Updated November 2026
Data from the official Airthings and Aranet sites.
2026 verdict
A pocket meter for stuffy rooms is not a radon instrument, and the Aranet4 HOME is the recommendation when carbon dioxide is the gas you mean.
It is the better reviewed of the two, with an NDIR CO2 sensor, atmospheric pressure, an e-ink screen and two AA batteries rated for 4 years. The Airthings 2950 Wave Radon is the radon meter, with a 5 year warranty, Google Home and Alexa as well as Home Assistant, and about 1.5 years on two AA cells. It has no screen and no CO2 sensor. Neither one uses Wi-Fi. Choose the Aranet4 HOME for ventilation. Choose the Airthings 2950 Wave Radon for soil gas.
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life2.7×Aranet4 HOME4 years vs 1.5 years
- Warranty2.5×Airthings 2950 Wave Radon5 years vs 2 years
| Feature | Airthings 2950 Wave Radon | Aranet4 HOME | Winner |
|---|---|---|---|
| Price | $105.83 | $189.00 | Airthings 2950 Wave Radon |
| Rating | 4.4 | 4.7 | Aranet4 HOME |
| Warranty | 5 years | 2 years | Airthings 2950 Wave Radon |
| Battery Life | 1.5 years | 4 years | Aranet4 HOME |
| Connectivity | Bluetooth, Other | Bluetooth | Airthings 2950 Wave Radon |
| Screen | NO | YES | Aranet4 HOME |
| Integrations | Google Home, Alexa, Home Assistant | Home Assistant | Airthings 2950 Wave Radon |
| Sensors | Radon, Temperature, Humidity | CO2, Temperature, Humidity, Atmospheric Pressure | Aranet4 HOME |
| Weather Resistance | NO | NO | 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
Which gas
The Airthings 2950 Wave Radon measures radon, temperature and humidity. The Aranet4 HOME measures CO2, temperature, humidity and atmospheric pressure. An Airthings versus Aranet question on this page is radon against ventilation, not two readings of the same hazard. Buying the higher-scoring meter still leaves the other gas unmeasured.
Screen and battery
The Aranet4 HOME has an e-ink screen and is rated for 4 years on two AA batteries. The Airthings 2950 Wave Radon has no screen, uses a wave-to-check ring, and is rated for about 1.5 years on two AA batteries. Both are cordless. The Aranet is the one you can read without a phone, and the reading will be carbon dioxide.
Assistants
The Airthings 2950 Wave Radon works with Google Home, Alexa and Home Assistant, over Bluetooth and SmartLink to an Airthings hub. The Aranet4 HOME lists Home Assistant only, over Bluetooth, with no Wi-Fi and no voice assistant. If a speaker has to announce the number, the radon meter is the one that can, and it will announce radon, not CO2.
Warranty
The Airthings 2950 Wave Radon carries a 5 year warranty. The Aranet4 HOME carries a 2 year warranty. That is a real gap on a device you leave alone for years, and it does not add a CO2 sensor to the Airthings or a radon sensor to the Aranet.
Which one to buy if
- a closed room's carbon dioxide is the thing making you drowsy
The Aranet4 HOME measures CO2 with an NDIR sensor and shows it on e-ink, with pressure alongside. The Airthings 2950 Wave Radon does not measure CO2.
- radon in a basement is the reason you are shopping
The Airthings 2950 Wave Radon measures radon on AA batteries. The Aranet4 HOME has no radon sensor, however long its battery rating is.
- a voice assistant should receive the radon reading
Both assistants are on the Airthings 2950 Wave Radon. The Aranet4 HOME integrates with Home Assistant only.
- you want the number on the device, not only in an app
The Aranet4 HOME has an e-ink screen. The Airthings 2950 Wave Radon has no display, only a colored ring when you wave.
$105.83
- + Price: $105.83
- + Warranty: 5 years
- + Connectivity: Bluetooth, Other
- - Rating: 4.4 vs 4.7
- - Battery Life: 1.5 years vs 4 years
Winner
$189.00
- + Rating: 4.7
- + Battery Life: 4 years
- + Screen: YES
- - Price: $189.00 vs $105.83
- - Warranty: 2 years vs 5 years
What owners say
Owners of both meters use a long-running number instead of a one-off kit, and both accept Bluetooth as the way the phone gets that number. Airthings 2950 Wave Radon owners describe radon that tracks weather and a mitigation fan, a wave-to-check ring, and readings that matched a lab test after 48 hours. They complain about syncing only when the app is open nearby, slow chat-only support, and a minority of false spikes. Aranet4 HOME owners describe CO2 they trust against other meters, an e-ink screen readable in any light, and AA cells that last through travel. They mention a few minutes to settle after a move and humidity that can sit slightly off.
Frequently Asked Questions
Which is better overall: Airthings 2950 Wave Radon or Aranet4 HOME?
The Aranet4 HOME wins the sheet, on the review record, battery life, screen and a wider sensor count built around CO2 and pressure. The Airthings 2950 Wave Radon is the one that measures radon, with a 5 year warranty and Google Home and Alexa.
Airthings or Aranet: which measures radon and which measures CO2?
The Airthings 2950 Wave Radon measures radon, temperature and humidity. The Aranet4 HOME measures carbon dioxide, temperature, humidity and atmospheric pressure. Neither measures the other's headline gas, and neither has Wi-Fi.
What is the biggest difference between the Airthings 2950 Wave Radon and the Aranet4 HOME?
The pollutant, then the screen. The Airthings 2950 Wave Radon is a screenless radon meter on about 1.5 years of AA batteries. The Aranet4 HOME is an e-ink CO2 meter rated for 4 years on the same two AA cells, with pressure and Home Assistant only.
Does the Aranet4 HOME work with Alexa?
No. The Aranet4 HOME is Bluetooth only and lists Home Assistant. The Airthings 2950 Wave Radon works with Alexa, Google Home and Home Assistant, and it still measures radon rather than the CO2 the Aranet is for.
Who should buy the Airthings 2950 Wave Radon?
Someone who wants continuous radon on batteries, a wave-to-check light, and Google Home or Alexa, with a 5 year warranty. It will not tell you the CO2 in a closed office.
Who should buy the Aranet4 HOME?
Someone tracking ventilation with NDIR CO2, e-ink, pressure and about 4 years on two AA batteries. It is the wrong meter if the Airthings 2950 Wave Radon was on the list for soil gas.
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