Mini-Pleat HEPA Filters

Mini-pleat construction provides a large filter media area within a relatively compact depth. Depending on the filter design and application, this can help balance high filtration efficiency, airflow capacity, pressure drop, installation space, and service life.

Clean-Link offers H13 and H14 project options, aluminum, galvanized steel and other frame configurations, gasket and gel seal designs, standard and custom dimensions, and project-based airflow and pressure drop review.

Mini-Pleat HEPA Filter Products

Mini-Pleat HEPA Filter with Aluminum Frame

Lightweight rigid construction for cleanroom, HVAC, laboratory and equipment applications.

Typical options:

• H13 / H14 project requirements
• Custom dimensions
• Gasket options
• Compact filter depth
• Different airflow requirements

Mini-Pleat HEPA Filter with Galvanized Steel Frame

Rigid construction for selected HVAC, industrial and replacement applications requiring a steel frame.

Typical options:

• Custom size
• H13 / H14
• Box or flange configuration
• Gasket options
• Project-specific airflow

Gel Seal Mini-Pleat HEPA Filter

Designed for compatible terminal housings and cleanroom systems using knife-edge and gel-seal arrangements.

Typical options:

• H13 / H14
• Aluminum frame
• Custom dimensions
• Gel channel configuration
• Terminal installation

View Product →

High Airflow Mini-Pleat HEPA Filter

Mini-pleat configurations designed for applications where high airflow and compact filter construction must be balanced with system resistance.

Typical options:

• Large media area
• Custom airflow
• Different depths
• H13 / H14
• Rigid frame construction

What Is a Mini-Pleat HEPA Filter?

A mini-pleat HEPA filter uses closely spaced pleats to fit a large amount of filtration media into a compact filter pack.

Instead of relying on the deeper separated pleat structure used in many traditional deep-pleat HEPA filters, mini-pleat designs typically use closely controlled pleat spacing to maintain airflow paths through the media.

This design can provide:

• High media area
• Compact filter depth
• High-efficiency particle filtration
• Good airflow capability
• Pressure drop optimization
• Flexible frame and sealing configurations

The actual performance depends on media type, pleat geometry, filter dimensions, rated airflow and final filter construction.

Advantages of Mini-Pleat Design

High Media Area in a Compact Structure

One of the main advantages of a mini pleat HEPA filter is the amount of filter media that can be incorporated into a relatively compact frame.

More usable media area can help reduce face velocity through the media and support a practical balance between filtration efficiency and resistance.

This is particularly useful where installation depth is limited.

Pressure Drop and Airflow Optimization

Mini-pleat construction is often selected when system designers need high-efficiency filtration while managing airflow resistance.

However, “mini-pleat” does not automatically mean every filter will have a low pressure drop.

Actual pressure drop depends on:

• Filter dimensions
• Media area
• Pleat depth and spacing
• HEPA media
• Rated airflow
• Face velocity
• Efficiency class
• Filter loading

Clean-Link can review airflow and pressure drop requirements when selecting or customizing a mini-pleat filter.

Compact Installation

Mini-pleat filters can provide a large media area without requiring the same depth as some traditional deep-pleat configurations.

This makes them suitable for applications such as:

• Cleanroom ceiling modules
• Terminal HEPA housings
• Compact AHUs
• Equipment filtration
• Retrofit systems
• OEM air handling equipment

H13 and H14 Mini-Pleat HEPA Filters

Clean-Link supports H13 and H14 mini-pleat HEPA filter requirements for projects where high-efficiency final filtration is specified.

Efficiency class should be selected according to the application, system design, airflow, pressure drop, sealing arrangement and project standard.

Relevant technical references may include EN 1822 and ISO 29463 for high-efficiency filter classification and testing.

Higher efficiency should not be selected in isolation. The filter must also be compatible with the system's airflow and resistance capability.

Related guide: Understanding HEPA Filter Efficiency →

Frame Options

Mini-pleat HEPA filters can be manufactured with different frame materials depending on installation and application requirements.

Frame selection should be considered together with dimensions, filter weight, seal design and installation method.

Gasket and Gel Seal Options

The sealing interface between the HEPA filter and housing is important because air bypass can reduce actual system performance.

Clean-Link can support:

• Upstream gasket
• Downstream gasket
• Full-face gasket
• Custom gasket position
• Gel seal configuration
• Flange frame
• Box frame
• Housing-specific sealing arrangements

For gel seal filters, buyers should confirm the existing housing and knife-edge configuration before production.

Related guide: Air Filter Bypass Leakage: Frames, Gaskets and Installation →

Standard and Custom Mini-Pleat HEPA Filter Sizes

Clean-Link supplies both standard and custom mini pleat HEPA filters.

Custom requirements may include:

• Length
• Width
• Depth
• Frame thickness
• Flange dimensions
• Gel channel dimensions
• Gasket position
• Airflow direction
• Rated airflow
• Pressure drop target
• Efficiency class

For replacement projects, actual dimensions should be confirmed rather than relying only on nominal HEPA filter size.

If a standard size does not fit your housing, Clean-Link can review a drawing, existing filter or measured dimensions.

Custom HEPA Filters →

Typical Applications

Mini-pleat HEPA filters are used in applications where high-efficiency filtration, compact installation and controlled airflow are important.

Common applications include:

• Cleanrooms
• Pharmaceutical production
• Biotechnology facilities
• Laboratories
• Electronics manufacturing
• Semiconductor-related production
• Commercial HVAC final filtration
• Industrial high-efficiency filtration
• Terminal HEPA modules
• OEM equipment
• Replacement HEPA systems

For cleanroom projects, the filter is one part of the overall controlled environment. ISO 14644 provides the broader cleanroom classification context.

Cleanroom Air Filtration →

How to Select a Mini-Pleat HEPA Filter

Before requesting a quotation, confirm the following information whenever possible:

For replacement filters, an existing filter photo or drawing can be especially useful.

Custom Mini-Pleat HEPA Filter Support

Clean-Link can support mini-pleat projects that require more than a standard product.

Customization may include:

• Non-standard dimensions
• H13 or H14 project requirements
• Rated airflow matching
• Pressure drop review
• Different frame materials
• Gasket configuration
• Gel seal design
• Flange options
• OEM packaging
• Drawing-based production
• Existing sample matching
• Repeat supply programs

For highly customized projects, visit:

Custom HEPA Filters →

For broader manufacturing capability:

HEPA Filter Manufacturer →

Request a Mini-Pleat HEPA Filter Quote

Need mini-pleat HEPA filters for a cleanroom, HVAC system, industrial project or OEM application?

Send Clean-Link:

• Filter dimensions
• H13 / H14 requirement
• Rated airflow
• Pressure drop requirement, if available
• Frame material
• Gasket or gel seal requirement
• Application
• Quantity
• Existing filter photo or drawing

If you do not have the full specification, start with:

Photo + dimensions + application

Clean-Link can help review what should be confirmed next.

Request a Quote →

FAQ

What are mini-pleat HEPA filters?

Mini-pleat HEPA filters use closely spaced pleated filter media to provide high media area within a compact structure. They are commonly used in cleanroom, HVAC, laboratory, pharmaceutical, electronics and OEM applications.

What is the advantage of a mini-pleat HEPA filter?

The mini-pleat structure can provide high media area in a compact filter depth, helping designers balance filtration efficiency, airflow and pressure drop.

Are mini-pleat HEPA filters available in H13 and H14?

Yes. Clean-Link can support H13 and H14 project requirements depending on filter construction, airflow, dimensions and application specifications.

Are mini-pleat HEPA filters always low pressure drop?

Not necessarily. Pressure drop depends on media area, filter dimensions, pleat geometry, airflow, face velocity and efficiency. Mini-pleat construction provides design flexibility for resistance optimization, but actual values should be reviewed from filter data.

Can mini-pleat HEPA filters be made in custom sizes?

Yes. Clean-Link can manufacture custom mini-pleat HEPA filters based on length, width, depth, airflow, efficiency, frame and sealing requirements.

Can I order a gel seal mini-pleat HEPA filter?

Yes, for compatible systems. The housing design, knife-edge configuration, gel channel dimensions and installation details should be confirmed before production.

Which frame materials are available?

Depending on project requirements, options may include aluminum, galvanized steel, stainless steel and other custom configurations.

What information is needed for a quote?

Provide filter dimensions, efficiency class, rated airflow, pressure drop requirement if available, frame material, sealing method, application, quantity and an existing filter photo or drawing where possible.