US Radon Management, Inc

Based on the diagnostic evaluation, the US Radon Management, Inc radon experts select and design the best system for the particular building. The active soil depressurization radon reduction (ASD) system is the most popular and successful method used today for lowering radon levels.

As described in Radon Entry & Behavior, a building creates a negative pressure that draws in the radon gas. The ASD systems depressurize the soil by actively drawing in the air and gas from below the slab or vapor barrier (if there is no slab) and exhausts it above the roofline through a 3-4 inch PVC pipe and a specially designed duct fan. For fan specifications, see Radonaway, Inc.

As a NEHA and NRSB Radon Contractor Proficiency Program (RCPP) participant, US Radon Management, Inc must follow RCPP standards for installing radon reduction systems. This includes locating the fan outside and/or above the occupied space in the building, and exhausting the gas above the roofline/eave.

In general, there are three styles of ASD radon reduction systems that we use, depending on the building's design, diagnostic factors and the owner¹s preference. These styles are called interior, garage, and exterior systems.

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.

In a garage system, the pipe is run from the basement, through the box plate (rim joist), into the garage, then vertically along the wall. 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.

Every ASD system carries our nationally renowned transferable guarantee. For most buildings, radon levels below 2.0 pCi/l can be achieved with ASD systems. Generally, the operating cost of an ASD system is between $2.00 and $6.00 per month.

In isolated incidences, techniques other than ASD, such as a heat recovery ventilator, may be necessary to reduce radon levels.