Our recommended way to test your home. We start a 48-hour preliminary check with a professional radon monitor and place a long-term laboratory detector at the same visit, so you get an early snapshot within days and a reliable long-term answer when the test is done.
Equipment: Airthings Corentium Pro professional radon monitor, plus a long-term laboratory detector
Two tests, one visit
Started together, at the same time
Recommended2 in 1
The snapshot is an early look. The long-term result is the one to act on.
Each test answers a different question. Started together, you don't have to choose between a quick answer and the right answer.
Within days
A professional Airthings Corentium Pro monitor measures radon in your home for 48 hours. It gives you a first look at your radon levels without waiting months, so you know early on what you may be dealing with.
The reading is preliminary. Radon rises and falls with the weather and how the home is used, so a short reading can differ from your long-term average in either direction.
After at least 91 days
The long-term detector stays in place for at least 91 days and is analyzed by a laboratory. Measuring over months smooths out day-to-day swings, giving a much stronger picture of your home's average radon level.
This is the result Health Canada's 200 Bq/m³ guideline refers to, and the one to base any decision about reducing radon on.
We place the professional monitor and the long-term detector in the right spots.
After 48 hours we collect the monitor and walk you through your preliminary reading.
The detector stays in place, undisturbed, for at least 91 days.
We collect the detector, arrange laboratory analysis and explain your results and next steps.
We'll show you how your preliminary reading compares with Health Canada's 200 Bq/m³ guideline. Whatever it shows, your long-term test is already running, so you won't lose any time.
Lower reading
Good news for now. Because radon changes with the seasons, your long-term result is what confirms your home's average.
Near or above the guideline level
Your long-term test will show whether this reflects your home's average. We'll explain what the reading may mean while you wait.
Well above the guideline level
We'll walk you through the reading right away so you can start learning about your options. Any decision about mitigation should rest on your long-term result.
Your laboratory report gives your home's average radon level, which is compared with Health Canada's guideline of 200 Bq/m³ (becquerels per cubic metre). We'll walk you through what your number means.
Below 200 Bq/m³
The health risk is small, but no level of radon is considered risk-free. Lower is always better, and you can still choose to reduce it. If less than 91 days of your test fell in the heating season, Health Canada suggests retesting next heating season.
Above 200 Bq/m³
Health Canada recommends reducing radon in your home within one year. We offer radon mitigation and can talk you through your options.
Well above 200 Bq/m³
The higher the level, the sooner Health Canada recommends taking action. Mitigation should bring radon down as low as reasonably achievable, and a follow-up test confirms it worked.
Source: Health Canada, Guide for radon measurements in homes (opens in a new tab)
We set up a Wi-Fi connected continuous radon monitor in your home, on loan for a full year, and send you a report every month so you can follow how your radon levels change through the seasons. At the end of the year, we pick the monitor up.
Equipment: Ecosense EcoGuard continuous radon monitor, on loan
Good to know
The test Health Canada recommends for understanding your home's average radon level. We place a long-term detector, collect it after at least 91 days, arrange laboratory analysis and walk you through the result.
Good to know
We offer radon mitigation. Contact us to talk through your result and your options.
Good to know
Tell us about your home and we'll arrange both tests in one visit. A short phone or email conversation is free, and there's no obligation.
