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passive
Types of Radon Systems
Radon systems come in two forms, the passive radon system, and the active radon system. The active radon system is most often used after the passive system has been unable to reduce the levels of the gas in the building.
Radon Tests – Passive Vs Active
There are two main types of radon tests used to measure the amount of radon in a commercial building or home. These are the passive and active radon tests.