The changes included in this proposed addendum are primarily intended to coordinate with the 2010 Guidelines for the Design and Construction of Health Care Facilities. Specific changes include: - the addition of two new definitions: ôabsorption distanceö and ôessential accessoriesö; - a change to Section 5 to clarify that ôequipmentö refers to non-HVAC equipment, new 6.4.4 to minimize air leakage around filters; - new 6.7.3 on smoke barriers; - new 6.7.4 on smoke and fire dampers; - new 6.7.5 on duct penetrations; - new 6.8 on psychiatric patient areas; and - new 7.5.2 to improve infection control in spaces where patients are likely to be coughing.