Maintaining desired air pressure in respective area is very important to carry out production. Cleanrooms are classified into 2 categories of air pressurization, positive and negative air pressure cleanroom and this gets possible with HVAC (Heating, Ventilating and Air Conditioning) systems.
Positive air pressure cleanroom systems are normally used for Electronics, Aerospace, pharmaceutical, defense applications, and research laboratory, etc., where the air escaping from doors, ceilings, or walls, due to the positive air pressure, is not hazardous and not creating safety or health concerns. The amount of particulate cleanliness required determines the cleanroom design concept, amount of air filtration, CFM (cubic feet per minute) and total HVAC.
There are different cascading levels of positive air pressure from the cleanest rooms at the highest pressure down to the gown room/or airlock room. In order to carry out smooth operation,room pressure should be maintained according to GMP.
Things that keeps cleanroom environment clean:
So balance air pressure of your clean room facility to the designed value and continue flawless production.