Winner
Updated October 2026
Data from the official AirGradient and Airthings sites.
2026 verdict
Breadth of sensing favors the AirGradient ONE in this comparison, ahead of the Airthings Wave Plus.
The AirGradient ONE reports PM0.3, PM1, PM2.5 and PM10 particulates plus CO2, TVOC and NOx on a wired USB-C unit with a built-in OLED screen and native Home Assistant integration. The Airthings Wave Plus stays in the fight with six sensors in one, including radon, which the AirGradient lacks, on top of a five-year warranty against one year, Google Home, Alexa and Home Assistant support, and complete temperature, humidity and air quality alerts. Pick the AirGradient ONE for the widest particulate and gas suite in a Home Assistant setup, and the Airthings Wave Plus if you need continuous radon monitoring and broader voice-assistant reach.
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| Feature | AirGradient ONE | Airthings Wave Plus | Winner |
|---|---|---|---|
| Price | $230.00 | $249.99 | AirGradient ONE |
| Warranty | 1 year | 5 years | Airthings Wave Plus |
| Screen | YES | NO | AirGradient ONE |
| Integrations | Home Assistant | Google Home, Alexa, Home Assistant | Airthings Wave Plus |
| Sensors | TVOC, PM0.3, PM1, PM2.5, PM10, CO2, NOx, Temperature, Humidity | TVOC, CO2, Radon, Temperature, Humidity, Atmospheric Pressure | AirGradient ONE |
| Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Airthings Wave Plus |
| Weather Resistance | NO | NO | Tie |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Bluetooth, Other | Tie |
What the differences mean
Radon
The Airthings Wave Plus measures radon, the radioactive gas that is the top cause of lung cancer in non-smokers, and can validate or track a mitigation system. The AirGradient ONE has no radon sensor at all, so if radon is why you are shopping, only one of these does the job.
Particulates
The AirGradient ONE reports particulates at PM0.3, PM1, PM2.5 and PM10, covering everything from ultrafine combustion particles up to the coarser dust and pollen that irritate the nose. The Airthings Wave Plus has no particulate sensor, so it cannot see smoke, dust or pollen at all.
Wired or battery
The AirGradient ONE is a wired USB-C desk unit, while the Airthings Wave Plus runs on two AA batteries for about 1.5 years and can be moved between rooms and floors. One stays put, the other travels.
Smart home reach
The Airthings Wave Plus works with Google Home, Alexa and Home Assistant and sends temperature, humidity and air quality alerts. The AirGradient ONE integrates only with Home Assistant, with no voice assistant, HomeKit, SmartThings or Matter support.
Display and warranty
The AirGradient ONE has a built-in 1.3 inch OLED screen for at-a-glance readings, which the Airthings Wave Plus lacks. The Airthings turns that around with a five-year warranty against one year for the AirGradient.
Which one to buy if
- you want to monitor particulates for allergies or wildfire smoke
The AirGradient ONE reports PM0.3, PM1, PM2.5 and PM10, while the Airthings Wave Plus has no particulate sensor.
- you need to measure radon in a basement or crawlspace
The Airthings Wave Plus includes a radon sensor and can track a mitigation system; the AirGradient ONE has none.
- your home is controlled through Alexa or Google Home
The Airthings Wave Plus supports Google Home and Alexa as well as Home Assistant, while the AirGradient ONE is Home Assistant only.
- you want a desk unit with its own screen
The AirGradient ONE has a built-in OLED screen and runs on USB-C, so readings are visible without a phone or bridge.
- you want the longest warranty
The Airthings Wave Plus carries a five-year warranty against one year for the AirGradient ONE.
Winner
$230.00
- + Price: $230.00
- + Screen: YES
- + Sensors: TVOC, PM0.3, PM1, PM2.5, PM10, CO2, NOx, Temperature, Humidity
- - Warranty: 1 year vs 5 years
- - Integrations: Home Assistant vs Google Home, Alexa, Home Assistant
$249.99
- + Warranty: 5 years
- + Integrations: Google Home, Alexa, Home Assistant
- + Alerts: Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts
- - Price: $249.99 vs $230.00
- - Screen: NO vs YES
What owners say
Owners of the Airthings Wave Plus talk about getting six measurements in one good-looking, battery-powered unit, with radon alongside CO2, VOCs, temperature, humidity and pressure. They describe the VOC and CO2 readings as responsive, visibly changing when they sweep the floor, open a window or carry in boxes from storage, and many credit it with revealing a radon problem and justifying a mitigation system. The clean app and web dashboard with history from day one, the wave-to-check Good, Fair, Poor light and the magnetic mount all earn praise. The recurring complaints are that it is Bluetooth-only, so a hub is needed for continuous and remote data, that the app syncs slowly, and that its radon precision is debated against lab kits.
Frequently Asked Questions
Which is better overall: AirGradient ONE or Airthings Wave Plus?
The AirGradient ONE wins on sensor breadth for particulates and gases, with PM0.3, PM1, PM2.5, PM10, CO2, TVOC and NOx. The Airthings Wave Plus is the better pick if you need radon, a longer warranty, or Google Home and Alexa support alongside Home Assistant.
What is the biggest difference between the AirGradient ONE and the Airthings Wave Plus?
The sensor sets point in opposite directions. The AirGradient ONE is built around particulates and gases (PM0.3 to PM10, CO2, TVOC, NOx), while the Airthings Wave Plus adds radon and pressure but has no particulate sensor whatsoever.
Does the AirGradient ONE measure radon?
No. The AirGradient ONE has no radon sensor, and it has no carbon monoxide sensor either. The Airthings Wave Plus is the one of this pair that measures radon, alongside CO2, VOCs, temperature, humidity and pressure.
Does the Airthings Wave Plus measure particulates like PM2.5?
No. The Airthings Wave Plus does not have a particulate sensor, so it cannot read PM2.5, PM10 or smoke. The AirGradient ONE is the one that reports particulates, from PM0.3 up to PM10.
Which works with Alexa or Google Home?
Only the Airthings Wave Plus, which supports Google Home and Alexa as well as Home Assistant and IFTTT. The AirGradient ONE integrates with Home Assistant only and has no voice-assistant support.
Who should buy the Airthings Wave Plus?
Homeowners concerned about radon in a basement or crawlspace, anyone tracking a mitigation system, and buyers who want six sensors in one and control through Google Home or Alexa.
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