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Efficiency Standards (California Energy Commission, 2015) requirements of the greater of 15 cfin/occupant or 0.15 cfin/ft2 of floor area. Following installation of the system conduct testing and balancing to insure that required amount of outdoor air is entering each habitable room and provide a written report documenting the outdoor airflow rates. Do not use exhaust only mechanical outdoor air systems, use only balanced outdoor air supply and exhaust systems or outdoor air supply only systems. Provide a manual for the occupants or maintenance personnel, that describes the purpose of the mechanical outdoor air system and the operation and maintenance requirements of the system. PM2.5 Outdoor Air Concentration Mitigation. Install air filtration with sufficient PM2.5 removal efficiency (e.g. MERV 13 or higher) to filter the outdoor air entering the mechanical outdoor air supply systems, such that the indoor concentrations of outdoor PM2.5 particles are less than the California and National PM2.5 annual and 24-hour standards. Install the air filters in the system such that they are accessible for replacement by the occupants or maintenance personnel. Include in the mechanical outdoor air ventilation system manual instructions on how to replace the air filters and the estimated frequency of replacement. References AC 2525 Main LLC. 2019. Environmental Settlement Agreement with Laborers' International Union of North America Local 652. Asset Gas SC. Inc. 2019. Settlement Agreement and Release with Jose Mexicano, Alejandro Martinez, and Laborers' International Union of North America Local 652. BIFA. 2018. BIFMA Product Safety and Performance Standards and Guidelines. www.bifina.org/page/standardsoverview California Air Resources Board. 2009. Airborne Toxic Control Measure to Reduce Formaldehyde Emissions from Composite Wood Products. California Environmental 13 of 19