

Extended Surface Pocket Filter
- Synthetic pocket filters are constructed with synthetic media and assembled in galvanised steel or aluminium extrusion frame.
- Pocket filter offers high-efficiency filtration while maintaining a low resistance to airflow.
- Synthetic pocket filters are constructed with synthetic media and assembled in galvanised steel or aluminium extrusion frame.
- Pocket filter offers high-efficiency filtration while maintaining a low resistance to airflow.


What is a secondary air filter in industrial HVAC systems?
A secondary air filter is used after a primary filter to further capture smaller particles, improving indoor air quality and protecting sensitive equipment in industrial settings.
What’s the difference between primary and secondary air filters?
Primary filters capture larger particles like dust and debris, while secondary filters trap finer particles such as pollen, mold spores, and microscopic pollutants.
Where are secondary air filters used in industrial applications?
They are commonly used in cleanrooms, pharmaceutical production, food processing plants, and other environments where high-efficiency air purification is required.
How often should I replace secondary air filters in an industrial system?
Replacement depends on usage and environment but typically ranges from every 3 to 6 months. High-dust or sterile environments may require more frequent changes
What efficiency ratings are available for Vicfil secondary filters?
Vicfil offers a range of efficiency options to match your needs—from MERV 8 to MERV 14, and equivalent EU grades.