What distinguishes an active radon system from a passive one?

An active radon system is characterized by the incorporation of a fan, which plays a crucial role in effectively reducing radon levels in a building. This fan helps to draw radon gas from beneath the foundation and actively expel it outside, thus reducing the concentration of radon in the indoor air. The presence of this mechanical component is what sets active systems apart from passive systems.

Passive radon systems, on the other hand, rely primarily on natural ventilation and the natural flow of air to minimize radon levels. These systems do not have a fan and instead depend on the design and layout of the building to facilitate the movement of radon gas outside. This reliance on passive processes generally results in less effective radon reduction compared to active systems.

Understanding this key difference is important for determining the appropriate radon mitigation strategies in homes and other structures, especially in areas where radon exposure is a concern. By recognizing that the fan is the essential component that distinguishes active systems, individuals can make more informed decisions about radon mitigation methods and their effectiveness.