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exhaust only mechanical outdoor air systems, use only balanced outdoor air supply and <br />exhaust systems or outdoor air supply only systems. Provide a manual for the occupants or <br />maintenance personnel, that describes the purpose of the mechanical outdoor air system and <br />the operation and maintenance requirements of the system. <br />PM2.5 Outdoor Air Concentration Mitigation. Install air filtration with sufficient PM2.5 <br />removal efficiency (e.g. MERV 13 or higher) to filter the outdoor air entering the <br />mechanical outdoor air supply systems, such that the indoor concentrations of outdoor PM2.5 <br />particles are less than the California and National PM2.5 annual and 24-hour standards. <br />Install the air filters in the system such that they are accessible for replacement by the <br />occupants or maintenance personnel. Include in the mechanical outdoor air ventilation <br />system manual instructions on how to replace the air filters and the estimated frequency of <br />replacement. <br />References <br />BIFA. 2018. BIFMA Product Safety and Performance Standards and Guidelines. <br />www.bifma.org/vage/standardsoverview <br />California Air Resources Board. 2009. Airborne Toxic Control Measure to Reduce <br />Formaldehyde Emissions from Composite Wood Products. California Environmental <br />Protection Agency, Sacramento, CA. <br />httns://www.arb.ca.gov/regact/2007/comywood07/fro-final.ndf <br />California Air Resources Board. 2011. Toxic Air Contaminant Identification List. <br />California Environmental Protection Agency, Sacramento, CA. <br />httns://www.arb.ca.gov/toxics/id/taclist.htm <br />California Building Code. 2001. California Code of Regulations, Title 24, Part 2 Volume 1, <br />Appendix Chapter 12, Interior Environment, Division 1, Ventilation, Section 1207: 2001 <br />California Building Code, California Building Standards Commission. Sacramento, CA. <br />7 �f 1 8 <br />