Snow and the radon exhaust the outlet has to stay clear
The fan pushes the gas to an outlet that has to stay in open air, normally above the roof, away from windows and fresh-air intakes. A low outlet on the yard side ends up under the snow. The pipe blocks, the manometer changes, and some of the gas can come out near a basement window.
Clearing the outlet is winter maintenance, like a dryer vent. If the U-tube is flat after a storm, a blockage is a frequent cause before a motor failure. A stopped fan. Where the pipe runs.
The 4-day test gives a first reading. The 91-day test covers the three-month minimum Health Canada asks for. Both are $59 before tax: shipping, return and the laboratory are included, taxes extra. The PDF report is sent within 2 business days after the laboratory receives the detector.
Above 200 Bq/m³, mitigation is confirmed with a quote. Gaz Radon is C-NRPP certified for measurement and mitigation.
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