Moved into new (to us, built in 1980) house 2 years ago. Installed an Airthings radon meter a year ago. Levels get up to 400 Bq/m3 when all the windows are closed. Finally had a radon mitigation system installed. Will hopefully get to much safer level below 100 Bq/m3.
I figured. Pretty sure Canada allows direct venting as well rather than piping to the roof eave.
Yes, we do. Just has to be outside the house.
Ours dropped from about 150-300 to 10-30, so hope it goes well for you all too!