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Air Showers

Air showers remove surface contamination from clothing and cleanroom garments while enhancing your cleanrooms performance. Gowning/changing rooms are the areas between dirty 'street clothes' and the cleanroom environment. Unfortunately, the changing or gowning process itself releases contaminants from street clothes into the air, that settle onto the cleanroom garments. Air showers blow off and remove much of this contamination preventing it from entering the cleanroom.

How does an Air Shower Work?

Air showers produce high pressure air, that is then filtered through a HEPA/ULPA filter, and exits out at a high velocity, directly towards the individuals in the shower through adjustable nozzles. The high velocity air removes surface particles and "flaps" the garment to remove particles more firmly attached. The air is then cleaned and re-circulated back into the high pressure blower, where its prefiltered. This high-velocity air removes surface particles and also 'flaps' the garments to dislodge more firmly attached particles. After cleaning, the air is re-circulated back to the high-pressure blower, where it is prefiltered, then HEPA/ULPA filtered and then ducted back to the adjustable high-velocity cleaning nozzles. The air shower utilizes an adjustable microprocessor controller to allow easy on-site adjustment of the cleaning cycle time and other critical process controls.

Popular Air Shower Designs

CleanPro CAP701KD_ST Air Shower

Standard Air Showers

Air showers quickly and effectively remove particles so that they will not be carried into your cleanroom. These decontamination air showers feature rugged construction and adjustable, high velocity air jets.

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CleanPro CAP701LP-ST Air Shower

Low-Profile Air Showers

Low-profile air showers have a side-mounted blower assembly, HEPA filter and electrical components, making them ideal for retrofits or where ceilings can’t be penetrated.

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CleanPro CAP701PT-ST Air Shower

Pass-Through Air Showers

Pass-Through Air Showers offer an effective way to remove surface-deposited particles from large materials as you transfer them into the clean room. They can be used with carts, conveyors, pallets and continuous-part operations.

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The CleanPro® Advantage

An air shower can be compared to a vacuum cleaner in many ways. They are available in a variety of sizes, capacities and features; some work very well while others just seem to make noise. To be effective, they need to have high cleaning force and power.

Superior Performance

Some air showers have a small blower/motor, low airflow and low pressure. These under-powered devices give air showers a bad name. CleanPro® air showers have a high velocity and a large air volume rate for fast, efficient cleaning. Our air showers offer the highest velocities combined with a large airflow rate to provide an air shower that quickly and efficiently cleans particulates from the surface of clean room garments.

Superior Construction Materials

CleanPro® standard air showers are constructed of an all-metal, painted steel shell with no wood or plastic laminate and is entirely silicone-free. The standard shower has a 16-gauge steel shell, heavy-duty glass door and door closer. The shell and concealed air ducts are finished with a white powder coat paint which provides a strong, durable cleanroom-compatible finish. The all-steel shell design will stand up to the rigors of shipping, installation, use, and the occasional abuse of a high-traffic entry system. While we don’t recommend it, you could hit the metal shell of the air shower with a hammer. It may dent or scratch the paint, but you would not break the cabinet as you would with laminated types of construction. The steel construction also reduces the chances of biological growth and contamination caused by systems using laminated particle board in the construction. Laminated particle board construction is fine for a simple table, but not for an important piece of equipment that is being integrated into your cleanroom system.

A typical laminated particle board air shower has the plastic laminate on the outside, but often the interior concealed air ducts are just painted over the raw particle board, leaving a rough surface finish that harbors dirt and biological contamination. As the particle board ages and deteriorates, parts will flake off, becoming another source of contamination. All-metal (painted steel or stainless steel) air showers are the best type of air shower to purchase.

Superior Service Access

Service to the mechanical equipment, blower, motor, HEPA filter and prefilter is easily done from the inside of the air shower through a hinged access panel located in the interior ceiling of the air shower. This is desirable because you don’t have to penetrate the clean room ceiling surrounding the air shower for maintenance. Often the area around the air shower is not accessible because of ceiling filters, lights, ducts, pipes, walls or other equipment. Exterior-mounted service panels would make maintenance difficult or impossible in those cases. Our electrical control panels are conveniently mounted on the outside of the air shower above one of the entrances, and is serviced from outside the air shower.

Air Shower Floor Plans

Air Shower Designs

Air Tunnel Floor Plans

Air Shower Designs

Standard Air Shower Features

Shell Construction
This air shower is constructed of an all-metal, painted steel shell with no wood or plastic laminate and is entirely silicone free. The shell and concealed air ducts are finished with a white powder coat paint which provides a strong, durable, cleanroom-compatible finish.
Service Access
Mechanical equipment like the blower, motor, HEPA filter and prefilter can be easily serviced from inside the shower, through a hinged access panel on the ceiling. The shower's electrical control panel is conveniently mounted above one of the entrance doors and can be serviced from outside the shower.
The doors have heavy-duty aluminum frames and full length clear safety glass viewing windows. The door assembly has a clear anodized finish on both the door and door frame. Each door is furnished with heavy-duty door hinges and a door closer.
Electrical Supply
The standard requirement for the air shower is a 208V 60Hz, three-phase, four-wire. Typical units are 13.6 FLA per blower section. Multiple sections would increase the total power required. Motor starters and disconnects on the main control panel are provided as standard. They are mounted above one of the doors going into the air shower as standard. Local code or installation conditions may require an additional disconnect switch.
Electrical Control Panel
The electrical control panel is a gray painted steel and located about one door on the exterior of the unit. You can find the starter, thermal overloads, fuses, relays, power shut off and a microprocessor controller (PLC) on the control panel. The PLC times the cleaning cycle, controls the optional interlocking of the doors and starts the air shower.
Microprocessor Controller
This controls the starting of the air shower, making it so the shower will only start when people are moving through in one direction. On applications where there the shower is both the entrance and exit from the cleanroom, the shower will only start when people are going into the cleanroom, not when they are exiting it. You can adjust the cleaning time sequence is adjusted by turning a potentiometer on the face of the controller. There is one knob to adjust cleaning time (0-180 seconds) and one for controlling the purge or wait time (0-15 seconds), which is the length of time after the cleaning cycle before the doors unlock.
Wall Start Switch
This is standard without the door interlock magnets options. When entering the shower, a person will need to press a start button to activate the cleaning cycle. If you order the door interlock magnets, the unit uses the opening of the door(s) to initiate the cleaning cycles.
Standard units include an interior LED lighting with an interior wall light switch.
Exit Light Indicator Sequence
The following sequence is part of the standard microprocessor controller program, but must be turned on at installation. The interior fluorescent light of the air shower is normally off to conserve power and to indicate that it is okay to enter the air shower. When either door opens, the internal fluorescent light turns on and will stay on through the cleaning cycle and purge/wait time. When the wait time ends the interior light will flicker off and on to indicate it is okay to exit the shower. The light will remain on while people are in the air shower, but it will turn off when exit door has shut, indicating it is okay to enter the air shower again. In most cases, the same people who use the air shower are trained in gowning and cleanroom protocol. With the same people using the air shower every day, the automatic turning on and off of the interior light works extremely to indicate when they can enter and exit the shower.
The blower wheel is an energy efficient backward-curved aluminum airfoil that is direct-drive-mounted to an efficient 5HP, three-phase motor with sealed ball bearings for low maintenance and long life. The complete assembly is vibration isolated from the rest of the air shower. The blower assembly is mounted on top of the unit and is serviced through an access panel on the interior of the air shower.
The system uses a high-capacity 24" x 24" x 12" deep HEPA wood-framed filter that has a 99.97% efficiency DOP test rating on 0.3 micron particles, that can be service through an access panel on the interior ceiling. The four 10" x 20" high efficiency pleated prefilters are located on the lower internal side walls behind a hinged perforated grill to allow easy access. If the raised floor option is ordered, the prefilters are located in the floor grate.
Air Nozzles
There are 32 adjustable air nozzles in each standard air shower section, 16 per side, providing a uniform concentration of nozzles for fast, effective cleaning. Each nozzle is constructed of aluminum with a clear anodized finish. Their inside diameter is 1.2", with approximately 7,800 LFPM (9,000 LFPM peak) nozzle velocity, providing more cleaning force to dislodge particles and other contaminants. (Peak velocity is the highest velocity measured at the outlet of the nozzles).
Air Flow Capacity
The air shower provides approximately 1,900 CFM total. With this high air flow volume (power), and the high nozzle velocity (force), the people inside the air shower are cleaned faster and more effectively.
Sprinkler Sleeve
The air shower comes with an internal sprinkler sleeve, allowing the sprinkler pipe and head to easily be installed.
Flooring Inside the Air Shower
The standard air shower uses the existing building floor.

Optional Features

External and Internal Magnetic Interlocks
With the door interlock magnets, a door start switch is used and the wall start switch is eliminated. A low-voltage magnetic door interlock prevents both doors from being opened at the same time. When one door is opened, the other door’s magnet is energized which prevents the door from opening. During the cleaning cycle, both doors magnets are energized (locked) to prevent anyone from entering or leaving before the cycle is completed. When door interlocks are installed, three 'emergency power off' (EPO) panic buttons are provided on the interior and both exterior ends of the shower. When the EPO button is pressed, the interlock magnets deactivate and both doors can be opened. Also, an audible alarm sounds that alerts individuals to the emergency condition. A dry contact option (for a remote sensor or alarm) is available to indicate that the EPO system has been activated. The alarm is turned off by a key switch on the inside wall of the air shower.
Standard Program Sequence with Door Interlock Magnets
Traveling from Gown Room into the Cleanroom:
  • Gown Room Door A opens, cleanroom Door B locks (magnetic interlock).
  • Door A shuts, both Door A & B lock and cleaning cycle starts.
  • At the end of the cleaning cycle both doors remain locked 0 to 15 seconds (adjustable) for the purge/wait time.
  • At the end of wait time, Door B unlocks (people can leave air shower) but Door A stays locked until people have left the air shower and Door B shuts.
  • When Door B shuts, both Door A and B are unlocked and people can enter the air shower from either direction.
Traveling from the Cleanroom to the Gown Room:
  • Door B opens, Door A locks.
  • Door B shuts, Door A unlocks.
  • Door A opens, Door B locks.
  • People exit the shower.
  • Door A shuts, both Door A and B are unlocked.

Note: It is very easy to reverse the door sequence that starts the air showers, so rather than Door A starting, the cleanroom Door B can start the air shower.

Stainless Steel Walls and Cabinet
With the stainless steel shell option, the shell of the exterior and interior air shower is stainless steel. Parts located in the blower compartment behind the interior access panel, i.e., blower, motor, filter support clamps, etc., are standard painted or plated materials and not stainless steel. Consult the factory for further details.
Stainless Steel Control Box
The standard gray painted steel main electrical control box mounted above one door on the exterior of the cabinet is replaced with a stainless steel control box.
Stainless Steel Pharmaceutical Package
CleanPro® air showers have a special set of options specifically designed for pharmaceutical and other applications where microbial contamination is a concern.
How does Garment Type Influence Cleaning Effectiveness?

Types of garments, size, shape and type of contamination affect the cleaning effectiveness of the shower. Lint, hair, dander, skin flakes and other large, light particles are the easiest to remove. Contaminating particles adhere to garments in two ways: Either by mechanical entrapment, or an electrical attraction. You can reduce mechanical bonds between the garment and particulate by using smooth surface, cleanroom designed garments made form synthetic materials like Tyvex, Gortex, polyester and nylon. These low shedding materials minimize the mechanical bond, making it easier to blow surface contamination off the garment. Natural fibers like cotton, tend to shed particles and have a higher mechanical bond with particulates making them harder to clean. Synthetic garments can develop a static charge, that can hold particles.

Laundering your garments with "anti-static" agent in the final rise will reduce the level of static charge, allowing particles to be more readily removed. Some garments are available with special built-in conductive fibers that can assist in keeping the surface charge to a minimum. Consult your garment supplier for details. Installing point ionization (static neutralization) on the inside walls dissipates some of the charge on garments, reducing the holding charge of the garment, making it easier for the air to blow off particulates. Much of the contamination of a cleanroom is carried in on the garments of people working inside the room, bringing it into the most critical area. With out air showers, people are often cleaner when leaving the cleanroom because a large portion of contaminates that were on their garment, have fallen off. Using an air shower effectively removes that contamination, that would have otherwise come off in the cleanroom.

How are Air Showers Shipped & Installed?

Air shower can be shipped fully assembled (on its side on the skid) or knocked down with the wall panels off from the upper blower cabinet, allowing the components of the air shower to fit through a standard 3' x 7' door opening when removed from the shipping skid. If the components are required to fit through a different size door, please indicate so in the quote request.

Air showers can be installed so the entire air shower sticks through the wall, with space around the air shower. This space is filled with an optional trim angle. The shower can also butt up against a wall with an opening large enough for the door and related end-mounted hardware (approximately 48" x 90"). Please request a quote before planning cut-outs, as different configurations and sizes may require different cut-out sizes. When the unit is butting against the wall, the contact point between the air shower and the framed opening is typically caulked or a small trim molding is applied. The exterior of the air shower would also have a trim angle.

What is the Typical Installation Process?

When shipped fully assembled on its side, the weight for an air shower is approximately 1,300 lb. Two eye bolts located on the top of the air shower can be used to assist in lifting. After standing up the unit, it is then moved into position and leveled using shim stock and is anchored to the floor (anchors to be provided by the installer).

When the unit is shipping knocked-down, the air shower upper blower cabinet is 650 lbs. The wall panels are 250 lbs. The knocked-down air shower needs room on the sides of the unit during the assembly process to install the 3/8" mounting bolts. To assemble the unit, the blower section is taken off the skid and raised into position. The two wall sections are then bolted from the outside onto the upper blower housing. At this point, the assembly is self-supported. The doors are attached, power is connected, and the unit is ready to run. Assembly is fast and uncomplicated. Each unit is shipped with a detailed manual. We do recommend using mechanical lifts to assist in the assembly process. Once the unit is assembled, no space is required on the sides of the unit. After the unit is assembled, moved into place, and the mounting is complete:

  1. An electrician needs to connect power to the air shower, start the unit, and check blower rotation.
  2. A sprinkler contractor needs to install the sprinkler.
  3. The installer touches up the paint (if needed).
  4. The installer adjusts the doors and door closers (if needed).
  5. The installer adjusts the magnetic door interlocks (if needed).
  6. The installer confirms that high-velocity air is flowing out the nozzles at approximately 90 MPH. If the blower is running backwards, air will still come out of the nozzles, but only at about 15 MPH. Blower rotation can also be confirmed by looking at the blower itself.
  7. The installer cleans the inside of the air shower and the interior floor space.
  8. The installer seals any seams with caulk (provided by the installer) as required.

Request a Free Air Shower Quote

Choose a Model:
Outside Width:
General Options:   Raised Floor Return
  Hazardous Location Design
  Type 304 #4 Finish Stainless Steel Pharmaceutical Package
Nozzles:   Fixed Nozzles
  Concentrated Wall Nozzle Pattern
  Air Knife Design
  Rub Rail Nozzle Protection
  Wall Point Ionization System
Control:   NEMA12 Control box
  Stainless Steel Control Box
  Optional Control Box Position
  Variable Frequency Drive
  Motion Sensor Start
  5.7" Color LCD Display Panel
Filter:   NEMA12 Control box
  Stainless Steel Control Box
  Optional Control Box Position
  Variable Frequency Drive
Doors:   Steel Construction - Painted
  Stainless Steel Construction
  Acrylic Panel - Full
  Split Panel Design - Safety Glass/Stainless Steel
  Split Panel Design - Acrylic/Stainless Steel
  Door Rub Rails
  Magnetic Interlocks - External Mount
  Magnetic Interlocks - Internal Mount
  Door Sweeps - Fixed
  Automatic Door Sweeps
Special Configurations:
Additional Questions or Comments:

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Special Configurations

Standard and low profile air showers can be ordered in a range of configurations.

90 Degree Right Hand
90 Degree Right Hand
Right Hand turn through the air shower.
90 Degree Left Hand
90 Degree Left Hand
Left Hand turn through the air shower.
Three Door Right Hand
Three Door Right Hand
Multiple entrance and exit combinations.
Three Door Left Hand
Three Door Left Hand
Multiple entrance and exit combinations.
2 Unit Tunnel
2-Unit Tunnel
Straight Thru air shower 2 sections deep.
3 Unit Tunnel
3-Unit Tunnel
Straight Thru air shower 3 sections deep.
4 Unit Tunnel
4-Unit Tunnel
Straight Thru air shower 4 sections deep.
5 Unit Tennel
5-Unit Tunnel
Straight Thru air shower 5 sections deep.
Double Doors
Double Doors
When a single door isn't wide enough.
Double Doors 2-Unit Tunnel
Double Doors 2-Unit Tunnel
Double Doors 3-Unit Tunnel
Double Doors 3-Unit Tunnel
Double Doors 4-Unit Tunnel
Double Doors 4-Unit Tunnel
Double Doors 5-Unit Tunnel
Double Doors 5-Unit Tunnel
ADA Complient Straight Thru
ADA Compliant Straight Thru
Meets ADA requirements.
ADA Complient 90 Degree Right Hand
ADA Compliant 90 Degree Right Hand
Meets ADA requirements.
ADA Complient 90 Degree Left Hand
ADA Compliant 90 Degree Left Hand
Meets ADA requirements.