There are different strategies to reducing radon in your home or office. It’s the unique characteristics of the building that dictate which installation option should be used. Below is a quick explanation of each of the systems we install. More installation photos can be seen in the gallery section of the website. You may also be interested to see "The Wall of Shame!" These are photos of installations done by so called pros, home owners, and builders.
HRV (Heat Recovery Ventilator)
Sub-slab depressurization systems are the most common and offer great results even with very high radon levels. The highest radon concentration I have ever encountered was a reading of 331 pCi/L. After the installation was complete, the post mitigation test indicated the levels were less that 0.4 pCi/L. While not all homes can come down to the outdoor average, most can certainly be reduced to below 2 pCi/L and often times much less.
The biggest variable that determines how low the radon concentration can be reduced is the type of aggregate under the home. The ability to move air under the home is very important when reducing radon in the home. This is where knowledge and experience make a difference and why it’s important to choose the right mitigation company.
In short, a sub-slab depressurization system consists of a PVC pipe sealed to a hole cut into the slab.
Sub-membrane depressurization is the system of choice when there is no concrete slab. This is common in crawl spaces or sometimes older homes with or without exposed ledge.
HRV’s (Heat recovery ventilators) can also be used to treat radon problems when installed to increase the air rate change in the basement.“The solution to pollution is dilution.” At least this is the idea when installing such a system. These systems are only installed in certain circumstances, usually when the installation of a sub-slab or a sub-membrane depressurization system is not practical. The concept is to bring in outside air into the basement thus diluting the radon concentration. The HRV takes air from the outside and brings it into the basement. Before it is released into the basement, the core of the unit takes inside air and reconditions the air.