ASHRAE GUIDELINE 12
Managing the Risk of Legionellosis Associated with Building Water Systems
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| Organization: | ASHRAE |
| Publication Date: | 8 April 2021 |
| Status: | active |
| Page Count: | 5 |
scope:
FOREWORD
Addendum b to Guideline 12-2020 includes reference to the potential use of alternate heat sources, such as electric heat trace, alone or as a supplement to recirculation, to maintain hot water throughout the building hot-water system at or above the recommended minimum temperature. The addendum also updates the reference for the Cooling Technology Institute Guideline from the old designation of WTB-148 to the new designation, GDL-159.
Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and strikethrough (for deletions) unless the instructions specifically mention some other means of indicating the changes.
Document History
January 1, 2023
Managing the Risk of Legionellosis Associated with Building Water Systems
This guideline applies to new and existing centralized hot and cold potable building water systems and to nonpotable building water systems in human-occupied commercial, institutional, multiunit...
August 9, 2021
Managing the Risk of Legionellosis Associated with Building Water Systems
FOREWORD
Guideline 12 Addendum c expands the explanation of supplemental disinfection alternatives used to treat building water systems in Section 5, “Potable Water Systems,” and renumbers Table 2...
ASHRAE GUIDELINE 12
April 8, 2021
Managing the Risk of Legionellosis Associated with Building Water Systems
FOREWORD
Addendum b to Guideline 12-2020 includes reference to the potential use of alternate heat sources, such as electric heat trace, alone or as a supplement to recirculation, to maintain hot...
September 30, 2020
Managing the Risk of Legionellosis Associated with Building Water Systems
FOREWORD
Addendum a revises the definition of “siphoning” to match current theories of siphon operation.
Note: In this addendum, changes to the current standard are indicated in the text by...
August 21, 2020
Managing the Risk of Legionellosis Associated with Building Water Systems
A description is not available for this item.
May 15, 2020
Managing the Risk of Legionellosis Associated with Building Water Systems
A description is not available for this item.
March 26, 2020
Managing the Risk of Legionellosis Associated with Building Water Systems
This guideline applies to new and existing centralized hot and cold potable building water systems and to nonpotable building water systems in human-occupied commercial, institutional,...
December 20, 2010
Minimizing the Risk of Legionellosis Associated with Building Water Systems
A description is not available for this item.
February 10, 2000
Guideline to Minimizing the Risk of Legionellosis Associated with Building Water Systems
This guideline provides specific environmental and operational guidelines that will contribute to the safe operational of building water systems to minimize the risk of occurrence of Legionellosis....
April 1, 1999
Minimizing the Risk of Legionellosis Associated with Building Water Systems
A description is not available for this item.