At a Glance
•Role: G3–G4 coarse pre-filter for AHUs, rooftop units and general ventilation
•Structure: Pleated synthetic media + metal support mesh in an aluminum (or metal) frame
•Main job: Take out coarse dust and fibres, protect coils and downstream F5–F9 / HEPA filters
•Best for: Systems that are a bit too harsh for simple cardboard pleats, but don't justify full metal
washable filters
The idea behind the Aluminum Frame Mesh Pleat Air Filter is straightforward: give you a pre-filter that is tougher than a standard paper-frame pleat, without forcing you into a washable all-metal design.
Technical Specifications
| Item | Data / Options |
|---|---|
| Filter Type | Aluminum frame mesh pleat air filter (G3–G4 primary efficiency pleated filter) |
| Filtration Efficiency | G3: 85% @ 5.0 μm; G4: 90% @ 5.0 μm (gravimetric method) |
| Typical Sizes | 595 × 595 × 45 mm; 595 × 595 × 95 mm; 290 × 595 × 95 mm; other sizes on request |
| Rated Airflow | 1,800 – 3,600 m³/h (depending on size and configuration) |
| Initial Resistance | 45 – 90 Pa |
| Final Resistance | 80 – 145 Pa |
| Frame Material | Paper frame, aluminium frame, galvanized iron frame, stainless steel frame |
| Filter Media | Non-woven fabric / polyester synthetic fibre with metal mesh support |
| Filter Structure | Pleated panel with metal mesh reinforcement |
| Application Class | Primary / coarse pre-filter for HVAC and industrial ventilation |
Why an Aluminum Frame Mesh Pleat Instead of a "Normal" Pleat?
From the projects we see,many buyers hesitate between these options: paper frame pleated filters, aluminum frame pleated filters, and all-metal washable filters. We generally categorize them as follows:
•Compared with a simple cardboard pleated filter
Aluminum (or other metal) frame stays rigid even with higher face velocity and repeated handling.
Mesh backing supports the pleats, so the media doesn't sag or deform easily.
Better suited for slightly humid or rooftop environments.
•Compared with a full metal washable filter
No need to organise washing and drying cycles.
Lower unit cost; change-out is just "remove and replace".
Still enough mechanical strength and stability for most commercial and light industrial AHUs.
If you are currently using paper frame pleated filters, and you frequently experience issues such as deformation, moisture damage, and breakage during replacement, then this type of aluminum frame mesh pleated air filter is usually our recommended upgrade.
Application Scenarios
The Aluminum Frame Mesh Pleat Air Filter is suitable for a wide range of industrial and commercial air systems where a G3–G4 primary filter is required:
1
In the return air ducts of offices, shopping malls, airports, and hospitals, these filters are used as the first stage of coarse pre-filtration to block insects, lint, and large dust particles, reducing the burden on bag and box filters.
2
When the unit may frequently open and close doors, or operate in outdoor or humid environments, and the paper filter frame is prone to moisture damage and deformation, using an Aluminum Frame Mesh Pleat Air Filter would be a more reliable option.
3
For example, in areas such as electronics, food processing, and painting, where high levels of cleanliness are required but a Class 10,000 cleanroom is not necessary, this product can be placed before the return air HEPA/F7-F9 filter to filter out larger circulating particles.
4
Large air compressors and equipment air intakes require a coarse, robust pre-filter – the kind that doesn't need washing and can be replaced directly. These types of products are quite suitable for this application.
Large air compressors and equipment air intakes require a coarse, robust pre-filter – the kind that doesn't need washing and can be replaced directly. These types of products are quite suitable for this application.
Installation & Replacement Guidelines
Install the filter with the airflow direction aligned to the arrow or marking on the frame (if provided).
Ensure the filter sits tightly in the frame or track to prevent bypass air.
Avoid pressing or deforming the pleats during installation.
Monitor pressure drop or follow a time-based replacement schedule depending on the system's operating conditions.
Replace the filter when it reaches the recommended final resistance or when visible dust accumulation indicates that the media is saturated.
For systems with high dust loads, more frequent inspections are recommended, especially during the initial period after commissioning or renovation.
Short FAQ
Can I drop this filter into the same tracks as my current cardboard pleats?
In most cases, yes. As long as the outer dimensions and thickness match, the aluminum frame mesh pleat design will slide into the same track or frame. We will match the dimensions you provide.
Is this filter washable?
It is designed and tested as a disposable pre-filter. Some customers at the site may simply blow off dust or perform light cleaning, but from the perspective of filtration performance and hygiene, we recommend replacing it directly based on pressure difference or a predetermined cycle, rather than repeatedly washing it for extended periods.
When would you recommend stainless steel frame instead of aluminum?
Generally, we only recommend stainless steel frames in situations where there are highly corrosive gases, extremely high humidity, or where the filter media may be subjected to frequent and rough handling. For typical commercial and industrial air conditioning systems, aluminum frames are sufficiently durable.
Can you mix these filters with other types in one shipment?
Yes. We frequently supply the same customer with Aluminum Frame Mesh Pleat Air Filters, bag filters, and HEPA box filters simultaneously, palletizing and packaging them according to project or unit for easy distribution at your site.
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