Appendix D Clean air delivery
Section D101 General
D101.1 Clean air delivery capability.
In Group A, B, E and I occupancies, each mechanical system shall meet the requirements in Section D101.1.1.
Exception: Occupiable spaces where 100 percent of the supply air meets high-efficiency particulate air filtration.
D101.1.1 Airflow for increased filtration.
Mechanical systems shall be sized to accommodate a design airflow at a total static pressure drop that assumes the utilization of a supply air filter with a Minimum Efficiency Reporting Value (MERV) of not less than 13.