Airborne Radon Mitigation
|Exterior ASD System||Exterior ASD Fan|
The most common method employed to remediate airborne radon is active soil depressurization (ASD). Also referred to as sub-slab depressurization (SSD). However, in isolated cases, (HRV) systems heat recovery ventilators, are installed when (ASD) is not practical. But because (ASD) is recognized as the Best Available Technology (BAT), that is what we will discuss in detail.
(ASD) is a process whereby a 3" PVC pipe protrudes below the slab level of a structure and is routed to the roofline of the structure. A sealed fan motor is mounted in-line which is designed to create suction under the slab and draw the radon bearing soil gas through the pipe, venting it to the open air outdoors, above roofline. What makes this process so successful is the fact that the radon is "intercepted" before ever having a chance to permeate up through the basement slab. Furthermore, since we're dealing with the so called "sub slab atmosphere," there is no heat loss involved with the operation of the system during the heating season. Electrical consumption by the fan amounts to no more than $70-$95 annually on average.
Connecticut Basement Systems Radon began offering airborne radon mitigation services in the summer of '87, making us the first Connecticut based company to offer this service. We have successfully mitigated airborne radon concentrations as high as 726 pCi/L. Our mitigation experience extends beyond the residential market to include commercial buildings, town halls, day care facilities, high schools, and complete condominium and detached housing complexes. Our experience and capabilities are simply unmatched in the industry .