Best Smart Home CO2 Monitors
Smart home integration transforms a CO2 monitor from a passive display into an active part of your home automation. When your CO2 monitor connects to your smart home platform, you can set up automations that turn on a fan, open smart vents, or send a notification when CO2 exceeds a threshold. Platforms like Home Assistant, Apple HomeKit, and Amazon Alexa all support various CO2 monitors, though compatibility varies significantly by brand. WiFi-connected monitors also provide the benefit of cloud dashboards where you can review historical trends, set alerts, and monitor air quality remotely. These are the top monitors that play well with smart home ecosystems.
How We Picked
We screened all 31 monitors in our directory that qualify for this list and ranked the top 10. Selection weights sensor type first (NDIR and photoacoustic only — no eCO2 estimates), then published accuracy, then the features that specifically matter for smart home co2 monitors. Prices are typical street prices and move often; we re-check them monthly.
Aranet Aranet4 Home
Best overallConnects over Bluetooth. Bluetooth-only means automations depend on a phone or hub being in range, which limits what you can reliably trigger.
AirGradient ONE
Runner-upConnects over WiFi. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification. It also exposes enough sensors to drive more than one automation.
Airthings View Plus
Connects over Bluetooth and WiFi. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification. It also exposes enough sensors to drive more than one automation.
Aranet Aranet4 Pro
Connects over Bluetooth. Bluetooth-only means automations depend on a phone or hub being in range, which limits what you can reliably trigger.
Qingping Air Monitor
Connects over Bluetooth and WiFi. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification. It also exposes enough sensors to drive more than one automation.
INKBIRD IAM-T1
Best valueConnects over WiFi. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification.
Airthings Wave Plus
Connects over Bluetooth. Bluetooth-only means automations depend on a phone or hub being in range, which limits what you can reliably trigger. It also exposes enough sensors to drive more than one automation.
Awair Element
Connects over WiFi and Bluetooth. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification. It also exposes enough sensors to drive more than one automation.
Kaiterra Laser Egg+ CO2
Connects over WiFi and Bluetooth. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification.
Netatmo Smart Indoor Air Quality Monitor
Connects over WiFi and Bluetooth. WiFi is what makes automation practical — you can trigger a fan or an ERV when CO2 crosses a threshold rather than just receive a notification.
Buying Tips: Best Smart Home CO2 Monitors
- 1
Check specific platform compatibility before buying. Not all WiFi monitors support HomeKit, and some only work with their own proprietary app.
- 2
Thread and Zigbee monitors like the Eve Room offer local smart home control without relying on cloud servers, which means faster response times and better privacy.
- 3
For Home Assistant users, monitors with open APIs or MQTT support (like AirGradient) provide the most flexible integration options.
- 4
Consider placement relative to your WiFi router. Some monitors have weak WiFi radios and may lose connectivity in rooms far from the router.