Where should I place an air quality monitor?

Place it at breathing height (3-5 feet) in the room where you spend the most time. Keep it away from windows, vents, and cooking areas for representative readings.

How often do air quality monitor sensors need replacement?

PM2.5 laser sensors last 3-5 years. NDIR CO2 sensors last 10+ years with auto-calibration. VOC sensors may drift after 2-3 years and can't be recalibrated on most consumer units.

Best Indoor Air Quality Monitors 2026