negative pressure

**negative pressure**

Negative pressure refers to a condition where the pressure in a given space is lower than the surrounding atmospheric pressure. This concept is commonly used in various scientific, medical, and engineering contexts, such as creating controlled environments, preventing contamination, or facilitating fluid movement. In healthcare, negative pressure rooms help isolate infectious patients by ensuring air flows into the room but not out, reducing the spread of airborne pathogens. Understanding negative pressure is essential for fields including HVAC design, microbiology, and industrial processes.