Two radon tests, two results 80 and 320 can both be real
Two reports can say 80 and 320 without either being “wrong.” Four days against 91. August against January. Basement bedroom against the kitchen. Detector by a window against detector in the centre of the room. Closed house against a house opened on the weekend. Each choice changes the number.
Health Canada compares the guideline with a long average, at least three months, ideally in winter, in the occupied zone of the lowest lived-in level. That is the report that decides mitigation. The short test serves an offer or a first alert. If they diverge, do not average the two on a calculator.
Reading the report. An invalid test. 4 days or 91 days.
Reference points: Health Canada, what you need to know about radon and the 200 Bq/m³ guideline. The two-year timeline between 200 and 600, and one year above 600, comes from Health Canada’s guide for radon measurements in homes.
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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