Custom HEPA Filters Built to Your Exact Project Requirements

Clean-Link manufactures custom HEPA filters for cleanroom, HVAC, industrial ventilation, laboratory, pharmaceutical, electronics, OEM equipment, and replacement filter projects.

This page is for buyers who need a HEPA filter with specific dimensions, airflow, efficiency, pressure drop, frame material, media type, separator design, gasket position, gel seal, flange structure, temperature requirement, application condition, or sample-matching requirement.

If a standard HEPA filter does not fit your housing, equipment, ceiling module, filter bank, or replacement project, Clean-Link can help review your specification and manufacture a custom HEPA filter based on confirmed project requirements.

Request a Custom HEPA Filter Quote →

View HEPA Filter Manufacturer Page →

 

Custom HEPA Filters for Exact Fit and Application Requirements

Not every HEPA filter project can use a standard catalog size.

Many buyers need custom HEPA filters because the existing system has a non-standard filter slot, a special housing, limited installation depth, a defined airflow requirement, a specific sealing method, or a replacement filter that must match an old sample or drawing.

Clean-Link supports custom HEPA filter manufacturing for:

• Non-standard HEPA filter dimensions
• Custom length, width and depth
• Replacement HEPA filters for existing housings
• Mini-pleat HEPA filter projects
• Deep-pleat HEPA filter projects
• Separator HEPA filter projects
• Gasketed HEPA filters
• Gel seal HEPA filters
• Flange or box-type HEPA filters
• High-temperature HEPA filter requirements where applicable
• Cleanroom terminal HEPA filters
• Industrial HEPA filter banks
• OEM HEPA filters for equipment integration

The goal is to manufacture a HEPA filter that fits the system, supports the required airflow, meets the efficiency target, works with the sealing structure, and supports the buyer’s installation and replacement plan.

When Do You Need a Custom HEPA Filter?

You may need a custom HEPA filter when a standard HEPA product cannot meet the installation or performance requirement.

Common situations include:

Non-Standard HEPA Filter Size

Older equipment, imported systems, custom cleanroom ceiling modules, retrofit housings, and industrial filter banks may require special HEPA filter dimensions.

Buyers should confirm:

• Actual length
• Actual width
• Actual depth
• Frame thickness
• Flange dimension
• Installation clearance
• Gasket position
• Airflow direction
• Existing housing structure

A custom size HEPA filter helps reduce fit problems, installation delays, frame mismatch, and bypass risk caused by incorrect dimensions.

Replacement HEPA Filter Matching

Many custom HEPA projects start with an existing filter sample.

Clean-Link can review replacement HEPA filter requirements based on:

• Existing filter photo
• Product label
• Measured dimensions
• Filter construction
• Frame material
• Gasket or gel seal type
• Airflow direction
• Housing photo
• Drawing or old specification
• Quantity and replacement schedule

If the original manufacturer or model is no longer available, a custom HEPA filter can be reviewed based on the physical sample, application and system requirements.

Special Airflow or Pressure Drop Requirement

HEPA filters should be selected according to system airflow and pressure drop capability.

Two HEPA filters may have the same size but different resistance, media area, pleat design, filter depth, and service behavior.

Clean-Link can review:

• Rated airflow
• Face velocity
• Initial pressure drop
• Recommended final pressure drop
• Filter face area
• Media area
• System fan capability
• Prefiltration stage
• Operating hours
• Dust load

A custom HEPA filter should support the required air volume without creating unsuitable resistance for the system.

Gasket, Gel Seal or Flange Requirements

Sealing is a critical part of HEPA filter performance in real systems.

A HEPA filter may have the correct efficiency class, but the system can still lose performance if the frame, gasket, gel seal, flange or housing connection is not properly matched.

Clean-Link can support project review for:

• Upstream gasket
• Downstream gasket
• Full-face gasket
• Foam gasket
• EPDM or other gasket materials where applicable
• Gel seal configuration
• Knife-edge housing compatibility
• Flange frame
• Box frame
• Custom sealing surface
• Airflow direction and installation orientation

Buyers should provide housing drawings or photos whenever sealing requirements are important.

OEM Equipment Integration

OEM equipment may require a HEPA filter that fits a specific cabinet, air handling unit, clean air module, duct module, process system, or machine enclosure.

Clean-Link can support OEM HEPA filter projects involving:

• Custom HEPA filter dimensions
• Repeat-order specification control
• Private-label packaging
• Equipment-specific frame design
• Custom airflow and resistance requirements
• Gasket or gel seal matching
• Export packaging
• Drawings and documentation support where applicable

Related page: OEM Air Filter Manufacturing

 

Custom HEPA Filter Dimensions

HEPA filter dimensions must be confirmed carefully because nominal size and actual size may not be the same.

For custom HEPA filters, buyers should provide:

Dimension Detail	What to Confirm
Length	Actual outside frame length
Width	Actual outside frame width
Depth	Total filter depth
Frame thickness	Important for housing fit
Flange size	Required for flange-type HEPA filters
Gasket location	Upstream, downstream, full-face or custom position
Gel seal position	Required for gel seal HEPA filter projects
Installation clearance	Space available for installation and replacement
Airflow direction	Helps confirm installation orientation
Housing opening	Important for replacement and retrofit projects

 

For replacement projects, Clean-Link recommends sending a photo of the existing filter, measured dimensions and application details.

Custom Length, Width and Depth Options

Clean-Link can manufacture custom HEPA filter sizes according to confirmed drawings, samples or specifications.

Custom dimensions may be required for:

• Cleanroom ceiling modules
• Terminal HEPA filter housings
• Industrial HEPA filter banks
• Air handling units
• Laboratory HVAC systems
• Pharmaceutical production areas
• Electronics manufacturing environments
• OEM equipment
• Replacement filter projects
• Retrofit ventilation systems

Custom HEPA filter size should always be reviewed together with airflow, pressure drop, frame design and sealing method.

A filter that fits physically may still be unsuitable if the media area, resistance or sealing structure does not match the system.

Efficiency Options: H13, H14 and Project-Specified Requirements

Custom HEPA filters are often specified by efficiency class.

Clean-Link can support H13 and H14 project requirements depending on filter type, application and confirmed specification.

Efficiency selection should consider:

• Required cleanliness level
• Application environment
• Airflow requirement
• Pressure drop target
• Prefiltration stage
• Testing expectation
• Installation and sealing method
• Replacement plan

Higher efficiency is not automatically better for every system. The filter must be suitable for the equipment and operating conditions.

Related articles: Understanding HEPA Filter Efficiency

H10, H11, H12, H13 HEPA Filters Explained

Mini-Pleat, Deep-Pleat and Separator HEPA Options

Clean-Link can support different custom HEPA filter constructions based on airflow, pressure drop, filter depth, installation space and application requirements.

Custom Mini-Pleat HEPA Filters

Mini-pleat HEPA filters use closely spaced pleated media to provide large media area in a compact structure.

They are commonly used for:

• Cleanroom ceiling systems
• Terminal HEPA filter modules
• Compact HVAC final filtration
• Laboratory ventilation systems
• Pharmaceutical facilities
• Electronics manufacturing
• OEM clean air equipment

Custom mini-pleat HEPA filters may be selected when limited installation depth, compact structure and stable airflow are important.

Custom Deep-Pleat HEPA Filters

Deep-pleat HEPA filters are used where a deeper filter structure is suitable.

They may be applied in:

• Industrial air handling systems
• High-airflow HEPA filter banks
• Replacement HEPA filter housings
• Equipment filtration
• Process ventilation systems
• Certain cleanroom or technical applications

Deep-pleat design should be reviewed according to airflow, pressure drop, frame strength, filter depth and installation requirements.

Separator HEPA Filters

Separator HEPA filters use separators between pleated media layers to maintain air channels.

They may be used in applications requiring a stronger or deeper HEPA filter structure, depending on airflow, operating environment, temperature conditions and project specification.

Separator material, frame construction, temperature requirement and sealing design should be confirmed before production.

Frame Options for Custom HEPA Filters

HEPA filter frame material affects durability, weight, sealing, corrosion resistance, handling and application suitability.

Clean-Link can support different frame options depending on project requirements.

Frame Option	Typical Consideration
Aluminum frame	Lightweight and widely used in many cleanroom and HVAC HEPA applications
Galvanized steel frame	Suitable where stronger frame structure or industrial housing compatibility is required
Stainless steel frame	Considered for applications requiring higher corrosion resistance or specific cleaning conditions
MDF or wood frame where applicable	Used in certain traditional or replacement HEPA filter formats
Custom frame design	Based on equipment housing, flange, gasket, gel seal or replacement sample

 

Frame material should be reviewed together with filter weight, handling method, gasket compression, housing condition and operating environment.

Media, Separator and Construction Requirements

Custom HEPA filter performance depends on more than the outside frame size.

Important construction details may include:

• HEPA media type
• Pleat height
• Pleat spacing
• Media pack depth
• Media area
• Separator material
• Hot melt or spacer structure
• Sealant
• Frame-to-media bonding
• Gasket material
• Gel seal material where applicable
• Protective mesh or grille where required
• Airflow direction
• Faceguard or screen requirements

For custom or replacement projects, Clean-Link can review the existing filter sample or drawing to help confirm the construction requirements.

Gasket and Gel Seal Options

Custom HEPA filters often require specific sealing structures.

Clean-Link can support gasket and gel seal discussions based on housing requirements.

Gasket HEPA Filters

Gasketed HEPA filters may include:

• Upstream gasket
• Downstream gasket
• Double gasket
• Full-face gasket
• Foam gasket
• EPDM gasket where applicable
• Custom gasket width or position

Gasket design should be matched with the housing compression surface.

Gel Seal HEPA Filters

Gel seal HEPA filters are used in suitable cleanroom or controlled environment systems where the housing uses a compatible knife-edge sealing design.

For gel seal projects, buyers should provide:

• Housing drawing
• Knife-edge dimension
• Gel channel location
• Filter orientation
• Airflow direction
• Existing filter photo
• Installation method

The sealing structure should be confirmed before production to reduce installation mismatch.

Flange, Box Type and Terminal HEPA Configurations

Custom HEPA filters may be manufactured in different external configurations.

Common options include:

• Box type HEPA filters
• Single flange HEPA filters
• Double flange HEPA filters
• Header frame HEPA filters
• Terminal HEPA filters
• Gel seal terminal filters
• Duct-mounted HEPA filters
• Equipment-mounted HEPA filters
• Custom housing-matched HEPA filters

The correct structure depends on the installation location, airflow direction, housing design, sealing method and maintenance access.

Temperature and Operating Environment

Some custom HEPA filter projects require review of temperature, humidity or operating conditions.

Buyers should confirm:

• Operating temperature
• Peak temperature
• Humidity level
• Cleaning or washdown exposure
• Chemical exposure
• Oil mist or process particles
• Dust concentration
• Intermittent or continuous operation
• Indoor or outdoor equipment location
• Paint booth or oven-related conditions where applicable

For higher temperature applications, filter media, separator, frame, sealant, gasket and handling requirements should be reviewed carefully.

Related page: High Temperature HEPA Filters

Airflow and Pressure Drop Review

A custom HEPA filter should be designed around the system’s airflow requirement.

Important data includes:

Factor	Why It Matters
Rated airflow	Confirms required air volume per filter
Face velocity	Affects resistance, loading and filter behavior
Initial pressure drop	Helps evaluate system resistance when the filter is new
Final pressure drop	Supports replacement planning
Filter media area	Affects pressure drop and dust loading behavior
Filter depth	Affects available media area and installation compatibility
Prefiltration	Helps reduce upstream dust load before the HEPA filter
Fan capability	Determines whether the system can handle filter resistance
Operating hours	Affects loading rate and service planning

 

If airflow information is not available, buyers can provide equipment model, filter quantity, housing size, current filter label or system photos for review.

Related article: Air Filter Pressure Drop: How to Balance Efficiency, Airflow, and Energy Use

HEPA Testing and Leakage Testing Requirements

Custom HEPA filter projects may require testing or documentation depending on application and buyer specification.

Clean-Link can support discussion of:

• Dimension inspection
• Visual inspection
• Frame and gasket inspection
• Airflow resistance data where applicable
• Efficiency-related data where applicable
• Leakage testing support where applicable
• Scan test discussion where applicable
• Individual test report requirements where applicable
• Datasheets and drawings
• Packaging inspection
• Documentation for OEM or replacement projects

Testing method, report format, acceptance criteria and documentation scope should be confirmed before production.

For technical context, buyers may refer to EN 1822 and ISO 29463 for high-efficiency filter classification and testing. Final project requirements should be specified by the buyer or project standard.

Related article: Air Filter Test Data: What B2B Buyers Should Check

Custom HEPA Filters by Application

Clean-Link supplies custom HEPA filters for different B2B applications.

Application	Common Custom Requirement
Cleanrooms	H13/H14 filters, custom size, gasket or gel seal, ceiling module fit
Pharmaceutical facilities	Documentation, sealing, airflow and pressure drop review
Biotechnology facilities	Controlled HVAC filtration and replacement filter matching
Laboratories	Custom HEPA filters for supply or exhaust systems
Electronics manufacturing	Fine particle control and clean HVAC final filtration
Semiconductor-related environments	High-efficiency filter matching for controlled production areas
Industrial ventilation	Custom frame, deeper construction, airflow and pressure drop review
Commercial HVAC systems	Replacement HEPA filters and final-stage filtration
OEM equipment	Equipment-specific HEPA filter design and repeat supply
Retrofit projects	Sample matching, non-standard dimensions and housing compatibility

 

Related page: Cleanroom Air Filtration

Drawing and Sample Matching Support

For many replacement projects, the easiest starting point is an existing filter sample.

Clean-Link can review custom HEPA filter projects based on:

• Existing HEPA filter photos
• Filter label photos
• Old datasheet
• Product drawing
• Housing drawing
• Physical sample
• Measured dimensions
• Gasket or gel seal details
• Airflow direction
• Application environment
• Quantity and replacement schedule

If buyers do not have a complete specification, they can start with:

photo + dimensions + application

Clean-Link can help identify which details should be confirmed before quotation or production.

What Information Should You Send for a Custom HEPA Filter Quote?

To request a custom HEPA filter quotation, provide as much of the following information as possible.

Information Needed	Why It Matters
Application	Cleanroom, HVAC, industrial, lab, pharma, electronics, OEM or replacement project
HEPA filter dimensions	Confirms length, width, depth and physical fit
Efficiency requirement	H13, H14 or project-specified requirement
Rated airflow	Helps evaluate filter sizing and pressure drop
Pressure drop target	Helps match fan capability and system resistance
Filter construction	Mini-pleat, deep-pleat, separator, box type, flange type
Frame material	Aluminum, galvanized steel, stainless steel or other frame
Media requirement	Confirms HEPA media and construction expectations
Separator requirement	Important for deep-pleat or separator HEPA filters
Gasket requirement	Upstream, downstream, full-face or custom gasket
Gel seal requirement	Needed for compatible cleanroom housing systems
Flange requirement	Confirms frame structure and housing fit
Temperature requirement	Important for high-temperature or process applications
Existing filter photo	Useful for replacement and sample matching
Drawing or sample	Helps confirm non-standard or OEM specifications
Testing requirement	Leakage test, scan test, report format or project documentation
Quantity	Supports quotation and production planning
Packaging need	Export packing, clean packaging, OEM label or bulk packaging

Minimum Information to Start

• HEPA filter dimensions
• Efficiency requirement
• Application
• Quantity
• Current filter photo or drawing

Better Information for Accurate Quotation

• Rated airflow
• Pressure drop target
• Frame material
• Gasket or gel seal requirement
• Filter construction
• Temperature requirement
• Testing and documentation needs
• Packaging requirement
• Existing sample

Why Choose Clean-Link for Custom HEPA Filters?

Clean-Link supports custom HEPA filter projects for cleanroom, HVAC, industrial ventilation, laboratory, pharmaceutical, biotechnology, electronics, OEM and replacement applications.

B2B buyers choose Clean-Link for:

• Custom length, width and depth support
• H13 and H14 project capability
• Mini-pleat and deep-pleat HEPA filter options
• Separator HEPA filter support
• Aluminum, galvanized steel and stainless steel frame options
• Gasket and gel seal configuration support
• Flange and box-type HEPA filter options
• Airflow and pressure drop review
• Sample matching and drawing-based quotation
• Testing and documentation discussion where applicable
• OEM and repeat supply support
• Project-based quotation

Clean-Link helps buyers move from an incomplete inquiry to a more accurate custom HEPA filter specification based on dimensions, airflow, efficiency, frame, media, seal type, operating condition and application requirements.

Related page: Air Filter Manufacturing Capabilities

Request Custom HEPA Filter Support

Need a custom HEPA filter that matches your housing, equipment, airflow requirement or replacement sample?

Send Clean-Link your HEPA filter dimensions, efficiency requirement, application, rated airflow, pressure drop target, frame material, gasket or gel seal requirement, drawing, sample photo, testing requirement and quantity.

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

photo + dimensions + application

Our team can review the available information and help confirm what should be checked next.

Request a Custom HEPA Filter Quote →

FAQ

What is a custom HEPA filter?

A custom HEPA filter is manufactured according to project-specific requirements such as non-standard size, airflow, efficiency class, pressure drop target, frame material, gasket, gel seal, flange, temperature condition or existing sample.

Can Clean-Link make custom size HEPA filters?

Yes. Clean-Link can manufacture custom size HEPA filters based on confirmed length, width, depth, frame design, gasket or gel seal requirement, airflow and application conditions.

What HEPA filter dimensions should I provide?

Provide the actual outside length, width and depth. For replacement projects, also confirm frame thickness, flange dimension, gasket position, gel seal position, airflow direction and housing opening if available.

Can Clean-Link match an existing HEPA filter sample?

Clean-Link can review an existing HEPA filter photo, label, drawing or physical sample to discuss replacement or custom manufacturing options. Final specifications should be confirmed before production.

Can I request a custom H13 or H14 HEPA filter?

Yes. Clean-Link can support custom H13 and H14 HEPA filter projects based on application, dimensions, airflow, pressure drop, frame, seal type, testing requirements and documentation needs.

Can Clean-Link make gel seal HEPA filters?

Clean-Link can support gel seal HEPA filter projects for suitable cleanroom or controlled environment systems. Buyers should provide housing drawings, knife-edge details, airflow direction and existing filter information where available.

What is the difference between mini-pleat and deep-pleat HEPA filters?

Mini-pleat HEPA filters provide large media area in a compact structure and are often used where installation depth is limited. Deep-pleat HEPA filters use a deeper construction and may be selected for certain industrial, replacement or high-airflow applications.

Does Clean-Link support HEPA leakage testing?

Clean-Link can support leakage testing or scan test discussion where applicable, depending on product type, project requirement, testing method and documentation needs. Testing scope should be confirmed before production.

What information is needed for a custom HEPA filter quote?

Useful information includes dimensions, efficiency class, rated airflow, pressure drop target, frame material, gasket or gel seal requirement, filter construction, application, temperature condition, testing requirement, quantity, drawing or sample photo.

Can Clean-Link support OEM custom HEPA filters?

Yes. Clean-Link supports OEM custom HEPA filter projects for equipment manufacturers, cleanroom contractors, filtration distributors, HVAC suppliers and industrial project buyers.