Sensor Data
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Measurement Ranges
Temperature (Comfort Range [ASHRAE Standard 55-2017])
- 67°F - 82°F: Varies with season, humidity, geographic factors
CO2 Values
- Outside ambient: ~400 ppm
- Indoor with ventilation typical: 400-1000 ppm
- Onset of symptoms of sick building syndrome: 800 ppm
- Levels associated with complaints of drowsiness and poor air: 1000-2000 ppm
- Levels associated with headaches, sleepiness, poor concentration: 2000-5000 ppm
- OSHA permissible exposure limit: 5000 ppm (8-hour average)
Particulate Values (PM2.5) 24-hour average air quality index ratings [EPA 454/B-18-007]
- Good: 0-12 μg/m³
- Moderate: 12.1-35.4 μg/m³
- Unhealthy for Select Populations: 35.5-55.4 μg/m³
- Unhealthy: 55.5-150.4 μg/m³
- Very Unhealthy: 150.5-250.4 μg/m³
- Hazardous: 250.5-500 μg/m³