Verdict: 4.5 / 5
Best radon monitor if you also want whole-home air quality
~$230
No subscription
The Airthings Wave Plus is the monitor we recommend when you want accurate radon plus a full picture of your indoor air—CO2, VOCs, humidity, temperature and pressure in one device. Its radon accuracy matches the RadonEye RD200; you pay more for the extra sensors and the app ecosystem.
Check Price on Amazon →At a glance
| Measures | Radon, CO2, VOCs, humidity, temp, pressure |
| Radon accuracy | ±10%, EPA-recognized |
| First reading | ~24 hours (reliable after 7 days) |
| Display | Color halo (wave hand); readings in app |
| Connectivity | Bluetooth; Wi-Fi via optional Hub |
| Power | 2x AA (~16 months) |
| Price | ~$230 |
Radon accuracy
For radon, the Wave Plus is rated to about ±10% at typical indoor levels and is recognized under EPA measurement protocols. Once acclimated for about a week, it tracks within roughly 5–15% of professional lab tests— essentially the same radon accuracy as the RadonEye RD200. The difference between the two isn't accuracy; it's everything else the Wave Plus measures.
If you're still deciding whether home monitors can be trusted at all, see are radon detectors accurate?
More than radon: the full sensor suite
The Wave Plus is the Airthings model with a CO2 sensor, and that's its real appeal. Alongside radon it tracks carbon dioxide (a strong proxy for stuffy, under-ventilated rooms), total VOCs, humidity, temperature and air pressure. For anyone managing allergies, sleep quality, or an older, tightly-sealed home, that broader picture is genuinely useful—and it's what separates the Wave Plus from radon-only monitors.
Pros & cons
Pros
- ✓ ±10% radon accuracy, EPA-recognized
- ✓ Also tracks CO2, VOCs, humidity, temp, pressure
- ✓ Polished app with history and smart-home support
- ✓ ~16 months on 2 AA batteries
- ✓ Quick color-halo status with a hand wave
Cons
- ✕ Pricier than radon-only monitors (~$230)
- ✕ No numeric display on the device—needs the app
- ✕ Wi-Fi/remote access requires the separate Airthings Hub
- ✕ Slower first reading (~24h) than the RadonEye RD200
How it compares
Against the RadonEye RD200, radon accuracy is a wash—both are ±10%. The RD200 is cheaper and faster for radon; the Wave Plus justifies its price only if you value the extra air-quality sensors. See the full RadonEye vs. Airthings comparison, the Wave Plus vs. Mini vs. Corentium breakdown, or our overall best radon detectors guide.
Who should buy the Wave Plus?
Buy it if…
You want one device that monitors radon and overall air quality (CO2, VOCs, humidity), a refined app, and smart-home integration—ideal for allergy sufferers, newer airtight homes, or anyone who wants the full picture.
Skip it if…
You only care about radon—the RadonEye RD200 gives the same radon accuracy for less. On a tight budget, see our budget picks under $200.
Airthings Wave Plus
Accurate radon plus full air-quality monitoring, no subscription.
Check Price on Amazon →Frequently Asked Questions
Is the Airthings Wave Plus accurate?
Yes. It measures radon to about ±10% at typical indoor levels and is EPA-recognized, tracking within roughly 5–15% of lab tests after about a week—on par with the RadonEye RD200. The Wave Plus just adds several other air-quality sensors.
Airthings Wave Plus vs RadonEye RD200: which should I buy?
Both are ±10% for radon. Pick the Wave Plus (~$230) for whole-home air quality (CO2, VOCs, humidity, temp, pressure); pick the RD200 (~$175) for radon-only with faster readings and a lower price.
Does the Wave Plus need Wi-Fi or the app?
You need the free app (Bluetooth) to see numbers, since there's no numeric screen—waving your hand shows a green/yellow/red halo. Wi-Fi and remote access require the separate Airthings Hub. No subscription.
What does it measure besides radon?
Radon plus CO2, total VOCs, humidity, temperature and air pressure. It's the Airthings model with a CO2 sensor, which is why it costs more than the Wave and Wave Mini.
Is the Airthings Wave Plus worth it?
If you want ongoing insight into overall air quality—not just radon—yes, and it runs ~16 months on two AA batteries. If radon is your only concern, the RadonEye RD200 gives the same radon accuracy for less.