Mitigation Systems

What is a Radon Mitigation System?

A radon mitigation system is a series of components designed to reduce radon gas concentrations in the indoor air of a building. The most common and effective type is the Active Soil Depressurization (ASD) system, which draws radon from beneath the foundation and vents it safely above the roofline.

Interior radon mitigation system: Pipe runs from basement or garage through closets to attic, with fan in attic and vent above roofline.

Exterior radon mitigation system: Pipe and fan are outside, venting above the roofline for homes where interior routing is not feasible.

Garage system: Fan and piping are routed through the garage, keeping the system out of living spaces.

Attic installation: The radon fan is placed in the attic for a quiet, hidden solution.

Crawlspace system: Specialized vapor barriers and piping are used for homes with crawlspaces.

System monitor: A manometer or similar device is installed to indicate that the system is operating properly.

System Components

Our radon mitigation systems are designed to effectively reduce radon levels in your home. Each system is custom-designed for your property and installed by certified professionals. The main components of a radon mitigation system include:

Active Soil Depressurization (ASD) system: Seals exposed surfaces and acts like a vacuum, to enable drawing out air from beneath your home.
Suction Point(s): A hole is drilled through the slab or crawlspace to create a suction point where radon gas is collected from beneath your home.
PVC Piping: Special piping is used to route the radon gas from the suction point to the exterior of your home.
Radon Fan: A specially designed fan is installed, usually in the attic or outside, to draw radon gas from beneath the house and vent it safely above the roofline.
System Monitor: A manometer or similar device is installed to indicate that the system is operating properly.
Sealing: Cracks and openings in the foundation are sealed to improve system efficiency and prevent radon entry.

Our systems are designed to be quiet, energy-efficient, and visually unobtrusive. We use only high-quality, durable materials to ensure long-term performance and reliability.

System Types

The interior system consists of a pipe that is run from the basement or garage through a closet (or multiple closets, if the home has more than one floor) to the attic. Fire barriers are installed where applicable. The radon fan is placed in the attic and exhausted through the roof, with an appearance similar to that of a plumbing stack. The system monitor is attached to or near the vent line in the basement or closet area. The radon fan is installed in the garage rafters or attic and is exhausted through the roof, with an appearance similar to that of a plumbing stack. The system monitor is attached to or near the vent line in the garage or basement area.

An exterior system is used when other system placements are not feasible or economical. The vent pipe is routed through the box plate (rim joist) or foundation wall to the outdoors. The fan is placed outside at ground level. The vent pipe runs vertically along the side of the home and exhausts above the roofline. The property owner has the option to paint or box in the vent pipe. The system monitor is attached to or near the vent line in the basement or lowest level of the building.

Active Soil Depressurization (ASD)

An Active Soil Depressurization (ASD) system is the recommended and most commonly used radon reduction method. It involves using a fan to draw radon gas from beneath the building and vent it safely above the roofline, preventing it from entering the living space.

ASD for Basements and Slab-On-Grade:

ASD is used for basements and slab-on-grade by sealing one or more suction (or draw) points, PVC pipe, and a specialized radon fan. ASD acts like a vacuum, drawing air from beneath the slab and venting it safely above the roofline.

ASD for Crawlspaces:

ASD is used for crawlspaces when soil is exposed in the crawl space and is covered with a specialized plastic (vapor barrier). The plastic is sealed to the perimeter walls and a tee is used to connect to the pipe of the ASD system. While the fan is attached and running, air and gases are drawn from underneath the plastic barrier.