CO2 & COVID-19

Target realistic CO2 levels and exhaust to the outside at 600 to 800 Air Quality Index of the UBA (German Federal Environmental Agency). CO2 and Equivalent CO2 Values

AQI-UBA Hygienic Rating Recommendation Exposure Limit
N Rating eCO2 / CO2
5 Unhealthy >1500 Situation not acceptable Heavily contaminated indoor air / Ventilation required Hours
4 Poor 1000-1500 Major objections Use only if unavoidable Intensified ventilation recommended 1 month
3 Moderate 800-1000 Some objections Intensified ventilation recommended Search for sources 12 month
2 Good 600-800 No relevant objections Increased ventilation recommended Search for sources no limit
1 Excellent 400 - 600 No
objections		 Sufficient ventilation recommended no limit