Become a Certified Radon Tester

This online certification program is provided by InterNACHI® School ( for free to InterNACHI® members. To become a certified radon tester:

  1. Join InterNACHI® as a member.
  2. Complete InterNACHI's Home Inspector Certification Requirements.
  3. Complete InterNACHI free, online Advanced Radon Measurement Service Provider Course. 

Certified inspectors download and use InterNACHI's certification logos.


How to Perform Radon Inspections Textbook

More Inspector Certifications

Members have unlimited access to all of InterNACHI's free, online courses. Learn at your own pace, and when you're ready, you can attain more than 60 additional types of inspector certifications (at no additional cost).

Branding and Marketing

After becoming certified, work on branding and marketing your home inspection business.

Everything You Need, All in One Place

Everything you need is right here in a 15-Step Checklist for Home Inspector Success

Run a Successful Business


Membership Benefits

InterNACHI provides members over $75,000 worth of membership benefits.

Not a Member?