General Purpose Bag Air Filter G3 – G4 to EN779
General Purpose Bag Filter are available in low to medium efficiency grades and are used in heating, ventilation systems and air conditioning systems (HVAC), and kitchen extract systems. Bag Filters are manufactured from a high lofted non woven synthetic material with a galvanised header frame this filter offers higher air flow rates and a greater dust holding capacity than a panel filter.
01277 523 655
Data Sheet
What size is your General Purpose Bag Filter?
If you don't know a section, leave it blank and we can help, or Click Here to get in contact.
General Purpose Bag Air Filter Applications
A G4 Grade General Purpose Bag Air Filter is a medium efficiency multi-pocket synthetic media bag filter providing low resistance combined with high dust holding capacities.
Low grade G3 Pocket Bag Filters are generally used as a pre-filter for higher grades of air filtration, or for use as a simple filter for general applications.
General Purpose Bag Filter Construction
The HVAC Bag Filters pockets are produced from thermally bonded polyester fibres that are specifically designed for air filtration. The pockets are retained in a rigid galvanised steel channel.
The G4 Bag Filter is available in a range of standard sizes and pocket lengths and can be manufactured in non standard sizes to suit most applications.
Max Temperature: 100°C
Max Humidity: 100% RH no free moisture
Dimensions to pocket ratio guide
| Header HxWxD Actual size in mm | No. of Pockets |
| 592x592x20mm | 6 |
| 592x490x20mm | 5 |
| 592x287x20mm | 3 |
Sizing a Bag Filter
What do we need to know when you call or email us to order or inquire about bag filters?
When ordering a HVAC bag filter, the information we need from you is:
- Height of the bag filter
- Width of the bag filter
- Depth of the metal header
- Length of the Pockets
- How many pockets there are
Call us on: 01277 634 637
Or Email us at: info@thefilterbusiness.com
Low Grade Pocket Filter Performance Guide
| Average efficiency EN 779 Rating | Filter Depths | Rated Airflow | Initial Resistance | Final Resistance | Average Arrestance |
| G4 | 300mm (12″) | 0.9m3/s | 50pa | 200pa | 80-90% |
| G4 | 450mm (24″) | 1.4m3/s | 50pa | 200pa | 80-90% |
| G4 | 600mm (18″) | 1.6m3/s | 50pa | 200pa | 80-90% |
The above information is based on a full sized filter 592x592x20mm
Alternative: High Efficiency Bag Filters
For medium to fine (M5-F9) filtration check out our high efficiency bag filter range.
