sub-slab depressurization 2

https://radoncontractormehouse.northvaledigest.com/posts/how-to-find-a-reliable-radon-contractor-near-me

Sub-slab depressurization is a common radon mitigation technique where a vent pipe is inserted through the concrete slab of a home's foundation into the soil or gravel beneath. A fan attached to the pipe creates negative pressure, pulling radon-laden gas from under the slab and exhausting it safely outside, preventing it from entering the living space. It's effective when the slab is in good condition and the soil is permeable.