Review of ASHRAE Standard 170-2013

Presents the main revised content of the standard, including classification of operating rooms, lower limit of relative humidity, ward ventilation requirement, ventilation and air conditioning system, energy recovery and air filtration. The classification of operating room is changed from three to two. The lower limit of relative humidity is decreased to 20%. The minimum air change rate for ward is changed from 6 h^-1 to 4 h^-1. Presents the revised regulation about ducted return air, calculation of outdoor air rate of multi-zone air conditioning, utilization of indoor recirculating room units and duct lining. Clarifies the detailed requirement of energy recovery and air filtration of health care facilities.