What Happens when Windows are Open during a Radon Test?

Testing for Radon? It's Important to Close all Windows, not just ...

Opening windows at the upper levels actually has the potential to increase radon levels during a short term test. In reality, if enough windows are opened, very small amounts of wind will be far larger factors than stack effect, and radon levels will probably decrease.

Can Radon Tests Tell if Windows are Open?

It is important to note that when testing a home for radon, the home must stay closed up. If any doors or windows to the outside are open, the test will be invalid.

How do you Manipulate a Radon Test?

Open windows . By opening the windows, you increase fresh air circulation and reduce the concentration of radon in the home.
Install basement vents.
Use fans.
Create exits.
Mitigation.

Can Anything Affect a Radon Test?

Rain, thunderstorms and high wind can also have an affect on radon testing results. Radon readings have been known to go down when the outdoor wind speeds increase during periods of high humidity. When the seasons change such as fall to winter, radon testing can be affected.

Can a Radon Test be Fooled?

What happens to a radon test result if the windows were opened, the test device moved, or there was any other evidence of tampering during the test? It's simple: the test is voided and must be run again. No exceptions.