Become a Certified Radon Tester

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

  1. Join InterNACHI® as a member.
  2. Complete InterNACHI's free, online Radon Measurement Professional Initial Training Course. The course is approved by NRPP, AARST, NRSB, ICC, and IAC2. View NRPP approval.
  3. Abide by the Continuing Education Policy for InterNACHI® Certified Inspectors.

Only InterNACHI® Certified Inspectors are permitted to download and use InterNACHI's certification logos.


How to Perform Radon Inspections Textbook

Radon Mitigation System Inspection Checklist

Radon Mitigation System Inspection Checklist is on InterNACHI's home inspection checklist page as a free download. Scroll down that page to get to the radon checklist. 

Radon Test Agreement

Download InterNACHI's Radon Test Agreement. 

Radon Test Waiver

Download the InterNACHI Radon Test Waiver.

Sample "Radon Test in Progress" Notice

Download InterNACHI's free sample "Radon Test in Progress" notice.

International Standards of Practice for Inspecting Radon Mitigation Systems

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?