Pocket filters – high dust holding HVAC air filters (ISO 16890)

Pocket filters – versatile and efficient air filtration for HVAC systems

Pocket filters are among the most commonly used air filters in ventilation, air conditioning and heating systems. They are designed to provide high dust holding capacity, stable airflow and reliable filtration performance, even under demanding operating conditions.

Thanks to their pocket-shaped construction, these filters can absorb and store large amounts of contaminants, making them suitable for use as pre-filters or main filters in a wide range of commercial and industrial HVAC installations.

Filtration performance and ISO 16890 classes

Pocket filters supplied by Filtra International are available in multiple ISO 16890 filtration classes, allowing precise selection based on air quality requirements:

• ISO Coarse 60–65%

• ePM10 50–70%

• ePM10 65–75%

• ePM2.5 70%

• ePM1 65%

This wide performance range enables pocket filters to be used in environments with average to high air cleanliness requirements, from comfort ventilation to more demanding applications.

Filter media and materials

Pocket filters are manufactured using synthetic polyester fibers arranged in a progressive fiber structure. This construction provides an optimal balance between:

• Filtration efficiency

• Dust holding capacity

• Low airflow resistance

• Stable system performance

The progressive structure ensures that larger particles are captured first, while finer contaminants are retained deeper in the filter media.

Construction variants

Pocket filters are available in different frame constructions to match installation and durability requirements.

Pocket filters with metal frame

• Frame made of galvanized steel sheet for corrosion resistance

• Filter pockets solidly machine-stitched for durability

• Pockets mounted using steel wires and temperature-resistant adhesive

• High mechanical stability and long service life

Pocket filters with plastic frame

• Frame made of durable black plastic

• Pocket sides reinforced with technical foam

• Ensures tightness, stability and reliable operation

• Lightweight construction for easy handling

Typical applications

Pocket filters are widely used in ventilation and air conditioning systems across many sectors, including:

• Hotels

• Office buildings

• Shopping centres

• Public buildings

• Hospitals and healthcare facilities

• Food production plants

• Electronics and clean manufacturing environments

Lower filtration classes (ISO Coarse, ePM10) are typically used for standard comfort applications, while higher classes (ePM2.5, ePM1) are selected for high air cleanliness requirements.

System integration

Pocket filters are commonly installed as pre-filters, extending the service life of higher-efficiency filters, or as main filters in systems where their filtration class meets the required air quality level.

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Custom dimensions – manufactured to order

Pocket filters supplied by Filtra International are manufactured to order and can be supplied in custom dimensions.

• Custom length × width × height (mm)

• Suitable for standard and bespoke HVAC housings

• Ideal for retrofit and new installations

Manufacturing origin & quality

All pocket filters supplied by Filtra International are manufactured in Europe, ensuring:

• Consistent production quality

• Reliable materials and workmanship

• Compliance with European manufacturing standards

Product configuration & quotation

Pocket filters are supplied on a quotation basis, allowing configuration of:

• Filtration class (ISO Coarse / ePM10 / ePM2.5 / ePM1)

• Frame type (metal or plastic)

• Exact dimensions

• Required quantity