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Air Quality Monitors · Head to head

Airthings Wave Plus vs Aranet4 HOME

Full Smart Air Quality Monitors comparison in 2026

Updated September 2026
Data from Amazon and official Airthings and Aranet sites.
2026 verdict
CO2 specialist versus radon-and-CO2 generalist: the Airthings Wave Plus is the more capable air quality monitor, because it adds radon and VOC sensing to the CO2 both measure.
Airthings Wave Plus
Winner
Airthings Wave Plus
$230.66$249.998% OFF
Buy on Amazon USACheck price
It also works with Google Home and Alexa on top of Home Assistant and carries a 5-year warranty against 2. The Aranet4 HOME fights back with an E-Ink screen the Airthings Wave Plus lacks, a battery rated for 4 years against 1.5 on the same two AA cells, and a compact, pocketable body that owners take travelling. Both track CO2, temperature, humidity and air pressure over Bluetooth only. Buy the Airthings Wave Plus for a home that needs radon monitoring, and the Aranet4 HOME if CO2 and ventilation are the whole point.
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FeatureAirthings Wave PlusAranet4 HOMEWinner
Price$230.66€199.00Aranet4 HOME
Rating4.24.7Aranet4 HOME
Warranty5 years2 yearsAirthings Wave Plus
Battery Life1.5 years4 yearsAranet4 HOME
ConnectivityBluetooth, OtherBluetoothAirthings Wave Plus
ScreenNOYESAranet4 HOME
IntegrationsGoogle Home, Alexa, Home AssistantHome AssistantAirthings Wave Plus
SensorsTVOC, CO2, Radon, Temperature, Humidity, Atmospheric PressureCO2, Temperature, Humidity, Atmospheric PressureAirthings Wave Plus
Weather ResistanceNONOTie
AlertsTemperature Alerts, Humidity Alerts, Air Quality AlertsTemperature Alerts, Humidity Alerts, Air Quality AlertsTie

What the differences mean

Radon and VOCs

The Airthings Wave Plus measures radon and TVOC; the Aranet4 HOME measures neither. In a basement or a radon-prone area, that alone decides it, since the Aranet4 HOME cannot warn you about radon at all.

Screen

The Aranet4 HOME shows CO2 and the rest on an always-on E-Ink screen. The Airthings Wave Plus has no screen, just a light you wave at for good, fair or poor, so the numbers live in the app.

Battery life and portability

Both use two AA batteries, rated for 4 years in the Aranet4 HOME and 1.5 years in the Airthings Wave Plus. The Aranet4 HOME is also the smaller and lighter of the two, at 104 g, which makes it the one people carry to the office or on trips.

Smart home

The Airthings Wave Plus works with Google Home, Alexa and Home Assistant. The Aranet4 HOME connects to Home Assistant only.

Which one to buy if

What owners say

Owners of both monitors use them to understand ventilation, watching CO2 climb in a closed room and fall when a window opens, and both groups mention Bluetooth only as the main limit. Aranet4 HOME owners call its CO2 readings the most trustworthy they have used, close to reference instruments, and praise the crisp E-Ink display, years of battery and a size that travels, while noting a few minutes to settle after moving and an occasional one-time calibration. Airthings Wave Plus owners value getting radon and VOCs in the same unit, several crediting it with confirming a radon problem, and complain about slow, flaky syncing and radon readings some found lower than charcoal lab kits.

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
  • Aranet4 HOME

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Frequently Asked Questions

Airthings vs Aranet: which is better, the Airthings Wave Plus or the Aranet4 HOME?

The Airthings Wave Plus overall, because it adds radon and VOC sensing, Google Home and Alexa support and a 5-year warranty. The Aranet4 HOME is the better pure CO2 monitor, with an E-Ink screen and a battery rated for 4 years.

What is the biggest difference between the Airthings Wave Plus and the Aranet4 HOME?

Radon. The Airthings Wave Plus measures radon, VOCs, CO2, temperature, humidity and pressure, while the Aranet4 HOME measures CO2, temperature, humidity and pressure and no radon.

Does the Airthings Wave Plus or the Aranet4 HOME have a display?

Only the Aranet4 HOME, which has an always-on E-Ink screen. The Airthings Wave Plus shows a good, fair or poor light when you wave at it and keeps the readings in its app.

Who should buy the Airthings Wave Plus?

Homeowners who want radon, CO2 and VOCs in one battery-powered unit and use Google Home, Alexa or Home Assistant.

Who should buy the Aranet4 HOME?

Anyone focused on CO2 and ventilation who wants accurate readings on a screen, years of battery life and a monitor small enough to carry, and who does not need radon.

Full comparison table

Compare all 32 Air Quality Monitors side by side

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