pass box negative pressure clean room

Pass Box Requirements In Negative Pressure Clean Room

Negative pressure clean room is a common method of infection control and is used for airborne disease treatment like COVID-19, SARS, etc. Negative pressure room requires a level of cleanliness strictly. Pass box is ideal equipment that protects negative pressure clean room from contamination. So what are the requirements for pass box used in negative pressure isolation rooms? 

1. Observation window

According to ” Technical Guidelines for Negative Pressure Rooms Construction”, an observation window and pass box should be installed between negative pressure cleanrooms, negative pressure isolation room and the corridor.

2. Fixed sashes

Fixed sashes should be used for the observation window.

3. Double-door interlocking system pass box

The double-door interlocking pass box with UV light is suitable for negative pressure room

The double-door interlocking system of pass box reduces the direct contact inside and outside the room and the number of door openings, which keeps the negative isolation room clean.

4. UV light

The UV light equipped inside the pass box helps remove dust and pathogens on the surface of material during the material transfer. The UV light radiation can killl the bacteria and sterilize the transferred items. This is the difference between passbox in negative pressure room and pass box in other areas.

Pass box requirements of negative pressure isolation rooms are special, due to the use environment. The negative pressure isolation rooms are used to isolate patients with infectious diseases from other patients, healthcare staff. Because the air and particles from these patients are dangerous, they need to be treated specially. The air in the patient’s room need to be filtered before it is pumped outside.

Moreover, the items touched by patients need to be recycled or discarded after sterilization and disinfection. In this process, we need to use the pass box. Pass box reduces the number of door openings and personnel contact. Therefore, pass box plays an improtant role in negative pressure clean room.

5. Pass box material

Pass box in negative pressure clean room made of stainless steel is easy to clean and bears the maximum chemical resistance. Stainless steel pass box enhances durability for long service life.

Moreover, some details could be improved for better service. For example, the round corner design makes the internal chamber of pass box easy to clean.


Vietnam Cleanroom Equipment (VCR) specializes in providing cleanroom equipment for construction contractors. We provide high-quality products with competitive prices and large quantities nationwide. The equipment includes:

Differential pressure gauge, FFU Fan Filter Unit, Pass box, Clean room air filter, HEPA box, Clean booth, cleanroom steel door, Isolator cabinet, and other equipment

For details, please refer to Vietnam cleanroom equipment official website