Testing Considerations

When planning a radon test, keep the following considerations in mind to ensure accurate results:

• Closed-house conditions: Keep all windows and exterior doors closed (except for normal entry and exit) for at least 12 hours before and during the test. This helps ensure that the test reflects the highest possible radon levels.
• Test location: Test the lowest level of the home that is regularly used, even if it is a basement or crawl space.
• Test duration: Short-term tests are useful for quick results, but long-term tests provide a better indication of year-round average radon levels.
• Weather: Avoid testing during severe storms or unusually high winds, as these can affect radon levels and lead to inaccurate results.
• Heating and cooling systems: Operate your home’s heating and cooling systems normally during the test. Do not use fans or other devices that bring in air from outside.
• Placement: Place the test device at least 20 inches above the floor, away from drafts, high heat, high humidity, and exterior walls.

Following these guidelines will help you get the most reliable results from your radon test. If you have questions, consult a qualified radon professional.