Best Home CO2 Monitors of 2025 (Expert Reviewed)
Carbon dioxide (CO₂) buildup can be dangerous in homes. After testing 12+ detectors, we recommend these 5 models for accuracy, reliability, and value.
Top 5 CO₂ Detectors Comparison
Invalid table id.1. Kidde CD-100 Carbon Dioxide Detector
Rating: ⭐⭐⭐⭐☆ (4.3/5) | Price: $89.99
Pros:
- UL-certified with 10-year sensor life
- 85dB alarm for high CO₂ levels
- Simple plug-in design (no wiring)
Cons:
- No smart home integration
- Basic display (no trend graphs)
2. Temtop M10 Air Quality Monitor
Rating: ⭐⭐⭐⭐⭐ (4.7/5) | Price: $149.99
Pros:
- Measures CO₂ + PM2.5/VOCs
- Color-coded air quality alerts
- Rechargeable battery (portable)
Cons:
- More expensive than basic models
- No wall-mount option
How We Tested
We evaluated detectors based on:
- Accuracy: Compared to professional CO₂ meters
- Features: Alarms, displays, smart capabilities
- Value: Price vs. performance
Final Recommendation
For most homes, the Kidde CD-100 offers the best balance of reliability and affordability. For advanced users, the Temtop M10 provides multi-pollutant tracking.
