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June 17, 2010
Outdoor air is added to a building via a controlled ventilation system. What isn't controlled is the air change created by wind effects, stack effects and pressure effects caused by the operation of the HVAC system. The following article was published in ASHRAE Journal, April, 2002, pages 18-21. Reprinted with permission.
RR-1007: Building America Special Research Project—Ventilation Efficiency of Controlled Ventilation Systems