C-NRPP Approved Radon Detectors: The Full List

Six consumer-grade electronic radon monitors have been through C-NRPP performance testing in Canada: the Airthings Corentium Home, Airthings View, Aranet RN+, Ecosense EcoQube, Ecosense RadonEye and SunRadon Lüft. All six passed. C-NRPP's own conclusion is that every device tested "demonstrated acceptable performance to be recommended by C-NRPP (an average performance grade of B or better)".

There is an important catch, and almost nobody selling these devices mentions it: being on this list does not make a device acceptable for professional radon measurement. More on that below, because it is the part that trips people up during a house sale.

What C-NRPP is

The Canadian National Radon Proficiency Program is Health Canada's designated certification body for radon measurement and mitigation in Canada. It certifies the professionals who test and fix homes, and it maintains guidance on the consumer devices homeowners buy for themselves.

It is a Canadian body applying Canadian conditions to the Canadian guideline level of 200 Bq/m³, which makes it more relevant here than American or European testing.

The six devices, and what each claims

These are the manufacturer accuracy claims as recorded in C-NRPP's report.

Airthings Corentium Home

±10% after 7 days at 200 Bq/m³, ±5% after two months. Displays 12 hour, 24 hour and 7 day averages on the device, with the first reading after 24 hours. Battery-powered, no app required. Around $180 and the most commonly bought monitor in Canada.

Airthings View

±10% on the 7 day average and ±5% on the 2 month average, after 30 days at 200 Bq/m³. Hourly readings, short-term average on the display and long-term history in the app. Runs on battery or USB-C. Sold at retail as the Airthings View Radon.

Aranet RN+

±8% on 24 hour, 7 day and 30 day averages, the tightest published figure of the six. The display window is user-selectable between 10 minutes, 24 hours, 7 days and 30 days. Battery-powered. Around $340.

Ecosense EcoQube

±10% at 370 Bq/m³ after ten hours. Measures every ten minutes and shows an hourly rolling average on an LED display, with detail in the app. Plug-in only.

Ecosense RadonEye

±10% at 370 Bq/m³ after ten hours, same as the EcoQube, with an OLED display instead. Plug-in only. The fastest route to a usable reading of the six.

SunRadon Lüft

±10% after 7 days at 200 Bq/m³. Hourly readings with the first at 90 minutes, colour-coded status on the device and full data in the app. Plug-in only. Harder to buy from Canadian retailers than the other five.

How the testing worked

C-NRPP's 2024/25 consumer monitor performance report, published in May 2025, put the devices through four rounds at the Radiation Safety Institute of Canada's National Radon Chamber:

• Round 1, winter conditions: 218 Bq/m³, 23 °C, 28% relative humidity
• Round 2, summer conditions: 210 Bq/m³, 29 °C, 70% relative humidity
• Round 3, elevated: 436 Bq/m³, 23 °C, 36% relative humidity
• Round 4, high: 1,201 Bq/m³, 23 °C, 35% relative humidity

Each ran for seven days. Two rounds sit near 200 Bq/m³ deliberately, because that is the level Canadians make mitigation decisions at, so accuracy there matters more than accuracy at extremes.

Devices were scored on measurement error, which combines accuracy and precision, and graded A through E. Grade E is a measurement error above 40%.

Most rounds came back A. The exception worth knowing about is Round 2, the humid one. At 70% relative humidity, roughly a Canadian summer basement, grades slipped relative to the drier rounds. If your basement runs damp, that round tells you more than the headline figure does.

What approval does not mean

This is the part worth reading twice if you are buying for a specific reason.

C-NRPP states plainly that these consumer devices "cannot be professionally calibrated and are not approved by C-NRPP for use by radon measurement professionals". A separate list of approved professional devices exists, and none of the six above are on it.

In practice:

• Buying or selling a house? A consumer monitor reading will not satisfy a lawyer, a lender or a buyer's inspector. You need a certified professional measurement.
• Just had mitigation installed? Your own monitor is great for watching the number fall, but post-mitigation verification is a professional job.
• Landlord or tenant dispute? Consumer readings are indicative, not evidence.
• Just want to know if your family is breathing something dangerous? Any of the six will tell you, and that is exactly what they are for.

Our guide to radon and real estate covers the transaction side, and you can find a certified professional when you need a measurement that counts.

A monitor may not be your cheapest first step

If you have never tested at all, a mail-in alpha track kit at $30 to $60 gives you a lab-analysed long-term average, which is the number Health Canada guidance is built around. It costs a fraction of a monitor and answers the first question properly.

Electronic monitors earn their money when you want to watch levels over time, understand seasonal swings or confirm a fix worked. Our DIY testing versus hiring a professional guide compares the approaches, and the DIY testing page lists kits alongside monitors.

The rule that matters more than the device

Every device on this list is accurate enough. The common mistake is not buying the wrong monitor, it is reading it too early.

Radon swings with weather, soil moisture and how sealed your house is. A quiet week in October can look nothing like January. C-NRPP recommends leaving a monitor in place at least three months, ideally through the heating season, and deciding on the long-term average.

Health Canada recommends acting on a long-term average above 200 Bq/m³, sooner the higher it goes. What the number means in practice is covered in how to interpret your radon test results.

For prices, availability and which of the six suits which situation, see Best Radon Detectors in Canada 2026.