In the section "Indoor Air Quality Policy for Maintenance and Renovations" edit the third bullet point to read:

- Do not operate permanently-installed air handling equipment during construction unless filtration media with a minimum efficiency reporting value (MERV) of 8, as determined by ASHRAE 52.2–2007, with errata (or equivalent filtration media class of F5 or higher, as defined by CEN Standard EN 779–2002, Particulate Air Filters for General Ventilation, Determination of the Filtration Performance or projects in East Asia may use filtration media classified as medium efficiency (中效过滤器) or higher as defined by Chinese standard GB/T 14295-2008（空气过滤器）), are installed at each return air grille and return or transfer duct inlet opening such that there is no bypass around the filtration media.