provided with HEPA filtration. 15/2 total and outside air changes,
respectively, are required for these bedrooms. As with disease isolation
bedrooms, there are several recognized approaches to the relative corridor-
anteroom-bedroom pressurization; A recommended approach is to establish
the anteroom positively pressurized relative to the corridor, and
negatively pressurized relative to the bedroom.
Existing Facilities. When upgrading existing protective
isolation bedrooms to this criteria, 15/2 air changes per hour shall be
provided if economically and physically practicable. When impractical,
these bedrooms shall be provided with a minimum of 6 total air changes per
hour and supplemented by HEPA filtration or UVGI systems to provide the
equivalent of 15 air changes.
Disease Isolation Exam or Waiting Rooms. Disease isolation
exam or waiting rooms shall be provided with a minimum of 12 total air
changes, as provided in Appendix A, with the room air exhausted to the
American Society of Heating, Refrigerating and Air-Conditioning
Engineers, Inc. (ASHRAE) HANDBOOK Series.
ACGIH, "Manual of Recommended Practices for Industrial
NFPA 99, "Standard for Health Care Facilities."
NFPA 90A, "Standard for the Installation of Air Conditioning and
NFPA 96, "Cooking Equipment, Vapor Removal."
NFPA 801, "Facilities for Handling Radioactive Materials."
NFPA 45, "Labs Using Chemicals".
NFPA 101, "The Life Safety Code".
Joint Services Manual TM 5-785, NAVFAC P-89, AFM 88-29,
"Engineering Weather Data" .
ASHRAE 15, "Safety Code for Mechanical Refrigeration".
ASHRAE 34, "Number Designation and Safety Classification of
SMACNA, "HVAC Duct System Design".
NFPA 70, "National Electrical Code".
UL 181, "Standard For Safety, Factory-Made Air Ducts".