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As HVACR professionals, our major concern is the engineering of indoor environments. Most of our industry?s emphasis is on providing comfort conditioning, but as professionals, health and safety must also be a primary concern.

For indoor environments, where concentrations of many pollutants can be two to at least five times greater than in outdoor air,9 source control and ventilation are key control means. People spend, on average, nearly 90% of their time indoors,10 with the majority of that time in their homes. These facts, taken together, would suggest that residential ventilation ought to have a large emphasis in ASHRAE.

Citation: ASHRAE Journal, vol. 46, no. 1, January 2004