G4 Pre Filter Manufacturer
Factory-direct G4 Pre Filters for HVAC systems, air handling units, industrial ventilation, cleanroom pre-filtration, commercial buildings, and equipment protection applications.
- G4 coarse filtration for HVAC and AHU pre-filter stages
- Polyester synthetic media with low pressure drop and stable airflow
- Standard and custom sizes for replacement, OEM, and project orders
- Aluminum, galvanized, cardboard, or customized frame options
- Wholesale supply, private label, and export packaging available
Custom G4 pre filter solutions for HVAC contractors, AHU manufacturers, facility maintenance teams, distributors, and industrial ventilation projects.
G4 Pre Filter Specifications
Our G4 Pre Filters can be customized according to filter size, media thickness, frame material, airflow, pressure drop requirement, installation method, and order type. Send us your filter size, frame type, thickness, and quantity for a suitable quotation.
ClearFilter Advantage
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Factory Direct Source-level manufacturing eliminates middleman markups.
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Agile OEM/ODM Zero MOQ flexibility for custom dimensions and structures.
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Strict Compliance Tested to align with ISO 16890 and international standards.
Need Custom Specifications?
Contact our engineering team for rapid prototyping and factory-direct quotation.
| Product Name | G4 Pre Filter |
|---|---|
| Product Type | G4 air pre filter / G4 panel pre filter / G4 polyester pre filter / HVAC pre filter |
| Filter Class | G4 according to legacy EN 779 classification; ISO 16890 coarse classification can be discussed |
| Filter Media | Polyester synthetic fiber media, non-woven synthetic media, washable media, or customized |
| Media Structure | Progressive-density media, flat media, pleated media, pad media, or customized structure |
| Frame Material | Aluminum frame, galvanized steel frame, cardboard frame, plastic frame, or customized |
| Support Structure | Wire mesh, expanded metal mesh, internal support, pleated support, or customized reinforcement |
| Filter Thickness | 10 mm, 15 mm, 20 mm, 25 mm, 46 mm, 50 mm, or customized thickness |
| Size | Standard HVAC sizes and custom sizes available |
| Airflow & Pressure Drop | Depending on filter size, media thickness, airflow, and project requirements. |
| Washable Option | Available depending on media structure and frame design |
| Application | HVAC systems, AHUs, FCUs, industrial ventilation, cleanroom pre-filtration, spray booth intake |
| OEM / ODM | Supported for distributors, HVAC contractors, AHU manufacturers, and project buyers |
G4 Pre Filter Products We Supply
As a G4 Pre Filter supplier and factory, we support different pre filter G4 solutions for HVAC systems, AHUs, industrial ventilation, distributor stock, OEM projects, and wholesale orders.
Pre Filter G4
Used as a primary air filtration stage to capture coarse dust and larger particles before the air reaches medium-efficiency or high-efficiency filters. Helps protect downstream filters.
China Pre Filter G4
Suitable for buyers who need factory-direct pricing, custom sizes, export packaging, and repeatable specifications for HVAC filtration projects.
Pre Filter G4 Factory
We support media selection, frame assembly, custom dimensions, private label, carton packaging, and bulk production for different HVAC and ventilation projects.
Pre Filter G4 Supplier
A reliable supplier supporting standard sizes, custom sizes, different frame materials, stable batch production, and export packaging.
G4 Polyester Pre Filter
Uses synthetic polyester media for coarse dust filtration. Commonly selected for low pressure drop, stable airflow, and cost-effective maintenance.
Pre Filter G4 Wholesale
Wholesale supply available for buyers who need repeat orders, stable specifications, and customized packaging strategies.
Need G4 Pre Filters for HVAC or industrial ventilation projects? Send us your filter size, thickness, frame material, quantity, and packaging requirement for a custom quotation.
Common Sourcing Problems for G4 Pre Filters
The wrong G4 pre filter can clog too quickly, increase pressure drop, reduce airflow, fail to fit the HVAC unit, or fail to protect downstream filters. Our solutions help buyers match specifications with real HVAC operating conditions.
| Pain Point | Business Impact | Our Solution |
|---|---|---|
| Downstream bag filters or HEPA filters clog too quickly | Frequent replacement increases maintenance cost and shortens the service life of more expensive filters. | G4 pre filters capture coarse dust before downstream filters, helping protect medium-efficiency and high-efficiency stages. |
| The pre filter creates too much airflow resistance | Excessive pressure drop may reduce HVAC airflow, increase fan load, or affect ventilation performance. | Polyester media, suitable thickness, and frame design can be selected to help balance coarse filtration and airflow. |
| Filter size does not match the HVAC unit or AHU | Incorrect dimensions may cause bypass air, poor sealing, installation difficulty, or urgent replacement orders. | Standard and custom sizes can be produced according to filter rack dimensions, drawings, or existing samples. |
| Low-cost filters deform during operation | Weak frames or unsupported media may collapse, move, or fail under airflow. | Aluminum, galvanized, cardboard, plastic, and reinforced frame options are available depending on system conditions. |
| Bulk orders have inconsistent dimensions or packaging | Inconsistent batches may cause installation complaints, inventory confusion, and customer returns. | We support model list management, repeat production, private label packaging, and wholesale supply for distributors. |
Why Choose Our G4 Pre Filters
Our G4 Pre Filters are designed around coarse dust filtration, low pressure drop, HVAC compatibility, flexible customization, batch consistency, and factory-direct wholesale supply.
G4 Coarse Filtration for HVAC Protection
Designed for primary filtration stages to capture coarse dust and larger particles before reaching downstream bag filters, compact filters, or HEPA filters.
Benefit: Protect expensive downstream filters and reduce replacement frequency.
Low Pressure Drop Polyester Media
Synthetic polyester media can be selected to support coarse dust capture while helping maintain airflow in HVAC and AHU systems.
Benefit: Reduce airflow restriction and support stable ventilation performance.
Custom Size and Frame Options
Filter length, width, thickness, frame material, support mesh, gasket, label, and packaging can be customized according to AHU size or filter rack.
Benefit: Source filters that fit perfectly, reducing installation problems.
Washable or Disposable Options
Depending on media structure and frame design, G4 pre filters can be supplied as washable, reusable, or disposable options.
Benefit: Choose the right balance between upfront cost and cleaning labor.
Stable Batch Production for Wholesale
We support confirmed size lists, repeat production, private label packaging, carton design, barcode labels, and bulk packaging.
Benefit: Maintain stable inventory, consistent packaging, and repeatable specs.
Commercial & Industrial Ventilation
Suitable for HVAC systems, AHUs, FCUs, fresh air intake, return air filtration, industrial ventilation, spray booth intake, and factories.
Benefit: Use one filter series across multiple ventilation projects easily.
Factory-Direct G4 Pre Filter Supply
Work directly with a G4 pre filter factory for custom size production, polyester media selection, private label packaging, wholesale pricing, and bulk supply.
Custom Size and Media Support
Send your filter size, thickness, media type, frame material, airflow requirement, or existing filter photo. Our team can help review the specification before quotation.
Manufacturing and Assembly Capability
We support media cutting, frame assembly, support mesh installation, bonding, labeling, packaging, and bulk shipment for HVAC pre-filter projects.
Wholesale and Distributor Support
Private label, neutral packaging, carton design, barcode, pallet packaging, size list management, and repeated production can be discussed for wholesalers and distributors.
Project and Replacement Supply
For HVAC maintenance programs, AHU manufacturers, and facility management projects, we can support repeat order production and stable batch specifications.
What Is a G4 Pre Filter?
A G4 Pre Filter is a coarse air filter used as the first filtration stage in HVAC systems, air handling units, industrial ventilation systems, and cleanroom pre-filtration systems.
Core Function
Its main function is to capture larger dust particles before the air reaches medium-efficiency filters, bag filters, compact filters, or HEPA filters.
Standards & Materials
G4 is a legacy EN 779 filter class commonly associated with coarse pre-filtration. In modern projects, buyers may also refer to ISO 16890 coarse filter classifications depending on local standards and project specifications. G4 pre filters are often made with polyester synthetic media and can be supplied as panel filters, media pads, washable filters, or disposable filters.
Selection Guide
For B2B buyers, choosing a G4 pre filter is not only about filter grade. The filter should match the size, media thickness, frame material, airflow, pressure drop limit, dust-loading condition, installation method, replacement interval, and order type.
How to Choose the Right G4 Pre Filter
Before placing an order, confirm the filter size, media type, thickness, frame material, airflow, pressure drop limit, installation position, dust-loading condition, replacement strategy, and order type.
| Selection Factor | What Buyers Need to Check | Recommended Choice / What We Support |
|---|---|---|
| Filter Grade | Confirm whether the project requires G4 pre filtration or an ISO 16890 coarse filter reference. | G4 pre filter options and project-based coarse filtration solutions can be discussed. |
| Filter Size | Check length, width, thickness, and whether the filter must fit an existing AHU, HVAC unit, or filter rack. | Standard sizes and custom sizes are available for replacement, OEM, and project orders. |
| Media Type | Identify whether the project needs polyester media, washable media, disposable media, or reinforced media. | G4 polyester pre filter media and customized media structures can be supplied. |
| Media Thickness | Confirm whether the system uses 10 mm, 15 mm, 20 mm, 25 mm, 46 mm, 50 mm, or other thickness. | Media thickness can be selected according to dust loading, airflow, and installation space. |
| Frame Material | Choose frame material based on budget, humidity, strength, replacement frequency, and installation method. | Aluminum, galvanized steel, cardboard, plastic, or customized frames are available. |
| Airflow & Pressure Drop | Confirm system airflow and whether the HVAC system can handle the filter resistance. | Low-resistance polyester media and suitable thickness can be selected to help control pressure drop. |
| Order Type | Clarify whether the order is for replacement, OEM supply, distributor stock, wholesale, or project bulk purchasing. | Send size list, frame material, thickness, quantity, and packaging requirement for a suitable quotation. |
If you are not sure which size, frame, or media thickness to choose, send us your HVAC system information, filter size, airflow requirement, and quantity. Our team can help recommend a suitable G4 Pre Filter option.
G4 Pre Filter vs. M5 Medium Filter
G4 pre filters and M5 medium filters are both used in HVAC air filtration systems, but they are selected for different filtration stages, particle sizes, pressure drop requirements, and maintenance goals.
| Comparison Factor | G4 Pre Filter | M5 Medium Filter |
|---|---|---|
| Filtration Stage | Primary pre-filter stage | Secondary or medium-efficiency filtration stage |
| Main Purpose | Captures coarse dust and protects downstream filters | Captures finer particles after pre-filtration |
| Typical Position | Fresh air intake, return air, AHU pre-filter section | After G4 pre-filter, before final filters |
| Pressure Drop | Usually selected for low resistance and high airflow pre-filtration | Usually higher resistance than coarse pre-filters depending on media and design |
| Downstream Protection | Helps extend the life of M5, F7, compact, bag, or HEPA filters | Provides improved air cleanliness before final filtration |
| Recommended Use | Choose G4 when the main goal is coarse dust capture and downstream filter protection | Choose M5 when finer filtration is required after the pre-filter stage |
Not sure whether you need G4, M5, or a multi-stage filtration setup? Send us your application, airflow, filter size, and downstream filter type. We can help compare suitable options.
G4 Pre Filter FAQ
Common questions from B2B buyers about specifications, customization, and wholesale supply.
What information should I provide for a G4 Pre Filter quotation?
What is a G4 Pre Filter used for?
Is G4 still used under ISO 16890?
What media is used for G4 Pre Filters?
Can you customize the size and frame material?
Are G4 Pre Filters washable?
Do you support wholesale and OEM orders?
Request a G4 Pre Filter Quote
Send your filter size, thickness, frame material, media type, application, and quantity. Our team will help recommend a suitable G4 Pre Filter solution for your HVAC, AHU, or industrial ventilation project.
Need a pre filter G4 factory or wholesale supplier?
Send us your size list, quantity, frame material, and packaging requirement. Our team can help recommend a G4 Pre Filter solution for replacement, OEM, distributor stock, or project bulk purchasing.
- G4 pre filter and polyester media options
- Standard and custom sizes available
- Aluminum, galvanized, cardboard, or custom frames
- Washable or disposable options depending on structure
- Wholesale and OEM packaging supported
Email: Annie.chen@clearfilterpro.com
Phone: +86 13538992575