radon fan replacement cost 5
https://radonbasementcraft.juniperbrief.com/posts/understanding-radon-in-basement-testing-mitigation-and-costs-in-st.-louis
When radon levels get high, installing a fan can run between 800 and 1500 dollars including labor; it's not cheap, but more expensive models often last decades. I was quoted 1200 last year for a replacement fan and new ductwork, and the peace of mind is worth every penny.