Bag filters
G3 – G4 bag filters
Coarse bag filters used stand-alone or as pre-filtration for higher grade filters in general ventilation systems, with a high dust holding capacity for large particles.
- G3 – G4
- ISO Coarse 50% – 60%
- 300mm – 625mm pockets
Filter grade
G3 – G4 / ISO Coarse 50% – 60%
| EN 779 | G3 – G4 |
|---|---|
| ISO 16890 | ISO Coarse 50% – 60% |
| Filter role | Stand-alone or pre-filter |
| Media | 100% polypropylene pockets |
| Header frame | Galvanised steel |
| Header depths | 20mm, 25mm |
| Pocket lengths | 300mm – 625mm |
| Sizes | Non-standard sizes 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 manufactured to order.
| Nominal (inches) | Actual (mm) |
|---|---|
| 24 × 24 | 592 × 592 |
| 24 × 20 | 592 × 492 |
| 24 × 12 | 592 × 287 |
Product features
Construction and performance
- Generally used as stand-alone filters or pre-filtration for higher grade filters (G3 – G4, ISO Coarse 50% – 60%) in general ventilation systems.
- Constructed by mounting 100% polypropylene filter media pockets into a galvanised steel header frame.
- High dust holding capacity, effective at removing large particles from the air.
- Available in pocket lengths from 300mm to 625mm.
- Available with 20mm or 25mm header options.
- Non-standard sizes manufactured to order.
- Media tested to ISO 16890 and EN 779:2012.
Key benefits
- The large dust holding capacity extends service life thanks to the progressive media structure.
Typical applications
- General ventilation
- Pre-filtration for higher grade filters
- Air handling units
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Compare the range
How G3 – G4 compares with other bag filters
| Specification | G3 – G4 | M5 – F9 synthetic | M5 – F9 energy saving |
|---|---|---|---|
| EN 779 | G3 – G4 | M5 – F9 | M5 – F9 |
| ISO 16890 | ISO Coarse 50% – 60% | ePM10 55% – ePM1 85% | ePM10 55% – ePM1 85% |
| Media | 100% polypropylene pockets | 100% polypropylene synthetic, two-stage | 3-layer fibre media, endless edge-welded pockets |
| Header | Galvanised steel | Galvanised steel, metal or plastic header | Galvanised steel |
| Header depths | 20mm, 25mm | 20mm, 25mm, 30mm | 20mm, 25mm |
| Pocket lengths | 300mm – 625mm | 300mm – 625mm | 300mm – 625mm |
| Max temperature | Standard HVAC | Up to 80°C | Up to 80°C |
| Availability | Non-standard sizes made to order | Stocked sizes next-day, non-standard made to order | Non-standard sizes made to order |
M5 – F9M5 – F9 synthetic bag filters
Secondary filter, HEPA pre-filter
- ISO 16890
- ePM10 55% – ePM1 85%
- Pocket lengths
- 300mm – 625mm
M5 – F9M5 – F9 premium energy saving bag filters
Energy saving secondary filter, HEPA pre-filter
- ISO 16890
- ePM10 55% – ePM1 85%
- Pocket lengths
- 300mm – 625mm
FAQs
G3 – G4 bag filters: frequently asked questions
Synthetic Pocket Filters are designed for use in general ventilation and HVAC systems. They can be used as standalone filters or as pre-filters to protect higher-efficiency secondary filters, helping to improve air quality and extend filter service life.
Make an enquiry
Make an enquiry about G3 – G4 Bag 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 G3 – G4 bag filters?
Send the face size, pocket length, header depth, grade and quantity, or a photo of the existing label, and Maxi will confirm the right specification.