The consumer radon monitor on C-NRPP's approved list
The Corentium Home is on C-NRPP's approved consumer radon monitor list — the independent Canadian evaluation that also flags the inaccurate imported monitors Health Canada has recalled. If you've been searching for a digital radon detector for your home, this is the approved way to do it. Manufacturer-stated accuracy: ±10% after 7 days at 200 Bq/m³, ±5% after two months. Big-box price: $179.99–$213.37 (July 2026) — $169.99 here with free Canadian shipping, and $149.99 for kit buyers. Every standalone monitor order also includes a $10 credit toward your next lab-analyzed test.
A monitor watches. A test certifies.
We sell both, because they do different jobs. Radon swings day to day — Health Canada's guidance is a long-term test of 3+ months, and short readings can mislead in either direction. The monitor is for awareness: watch the seasons, check the basement reno, confirm your mitigation system keeps working. When you need a number you can act on — or a document a buyer, builder or Tarion will accept — that's the lab-analyzed test kit and its Certificate of Analysis.
Pair them and you're covered both ways: the monitor is $149.99 with any premium kit — and it ships free in your kit's courier box.
What's included
- Airthings Corentium Home digital radon monitor (Canadian Bq/m³ version)
- 3 × AAA batteries
- Quick-start guide
- Free shipping when ordered with a premium (courier) test kit
Where to place your radon monitor
Same rules as a test kit: lowest lived-in level, normal breathing height, away from drafts, exterior walls and humidity. Full walkthrough: Health Canada radon testing guidance.
Corentium Home specs, warranty & support
- 5-year manufacturer warranty — register with Airthings within 30 days of purchase (your RadonTest order confirmation is your proof of purchase; the serial number is on the back of the unit)
- Detection: passive diffusion chamber (alpha spectrometry) — no calibration needed
- Display: 12-hour, 24-hour, 7-day and long-term averages, in Bq/m³
- Measurement range: 0–9999 Bq/m³
- Operating range: 4°C to 40°C, relative humidity below 85%
- Power: 3 × AAA (included), approx. 2-year battery life
- Size: 120 × 69 × 25.5 mm · 130 g
- Full details: official specification sheet (PDF) · Airthings product support
Frequently asked questions
Does this replace a radon test kit?
No. Health Canada recommends a long-term test of at least 3 months, and lab-analyzed results are what real-estate transactions, builders and warranty claims rely on. The monitor is for continuous awareness between and after tests. That's why we sell both.
How accurate is the Corentium Home?
Manufacturer-stated: ±10% after 7 days at 200 Bq/m³, ±5% after 2 months. It's on C-NRPP's approved consumer monitor list — many cheap imported monitors are not, and several have been recalled by Health Canada.
Does it need an app or Wi-Fi?
No. Everything shows on the built-in display; 3 AAA batteries included. Canadian version, reads in Bq/m³.
Why is it cheaper with a premium test kit?
Ordered together, they travel in one courier box — one shipment instead of two, and we pass the saving on. It's also how Health Canada's guidance actually gets followed: watch continuously, certify with the lab test.
Is there a warranty?
Yes — a 5-year manufacturer warranty from Airthings. Register within 30 days of purchase on the Airthings warranty page; you'll need your RadonTest order confirmation (proof of purchase) and the serial number on the back of the unit. We include a reminder in your order email.
My monitor and a lab test show different numbers — which is right?
Both can be true at once. A lab-analyzed test gives a certified long-term average — the official number for real-estate transactions, builders and warranty claims. A monitor shows shorter-window estimates that swing above and below that average as conditions change day to day. Use the monitor to watch; the lab Certificate of Analysis is your official result.