Winner
Updated November 2026
Data from the official Aranet and IQAir sites.
2026 verdict
Portable CO2 benchmark or a wall screen full of pollutants?
If your question is when to open a window, the Aranet4 HOME is the air quality monitor to buy: it reads CO2, temperature, humidity and pressure on an always-on E-Ink display, runs up to 4 years on two AA cells and carries a 2 year warranty. The IQAir AirVisual Pro tracks a wider list, adding PM2.5, PM10 and TVOC on a 5 inch color screen over Wi-Fi with indoor versus outdoor comparison, but it is tied to a micro USB cable and a weak built-in battery. Both work with Home Assistant and neither with Alexa, Google Home or Apple Home. Choose the Aranet4 HOME for ventilation and travel, and the IQAir AirVisual Pro for wildfire smoke, dust and allergy households.
Works with
Connectivity
vs
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Aranet4 HOME | IQAir AirVisual Pro | Winner |
|---|---|---|---|
| Price | $189.00 | $329.99 | Aranet4 HOME |
| Rating | 4.7 | 4.0 | Aranet4 HOME |
| Warranty | 2 years | 1 year | Aranet4 HOME |
| Battery Life | 4 years | 4 hours | Aranet4 HOME |
| Sensors | CO2, Temperature, Humidity, Atmospheric Pressure | TVOC, PM1, PM2.5, PM10, CO2, Temperature, Humidity | IQAir AirVisual Pro |
| Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Air Quality Alerts | Aranet4 HOME |
| Weather Resistance | NO | NO | Tie |
| Connectivity | Bluetooth | 2.4 GHz WiFi | Tie |
| Screen | YES | YES | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
What each one measures
The Aranet4 HOME measures CO2, temperature, humidity and atmospheric pressure. The IQAir AirVisual Pro adds PM2.5, PM10 and TVOC to CO2, temperature and humidity. If smoke and dust are the worry, only the IQAir reads them.
Display
The Aranet4 HOME uses a monochrome E-Ink screen that stays readable in any light and costs no power to hold. The IQAir AirVisual Pro has a 5 inch color LCD that also shows nearby outdoor air, but it needs power to stay on.
Power and portability
The Aranet4 HOME runs on 2 AA batteries for up to 4 years and weighs 104 g, so it goes in a bag. The IQAir needs micro USB, with a built-in battery of about 4 hours, so it is a fixed indoor unit.
Connection
The Aranet4 HOME is Bluetooth only, with no remote access. The IQAir AirVisual Pro uses 2.4 GHz Wi-Fi, so you can check it away from home and get its forecasts and outdoor comparison.
Alerts and warranty
The Aranet4 HOME raises temperature, humidity, air quality and low-battery alerts and has a 2 year warranty. The IQAir lists air quality alerts only, with a 1 year warranty.
Which one to buy if
- you want to know when a bedroom or office is stuffy
The Aranet4 HOME is a dedicated CO2 monitor, with an E-Ink display readable at a glance.
- wildfire smoke, traffic or dust is the concern
The IQAir AirVisual Pro measures PM2.5 and PM10, which the Aranet4 HOME does not.
- you want a monitor to carry between rooms or on trips
At 104 g on 2 AA batteries, the Aranet4 HOME travels easily.
- you want indoor and nearby outdoor readings on one screen
The IQAir AirVisual Pro shows them side by side over Wi-Fi, with advice to open or close the windows.
Winner
$189.00
- + Price: $189.00
- + Rating: 4.7
- + Warranty: 2 years
- - Sensors: CO2, Temperature, Humidity, Atmospheric Pressure vs TVOC, PM1, PM2.5, PM10, CO2, Temperature, Humidity
$329.99
- + Sensors: TVOC, PM1, PM2.5, PM10, CO2, Temperature, Humidity
- - Price: $329.99 vs $189.00
- - Rating: 4.0 vs 4.7
What owners say
Owners of both monitors say the same thing about why they bought one: to see what cooking, closed windows or smoke do to the air, and they treat the readings as a prompt to open a window. Aranet4 HOME owners single out accuracy that sits close to reference instruments, a crisp E-Ink display, batteries that last many months to years and history graphs in the Bluetooth app, but note it is CO2 only, needs a few minutes to settle after a move and sometimes a manual calibration. IQAir AirVisual Pro owners praise accurate PM2.5 and CO2, the large screen with nearby outdoor readings and sensitivity to smoke and traffic, while warning that the on-screen AQI uses PM2.5 alone, the CO2 sensor takes about three days to calibrate and support can be unhelpful.
Frequently Asked Questions
Which is better overall: Aranet4 HOME or IQAir AirVisual Pro?
The Aranet4 HOME, for most buyers: it has a stronger owner rating, a longer battery, a 2 year warranty and CO2 accuracy owners trust. The IQAir AirVisual Pro is better if you need PM2.5, PM10 and TVOC as well.
What is the biggest difference between the Aranet4 HOME and the IQAir AirVisual Pro?
Scope. The Aranet4 HOME is a portable, battery powered CO2 monitor on Bluetooth, while the IQAir AirVisual Pro is a plugged-in Wi-Fi monitor covering particulates, TVOC and CO2 on a color screen.
What is the difference between the Aranet4 HOME and the IQAir AirVisual Pro for wildfire smoke?
The IQAir AirVisual Pro measures PM2.5 and PM10, which is what smoke shows up as. The Aranet4 HOME measures no particulates, so it will not flag smoke.
Do the Aranet4 HOME and the IQAir AirVisual Pro work with Alexa or Google Home?
No. The Aranet4 HOME and the IQAir AirVisual Pro both list Home Assistant as their only smart home integration, with no Alexa, Google Home, Apple Home, SmartThings or Matter.
Who should buy the Aranet4 HOME?
Anyone focused on CO2 and ventilation in a bedroom, classroom or office, who wants a portable monitor with years of battery life and history graphs.
Who should buy the IQAir AirVisual Pro?
Allergy, asthma and wildfire-smoke households that want PM2.5, TVOC and CO2 with indoor versus outdoor comparison on a large color screen.
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