radon fan replacement 2
https://theradonteststlouismedia.focalledger.com/posts/why-every-st.-louis-homeowner-should-schedule-a-radon-test-st-louis
When our radon fan started making a grinding noise, I knew it was time for a replacement before the system lost its ability to pull that dangerous gas from under the house. The old one had been running for years, but the new model is way quieter and moves more air. Spent a Saturday swapping it out—straightforward job with the right instructions, though I'd recommend gloves for the sealant. The detector already shows lower levels.