Where to Install a Cleanroom Air Shower
                     Where to Install a Cleanroom Air Shower
An air shower should be installed at the entrance of the clean area, so that people pass through it 
after putting on cleanroom garments and just before entering the cleanroom. It works as an airlock-
style chamber between the gowning area and the controlled space.
Cronax Industries supplies cleanroom equipment, and this short guide covers the correct position 
and what to check before you install one.
What an Air Shower Does
A cleanroom air shower blows filtered air at high speed onto a person standing inside the chamber. 
This removes loose particles from the surface of the garment. The air then passes through a filter 
before it is released, so the particles do not travel into the clean area. Most units have two 
interlocked doors.
It removes loose surface particles only. It does not replace proper gowning, cleaning or hygiene 
practice.
The Correct Installation Spot
• After the gowning room: people should already be wearing cleanroom garments when they 
enter the air shower.
• Before the cleanroom: the exit door of the air shower should open into the clean area.
• On the only entry route: there should be no other open path for personnel to walk around it.
Personnel entry route
Changing Room Gowning Room AIR SHOWER Cleanroom
street clothes off cleanroom garments on install here controlled area
Last step before the clean zone
Material entry route (separate from personnel)
Materials Pass Box Cleanroom
outside / store or material shower controlled area
Where Not to Install It
• Before the gowning area, where people still wear street clothes
• At a point where staff can bypass it through another door 
• In a spot where the exit route is blocked
• In a place that does not suit your pressure design between rooms
Checks Before Installation
• Space: floor area, ceiling height and door swing
• Power: electrical supply and cable route as per the unit's requirement
• Wall opening: how the unit fits into the cleanroom panels
• Pressure design: confirm the position with your cleanroom designer
• Service access: room to reach and change filters
People and Material Entry
Personnel and materials should preferably use separate routes. People use a personnel air 
shower. Materials normally go through a pass box or a material air shower. Check your site 
procedure for the exact arrangement.
Choosing a Unit
Once the position is fixed, choose the size, filter and controls to suit it. You can see the range of a 
cleanroom air shower from Cronax Industries and compare it with your entry space.
Note
An air shower is not required in every cleanroom. Whether you need one depends on your 
process, cleanroom class and applicable standards. Confirm the final layout with your cleanroom 
consultant.