This presentation covers the background and history of legionellosis and the conditions in building water systems that amplify it. The key parts of ANSI/ASHRAE Standard 188-2015 are summarized to give the audience a conceptual framework and sources of more in depth knowledge are given. Compliance requirements, health care facility requirements, the necessary building survey to assess the risk of LD, the key elements of a WMP (water management plan), control points, and the verification and validation requirements. The design, documentation, operation & maintenance of building water systems by the program team of knowledgeable persons is stressed.

ASHRAE 191P is a proposed standard setting minimum performance requirements for mechanical and process systems as well as a required water balance analysis for all water sources and sinks within a building and site. The presentation briefly discusses the history of the standard, define scope of how this standard interacts with other standards such as plumbing and irrigation standards, and highlight key requirements of each section covering everything from cooling towers to vivarium animal watering systems. Finally, examples of whole building water balances are shared to demonstrate how to apply the standard for different building types.