Panel filters
Pleated panel filters
Standard-capacity G4 – M5 pre-filters for air handling systems, with a frame design that uses 98% of the filter face. Standard sizes held in stock for next-day delivery.
- G4 – M5
- ISO Coarse 60% – 95%
- 22mm, 47mm, 97mm

Filter grade
G4 – M5 / ISO Coarse 60% – 95%
| EN 779 class | G4 – M5 |
|---|---|
| ISO 16890 class | ISO Coarse 60% – 95% |
| Filter role | Pre-filter for air handling systems |
| Media | Cotton / polyester blend, pleated and bonded to metal mesh |
| Frame | Moisture-resistant card |
| Frame depths | 22mm, 47mm, 97mm |
| 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
- Standard-capacity pre-filter (G4 – M5, ISO Coarse 60% – 95%) for air handling systems in offices, retail, hospitals, food environments and schools.
- Industry-standard cotton and polyester mixed fibre, pleated then bonded to a metal mesh and housed in a moisture-resistant card frame.
- 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.
- Standard sizes held in stock and available for next-day delivery. Non-standard sizes manufactured to order.
- Media tested to ISO 16890 and EN 779:2012.
Key benefits
- The frame design allows 98% of the filter face to be used, optimising filter area, dust holding capacity and service life.
- 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 pleated panel filters?
Compare the range
How 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
G4Metal cased pleated panel filters
High-capacity pre-filter, damp or high-airflow duty
- ISO 16890
- ISO Coarse 80%
- Depths
- 20mm – 100mm
G4High capacity pleated panel filters
High-capacity pre-filter, higher air volumes
- ISO 16890
- ISO Coarse 60%
- Depths
- 22mm, 47mm, 97mm
FAQs
Pleated panel filters: frequently asked questions
A pleated panel filter is a disposable air filter designed to remove larger airborne particles such as dust, lint and debris from ventilation and air handling systems. The pleated design increases the filter surface area, improving dust-holding capacity and service life.
Make an enquiry
Make an enquiry about 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 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.
