Health Canada's guideline is 200 Bq/m³ in the normal occupancy area of a home. Above that, it recommends fixing the problem, within a year, with more urgency the higher the level is.
Yes. In the Cross-Canada Radon Survey, 17% of Ottawa–Gatineau homes tested at or above 200 Bq/m³, higher than the Ontario figure of about 12%. Levels vary house to house, so testing is the only way to know.
Health Canada recommends at least three months, usually a 91-day test, in fall or winter. Short tests of a few days can screen a home during a sale but do not give an annual average.
In 2026 most sub-slab depressurization systems in Ontario cost roughly $2,800 to $3,800. Simple basements can come in lower; large homes or several slab sections cost more. Be cautious of quotes far outside that range.
Radon fans are small inline fans, usually mounted in the garage, attic or outside, and are quiet from inside the house. They run all the time and typically draw 50 to 100 watts.
Health Canada recommends a professional certified under the Canadian National Radon Proficiency Program (C-NRPP). Every system on this site is installed by a C-NRPP certified professional.