ASHRAE Releases Three Addenda for Public Review

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has made available three addenda for public review. The review period runs through May 15, 2022. Comments can be posted online at http://osr.ashrae.org/.

The addenda are:

1^st Public Review of BSR/ASHRAE/IES Addendum ct to ANSI/ASHRAE/IES Standard 90.1-2019, Energy Standard for Buildings Except Low-Rise Residential Buildings

Addendum ct revises the baseline envelope description in Table G3.1, Item 5, to explain how the baseline fenestration area is established (a response to interpretation request IC 90.1-2019-8), to remove a duplicate requirement for roof albedo, and to clarify that automatic shading devices are not modeled in the baseline.

1^st Public Review of BSR/ASHRAE/IES Addendum bi to ANSI/ASHRAE/IES Standard 90.1-2019, Energy Standard for Buildings Except Low-Rise Residential Buildings

This proposed addendum addresses roof replacements with a new definition and subsection for handling existing roofs with above-deck insulation. Currently, there are no specific requirements or definitions for roof replacements; this has constrained such projects to the general alteration requirements of Section 5.1.3, which are difficult for certain existing roofs to meet. These modifications to Section 5 will minimize marketplace confusion and prevent conflicting use of the standard. Please note that this version of Addendum bi includes a clarification to the original first public review draft of the same name (public review date 11/5/21) and fully replaces that draft and all associated comments.

1^st Public Review of BSR/ASHRAE/ICC/USGBC/IES Addendum r to ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1-2020, Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

This addendum proposes to align current code requirements for criteria addressing roofs with a slope of exactly 2:12. In section 5.3.5.3, roofs with a slope less than 2:12 are differentiated from roofs with slopes greater than or equal to 2:12 and, therefore, have different SRI requirements.