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Types of Radon Mitigation Systems

Active Sub-Slab Suction (Sub-Slab Depressurization)
This is the most widely used method for homes with basements or slab foundations. It involves installing a pipe through or beneath the concrete slab, connected to a fan that pulls radon gas from the soil and vents it outside through a pipe extending to the roof. It’s highly efficient and operates quietly, making it a reliable choice for many homeowners. Other options include:

1. Passive Sub-Slab Suction
   This system is similar to the active version but doesn’t rely on a fan. Instead, it uses natural air pressure differences to move radon out through a vent pipe. Often installed in newer homes during construction, it’s a simpler approach. If it doesn’t reduce radon enough, a fan can be added later to make it active.

2. Drain Tile Suction
   For homes with drain tiles—perforated pipes around the foundation that manage water—this method uses those tiles to address radon. A fan connects to the drain system, drawing radon gas from the soil and venting it outside. It’s an efficient option if your home already has this drainage setup in place.

3. Sump Pit Suction
   If your basement has a sump pump, this system can work well. A sealed lid is placed over the sump pit, and a pipe with a fan pulls radon gas out, venting it above the roof. It’s a practical solution that builds on existing features in your home.

4. Crawlspace Ventilation
   Designed for homes with crawlspaces, this approach improves air circulation to prevent radon buildup. It might involve adding fans or vents to move air, or placing a heavy plastic sheet over the crawlspace floor with a suction system underneath. It’s an effective way to keep radon levels in check in these types of spaces.

5. Heat Recovery Ventilation (HRV)
   While less common specifically for radon, this system enhances overall indoor air quality. It exchanges stale indoor air (including radon) with fresh outdoor air, all while maintaining your home’s heating or cooling efficiency. It’s a broader solution that can support radon reduction as part of a larger air quality strategy.

Active Sub-Slab Suction (Sub-Slab Depressurization)

This is the most common type of radon reduction system. This method can be used with or without a previously installed sump system. If your basement has a sump pump, a sealed lid is placed over the sump pit, and a pipe with a fan pulls radon gas out, venting it above the roof. A viewport is then installed on your sump lid for inspection and maintenance access.

Fans are typically mounted outside, in a Garage, or in an unoccupied attic space.