Air Shower Room Selection Guide: Single, Double and Channel Type

Introduction

Air showers are one of the most visible pieces of hygiene equipment at a food or pharmaceutical plant entrance - and one of the most frequently misunderstood. Installed at the boundary between a clean zone and the outside environment, an air shower room uses high-velocity, filtered air to dislodge dust and particles from clothing, footwear and material surfaces before personnel step into production or cleanroom areas.

This guide explains what an air shower room actually does, how single, double and channel type models differ, and how to choose the right configuration for your facility. It is written for plant managers, project engineers and procurement teams evaluating personnel decontamination equipment - whether for a new plant, an extension or a retrofit of an existing dressing room.

Why Install an Air Shower Room at Your Facility Entrance

· People carry particles. Even after boot washing and hand disinfection, clothing can still carry dust, hair and fibres from the outside environment into clean production zones.

· Controlled environments expect particle control. HACCP- and GMP-based food safety programs and cleanroom practices treat the transition into the production area as a controlled point; an air shower makes that control visible, automatic and verifiable.

· It protects product quality. In sensitive processes - ready-to-eat meat, dairy, bakery, beverages and pharmaceutical preparation - airborne contamination is a direct quality and shelf-life risk.

· It standardises the entry routine. A fixed, automatic step in the dressing room sequence removes reliance on individual discipline and keeps the hygiene level consistent across shifts.

HACCP and GMP are general regulatory frameworks referenced here for context only; always confirm the specific expectations of your auditor and target market.

How an Air Shower Room Works

The operating principle of Henger’s air showers follows a closed-loop filtration cycle: a person or item enters the chamber and the doors close; ambient air is drawn through a pre-filter and a HEPA filter; a dedicated fan pressurises the clean air into a static pressure box; high-speed clean airflow is then ejected through adjustable stainless steel nozzles, blowing dust particles off clothing and surfaces; the particle-laden air is recirculated through the filters for continuous cleaning; and when the shower cycle completes, the exit door opens and the person moves into the clean area.

Henger air shower rooms are built from 304 stainless steel with two-stage filtration (pre-filter + HEPA), three-sided nozzle coverage, a digital display with adjustable shower time, and internal air circulation. Both manual door and touchless infrared induction models are available - the choice between them is one of the first decisions in the selection process.

Manual Door or Infrared Induction Models

Henger’s air shower range is organised into two control families. Manual door models are started with a button and use a swing door - simple, reliable and cost-effective. Infrared induction models activate automatically when a person enters, which removes the need to touch door handles or controls - a meaningful advantage in strict hygiene environments.

For food and beverage plants, the infrared induction family is generally the recommended starting point because it removes contact surfaces from the entry routine. Manual models remain a good value option where touchless operation is not yet a hygiene requirement.

Sizing: Single, Double or Channel Type

The second key decision is capacity. A typical shower cycle lasts around 10-20 seconds per person (the cycle time is adjustable, up to 99 seconds on the digital controller), so throughput is mainly a function of chamber width and the number of nozzles. The table below lists the standard models published by Henger.

All models use 304 stainless steel and three-sided shower coverage. As a general engineering rule of thumb: a single unit handles lower headcounts and secondary entrances; a double unit suits main entrance flow; a channel type is for continuous, high-traffic movement. The right answer depends on your peak shift flow and number of controlled entrances - Henger’s engineers can size the unit from your headcount and floor plan.

Custom sizes, nozzle configurations and filtration grades are available on request.

Where the Air Shower Fits in the Dressing Room Sequence

An air shower works best as one step in a complete entry sequence: change footwear and store items, clean boots, wash and disinfect hands, then pass through the particle barrier before the final production door. In most food plants the compact tabletop boot washing machine (HE-HCDS19) handles boot hygiene, while touchless hand wash & disinfection stations cover hand hygiene - with the air shower room positioned directly before the controlled area. Because all of these products come from a single manufacturer, the whole zone can be engineered as one integrated system with consistent stainless steel quality and one service contact - see Henger’s Complete Dressing Room Hygiene Solution for the full system view.

Industry Applications

Air shower rooms are used wherever a controlled boundary must be protected. Henger publishes the following application segments:

FAQ

Q1: What is an air shower room used for?

An air shower room is a local purification device installed at the transition between clean and non-clean areas. It uses high-velocity filtered air to remove dust and particles from personnel and goods before they enter a cleanroom or controlled production zone.

Q2: What is the difference between manual and infrared induction models?

Manual models are started with a button and use a swing door - simple and cost-effective. Infrared induction models activate automatically when a person enters, which removes contact with handles and controls - preferred for stricter hygiene protocols such as food processing and pharmaceutical applications.

Q3: How many air showers does my plant need?

It depends on peak shift throughput and the number of controlled entrances. As a rule of thumb, a single unit suits secondary entrances and lower headcounts, a double unit handles main entrance flow, and a channel type suits continuous high-traffic movement. Henger can size the unit from your headcount and floor plan.

Q4: What filtration do Henger air showers use?

Two-stage filtration: a pre-filter captures larger particles, then a HEPA filter removes finer contaminants. Air recirculates internally within the chamber for consistent performance, and filtration grade can be customised on request.

Q5: Can the air shower be customised?

Yes. External dimensions, nozzle count and arrangement, filtration grade, control mode and shower duration can all be configured. Custom designs for unique facility layouts are available.

Q6: Where should the air shower be installed?

At the boundary between the clean and non-clean areas - typically after changing, boot washing and hand hygiene, directly before the production door. Henger provides free layout drawings and configuration proposals for new and retrofit projects.

Closing Call to Action

An air shower room turns a hygiene requirement into a visible, automatic process - and choosing the right configuration is a matter of matching control type, size and position to your plant’s real flow. Start with your entry sequence, decide between manual and touchless operation, and size the chamber to peak throughput.

If you are planning a new dressing room or upgrading an existing entry, Henger’s engineering team can prepare a free layout drawing and quotation tailored to your facility. Request a quote today via the contact form, email info3@hengerchina.com, or WhatsApp +86 188 5430 1052.