SELLEST OSAST
A radon mitigation fan is running. The manometer shows pressure. The post-mitigation test came back low.
So, is the system good?
In this episode of The Indoor Environments Project, host Diane Swecker is joined by Bruce Snead, instructor for the NRPP Soil Gas Mitigation Compliance Inspector course, and Greg Johns, a professional home inspector and certified Soil Gas Mitigation Compliance Inspector, to look beyond whether a mitigation system simply appears to be working.
The conversation explores what professionals evaluate during a mitigation system inspection, common deficiencies found in the field, system labeling and monitoring, exhaust and moisture considerations, active versus passive systems, and the important distinction between radon reduction and standards compliance.
Bruce and Greg also discuss how specialized training and mitigation system inspections can support homeowners, home inspectors, mitigation contractors, state radon programs, and the continued improvement of the radon industry.
Earn 1 NRPP CE Credit
This episode is approved for 1 hour of NRPP continuing education credit for NRPP-certified professionals who are IEA members.
After listening, log in to your IEA account, visit Free Education and Exam Study Guides, click COURSES, and select this episode to complete the requirements for your CE credit.
Continue the conversation in Norfolk!
Join us October 4–7 for The Indoor Environments Symposium 2026 in Norfolk, Virginia. Learn more and register at IndoorEnvironments.org.
Guests: Bruce Snead and Greg Johns
Host: Diane Swecker
Producer: Daisy Rezende
Technical Support: Holly
Content Review: Myca Bruno and Duane
The Indoor Environment Project is brought to you by the Indoor Environments Association—advancing science, policy, and professionalism in radon, vapor intrusion, and indoor air quality.
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Because better air starts with better professionals.
