Pressure Room (other)
A pressure room may refer to: * A positive pressure enclosure, which uses positive pressure to remove harmful substances from the enclosure * A negative pressure room Negative room pressure is an isolation technique used in hospitals and medical centers to prevent cross-contamination from room to room.

Positive Pressure Enclosure
__NOTOC__ A positive pressure enclosure, also known as a welding habitat or hot work habitat, is a chamber used to provide a safe work environment for performing hot work in the presence of explosive gases or vapors. They are used most often in welding environments and are associated with the offshore oil industry. A positive pressure enclosure works by providing a constant inflow of breathable air, which in turn, causes gas to be continuously removed from the chamber. This outflow of gases prevents the ingress of explosive gases or vapors, which are often present in such work locations. This constant outflow of gases from the chamber also serves to cleanse the air within of undesirable gaseous by-products of the welding process. Most commercial versions of positive pressure enclosures are referred to by their manufacturers as ''habitats''. The qualities of good indoor air qualitshould include comfortable temperature and humidity, adequate supply of fresh outdoor air, and ...
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Positive Pressure
Positive pressure is a pressure within a system that is greater than the environment that surrounds that system. Consequently, if there is any leak from the positively pressured system it will egress into the surrounding environment. This is in contrast to a negative pressure room, where air is sucked in. Use is also made of positive pressure to ensure there is no ingress of the environment into a supposed closed system. A typical example of the use of positive pressure is the location of a habitat in an area where there may exist flammable gases such as found on an oil platform or laboratory cleanroom. This kind of positive pressure is also used in operating theaters and ''in vitro'' fertilisation (IVF) labs. Hospitals may have positive pressure rooms for patients with compromised immune systems. Air will flow out of the room instead of in, so that any airborne microorganisms (e.g., bacteria) that may infect the patient are kept away. This process is important in human and c ...
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