Winner
Updated September 2026
Data from Amazon and official Airthings and Aranet sites.
2026 verdict
Radon and CO2 rarely meet in one comparison, and here the Airthings 325 Corentium Home 2 comes out ahead, winning on price, a 5-year warranty against 2, SmartLink connectivity and Google Home plus Alexa integrations.
The Aranet4 HOME has the better owner feedback, a rated battery life of 4 years against 3, and a wider sensor set covering CO2, temperature, humidity and pressure. Both use two AA cells and Bluetooth and work with Home Assistant. Buy the Airthings 325 Corentium Home 2 to keep an eye on radon, and the Aranet4 HOME to track ventilation and CO2.
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| Feature | Airthings 325 Corentium Home 2 | Aranet4 HOME | Winner |
|---|---|---|---|
| Price | $179.99 | €199.00 | Airthings 325 Corentium Home 2 |
| Rating | 4.5 | 4.7 | Aranet4 HOME |
| Warranty | 5 years | 2 years | Airthings 325 Corentium Home 2 |
| Battery Life | 3 years | 4 years | Aranet4 HOME |
| Connectivity | Bluetooth, Other | Bluetooth | Airthings 325 Corentium Home 2 |
| Integrations | Google Home, Alexa, Home Assistant | Home Assistant | Airthings 325 Corentium Home 2 |
| Sensors | Radon, Temperature, Humidity | CO2, Temperature, Humidity, Atmospheric Pressure | Aranet4 HOME |
| Weather Resistance | NO | NO | Tie |
| Screen | YES | YES | Tie |
| Alerts | Air Quality Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts | Tie |
Winner
$179.99
- + Price: $179.99
- + Warranty: 5 years
- + Connectivity: Bluetooth, Other
- - Rating: 4.5 vs 4.7
- - Battery Life: 3 years vs 4 years
- + Rating: 4.7
- + Battery Life: 4 years
- + Sensors: CO2, Temperature, Humidity, Atmospheric Pressure
- - Price: €199.00 vs $179.99
- - Warranty: 2 years vs 5 years
Frequently Asked Questions
Which is better overall: Airthings 325 Corentium Home 2 or Aranet4 HOME?
The Airthings 325 Corentium Home 2 wins overall on price, warranty, connectivity and voice assistant support. The Aranet4 HOME wins on owner feedback, battery life and sensor count.
What is the biggest difference between the Airthings 325 Corentium Home 2 and the Aranet4 HOME?
The Airthings 325 Corentium Home 2 measures radon, the Aranet4 HOME measures CO2. They share temperature and humidity, and the Aranet adds pressure.
Which has the longer warranty?
The Airthings 325 Corentium Home 2 carries 5 years, the Aranet4 HOME 2 years.
Which one works with Alexa and Google Home?
The Airthings 325 Corentium Home 2 works with both. The Aranet4 HOME does not, though both work with Home Assistant.
Who should buy the Airthings 325 Corentium Home 2?
Homeowners who need continuous radon monitoring with a long warranty and voice assistant support.
Who should buy the Aranet4 HOME?
Anyone who wants accurate CO2 readings on an E-Ink screen with up to 4 years between battery changes.
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
- 50 filters
AranetRadon Plus
$209.00
AranetAranet4 HOME
€199.00
AranetRadon One
$179.00
AranetRadiation
$139.00
EcobeeSmart Thermostat Premium
27% OFF$204.97$149.63- Airthings
325 Corentium Home 2
$179.99 
Airthings2950 Wave Radon
$109.15
GoveeSmart Air Quality Monitor CO2 H5140
$89.99
X-SenseXR0A-iR Wi-Fi Radon Detector
$99.99
GoveeSmart Air Quality Monitor
13% OFF$45.99$39.98
SonoffSAWF-08P Air Quality Monitor
$49.90
Third RealitySmart Air Quality Sensor
$49.99
AmazonSmart Air Quality Monitor
33% OFF$69.99$46.99
AirthingsWave Plus
8% OFF$249.99$230.66
Airthings2989 View Radon
$219.99
AirthingsWave Enhance
16% OFF$159.99$134.43
AirthingsView Plus
$329.99
AirthingsWave Mini
$89.99
IQAirAirVisual Pro
$329.99
EveRoom
$109.95
- Air Quality MonitorsAirthings
2950 Wave Radon
4.4(2,502)$109.15 - Air Quality MonitorsAirthings
2989 View Radon
4.2(776)$219.99 - Air Quality MonitorsAirthings
325 Corentium Home 2
4.5(421)$179.99 - Air Quality MonitorsAirthings
View Plus
4.0(1,959)$329.99 
Air Quality MonitorsAirthingsView Pollution
3.2(26)€149.00- Air Quality MonitorsAirthings
Wave Enhance
4.2(43)16% OFF$159.99$134.43 - Air Quality MonitorsAirthings
Wave Mini
4.0(1,123)$89.99 - Air Quality MonitorsAirthings
Wave Plus
4.2(3,229)8% OFF$249.99$230.66
