Panel filters
High capacity pleated panel filters
Fifty per cent more pleats than a standard panel for greater dust holding capacity, longer service life and fewer filter changes, with lower initial pressure loss.
- G4
- ISO Coarse 60%
- 22mm, 47mm, 97mm

Filter grade
G4 / ISO Coarse 60%
| EN 779 class | G4 |
|---|---|
| ISO 16890 class | ISO Coarse 60% |
| Filter role | High-capacity pre-filter, higher air volumes |
| Media | Cotton / polyester blend, 50% more pleats |
| Frame | Moisture-resistant card, expanded steel support grid |
| Frame depths | 22mm, 47mm, 97mm |
| Sizes | Non-standard sizes available 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 pre-filter (G4, ISO Coarse 60%) for air handling systems in offices, hotels, schools, hospitals and food environments.
- Blended cotton and polyester media with 50% more pleats, bonded into a moisture-resistant card frame and backed with an expanded steel support grid.
- Extends the life span of the more effective secondary filter.
- High indoor air quality and longer service life.
- Disposable and environmentally friendly.
- Frame depths of 22mm, 47mm and 97mm.
- Non-standard sizes available to order.
- Media tested to ISO 16890 and EN 779:2012.
Key benefits
- 50% more pleats than standard panels. The larger surface area gives greater dust holding capacity, extended service life and fewer filter changes.
- More rigid and robust, so they operate at far higher air volumes without collapsing while reducing initial pressure loss.
Typical applications
- Offices
- Hotels
- Schools
- Hospitals
- Food environments
Talk to the Maxi team
Interested in high capacity pleated panel filters?
Compare the range
How high capacity 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
G4Metal cased pleated panel filters
High-capacity pre-filter, damp or high-airflow duty
- ISO 16890
- ISO Coarse 80%
- Depths
- 20mm – 100mm
FAQs
High capacity pleated panel filters: frequently asked questions
High Capacity Pleated Panel Filters are designed as pre-filters for air handling units (AHUs) and HVAC systems in offices, hotels, schools, hospitals, and food processing environments. They help remove larger airborne particles and protect higher-efficiency secondary filters.
Make an enquiry
Make an enquiry about High Capacity 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 high capacity 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.
