Panel filters
Metal cased pleated panel filters
A synthetic pleat pack in a galvanised steel frame for extra strength in damp conditions or high airflow, with graduated-density media for even dirt loading.
- G4
- ISO Coarse 80%
- 20mm – 100mm
Filter grade
G4 / ISO Coarse 80%
| EN 779 class | G4 |
|---|---|
| ISO 16890 class | ISO Coarse 80% |
| Filter role | High-capacity pre-filter, damp or high-airflow duty |
| Media | Synthetic pleat pack, graduated density |
| Frame | Galvanised steel, wire rod W clips each face |
| Frame depths | 20mm – 100mm |
| Max operating temperature | Up to 80°C |
| Options | Face mesh grille |
| Sizes | Stocked sizes next-day, non-standard made to order |
| Testing | Media tested to ISO 16890 and EN 779:2012 |
Standard sizes
Common face sizes
Nominal imperial sizes with their actual metric face dimensions. Other sizes are available to order.
| Nominal (inches) | Actual (mm) |
|---|---|
| 24 × 24 | 596 × 596 |
| 24 × 12 | 596 × 287 |
| 25 × 16 | 625 × 395 |
| 20 × 16 | 496 × 395 |
| 24 × 20 | 596 × 496 |
| 25 × 20 | 625 × 496 |
| 20 × 20 | 496 × 496 |
| 12 × 12 | 287 × 287 |
Product features
Construction and performance
- High-capacity (G4, ISO Coarse 80%) filtration for air handling systems in offices, retail, hospitals, food environments and schools.
- A synthetic media pleat pack fixed into a galvanised steel frame, with a wire rod W clip on each face for strength.
- Graduated-density media for even dirt loading and greater dust holding capacity.
- Operating temperature up to 80°C.
- Frame depths from 20mm to 100mm.
- Non-standard sizes manufactured to order.
- Media tested to ISO 16890 and EN 779:2012.
Key benefits
- A metal frame instead of card gives an extra level of strength in very damp conditions or high airflow applications.
- Large dust holding capacity increases efficiency, reducing energy consumption, running costs and CO2 emissions.
Typical applications
- Offices
- Retail
- Hospitals
- Food environments
- Schools
Talk to the Maxi team
Interested in metal cased pleated panel filters?
Compare the range
How metal cased pleated compares with other panel filters
| Specification | Synthetic | Glass | Pleated | Metal cased pleated | High capacity pleated |
|---|---|---|---|---|---|
| EN 779 class | G3 – G4 | G3 | G4 – M5 | G4 | G4 |
| ISO 16890 class | ISO Coarse 50% – 60% | ISO Coarse | ISO Coarse 60% – 95% | ISO Coarse 80% | ISO Coarse 60% |
| Media | Polyester fibre pad | Spun glass fibre | Cotton / polyester blend, pleated and bonded to metal mesh | Synthetic pleat pack, graduated density | Cotton / polyester blend, 50% more pleats |
| Frame | Card, metal frame option | Card, metal frame option | Moisture-resistant card | Galvanised steel, wire rod W clips each face | Moisture-resistant card, expanded steel support grid |
| Frame depths | 15mm, 22mm, 47mm | 15mm, 22mm, 47mm, 98mm | 22mm, 47mm, 97mm | 20mm – 100mm | 22mm, 47mm, 97mm |
| Max temperature | Standard HVAC | Up to 180°C | Standard HVAC | Up to 80°C | Standard HVAC |
| Availability | Standard and bespoke sizes | Standard and bespoke sizes | Stocked sizes next-day, non-standard made to order | Stocked sizes next-day, non-standard made to order | Non-standard sizes available to order |
G3 – G4Synthetic panel filters
Pre-filter or basic filtration
- ISO 16890
- ISO Coarse 50% – 60%
- Depths
- 15mm, 22mm, 47mm
G3Glass panel filters
Pre-filter, paint and dust arrestance
- ISO 16890
- ISO Coarse
- Depths
- 15mm, 22mm, 47mm, 98mm
G4 – M5Pleated panel filters
Pre-filter for air handling systems
- ISO 16890
- ISO Coarse 60% – 95%
- Depths
- 22mm, 47mm, 97mm
G4High capacity pleated panel filters
High-capacity pre-filter, higher air volumes
- ISO 16890
- ISO Coarse 60%
- Depths
- 22mm, 47mm, 97mm
FAQs
Metal cased pleated panel filters: frequently asked questions
Metal Cased Pleated Panel Filters are high-capacity pre-filters designed for use in air handling units (AHUs), HVAC systems, and ventilation systems across offices, retail environments, hospitals, food processing facilities, and schools. They help remove airborne dust and larger particles while protecting downstream filters.
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Make an enquiry about Metal Cased Pleated Panel Filters
Simply fill in the form below to make your enquiry and one of the Maxi team will get back to you as soon as possible.
Technical help without the hard sell
Need metal cased pleated panel filters?
Send the face size, depth, grade and quantity, or a photo of the existing label, and Maxi will confirm the right specification.