Carbon Dioxide Concentration - Comfort Levels

CO2 acceptance and comfort level calculator. Assess indoor air quality based on CO2 concentration levels and their effects on human health and comfort.

Calculator

Inputs

CO2 Concentration (ppm)

Ventilation Rate (cfm)

Results

Comfort Level--

Health Status--

Recommended Action--

CO2 Level (ppm)	Condition	Effects
350 - 450	Normal Outdoor Level	Baseline reference
< 600	Acceptable Levels	Good air quality for most
600 - 1000	Complaints of Stuffiness	Odor complaints begin
1000	ASHRAE & OSHA Standards	Ventilation guideline threshold
1000 - 2500	General Drowsiness	Cognitive impact begins
2500 - 5000	Adverse Health Effects	Significant health concerns
5000 - 10000	Max Working Period (8h)	Occupational exposure limit
30000	Max Working Period (15min)	Short-term exposure limit
30000 - 40000	Extreme Levels	Intoxication, nausea, increased pulse
50000	Severe Extreme Levels	Headaches, sight impairment
100000	Critical Danger	Unconsciousness, death risk

Space Type	Ventilation Rate	Approximate CO2 Level
Classrooms & Conference Rooms	15 cfm/person	~1000 ppm
Office Space & Restaurants	20 cfm/person	~800 ppm
Hospitals	25 cfm/person	~600-700 ppm

Ventilation Conversion

1 cfm (cubic feet per minute) = 1.7 m³/h = 0.47 l/s