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Air Quality Monitors · Head to head

Airthings Wave Plus vs Amazon Smart Air Quality Monitor

Full Smart Air Quality Monitors comparison in 2026

Updated October 2026
Data from Amazon and official Airthings site.
2026 verdict
For a homeowner who wants radon and CO2 tracked in one device, the Airthings Wave Plus is the stronger air quality monitor of this pair.
Airthings Wave Plus
Winner
Airthings Wave Plus
$199.99$249.9920% OFFPrime exclusive deal

Last recorded price

Buy on Amazon USA
It measures radon, CO2, VOCs, temperature, humidity and pressure, works with Google Home, Alexa and Home Assistant, alerts on temperature and humidity as well as air quality, and carries a 5-year warranty. The Amazon Smart Air Quality Monitor counters with PM2.5 and carbon monoxide, which the Wave Plus does not measure, always-on Wi-Fi and a lower price. It has no screen and is built around Alexa, where its readings can run routines directly. The Airthings Wave Plus runs on two AA batteries and connects over Bluetooth, so remote data needs an Airthings hub. Buy the Airthings Wave Plus for radon and ventilation, and the Amazon Smart Air Quality Monitor for particles and CO in an Alexa home.
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FeatureAirthings Wave PlusAmazon Smart Air Quality MonitorWinner
Price$199.99$46.99Amazon Smart Air Quality Monitor
Warranty5 years1 yearAirthings Wave Plus
IntegrationsGoogle Home, Alexa, Home AssistantAlexa, Home AssistantAirthings Wave Plus
SensorsTVOC, CO2, Radon, Temperature, Humidity, Atmospheric PressureTVOC, PM2.5, CO, Temperature, HumidityAirthings Wave Plus
AlertsTemperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery AlertsAir Quality AlertsAirthings Wave Plus
Rating4.24.2Tie
Weather ResistanceNONOTie
ConnectivityBluetooth, Other2.4 GHz WiFi, BluetoothTie
ScreenNONOTie

What the differences mean

Sensors

The Airthings Wave Plus measures radon, CO2, VOCs, temperature, humidity and pressure. The Amazon Smart Air Quality Monitor measures VOCs, PM2.5, carbon monoxide, temperature and humidity. Only the Wave Plus sees radon and CO2; only the Amazon sees fine particles and CO.

Power and connection

The Airthings Wave Plus runs on two AA batteries for about 1.5 years and connects over Bluetooth, with an Airthings hub needed for continuous online data. The Amazon Smart Air Quality Monitor plugs into Micro USB and stays on Wi-Fi, so it is always reachable but always near an outlet.

Platforms

The Airthings Wave Plus works with Google Home, Alexa and Home Assistant. The Amazon Smart Air Quality Monitor works with Alexa and Home Assistant, with no Google Home support.

Alerts

Both alert on poor air quality. The Airthings Wave Plus also alerts on temperature, humidity and low battery, which the Amazon Smart Air Quality Monitor does not.

Warranty

5 years on the Airthings Wave Plus against 1 year on the Amazon Smart Air Quality Monitor.

Which one to buy if

Winner
Airthings

Airthings Wave Plus

20% OFF
Prime exclusive deal
$199.99
$249.99

Last recorded price

Buy on Amazon USA
  • + Warranty: 5 years
  • + Integrations: Google Home, Alexa, Home Assistant
  • + Sensors: TVOC, CO2, Radon, Temperature, Humidity, Atmospheric Pressure
  • - Price: $199.99 vs $46.99

What owners say

Owners of both describe sensors that react to real life: sweeping, cooking, opening a window or lighting a candle shows up in the readings. Airthings Wave Plus owners single out getting six measurements in one battery-powered unit, a clean app and web dashboard with history from day one, and confirming a radon problem before paying for mitigation. They complain about slow, flaky syncing without a hub and radon readings that ran low against lab charcoal kits. Amazon Smart Air Quality Monitor owners praise plug-and-play setup and Alexa routines that run a purifier without a hub, and a few credit it with catching a CO leak. Their warnings are that it is useless without an Echo, the Alexa app has weak charts and no export, and threshold routines do not always fire.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Airthings Wave Plus
  • Amazon Smart Air Quality Monitor

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Frequently Asked Questions

Which is better overall: Airthings Wave Plus or Amazon Smart Air Quality Monitor?

The Airthings Wave Plus, for most homes. It measures radon, CO2, VOCs, temperature, humidity and pressure, works with Google Home, Alexa and Home Assistant and carries a 5-year warranty. The Amazon Smart Air Quality Monitor is the cheaper option for PM2.5 and CO in an Alexa home.

What is the biggest difference between the Airthings Wave Plus and the Amazon Smart Air Quality Monitor?

The sensor set. The Airthings Wave Plus covers radon and CO2, while the Amazon Smart Air Quality Monitor covers PM2.5 and carbon monoxide. Both measure VOCs, temperature and humidity.

Does the Airthings Wave Plus work with Amazon Alexa?

Yes. The Airthings Wave Plus works with Alexa, Google Home and Home Assistant. The Amazon Smart Air Quality Monitor works with Alexa and Home Assistant but not Google Home.

Does the Airthings Wave Plus need Wi-Fi or an outlet?

Neither. The Airthings Wave Plus runs on two AA batteries and connects over Bluetooth, with an Airthings hub for continuous online data. The Amazon Smart Air Quality Monitor needs both a Micro USB outlet and Wi-Fi.

Who should buy the Airthings Wave Plus?

Homeowners who want radon and CO2 in one battery-powered monitor, with temperature and humidity alerts and a long warranty, and who can add an Airthings hub for remote access.

Who should buy the Amazon Smart Air Quality Monitor?

Alexa households that want an affordable plug-in sensor for PM2.5, VOCs and carbon monoxide, with routines that react to it, and that do not need radon or CO2 readings.

Full comparison table

Compare all 32 Air Quality Monitors side by side

You are looking at two of them. The full table lines up all Air Quality Monitors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 32 Air Quality Monitors
  • 54 specs compared
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