Airthings Corentium Home Radon Detector — The Odourless Thing in Your Basement Worth Measuring! $169.99 CAD

Amazon.ca has the Airthings Corentium Home radon detector (international version, readings in Bq/m³) at $169.99 CAD, down from the usual $179.99. Free shipping for Prime members; otherwise free over $35.

Radon is the easiest thing in a Canadian home to ignore: colourless, odourless, seeping in from the soil and foundation, and climbing every winter once the windows close. Health Canada recommends every household test once, and most people never get around to it — the traditional kit means mailing a sample to a lab, waiting weeks, and paying a lab fee.

This detector shortens that loop. Three AAA batteries, put it in the basement or the room you actually use, and there's a first reading within 24 hours. It measures by alpha spectrometry and shows 1-day, 7-day and rolling one-year averages — radon swings wildly day to day, so the long-term number is the one that matters. No outlet, no WiFi, no subscription, which is why radon mitigation contractors recommend it.

3,012 reviews at 4.6 stars. One owner ran it side by side with a second meter for four weeks and found them consistent; another says this is what revealed elevated radon in their basement and prompted a mitigation system. Someone else appreciates that it works without a WiFi account.

Check the version before ordering: this is the international model reading in Bq/m³, which is the unit used in Canada, so no conversion needed. If you only want a rough one-time check, a $40 single-use kit will do it. But for a house with a basement, kids, or long-term plans, a meter you can read any time beats buying kits over and over.

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