The purpose of this study was to conduct a reviewof ANSI/ASHE/ASHRAE Standard 170‐2013 – Ventilation of HealthcareFacilities to determine whether the 886 requirements defined in theStandard (Part 4 of the FGI Guidelines) are supported by engineering and (or)scientific evidence. This process began by assembling each of the requirementsinto a comprehensive spreadsheet (Appendix A). From this, the authors and the ProjectMonitoring Subcommittee (PMS) assigned these requirements into one of three (3)categories: Rational inclusion defines requirements that fall under practicalengineering or life-safety requirements; Clinical inclusion definesrequirements that support clinical practices; Evidence-based inclusion definesthose remaining requirements that are supported by published scientificliterature.