuous operation and has remediated over 10,000 homes in Eastern MA and Southern NH. In a 2014 message-board post, a writer said Radon Diagnostics in Andover had installed many systems over the years for homes the writer sold. A recent customer says Ryan replaced a radon fan that was so loud it could be heard down the street, reinforced and secured the unit, and checked the entire system from the basement to the attic. That customer says the new fan is silent. A 2025 customer said the company returned the call quickly, sent a fair quote quickly, showed up on time and handled the radon mitigation install cleanly. A 2025 customer wrote that the install took a few hours and that adjustments were made so the system would run with very little noise, since it had to be installed near the living room. A 2025 customer said Fred made the initial visit to discuss the system's placement and that Jeff and one other person performed the installation. That 2025 customer wrote that post-mitigation results were good. A 2024 customer said Co-Owner Jeff Burwell and Ryan did the installation, with the system running from a basement closet next to the oil tank, up through the garage and out the top of the garage roof. That 2024 customer said they measured everything carefully and followed up the following week.
“* **All Messages By This Member #45681** I like Radon Diagnostics in Andover (978) 420-8697 They have installed many systems over the years for homes I sold. Small company, good people and competitive pricing. http://radondiagnostics.com *Joyce Murphy* 781-771-5146 William Raveis Real Estate 1713 Mass Ave, Lexington 781-861-9600 joyceSmurphy@ ... |”
Amazing experience! I scheduled with Fred, the owner. He went out of his way to accommodate me, as my radon fan was so loud that you could hear it down the street from my house. Ryan came out and replaced the radon fan and reinforced/secured the entire unit, as it had not been properly done before. He also checked the entire system from the basement to the attic. Quick, easy, and affordable. I would highly recommend…and the new fan is completely SILENT! Amazing!
We just had our radon system recently installed and are very pleased with the outcome. The install only took a few hours and adjustments were made so that the system would run with very little noise since it had to be installed near our living room. All of our concerns were addressed by Jeff, who is very knowledgeable when it comes to radon. We highly recommend working Radon Diagnostics Services.
Just outstanding. Fred made the initial visit and we discussed placement of the system which we were both on the same page about. My radon levels were no where near very high but still just over the limit and we decided to proceed to install a mitigation system considering the plans to finish the basement. Jeff and (I wish I could remember his name) performed the installation and I could not be happier with the whole process. Jeff answered any questions, was extremely professional and informative. System is running great thus far and post mitigation results are good. Thank you all for the excellent service!!! I will make sure to recommend you to others.
I had a very good experience with Radon Diagnostic Services. They were recommended to me and they returned my call quickly, came out to take a look at my home beforehand, no silly or pushy sales tactics from them, they sent me a fair quote quickly, set up a time to do the radon mitigation install, showed up on time, and professionally, cleanly, and efficiently handled the install with no b.s. They care about their profession, customer service, were personable, seemed very experienced, the job came out well, and the system works perfectly. Thanks Guys!
Our buyer's agent recommended Radon Diagnostic Services, and from our first call and visit with Co-Owner Fred Ghilarducci, we knew the job was in good hands. Co-Owner Jeff Burwell and Ryan did the installation, and together we worked out the best possible location to place the system to keep it as unobtrusive as possible. This was not an easy installation. The best spot for the system was next to our oil tank in a basement closet, up through the garage to keep it out of the way, into the crawl space above the garage to protect the fan and reduce noise and out the top of the garage roof. They measured everything carefully and handled this job like it was their own home. They also followed up the following week. They have our highest recommendation.
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2 changes recorded — last scanned Sep 29, 2026.
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