ASHRAE 62.1-2016 Addendum an

Addendum an for Standard 62.1-2016 — Ventilation for Acceptable Indoor Air Quality (ANSI Approved)
Amendment by ASHRAE, 2019

ASHRAE 34-2019 Addendum g

Addendum g to Standard 34-2019 — Designation and Classification of Refrigerants (ANSI Approved)
Amendment by ASHRAE, 2020