We bought Airthings measurement and tested our basement as high. Renata came and gave us a detailed explanation on everything about radon gas. Unlike other company who just want your business and tell you with a method that are most convenient and cost effective for them, Renata is trying to education you.
Colin came on the installation day. When he learned our home (built in 2010, building code not required to have radon system) has a passive system where a pipe connect under slab to whirlybird vent in the roof, he suspect it is no for radon. Since there is a landfill near our community, he suspected it designed for methane. He went extra miles to rent a methane detector on his own cost to make sure our home is methane safe, before installing the radon system.
Also, Colin welcomes the idea of having suction point closer to the center of the house. It means more work and material involved. Colin also capped the passive system for us as well. Applaud Colin's professionalism and dedication for the best result, he has no problem with the approach.
If you want a true professional to make your home safe, this is the only company I would recommend. Thank you Colin, Chris and Renata. After couple days of installation, the radon reading dropped to 20s. This really gives us peace of mind living in our home.