ASHRAE to Revise Guideline on Minimizing Legionellosis in Building Water Systems

Published August 9, 2017

​ASHRAE seeks public comment on the proposed revision of Guideline 12-2000, which is intended to provide information and guidance for the control of legionellosis associated with building water systems. The guideline’s intended audience includes owners of human-occupied buildings and individuals who are involved in the design, construction, installation, commissioning, management, operation, maintenance, and service of centralized building water systems and components. Guideline 12, Minimizing the Risk of Legionellosis Associated with Building Water Systems, also provides direction in implementing ASHRAE Standard 188, Legionellosis: Risk Management for Building Water Systems. ASHRAE Standard 188 was published in 2015 and provides specific requirements for what legionellosis control strategies must accomplish and how they should be documented.

“Our goal with Guideline 12 is to have a strong companion document that works in tandem with ASHRAE Standard 188,” said Michael Patton, a member of ASHRAE Standing Standard Project Committee (SSPC) 188, which developed the guideline.

Interested individuals have until Monday, Sept. 11, to submit comments on the proposed revision of ASHRAE’s Guideline 12. The public review draft of the guideline (PDF) is available on the organization’s website. See ASHRAE’s press release for more information.

Guideline 12 is a continuous maintenance guideline, which means that ASHRAE anticipates that changes will be made to improve it. The organization plans to republish Guideline 12 with approved addenda and errata every three years.