HEPA Filters for Cleanrooms, HVAC & Critical Environments

Need a HEPA filter or replacement? Send us your filter photo, dimensions, efficiency requirement, airflow, and application for technical review.

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Explore Our HEPA Filter Types

Different applications require different HEPA filter constructions. Selection should consider airflow, pressure drop, available installation space, sealing method, and operating conditions.

Mini-Pleat HEPA Filters

Mini-pleat HEPA filters use closely spaced media pleats to provide a large filtration area within a compact frame.

They are commonly used in cleanroom terminal filtration, fan filter units (FFUs), laboratories, pharmaceutical environments, and electronics manufacturing.

Key specifications include filter depth, rated airflow, pressure drop, frame material, and gasket or gel-seal configuration.

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Deep-Pleat HEPA Filters

Deep-pleat HEPA filters use deeper media folds with separators or suitable spacing structures to maintain air passages through the filter pack.

Depending on the design, they may be used in industrial air handling units, critical ventilation systems, and replacement applications requiring deeper filter construction.

Selection should consider frame depth, separator design, airflow, resistance, and housing compatibility.

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Gel-Seal HEPA Filters

Gel-seal HEPA filters use a gel-filled channel designed to interface with a compatible knife-edge housing.

When properly installed, this sealing configuration helps minimize bypass leakage at the filter-to-housing interface.

They are commonly used in selected cleanroom terminal filtration systems and controlled manufacturing environments.

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V-Bank HEPA Filters

V-bank HEPA filters arrange multiple high-efficiency media packs within a rigid multi-V structure.

This design provides increased media area within a defined installation footprint and can be suitable for selected high-airflow HVAC and industrial filtration applications.

Rated airflow, initial pressure drop, filter class, frame dimensions, and sealing requirements should be confirmed for each model.

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High-Temperature HEPA Filters

High-temperature HEPA filters are designed for selected industrial processes requiring high-efficiency filtration at elevated temperatures.

Applications may include specialized drying systems, industrial ovens, and thermal process ventilation.

Temperature capability depends on the complete filter construction, including media, frame, adhesives, sealants, and gaskets. Operating limits must be confirmed by product model.

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H13 vs H14 HEPA Filters

H13 and H14 are HEPA classifications under EN 1822, based on filtration performance at the Most Penetrating Particle Size (MPPS).

H14 provides a higher minimum efficiency classification than H13, but it is not automatically the better choice for every system.

Efficiency should be evaluated together with airflow, pressure drop, filter construction, available fan capacity, sealing, and application requirements.

The right HEPA filter is determined by system requirements—not efficiency class alone.

How to Select the Right HEPA Filter

A HEPA filter should be selected according to its actual operating conditions and housing requirements.

Two HEPA filters with the same nominal size and efficiency class may have different airflow ratings, pressure drops, and sealing arrangements.

Replacement filters should match the housing and operating requirements—not simply the nominal dimensions.

HEPA Filter Applications

Clean-Link HEPA filters support a range of commercial, industrial, and controlled-environment applications.

Cleanrooms and Pharmaceutical Facilities

High-efficiency terminal filtration for specified cleanroom and controlled production environments.

Laboratories and Research Facilities

Particulate filtration for laboratory ventilation and selected clean-air equipment.

Healthcare HVAC Systems

HEPA filtration for healthcare spaces and systems where required by the applicable ventilation design.

Semiconductor and Electronics Manufacturing

Particle control for sensitive manufacturing and precision production environments.

Industrial HVAC and Critical Equipment

High-efficiency filtration for selected industrial air handling systems, critical processes, and equipment applications.

Each application may have different requirements for airflow, efficiency, sealing, installation, and testing.

Airflow, Pressure Drop and Filter Sealing

HEPA filter performance depends on both the filter and the system in which it operates.

Airflow and Pressure Drop

Pressure drop represents resistance to airflow through the filter. As particles accumulate, resistance generally increases.

Depending on system controls, this may reduce airflow or increase fan demand when airflow is maintained.

Suitable upstream pre-filtration can help reduce particle loading on the HEPA stage and support more predictable maintenance.

Frame Fit and Sealing

Even high-efficiency media cannot deliver the intended installed performance when air bypasses the filter.

Important considerations include gasket condition, gel-seal compatibility, frame fit, housing condition, and installation quality.

Filtration efficiency only matters when the air actually passes through the filter.

Custom and Replacement HEPA Filters

Clean-Link supports custom HEPA filter configurations and replacement matching for existing filtration equipment.

Project requirements may include:

• Non-standard dimensions and filter depths

• H13 or H14 efficiency requirements

• Different frame materials

• Gasket and gel-seal options

• Airflow and pressure drop targets

• Drawing- or sample-based replacement matching

• OEM and bulk supply requirements

For an existing filter, a photo and actual dimensions are useful starting points. Efficiency, airflow, sealing, and housing compatibility should also be reviewed before confirming a replacement.

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HEPA Filter Quality Control and Testing

HEPA filter quality depends on consistent media construction, frame integrity, sealing, and verified performance under the specified test conditions.

Depending on the product and project requirements, inspection and testing may include:

• Dimensional and frame inspection

• Media-pack and sealing inspection

• Airflow resistance measurement

• Filtration efficiency testing

• Local leakage or scan testing

• Individual testing documentation, where specified

EN 1822 and ISO 29463 provide recognized frameworks for high-efficiency filter classification and testing.

Testing methods, acceptance criteria, and documentation requirements should be confirmed for each project. Factory testing does not replace any required on-site installation or system integrity verification.

For manufacturing capability, customization, and OEM supply information, visit our HEPA Filter Manufacturer page.

Frequently Asked Questions

What is the difference between H13 and H14 HEPA filters?

Under EN 1822, H13 requires at least 99.95% overall efficiency at MPPS, while H14 requires at least 99.995%. Selection should also account for airflow, resistance, and application requirements.

Can HEPA filters be manufactured in custom sizes?

Clean-Link can review custom dimensions, filter depths, media constructions, frame materials, and sealing configurations according to project requirements.

Which HEPA filter is suitable for a cleanroom?

The appropriate filter depends on the cleanroom design, required filtration class, airflow, terminal housing, sealing, and testing requirements. Filter class alone does not determine cleanroom classification.

What is the difference between a gasket-seal and gel-seal HEPA filter?

Gasket-seal filters rely on compression against the housing. Gel-seal filters use a gel-filled channel that interfaces with a compatible knife edge. The selected design must match the housing.

How often should HEPA filters be replaced?

Replacement depends on particle loading, pressure drop, airflow, filter integrity, operating conditions, and facility maintenance requirements. There is no universal replacement interval.

What information is needed for a HEPA filter quotation?

Provide the filter dimensions, efficiency class, application, airflow if available, sealing configuration, quantity, and existing filter photos or drawings.

Related Technical Case Study

Custom H13 HEPA Filter for a Pharmaceutical Cleanroom Retrofit

Explore an illustrative engineering scenario covering non-standard HEPA dimensions, mini-pleat media, gasket sealing, pressure-drop requirements, and installation verification.

Read the Technical Case Study →

Request a HEPA Filter Quote

Need H13 or H14 HEPA filters, custom dimensions, replacement matching, or project-based manufacturing support?

Send Clean-Link your:

Filter Photo + Actual Dimensions + Efficiency Class + Airflow + Application + Quantity

For critical projects, include pressure drop limits, sealing requirements, and testing documentation needs.

Our team can review your specifications and discuss suitable HEPA filter configurations and supply options.

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