There are many factors that affect Radon levels in a house. Opening windows and exterior doors may cause radon levels to drop as indoor air gets diluted by outside air. But it is not unusual for Radon levels in a house to actually increase due to open windows. For example, an open window on the top floor of a house can cause more radon to be drawn into the basement as a result of the stack effect. So, the best way to test radon, short-term, is under closed house conditions.
Before you test, prepare for closed house conditions:
- Testing apparatus should be placed at the lowest livable level
- Three feet from doors and windows, away from heat source or humidity
- Windows remain closed before and during the test
- Maintain regular entry and exit through exterior doors
- Maintain normal HVAC operation but no house or window fans
- If a mitigation system is in place, keep it running
If you have any questions about short-term testing in your home contact us or call us at 503.719.6715.