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 1. Kidde CD-100 Carbon Dioxide Detector Rating: ⭐⭐⭐⭐☆ (4.3/5) | Price: $89.99 Pros: Cons: 2. Temtop M10 Air Quality…