![]() Most electronic monitors consist of two main components: a wall-mounted control panel and a sensor. When properly selected and installed, an electronic room-pressure monitor can provide continuous confirmation of the required pressure differential across the room boundary. While the permanent device can be as simple as a flutter strip or calibrated ball in tube, the most reliable way to monitor room pressure is with the use of an electronic pressure monitor. The following are common areas to build a negative pressure environment within hospitals waiting rooms, triage areas, bathrooms, autopsy rooms, soiled laundry areas and decontamination spaces.īoth negative and positive pressure environments are an important and necessary part of a wide range of research and medical environments, maintaining clean conditions in the smallest clinic to the largest hospitals.Image courtesy of RTM Engineering Consultants ![]() Negative air pressure rooms are used in industries that manufacture pharmaceutical products, do biochemical testing and are also a common solution in infection control efforts, for example hospitals use them in inpatient rooms and to quarantine seriously contagious patients. Air is more likely to flow into a negative air pressure room than out of it, ensuring contaminants do not leave. In medical settings these rooms are called Airborne Infection Isolation Rooms (AIIR) and their main function is to protect people outside the room, from exposure. This traps and keeps potentially harmful particles within the negative pressure room by preventing internal air from leaving the space. In contrast with positive air pressure, negative pressure rooms use lower air pressure to allow outside air into the segregated environment. In medical settings, these protected environments allow staff to keep vulnerable patients safe from infections and disease. As an example, computers feature small fans to blow out debris and dust to avoid build up and product failure, while smaller component manufacturers such as those making PCB boards and other computer chips will benefit from positive pressure room to ensure that the newly manufactured parts are not defective from new. Positive air pressure can be applied to both cleanrooms and within finished product, ensuring contaminants and dust don’t affect the product performance. Positive air pressure rooms are common in hospital environments such as human and animal nurseries, vitro fertilisation labs and operating theatres. In medical settings, positive pressure rooms are referred to as protective environments. Positive pressure rooms maintain a high pressure inside the treated area by constantly pushing old air out and in scenarios that must continually filter harmful contaminants out of the environment. ![]() Any contaminants are forced out of the room with the old air, ensuring a clean air supply. The supply fan, also known as the intake fan, replaces the old air with freshly pulled in filtered air. In a positive air environment, the positive air pressure pushes air out of a room by increasing the airflow rate. Usually in multipurpose rooms indication lights on a control panel or display can show the airflow direction status whether positive or negative. ![]() In multipurpose rooms, a well designed ventilation system can switch the flow from positive to negative, and vice versa, depending on the nature of the work being performed. ![]() Maintaining positive or negative air pressure is an important metric in cleanrooms located in hospitals, labs and other manufacturing facilities, ensuring a clean, non contaminated air supply. ![]()
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