I2SL Best Practices Guide Series:
Designing and Operating Sustainable Laboratory Exhaust Systems

February 23, 2022
1 p.m. – 2 p.m.
Eastern Time

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As part of a new series, I2SL is collaborating with the U.S. Department of Energy (DOE) Federal Energy Management Program (FEMP) and National Renewable Energy Laboratory (NREL) to offer webinars highlighting new and updated best practices guides on laboratory sustainability and efficiency topics. Join Brad Cochran of CPP Wind Engineering for the first webinar of the series, covering the Designing and Operating Sustainable Laboratory Exhaust Systems Best Practices Guide. This informational webinar is provided at no cost to encourage attendees to continue improving sustainability and efficiency in laboratories. Consider joining I2SL to gain access to more educational opportunities throughout the year.

This webinar will review new advancements in designing safe and energy-efficient laboratory exhaust systems highlighted in the best practices guide, including:

  • Best practice design guidelines for exhaust stack and air intake placement
  • Developing health and odor acceptance criteria to ensure a safe working environment
  • An overview of the wind climate conditions to be taken into account when designing an exhaust system
  • Determining the best dispersion model for predicting concentrations at the nearby air intake to be used for specific applications
  • Control strategies that can be used, in part or in whole, during the design of a new laboratory or the renovation of an existing laboratory

Learning Objectives

  • Select the appropriate method for evaluating the air quality versus fan energy savings;
  • Evaluate the best VAV exhaust strategy for their application;
  • Be familiar with plume dispersion principles, which will aid in understanding the optimum placement of exhaust fans and air intakes to minimize fan energy requirements; and
  • Identify which exhaust systems can provide the most energy savings and the best return on investment.

Instructor Biography

Brad Cochran has nearly 25 years of experience conducting wind tunnel and numerical modeling studies related to laboratory exhaust design. He is a registered Professional Engineer with the state of Colorado; serves on the ASSE Z9.5 Laboratory Ventilation sub-committee; primary author of Chapter 9 – Exhaust Stack Design in the 2015 ASHRAE Laboratory Design Guide, and is the current vice-chair of the ASHRAE TC-9.10 Laboratory Ventilation Technical Committee. Brad also served on the AMCA Induced Flow Fan CRP Committee that developed AMCA Standard 260-07, "Laboratory Methods of Testing Induced Flow Fans for Rating."

In 2011, Mr. Cochran received an individual Go Beyond Award from I2SL.

During the past decade, Mr. Cochran has focused on defining new design techniques to minimize the energy requirements for laboratory exhaust systems. In 2005, Mr. Cochran developed the first laboratory exhaust system that utilized local wind data to minimize exhaust fan horsepower requirements, and in 2008 introduced the concept of monitoring chemical constituents within the exhaust manifold to reduce volume flow rates when the exhaust is essentially "clean." Since then, Brad has implemented VAV controls in over 100 exhaust systems throughout the U.S., Canada, and the U.K.

Mr. Cochran has authored and presented several papers on the subject of energy-efficient laboratory exhaust design for the American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc. (ASHRAE), I2SL, R&D Magazine, Lab Manager Magazine, LabWize, the International Facility Management Association, Air Movement and Control Association International, Inc., and the Air and Waste Management Association.


FEMP Smart Labs

The Federal Energy Management Program (FEMP), through Smart Labs, encourages energy efficiency in laboratories through a whole-building approach that enables agencies and organizations to improve the efficiency of an entire facility rather than specific laboratory components. To guide stakeholders in developing a successful Smart Labs program, the Smart Labs Toolkit describes a systematic process to help laboratory owners and operators plan, assess, optimize, and manage laboratory facilities.


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