How long does a person need to stay in an air shower?

Standard validated cleanroom air shower cycles are 15 to 20 seconds with a nozzle velocity of 20 to 25 m/s. A minimum of 15 seconds is required to achieve a 95%+ particulate de-dusting efficiency for cleanroom apparel.

How many people can pass through a single-person air shower per hour?

With a 15-second blow cycle plus 8 seconds for door open, interlock delay, and walking through, a single-person unit handles approximately 2.5 persons per minute, or 150 persons per hour continuous flow.

Air Shower Traffic & Sizing Calculator

ENGINEERING SIZING RESULT

REQUIRED THROUGHPUT: 5.3 PERSONS / MINUTE

RECOMMENDED MODEL: 1 × BJ1400-D-QP-2 (DOUBLE AIR SHOWER)

Cycle Analysis & Sizing Breakdown

With 80 workers entering across 15 minutes, you need a throughput of 5.3 persons/min. A single BJ900 handles only 2.6 persons/min (bottleneck risk). We recommend 1 unit of BJ1400 double air shower (5.2 persons/min capacity) or a continuous walk-through tunnel.

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BJ-Series Air Shower Capacity Reference Chart

Model Number	Chamber Type	Capacity per Cycle	Throughput (15s cycle)	Max Recommended Shift (15 min)	Nozzle Count & Velocity
BJ900-S-QP-1	Single Person Single Blow	1 Person	2.6 Persons / min	Up to 40 Persons	12 Nozzles · 20-25 m/s
BJ900-D-QP-1	Single Person Double Blow	1 Person	2.6 Persons / min	Up to 40 Persons	16 Nozzles · 20-25 m/s
BJ1400-D-QP-2	Two Person Double Blow	2 Persons	5.2 Persons / min	Up to 80 Persons	18 Nozzles · 20-25 m/s
BJ1900-D-QP-3	Three Person Extended	3 Persons	7.8 Persons / min	Up to 120 Persons	24 Nozzles · 20-25 m/s
BJ2400 / BJ2900	Walk-Through Tunnel	4–6 Persons	12–15 Persons / min	150–250 Persons	32–48 Nozzles · 20-25 m/s