ABSTRACT
High efŸciency Ÿltration protects against the intrusion and spread of airborne pathogens and allergens in the hospital environment. Given that the ventilation system performs according to guidelines and design parameters, Ÿltration is a critical component for controlling airborne pathogens. Filters remove ambient environmental microbes from the outdoor air and microbes produced indoors from human reservoirs and other sources. Filters are required for a variety of hospital facilities including general wards, isolation rooms, and operating rooms. This chapter addresses the effectiveness of Ÿltration for controlling hospital air quality based on both empirical evidence and analytical evaluation.
