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Table 3 Carbon dioxide concentration differentials1(ppm)

From: A study of indoor carbon dioxide levels and sick leave among office workers

  Building
  1 2
Maximum Daily Peak Differential 312 275
Daily Average Differential (ppm)   
Mean (SD) 111 (67) 123 (38)
Minimum 10 3
Maximum 309 215
Weekly Average Differential (ppm)   
Mean (SD) 111 (54) 123 (30)
Minimum 37 71
Maximum 252 169
  1. 1Concentration differential was the workday, 9AM-5PM, CO2 concentration minus the 1AM-3AM average CO2 concentration.