sub-slab depressurization 13

https://radonbasementshop.brightsora.com/posts/why-radon-in-basement-levels-matters-for-jefferson-county-homeowners

Sub-slab depressurization is a method used to prevent soil gases like radon from entering a building by creating negative pressure beneath the concrete floor. A pipe system connects the sub-slab space to a fan that exhausts the gases outside. This technique is commonly installed in new homes and is considered a permanent solution for radon mitigation.