Our radon mitigation is complete! We went from 435 Bq/m3 to 22 Bq/m3.

Forced air systems just move it all around the house and “leaky” house doesn’t really help (it’s the pressure pull of heating a space that is the issue); a house either has high levels or it doesn’t. Even our garage (no basement) was at 150 Bq/m3 and it’s as leaky as it gets. The mitigation process seals all the basement large open holes and helps mitigate basement smell (since it’s sucking all the moist earthy air below the cement and blowing it out the side).
Thanks to Radon West. This company is also the one helping with the UofC radon study. Learn more here:
Note: In Canada we side-wall vent. Rooftop vents ice up in our cold weather. Canadian studies on dissipation is that within a meter of the vent the radon reading is at normal outside levels; Meaning it dissipates extremely quickly.
More on risks of dying from lung cancer, radon and smoking:
Radon meter I purchased; Radon West confirms it is very accurate for a residential unit. A +/-10% reading is available from it within 7 days. Our unit is loaned out to friends and family pretty much constantly.
Corentium Home by Airthings, Radon Gas Detector, Canadian Version in Bq/m
UofC Calgary study (home owners may be able to get testing for free):