Best Radon Detectors for Canadian Homes (2026): Tested and Compared
Search “best radon detector” and you’ll get 40 tabs of US reviews. Most of them rank devices you can’t buy here, or models that were never checked for Canadian homes.
So let’s fix that. This is a Canada-first list, with real prices in Canadian dollars.
Every model here is one you can buy on Amazon.ca or at Canadian Tire. And we’ll give you an honest take on when a $200 detector beats a $400 one.
The short version:
- A “radon detector” almost always means a continuous radon monitor (CRM). It reads radon hour by hour.
- For most homes, the Airthings Corentium Home ($200 to $260) is the simplest good pick.
- Want an app, Wi-Fi, and trend charts? The RadonEye RD200 or Airthings View do that for a bit more.
- A $200 monitor is plenty for home tracking. You don’t need to spend $400 unless you want extra features.
- No consumer detector is accepted for a real estate deal or a Tarion claim. Those need a calibrated pro test.
What “radon detector” actually means
The word covers two different things. It helps to know which one you’re shopping for.
A single-use test kit (charcoal or alpha track) sits in your basement, then goes to a lab. You get one number, once. We cover those in our radon test kit buyer’s guide.
A continuous radon monitor, or CRM, is the reusable gadget most people mean by “detector.” It reads the air all day, every day. No lab. No mailing. The screen or app shows you a live average.
This post is about that second group. The plug-in or battery devices you keep for years.
How a continuous radon monitor works
A CRM pulls room air across a small sensor. Inside, it counts the tiny bursts of energy that radon gives off as it decays. More bursts means more radon.
Most consumer monitors need about 24 hours for a first reading. They settle into a reliable average after about 7 days.
That settling time matters. A monitor’s “1-day” number can be noisy. Its 7-day and long-term numbers are the ones to trust.
The best radon detectors in Canada (2026)
All six models below are on the C-NRPP consumer device list for Canadian use.
Prices are approximate and shift with sales and exchange rates.
| Make and model | Price (CAD) | Power | App / Wi-Fi | Best for |
|---|---|---|---|---|
| Airthings Corentium Home | $200 to $260 | 3 AAA batteries | No app | Simplest pick. Set it and read the screen. |
| Ecosense RadonEye RD200 | $200 to $260 | Plug-in | App, Bluetooth | Fast updates, hourly data, big OLED screen. |
| Airthings View | $300 to $400 | Battery or USB-C | App, Wi-Fi | Charts, alerts, extra air sensors on some models. |
| Aranet RN+ | $220 to $280 | Battery | App, Bluetooth | Air-quality fans who want long battery life. |
| Ecosense EcoQube | $180 to $230 | Plug-in | App, Bluetooth | Cheapest listed monitor. Small and tidy. |
| SunRadon Luft | $200 to $260 | Plug-in | App, Wi-Fi | Color LED on the device plus app averages. |
Our pick for most homes: Airthings Corentium Home
It’s the most-recommended starter monitor in Canada for a reason. It runs on batteries, so you can move it room to room. The screen shows your short-term and long-term average with no phone needed.
No Wi-Fi. No app. For a lot of people, that’s a feature, not a flaw.
Why we trust it: it’s what we use. Breathe Radon Free runs every paid test on an Airthings Corentium device. The original Corentium Home (gen 1) when a customer wants a longer monitoring window, the newer Corentium Home 2 for our standard 3 to 7 day tests. We’re not paid by Airthings. It’s the one we trust enough to leave on a customer’s basement floor.
Best for data nerds: RadonEye RD200
If you like watching numbers, the RD200 updates faster than most and logs hourly readings to its app. The big screen is easy to read across a basement.
It’s plug-in, so it stays put. Great for one spot you want to watch closely.
Best for whole-home air tracking: Airthings View
The View line adds Wi-Fi, phone alerts, and (on some models) sensors for CO2, humidity, and other stuff. It costs more. You’re paying for the dashboard and the extra sensors, not better radon accuracy.
How accurate are home radon detectors?
Accurate enough to act on. Not accurate enough for paperwork.
A good consumer monitor, left in one spot for a week or more, gets you close to your home’s true average. That’s plenty to tell if you’re under 100 Bq/m³, in the 100 to 200 grey zone, or above Canada’s action guideline of 200 Bq/m³.
But here’s the gap a lot of buyers miss. Consumer detectors aren’t calibrated with a certificate. They drift a little over time.
That’s fine for tracking your own home. It’s not fine for a real estate deal, a Tarion warranty claim, or proof that your mitigation system worked. Those need a calibrated professional device.
A consumer monitor answers “should I worry?” A pro test answers “can I prove it?” Both have a job. They’re just different jobs. Don’t buy a $250 gadget expecting it to hold up in a home sale.
Consumer vs professional: the price gap is real
The Airthings Corentium Home you buy at the store and the Corentium Pro that certified Ontario testers use are different devices, despite the similar name.
| Consumer monitor | Professional monitor | |
|---|---|---|
| Price (CAD) | $180 to $400 | $1,800 to $2,200 |
| Calibration certificate | No | Yes, recalibrated yearly |
| Reports | Basic app summary | Audit-ready report |
| Accepted for real estate | No | Yes |
| Accepted for Tarion claims | No | Yes |
The 7x to 10x price jump pays for calibration you can trace and reports buyers, lenders, and Tarion will accept. For your own peace of mind, the consumer version is plenty.
DIY detector vs hiring a pro: when each makes sense
Most Ontario homeowners can start with a detector they buy themselves. Some can’t. Here’s the honest split.
When a detector you buy is plenty
You own your home. You’re curious. You want to know your level and watch it over time. You have no deadline.
Buy a Corentium Home or an RD200. Put it in the lowest level you spend time in. Read the long-term average after a few weeks. Done.
If the average is under 100 Bq/m³, you’re in good shape. If it creeps over 200, plan a follow-up.
When to skip the gadget and book a pro
A few situations need a certified test from the start.
- Buying a home. Your closing is two weeks out. You need a signed report in days, not a slow self-test.
- Selling a home. Buyers and inspectors want documentation, not a phone screenshot.
- Filing a Tarion claim. Tarion needs a certified measurement to trigger builder-paid mitigation.
A consumer detector won’t count. - Confirming mitigation worked. The verification test should come from someone independent of the installer.
We help Ontario homeowners through all of these. A residential pro test is $99 flat, and a faster real estate test is $399.
Tarion claim help is free for test customers. See our full pricing and services.
Where to buy a radon detector in Canada
Stock changes by season. November is Radon Action Month, when shelves get refreshed.
- Canadian Tire and Home Depot Canada carry the Corentium Home and a few others in store.
- Amazon.ca stocks all the models above, often with the widest price swings.
- Direct from the maker (Airthings, Ecosense) sometimes runs sales and bundles.
Before you buy, check the model against the C-NRPP consumer device list.
Some Ontario towns also hand out free or cheap test kits through Take Action on Radon programs.
Where to put your detector (this matters more than the model)
The best detector in the wrong spot gives you a useless number. Health Canada’s measurement guide spells out the rules.
- Test the lowest level you actually live in. A finished basement room, not the crawl space.
- Place it 80 cm to 2 m off the floor.
- Keep it 50 cm away from exterior walls, windows, vents, and doors.
- Don’t put it in a kitchen, bathroom, or laundry room. Humidity skews the read.
- Give it at least 7 days before you trust the average.
Winter readings run higher than summer because of the stack effect. If you test in July and land near the guideline, retest in the cold months too.
What your reading means
Your detector shows a number in Bq/m³ (Becquerels per cubic metre). Here’s the quick read.
- Under 100: You’re in good shape. Keep the monitor running and check it now and then.
- 100 to 200: Below the guideline, but not zero risk. Worth watching, especially with kids in a basement bedroom.
- 200 to 600: Above Canada’s guideline. Health Canada says fix within two years.
- Over 600: Fix within a year. No need to panic. The harm builds over decades, not days.
Radon is the leading cause of lung cancer for people who’ve never smoked in Canada.
Frequently asked questions
What’s the best radon detector for a Canadian home?
For most homes, the Airthings Corentium Home is the simplest reliable pick at $200 to $260. If you want an app and hourly data, the Ecosense RadonEye RD200 is a strong choice in the same price range. Both are on the C-NRPP consumer device list.
Is a $400 radon detector worth it over a $200 one?
Usually not for accuracy. The extra money buys Wi-Fi, phone alerts, charts, and sometimes other air sensors. For radon readings alone, a good $200 monitor does the job just as well.
Can I use a home radon detector for a real estate deal?
No. Consumer detectors aren’t calibrated with a certificate, so they’re not accepted for home sales, Tarion claims, or post-mitigation proof. Those need a calibrated professional test.
How long before a radon detector gives a real reading?
Most consumer monitors show a first number in about 24 hours. Trust the 7-day and long-term averages, not the first-day reading. Radon swings a lot day to day.
Do radon detectors expire or need calibration?
Consumer monitors are reusable for years and drift slowly. There’s no yearly recalibration like pro devices get. If a monitor is more than 7 to 10 years old, compare it against a fresh test to check it’s still honest.
Where should I put my radon detector?
In the lowest level you spend time in, 80 cm to 2 m off the floor, and at least 50 cm from windows, vents, and exterior walls. Keep it out of the kitchen, bathroom, and laundry room.
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Authored by the Breathe Radon Free Team. Every claim is backed by a primary source. Full bibliography at /sources.
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