Airthings View Plus vs Corentium Home 2: The Best Radon Detectors

If you’re looking for the best radon detector in 2025, there are two Airthings devices that stand clearly above the rest: the View Plus and the Corentium Home 2. Both are significant upgrades over their predecessors, and either one will give you accurate, reliable radon data that can meaningfully protect your family’s health. The question isn’t whether they work — they do. The question is which one fits your home and your habits.

This guide breaks down both devices in plain terms, with real specs, honest comparisons, and a clear recommendation at the end.

Why These Two Devices Represent a New Generation of Radon Monitoring

Airthings has been making consumer radon monitors longer than almost anyone — the original Corentium Home became one of the most trusted devices in the category worldwide, with hundreds of thousands of units sold over the past decade. The View Plus and Corentium Home 2 aren’t just iterative updates. They represent what’s possible when a company applies a decade of real-world sensor data to redesigning its flagship products from the ground up.

The Corentium Home 2 takes the proven accuracy of the original and adds Bluetooth connectivity, a redesigned body, and app-powered insights without changing what made the original work. The View Plus is the most comprehensive consumer air quality monitor on the market — seven sensors, an e-ink display, Wi-Fi, and enough data to give you a complete picture of everything you’re breathing indoors, with radon at the center.

Both are HSA/FSA-eligible through Airthings’ new partnership with Truemed — which means you may be able to use pre-tax healthcare dollars to pay for either device.

Airthings Corentium Home 2: The Trusted Radon Detector, Smarter Than Ever

The Corentium Home 2 ($179.99) is built on the same measurement foundation as the original — a silicon PIN photodiode detector that counts alpha particle emissions from radon decay. That sensor technology has been validated by hundreds of thousands of homeowners and certified to NSF/ANSI Standard 269. The difference with the second generation is what happens after the device takes a reading.

What’s new and better in the Corentium Home 2:

• Bluetooth connectivity — syncs with the Airthings app to deliver a full dashboard of radon history, trend graphs, and personalized insights
• Temperature and humidity sensors — especially useful in basements and crawl spaces where moisture correlates with radon movement
• Redesigned body — more compact, better grip, cleaner display that’s easy to read at a glance
• Smarter app insights — the Airthings app translates your radon number into plain-language guidance: what it means, whether to act, and what to do next

The display still shows you current level, 24-hour average, and long-term average directly on the device — no phone needed for a quick check. But now, when you want the full picture, the app gives you weeks of historical data in a color-coded graph that makes it easy to spot seasonal trends or post-renovation spikes.

Who the Corentium Home 2 is for:

• Homeowners who want straightforward, reliable radon monitoring without complexity
• Buyers who tested with the original Corentium and want the smarter upgrade
• Anyone monitoring a basement, first floor, or specific room where radon is a known concern
• People who want portability — the Corentium Home 2 can move between rooms or floors easily

Airthings View Plus: The Most Comprehensive Home Air Quality Monitor You Can Buy

The View Plus ($329.99) is Airthings’ flagship device, and it earns that title. It monitors seven indoor air quality factors simultaneously: radon, PM2.5, CO₂, VOCs, humidity, temperature, and air pressure. No other consumer device at this price point tracks all of them together — and the way the View Plus presents that data is what separates it from generic multi-sensor monitors.

What makes the View Plus exceptional:

• Seven sensors in one device — radon, PM2.5, CO₂, VOCs, humidity, temperature, air pressure
• E-ink display — shows up to four values you choose, always readable, never needs backlight
• Motion-activated indicator — glows green/yellow/red so you can read overall air quality across the room at a glance
• Wi-Fi + USB-C — connects directly to your home network; plug it in and it becomes a hub for all your other Airthings Wave devices
• Actionable insights — the app doesn’t just show you numbers; it turns them into plain-language steps: “Open windows for 20 minutes” or “Run your air purifier”
• Calm Tech Certified™ — designed to inform without demanding your attention or generating anxiety
• Amazon Alexa, Google Assistant, and IFTTT compatible
• AA batteries or USB-C — your choice of power mode

The View Plus meets NSF/ANSI Standard 269 for radon measurement accuracy, so its radon data is just as trustworthy as a dedicated radon monitor — it’s not a trade-off. You’re getting radon monitoring that’s equal to the best standalone detectors, plus six more sensors on top.

Why radon + air quality together matters:

Most of us don’t think about CO₂ and VOCs until someone points out that the headache you get every Sunday afternoon is correlated with your weekly cleaning routine and closed windows. The View Plus makes those invisible connections visible. High CO₂ makes you drowsy and affects cognitive performance long before it’s dangerous. PM2.5 from cooking, candles, or outdoor pollution enters your lungs and bloodstream. VOCs from furniture, paint, and adhesives accumulate in poorly ventilated rooms. Radon is the most dangerous of the lot — but it’s not the only thing worth knowing.

Who the View Plus is for:

• Homeowners who want the most complete picture of indoor air quality available
• Families who want one device that covers all the major air quality risks under one roof
• Tech-forward households who enjoy dashboards, trends, and data-driven decisions
• Anyone who wants their Airthings radon monitors integrated into a single hub
• New home buyers, renovators, or people in high-radon zones who want premium protection

Side-by-Side Comparison

Feature	Airthings View Plus	Airthings Corentium Home 2
Price	$329.99	$179.99
Radon Sensor	✅ Alpha particle detection	✅ Alpha particle detection
NSF/ANSI 269 Certified	✅ Yes	✅ Yes
PM2.5	✅ Yes	❌ No
CO₂	✅ Yes	❌ No
VOCs	✅ Yes	❌ No
Humidity	✅ Yes	✅ Yes
Temperature	✅ Yes	✅ Yes
Air Pressure	✅ Yes	❌ No
Display	E-ink (shows 4 values)	Digital LCD
Motion indicator	✅ Green/yellow/red LED	✅ Green/yellow/red LED
Connectivity	Wi-Fi + Bluetooth	Bluetooth
Power	AA batteries or USB-C	AA batteries
App integration	✅ Full Airthings App	✅ Full Airthings App
Hub function	✅ Yes (for Wave devices)	❌ No
Smart home	Alexa, Google, IFTTT	❌ No
Portability	Wall/surface (stationary)	Handheld, portable
HSA/FSA eligible	✅ Yes	✅ Yes

Accuracy: Are They as Good as Dedicated Radon Testers?

Yes — and this is a question worth answering directly, because it matters. Both devices use alpha particle detection, the same physical principle used in professional radon monitors. Both are certified to NSF/ANSI Standard 269, which sets accuracy requirements for continuous radon monitors in the United States.

Accuracy within ±10–15% under normal residential conditions is typical for both devices — sufficient for the most important decision you’ll make with the data: whether you’re above or below the EPA action level of 4.0 pCi/L. The View Plus hourly readings allow you to see trends and correlate spikes to specific activities or weather. The Corentium Home 2’s 1-day, 7-day, and 30-day averages give you the long-term picture that’s most relevant for health risk assessment.

Note: For real estate transactions, neither device replaces a short-term certified test conducted by a licensed radon measurement professional. Both are ideal for ongoing home monitoring.

The Airthings App: What You Get With Both Devices

Both the View Plus and Corentium Home 2 connect to the free Airthings app (iOS and Android). Once connected, you get:

• Real-time readings for all sensors on the device
• Historical graphs — 24h, 7d, 30d, and 1y views
• Color-coded status — instant visual read on safe, elevated, or action-needed
• Personalized insights — plain-language recommendations based on your actual data
• Push notifications — alerts when radon or other values cross your set thresholds
• Data export — download your readings for records or sharing with a mitigator

The app is genuinely good — not a bolted-on afterthought. Airthings has invested in making the data interpretable by people who aren’t air quality scientists, which is the right approach for a consumer product.

What to Do When Your Radon Level Is High

Knowing your radon level is only half the job. Here’s the quick decision framework:

• Below 2.0 pCi/L — You’re well below the EPA action threshold. Continue monitoring seasonally, as levels can change.
• 2.0–4.0 pCi/L — The EPA recommends considering mitigation, especially in frequently occupied rooms or sleeping areas. It’s worth getting a professional assessment.
• Above 4.0 pCi/L — The EPA recommends action. Contact an NRPP-certified radon mitigation professional. Sub-slab depressurization systems typically cost $800–$2,500 and reduce radon by 50–99%.
• Above 8.0 pCi/L — Act promptly. At this level, the cancer risk from long-term exposure is significant and well-documented.

The national average indoor radon level in the US is 1.3 pCi/L. Any reading above 4.0 pCi/L puts you in roughly the top 6% of US homes — and the fix is available, affordable, and highly effective.

Which One Should You Buy?

Buy the Corentium Home 2 if:

• Radon is your primary concern and you want a purpose-built, proven detector
• You value portability — move it between floors, test different rooms
• You want great radon monitoring at a more accessible price point
• You prefer simplicity with optional smart features when you want them

Buy the View Plus if:

• You want the most complete picture of your home’s air quality available today
• You’re investing in long-term air quality awareness across multiple pollutants
• You want a Wi-Fi-connected hub that integrates with your smart home setup
• You have or are considering other Airthings Wave devices

Both are excellent. Either purchase is a smart investment in your family’s long-term health. Radon is the second leading cause of lung cancer in the United States — responsible for approximately 21,000 deaths per year — and both of these devices give you the accurate, ongoing data you need to know if your home has a problem and confirm that your mitigation is working.

Where to Buy

• Airthings View Plus ($329.99) → airthings.com/view-plus
• Airthings Corentium Home 2 ($179.99) → airthings.com/corentium-home-2

Both are available directly from Airthings with free shipping, and both qualify for HSA/FSA reimbursement via Truemed.

Frequently Asked Questions