# Radon Testing for Home Inspections

- **URL:** https://airsenseenvironmental.com/radon-testing-for-home-inspections/
- **Published:** 2026-07-27

Skip to content Radon Mitigation Services ▾ Radon Testing Commercial Radon Mitigation Commercial Radon Testing Indoor Air Quality Crawl Space Encapsulation Service Area Resources FAQ Blog Podcast Reviews & Projects About Us Contact 314-664-9807 Free Estimate Radon Mitigation Services Radon Testing Commercial Radon Mitigation Commercial Radon Testing Indoor Air Quality Crawl Space Encapsulation Company Service Area Resources FAQ Blog Podcast Reviews & Projects Media Room About Us Contact Call 314-664-9807 St. Louis Metro · Missouri & Illinois Radon Testing for Home Inspections IEMA-Certified NRPP-Certified BBB A-Rated Results in 2-3 Business Days Radon testing for home inspections gives buyers and sellers a documented reading inside the inspection window. We place continuous radon monitors under EPA closed-house conditions and return a report you can put straight into the transaction file. Results come back in two to three business days. Call 314-664-9807 Get a Free In-Home Estimate IEMA License #RNM20232346 Free Written Estimates 24-Hour Availability What Your Number Means EPA action level4.0 pCi/L Below action level< 4.0 pCi/L At or above 4.0 pCi/L the EPA recommends mitigation. Below it, no action is required. Built to perform The Transaction Radon Testing During a Real Estate Transaction Radon usually comes up during the inspection period, when there is a fixed window to get answers. A reading at or above 4.0 pCi/L is the EPA action level and commonly triggers a repair request or a credit. Having the number early gives both sides room to negotiate. Protocol Closed-House Conditions Explained A valid short-term test requires closed-house conditions, starting twelve hours before the test and continuing throughout. Keep windows and exterior doors closed Run heating and cooling systems normally Do not run whole-house fans or window units that draw outside air Leave the monitor undisturbed where we place it Placement Where We Place the Monitor The device goes in the lowest livable level of the home, away from drafts, exterior walls, and direct sun. Placement affects the result, which is one reason a professional test carries more weight in a transaction than a hardware-store canister. Deliverable What the Report Includes The average radon level in pCi/L Hourly readings across the full test period Placement location and test conditions Certification details for your file Existing Systems When the House Already Has a Mitigation System A system on the house does not by itself prove the radon level is low. Systems age and fans fail, and a seller may not know when anyone last tested. Check the manometer on the vent pipe, then test. Scheduling Timing Around Your Inspection Window Tell us your deadline when you call. If the result requires mitigation and the closing date is fixed, that sequence gets tight quickly, so it is worth starting the test in the first days of the window. In the Field Where Monitors Go Get Your Number Inspection deadline coming up? Give us the address and the deadline and we will confirm timing. Call 314-664-9807 5237 Old Alton Edwardsville Rd Edwardsville, IL 62025 314-664-9807 · Open 24 hours NRPP-Certified · IEMA License #RNM20232346 Services Radon Mitigation Radon Testing Commercial Radon Commercial Radon Testing Radon Fan Replacement Sub-Slab Depressurization Indoor Air Quality Crawl Space Encapsulation Company About Us Service Area Reviews & Projects FAQ Blog Podcast Resources Media Room Contact © 2026 Air Sense Environmental. All rights reserved. Radon Mitigation & Testing · St. Louis, MO & Metro East, IL