Good indoor air starts with proper duct design and installation. In residential ventilation systems, there can be tradeoffs between duct design/installation and the cost of ventilation fans. We will discuss the characteristics of economically optimized residential ventilation systems. Two performance metrics and simple field tests will be presented for determining the flow performance and leakage of a duct network. Flow performance and leakage tests should be performed before wallboard and ceiling panels are installed so that corrective action can be taken on substandard duct installation.
Continuing Education Units (CEUS) 1 hour in
Green Building Certificate Institute (GBCI)
Building Performance Institute (BPI) NonWholeHouse
American Institute of Architects - AIA (HSW)
Certified Green Professional (NARI & CGP)
Certified GreenHome Professional (CGHP)
State Architect / Builder License may be applicable
1) Understand how duct installation cost and operation cost balance for optimized ventilation
2) Learn guidelines for optimized duct design
3) Discuss ventilation system "C" values, and the acceptable range of C values for good ventilation system performance
4) Discuss ventilation system leakage "C" values and acceptable range for minimized duct leakage
5) Learn steps for performing two field tests for determining installed "C" values for flow performance and leakage
Instructor: Ty Newell
Ty is a co-owner and co-founder of Build Equinox, a company devoted to inventing technologies for healthy, comfortable and sustainable living. He retired from the University of Illinois in 2007 as an Assistant Dean in the College of Engineering, having advised 70 masters and doctoral graduate students, and is an emeritus professor of mechanical engineering. Ty's degrees are in mechanical engineering (BS,'74, University of Michigan and MS/PhD, '78/'80, University of Utah). He has lectured around the world on indoor air quality, comfort, solar energy, building energy efficiency, and resource conservation including keynote addresses at the Solar Energy Society of India's 25th Silver Jubilee in Hyderabad and at the TTMD Conference (Turkish ASHRAE) in Istanbul, Turkey. He has been a Fulbright Scholar at the Universidad Nacional de Salta in Argentina, an Ercotaf Scholar (European Union) at the EPFL in Lausanne Switzerland, a United Nations Workshop Leader in Beijing China, and an Academic Leader at the Tec de Monterrey Institute in Queretaro Mexico.