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Providing reliable ventilation throughout multifamily buildings is essential to maintaining acceptable indoor air quality. Driven by stack and wind effects, uncontrolled air movement across the building envelope and between suites makes it difficult to evenly distribute ventilation air to all suites and leads to excessive energy use, thermal comfort issues and challenges with odor, pollutant, sound and pest transmission. This seminar will provide an overview of the suite ventilation and air leakage characteristics in existing North American multifamily buildings and the test methods used to gather these data. Implications of uncontrolled air movement on system design/operation practices will be discussed.

1. The Relative Performance of Different Ventilation Configurations in Multi-Unit Residential Buildings in North America
   Duncan Phillips, Ph.D., P.E., Associate Member, RWDI, Guelph, ON, Canada
2. Suite Ventilation Characteristics of Ten Existing Canadian Multi-Unit Residential Buildings
   Craig Wray, P.Eng., Member, Consulting Engineer, Winnipeg, MB, Canada
3. Suite-Based Air Leakage Characteristics of New and Old Multi-Unit Residential Buildings
   Marianne Touchie, Ph.D., P.E., Associate Member, University of Toronto, Toronto, ON, Canada