NOTE: All documents linked from this page are in 
PDF-format.
Interpretation 15-2019-1 – February 2, 2020 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2019, Section 9.3.1.1, regarding pressure vessels having inside dimensions of 6 in. (152 mm) or less.)
Interpretation 15-2019-2 – February 4, 2021 (Refers to the requirements presented in ANSI/ASHRAE Standard 15-2019, Section 7.6.5(b), regarding response time of refrigerant detector.)