Education Session Number 5

4:00 p.m. to 5:00 p.m.
Click here for session handouts

Steve Caulfield Image_edited.png

Using C02 Monitoring to Manage Ventilation in Buildings

Steve Caulfield, PE, CIH - Turner Building Science & Design, Harrison, ME

About this program:

The measurement of indoor carbon dioxide concentrations has been used for many years to assess and control building ventilation rates, as well as to characterize indoor air quality. Over the years these applications of indoor CO2 monitoring have been misunderstood, despite the publication of technical papers and guidance documents and the organization of conference sessions in an attempt to reduce some of the confusion. There is renewed interest in such applications of CO2 measurement in the context of airborne infectious disease control. This presentation will review the application of indoor CO2 monitoring to building ventilation and IAQ, and discuss several issues regarding these measurements and their interpretation.

Attendees will learn:

  • The limitations of using carbon dioxide as a proxy for the building ventilation rate.

  • What the carbon dioxide concentration says about the overall indoor air quality and what it doesn't.

  • The importance of the theory and assumptions inherent in converting a carbon dioxide concentration into a per person ventilation rate.

  • What limitations are present in using carbon dioxide as an indicator of infection risk.

About the Presenter:

Steven M. Caulfield is a registered Professional Engineer (mechanical) and a Certified Industrial Hygienist.  Mr. Caulfield has focused on indoor air quality, industrial hygiene, and engineering design for more than 30 years. He is a past president and current Board Member of the Maine Indoor Air Quality Council. Steve is currently President of Turner Building Science & Design in Harrison, Maine.

Program Level:

All levels

Content Area(s):

Design and Construction, Indoor Air Quality, COVID-19 Risk Reduction