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Interpretation 52.2-2012-1 – September 22, 2014 (Refers to the requirements presented in ANSI/ASHRAE Standard 52.2-2012, Section 4.3, regarding the test aerosol used to measure fractional efficiency.)
Interpretation 52.2-2012-2 – October 27, 2014 (Refers to the requirements presented in ANSI/ASHRAE Standard 52.2-2012, Section 6.2, regarding loading dust for testing filtration devices.)
Interpretation IC 52.2-2012-3 – March 2, 2015 (Refers to the requirements presented in ANSI/ASHRAE Standard 52.2-2012, Section 12.3 and Table 12-1, regarding MERV determination using the 2015 Supplement to ANSI/ASHRAE Standard 52.2-2012.)
Interpretation IC 52.2-2012-4 – January 28, 2017 (Refers to the requirements presented in ANSI/ASHRAE Standard 52.2-2012, Section 12.2, regarding the minimum final resistance for an air cleaner using the 2015 Supplement to ANSI/ASHRAE Standard 52.2-2012.)