Is it necessary to turn off systems that recycle indoor air for closed-house conditions?

Turning off systems that recycle indoor air is not a requirement for conducting radon measurements, particularly in residential settings. The primary focus during testing is to ensure that the home is in a closed-house condition, which means that windows and doors should be closed for at least 12 hours before and during the testing period to minimize external influences on radon levels.

While some testing protocols may suggest turning off certain ventilation systems to avoid interference with accurate radon readings, it is not universally mandatory. Specifically, the guidelines may vary by state and specific test methods used, allowing for flexibility in what systems are operated during the testing period.

Therefore, it is essential to follow the specific instructions provided by the radon measurement guidelines and protocols, which can clarify whether it is necessary to turn off air-recycling systems. In many situations, testing can still be accurately conducted with these systems operational, provided that the necessary closed conditions are maintained. This understanding helps technicians navigate radon testing requirements effectively in various scenarios.