- 1 adult generates 0.009 ft³/min of CO₂.
- 400 ppm CO₂ standard in atmosphere
- The room volume is 2400 ft³ (300 sqft × 8 ft ceiling height)
| ACH | CO2 Contributed by Person (ppm) |
| ---- | ------------------------------- |
| 0.1 | 255.5 |
| 0.3 | 85.2 |
| 0.5 | 51.1 |
| 0.75 | 34.1 |
| 1.0 | 25.6 |
| CO₂ Level (ppm) | Description | Effects/Acceptability |
|-------------------|-----------------------------------------------|-----------------------------------------------------|
| 350–450 (normal) | Outdoor air levels (baseline atmospheric CO₂) | Ideal and typical for fresh, well-ventilated spaces.|
| 400–600 | Excellent air quality | Comfortable for most people; good for sleeping. |
| 600–800 | Acceptable air quality | Safe and adequate for most indoor environments. |
| 800–1000 | Poor air quality | Increased drowsiness; less optimal for productivity.|
| 1000–2000 | Unhealthy for long exposure | May cause headaches, fatigue, and mild discomfort. |
| 2000–5000 | Very poor air quality | Causes dizziness, nausea, and cognitive impairment. |
| >5000 | Dangerous | Prolonged exposure can lead to serious health issues.|
#### Calculation
`Conversion Factor = (Molecular Weight of CO₂ / Molar Volume of CO₂) × 10^6` = 113,600
`Stabilized CO₂ (ppm)=Baseline CO₂ (ppm) + ( CO₂ Generation Rate (ft³/min) / Air Exchange Rate (ft³/min) ) × Conversion Factors`
`Air exchange rate = <room volume> × ACH / 60min`