North Alabama ASHRAE Chapter Meeting: May 12, 2017, Managing Legionella Growth & Spread in Buildings and Dedicated Outside Air Systems

Legionnaires’ disease is serious but manageable:

Legionnaires’ disease is a serious type of pneumonia caused by bacteria, called Legionella, that live in water. Legionella can make people sick when they inhale contaminated water from building water systems that are not adequately maintained. ASHRAE Standard 188, 10 years in the making is now available to help designers and building owners to manage risk factors. It can be purchased from ASHRAE at: You can read it for fee on the ASHRAE website:

Read ASHRAE Vice President Patricia T. Graef, P.E.’s notes on this important topic at: 2017-05-12-Legionellosis-Risk Management for Building Water Systems

Free Toolkit: 

The ASHRAE toolkit Developing a Water Management Program to Reduce Legionella Growth & Spread in Buildings is available for free download on the Center for Disease Control (CDC) website

So What?

Multiple common preventable maintenance deficiencies have been identified in association with disease outbreaks, highlighting the importance of comprehensive water management programs for water systems in buildings. Read how they affected our health at: 2016-06-07-MMWR-Morbidity and Mortality Weekly Report.

Save energy with Dedicated Outside Air Systems (DOAS):

Dedicated Outside Air Systems (DOAS) bring fresh air into the building. They save energy by condition only the ventilation air for buildings, but additional measures can save even more energy. Read ASHRAE Vice President Patricia T. Graef, P.E.’s notes on this energy-saving opportunity at: The Logic of Dedicated Outside Air Systems and the Core Technologies that Make Them Effective.

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