radon in crawl space

https://theradonmitigationcostpulse.birchreport.com/posts/how-much-does-radon-mitigation-cost-a-homeowner-s-guide

That radon in crawl space is a real concern, especially in older homes. The crawl space acts as a direct pathway for the soil gas to enter the living areas above. Testing is straightforward with a simple kit, and if levels are high, a mitigation system with a fan and vent pipe can pull the gas from under the house and safely disperse it outside.