IEQ Applications: Don’t Blame Standard 62.1 for 1,000 ppm CO2

Many still use 1,000 ppmvof CO2 as a criteria for defining good IAQ, even though Standard62.1 hasn’t contained an indoor CO2 limit since 1989. This columndescribes what the standard says about CO2 now and in the past,explains the basis for the 1,000 ppmv value and stresses that usinga CO2 reference value must consider the building type and itsoccupancy.