Radon Fan Noise Tide

Understanding What Normal Operation Sounds Like If you own a home in St. Louis with a radon mitigation system, you have probably gotten used to the low hum coming from your radon fan. That sound is a sign that the system is working, pulling soil gas from beneath your slab and venting it safely above the roofline. But when that familiar hum changes into a rattle, a whistle, or a vibration that travels through your floor joists, it is time to pay attention. The line between