ASHRAE+62.1-2022+(1) - Page 086

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(This appendix is not part of this standard. It is merely informative and does not contain requirements necessary for conformance to the standard. It has not been processed according to the ANSI requirements for a standard and may contain material that has not been sub- ject to public review or a consensus process. Unresolved objectors on informative material are not offered the right to appeal at ASHRAE or ANSI.)

INFORMATIVE APPENDIX Q ADDENDA DESCRIPTION

ANSI/ASHRAE Standard 62.1-2022 incorporates ANSI/ASHRAE Standard 62.1-2019 and Addenda a, b, c, d, f, g, i, p, y, aa, and ao to ANSI/ ASHRAE Standard 62.1-2019. Table Q-1 lists each addendum and describes the way in which the standard is affected by the change. It also lists the ASHRAE and ANSI approval dates for each addendum.

Informative: Many sections and appendices have been renumbered in the 2022 edition. The designations listed below reflect those prior to reorganization. Final designations may differ.

Table Q-1 Addenda to ANSI/ASHRAE Standard 62.1-2019

Addendum Section(s) Affected Description of Changes* Approval Dates

a 6.2.1.1.3 Addendum a clarifies that air density adjustments are permitted but are not required. January 27, 2021 (Stdcomm)

February 4, 2021 (BOD) February 26, 2021 (ANSI)

b 3.1; Figure 3-1 Addendum b clarifies the definition of recirculated air by removing the requirement that recirculated air must leave the space and by updating Figure 3-1 to include air-condition units that are inside the space

c 3.1 Addendum c clarifies what the committee considers an unusual source . The new definition makes clear that the unusual nature of a source has to do with its relationship to common items and activities within the space.

d 3.1; Table 5-1 Addendum d clarifies that open-circuit cooling towers, closed-circuit cooling towers, and evaporative condensers are all covered by the minimum separation distance requirements.

f 5.10 Addendum f clarifies the intent of Section 5.10, “Maximum Indoor Air Dew Point in Mechanically Cooled Buildings,” which had previously been interpreted by some users to mean that the standard requires humidity sensors in every space served by a mechanically cooled system.

June 30, 2020 (ASHRAE/ANSI)

October 30, 2020 (ASHRAE/ANSI)

October 30, 2020 (ASHRAE/ANSI)

June 30, 2021 (ASHRAE/ANSI)

September 30, 2021

(ASHRAE/ANSI)

g Table 6-1; Table 6-3; 6.2.1.14;

6.2.1.1.7.1; Table J-1 (previously Table I-1); Table M-1 (previously

Table L-1)

Addendum g removes some items related to nontransient occupancies that are now under the scope of ANSI/ ASHRAE Standard 62.2, “Ventilation and Acceptable Indoor Air Quality in Residential Buildings.”

• These descriptions may not be complete and are provided for information only.