Winner
Updated November 2026
Data from the official Airthings and Aranet sites.
2026 verdict
As a radon monitor that plugs into the rest of the house, the Airthings 325 Corentium Home 2 is the better pick of these two, with voice assistant support and a longer warranty.
It works with Alexa, Google Home and Home Assistant, can link to an Airthings Hub through SmartLink for data around the clock, carries a 5-year warranty against 2 years and is the more affordable of the pair. The Aranet Radon Plus answers with endurance and one extra reading: its two AA batteries are rated for 7 years against 3, and it adds atmospheric pressure to radon, temperature and humidity, shown on an E-Ink screen. Both are battery powered, both talk Bluetooth to a phone app and both keep a history and alert on radon. Choose the Airthings 325 Corentium Home 2 for an Alexa or Google home or a longer warranty, and the Aranet Radon Plus for a Home Assistant setup where you want to forget the batteries for years.
Works with
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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty2.5×Airthings 325 Corentium Home 25 years vs 2 years
- Battery Life2.3×Aranet Radon Plus7 years vs 3 years
| Feature | Airthings 325 Corentium Home 2 | Aranet Radon Plus | Winner |
|---|---|---|---|
| Price | $179.97 | $209.00 | Airthings 325 Corentium Home 2 |
| Rating | 4.4 | 4.8 | Aranet Radon Plus |
| Warranty | 5 years | 2 years | Airthings 325 Corentium Home 2 |
| Battery Life | 3 years | 7 years | Aranet Radon Plus |
| 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 | Radon, Temperature, Humidity, Atmospheric Pressure | Aranet Radon Plus |
| Weather Resistance | NO | IP20 | Different strengths |
| Screen | YES | YES | Tie |
| Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
Smart home platforms
The Airthings 325 Corentium Home 2 works with Alexa, Google Home and Home Assistant, so you can ask a speaker for the radon level. The Aranet Radon Plus works with Home Assistant only, which is fine for a tinkerer and a dead end for a voice assistant household.
Remote access
Both talk Bluetooth to a phone app. The Airthings 325 Corentium Home 2 can also connect to an Airthings Hub through SmartLink for data online around the clock; the Aranet Radon Plus reaches you remotely only through Home Assistant.
Battery life
Both run on two AA batteries. The Aranet Radon Plus is rated for 7 years and the Airthings 325 Corentium Home 2 for 3, so the Aranet is the one you set and forget.
Warranty
Airthings covers the Airthings 325 Corentium Home 2 for 5 years, Aranet the Aranet Radon Plus for 2. For a device meant to sit in a basement for years, that is a real difference.
Sensors and screen
Both read radon, temperature and humidity. The Aranet Radon Plus adds atmospheric pressure and shows it all on an E-Ink screen; the Airthings 325 Corentium Home 2 uses an LCD. Neither measures CO2, VOCs or particles.
Which one to buy if
- you want to ask Alexa or Google for the radon level
The Airthings 325 Corentium Home 2 works with both, and the Aranet Radon Plus with neither.
- your smart home runs on Home Assistant
The Aranet Radon Plus works with Home Assistant and its batteries are rated for 7 years.
- you want the longest warranty
The Airthings 325 Corentium Home 2 is covered for 5 years against 2.
- the monitor goes somewhere hard to reach
A battery rated for 7 years means far fewer trips to change it.
Winner
$179.97
- + Price: $179.97
- + Warranty: 5 years
- + Connectivity: Bluetooth, Other
- - Rating: 4.4 vs 4.8
- - Battery Life: 3 years vs 7 years
$209.00
- + Rating: 4.8
- + Battery Life: 7 years
- + Sensors: Radon, Temperature, Humidity, Atmospheric Pressure
- - Price: $209.00 vs $179.97
- - Warranty: 2 years vs 5 years
What owners say
Owners of both radon monitors say the same two things: continuous readings show how radon moves with the weather and ventilation, which makes them good for checking a mitigation system, and both need time before the averages settle. Both groups also name Bluetooth range as the limit. Airthings 325 Corentium Home 2 owners single out effortless pairing, polished charts and plain Good, Fair and Poor readouts, and a few saw it disagree with a second meter. Aranet Radon Plus owners talk about readings every 10 minutes that match mail-in lab tests, an easy to read E-Ink screen and Home Assistant dashboards, and they complain about short range in a basement and no cloud sync.
Frequently Asked Questions
Which is better overall: Airthings 325 Corentium Home 2 or Aranet Radon Plus?
The Airthings 325 Corentium Home 2, for most homes: it works with Alexa, Google Home and Home Assistant, has a 5-year warranty and is the more affordable of the two. The Aranet Radon Plus is the pick for longer battery life and an extra pressure sensor.
What is the biggest difference between the Airthings 325 Corentium Home 2 and the Aranet Radon Plus?
Integration against endurance. The Airthings 325 Corentium Home 2 reaches voice assistants and an Airthings Hub, while the Aranet Radon Plus works only with Home Assistant but runs up to 7 years on its batteries, against 3.
Do the Airthings 325 Corentium Home 2 and the Aranet Radon Plus need Wi-Fi?
No. Both are battery powered and connect to a phone over Bluetooth. The Airthings 325 Corentium Home 2 can reach the internet through an Airthings Hub, and the Aranet Radon Plus through Home Assistant.
Does the Airthings 325 Corentium Home 2 measure anything besides radon?
Temperature and humidity. The Aranet Radon Plus reads those too and adds atmospheric pressure; neither tracks CO2, VOCs or particles.
Who should buy the Airthings 325 Corentium Home 2?
Anyone who wants continuous radon monitoring tied into Alexa or Google Home, with an on-device screen and a 5-year warranty.
Who should buy the Aranet Radon Plus?
Home Assistant users who want an E-Ink radon monitor that also reads pressure and runs for years on one set of batteries.
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