![]() In a negative pressure room exhaust air is exhausted through the roof of the building. ![]() All other cracks and gaps, such as those around windows, light fixtures and electrical outlets are sealed, since leakage through these gaps can compromise or eliminate room negative pressure.īecause generally there are components of the exhausted air such as chemical contaminants, microorganisms, or radioactive isotopes that must not be released to the surrounding outdoor environment (indeed, the original purpose of the negative-pressure room), any air outlet must, at a minimum, be located such that it will not expose people or other occupied spaces. Except for this gap, the room is as airtight as possible. With a negative pressure room outside air flows into the room through a gap under the door (typically about one half-inch high). Negative pressure is generated and maintained by a ventilation system that removes more air from the room than is allowed to enter the room. Negative room air pressure with additional barriers including an Anteroom, also known as Class Q for quarantine isolation (COVID-19, Tuberculosis, etc.). ![]()
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