Industrial Pre-Filters for Cleanroom HVAC Systems
CleanroomLink supplies engineered pre-filtration solutions for overseas buyers, HVAC engineers, quality teams, and factory managers who need balanced particle capture, airflow, and operating cost.
Avoid energy waste
High initial resistance can force AHU fans to work harder and increase electricity costs.
Match the environment
Cardboard frames may be unsuitable for high-humidity food or pharmaceutical areas.
Size for airflow
Incorrect rated airflow can cause early clogging and production-disrupting maintenance.
Fast RFQ Guide
Have your dimensions and airflow data ready? Submit the application environment, target efficiency, frame material, quantity, and delivery requirement for a more accurate quotation.
Send requirementsTechnical specifications
Parameter table for pre-filter selection
The values below describe the industrial pre-filter range. Final performance depends on the selected media, dimensions, airflow, sealing arrangement, and application. Items marked for confirmation should be finalized during the RFQ stage.
| Parameter | Specification / RFQ status |
|---|---|
| Filtration class | G3–F9 under EN779 / MERV 5–16 under ASHRAE; exact class to be confirmed |
| Filtration efficiency | Depends on model, media, and test method; verify against application requirements |
| Rated airflow | Custom in m³/h or CFM; confirm AHU design airflow and face velocity |
| Initial resistance | 30–150 Pa, model dependent |
| Recommended final resistance | 250–450 Pa; confirm with system operating limits |
| Filter media | Synthetic, glass fiber, or cotton; select according to dust load and temperature |
| Frame material | Galvanized steel, aluminum, SS304, or cardboard; environment dependent |
| Dimensions | Custom L × W × D in mm or inches |
| Sealing | PU, EVA, or EPDM gasket; confirm housing interface |
| Temperature / humidity | Up to 80°C / 90% RH standard reference; confirm actual conditions |
| Dust holding capacity | To be confirmed by selected media and applicable ISO 16890 / ASHRAE 52.2 method |
| Leak testing | Available on request; test scope and documentation to be confirmed |
| Applicable system | HVAC and AHU pre-filtration, including cleanroom multi-stage systems |
Information we need
A useful RFQ starts with system data
A reliable pre-filters supplier or manufacturer needs more than a product name. These inputs allow the specification to be checked against the housing, fan duty, cleanliness target, and procurement volume.
Efficiency target
G4, M5, F7, MERV rating, or the required application and standard.
Physical fit
Length, width, depth, gasket position, access direction, and original part number if available.
Operating conditions
Airflow, temperature, humidity, dust type, cleanroom ISO class, and cleaning or replacement cycle.
Commercial scope
Expected quantity, wholesale schedule, destination, target delivery date, and documentation needs.
Selection logic
Typical configurations by filtration stage
Efficiency, resistance, and airflow must be evaluated together. A higher efficiency grade may improve particle capture but can also increase resistance. The correct configuration maintains the required airflow without overloading the AHU fan or shortening service life.
G3–G4
Captures larger dust particles and protects secondary filters in standard HVAC systems and outdoor-air intake applications.
M5–M6
Used in multi-stage systems to protect finer filtration layers in general manufacturing and assembly environments.
F7–F9
Provides a final pre-filtration barrier before HEPA or ULPA stages where cleanroom air quality requires additional protection.
Lead-time drivers
Plan production around the details that change delivery
- Standard or custom size: Standard dimensions typically ship within 5–7 business days; custom sizes require additional fabrication time.
- Frame material: SS304 usually requires longer preparation than galvanized steel or aluminum.
- Testing and reports: Third-party reports or on-site leak testing certifications add processing time and must be defined early.
Custom options
Configure the filter around the facility
Custom wholesale and OEM-style requirements can be reviewed during the technical quotation process.
Frame selection
Moisture-resistant frames for humid environments and SS304 for applications requiring corrosion resistance.
Media selection
Synthetic media for high dust loads or glass fiber media for higher-temperature applications.
Gasket configuration
PU, EVA, or EPDM options selected to support an airtight fit in the AHU housing.
Selection boundary
Pre-filters and HEPA filters serve different jobs
Pre-filters are selected for dust-holding capacity and lower resistance, helping protect downstream filtration. HEPA and ULPA filters target ultra-high efficiency and should not be exposed to heavy dust loads without suitable upstream protection.
Choose pre-filters for
- • Bulk contaminant capture
- • AHU and secondary-filter protection
- • Higher dust-holding capacity
Use HEPA / ULPA downstream for
- • Ultra-high efficiency filtration
- • Controlled cleanroom air quality
- • Final-stage particle control
FAQ
Questions procurement and engineering teams ask
How do I confirm the model if I do not have the original part number? +
Provide the frame dimensions, required efficiency class or application type, and AHU rated airflow. These details can be cross-referenced to suggest a compatible specification.
Which information has the greatest impact on price? +
The main cost factors are efficiency grade, frame material, dimensions, testing or documentation requirements, and order volume. SS304 is typically more expensive than galvanized steel.
Do you support custom sizes and configurations? +
Yes. Custom dimensions, frame materials, media, and gasket arrangements can be reviewed against the AHU housing and operating environment.
What if the required test data or standard is not yet confirmed? +
Submit the application, system data, and target market requirements. Efficiency, resistance, leak testing, and documentation can then be confirmed during the RFQ stage.
Send RFQ
Request a specification-matched pre-filter quote
For an accurate and cost-effective quotation, submit your application environment, target standard, filter specifications or AHU data, expected quantity, and required delivery schedule.
Email:
Office:
Information to include in your inquiry
- Application environment and ISO class
- Target standards: EN, ISO, or ASHRAE
- Dimensions, airflow, and efficiency
- Frame, media, and gasket requirements
- Expected quantity and wholesale schedule
- Required delivery date and documentation
Submit your complete requirements below to receive a pre-filter recommendation and quotation path from CleanroomLink.