CO2 Sensor Reading High With Windows Open: Causes and Fixes
Your CO2 sensor reads high near open windows? Learn the four usual causes, outdoor baseline values and how to check calibration at altitude.
4 articles
CO2 and Air Quality Monitors
CO2 and Air Quality Monitors
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Safe CO2 Level in a Bedroom at Night: Under 1,000 ppm
Keep bedroom CO2 under 1,000 ppm overnight. See Health Canada's guideline, typical overnight readings, and how ventilation keeps sleep air safe.
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Why Does CO2 Rise in a Closed Office? Causes and Fixes
Indoor CO2 climbs when occupants exhale faster than outdoor air can dilute it. Learn the mass balance behind the build-up and how ventilation fixes it.
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WiFi CO2 Monitor for Classroom: How to Track Ventilation
Track classroom CO2 with a WiFi monitor. Learn the 1000 ppm threshold, how to read 24-hour averages, and when to open windows for better ventilation.