BWF Envirotec air conditioning filters cassette filters
BWF Envirotec klimatyzacja filtry kasetowe

Cassette filters
Commonly used filters for pre-treatment

Cassette filters are most frequently used as the first filtration level in air conditioning and ventilation units. Our technical potential enables us to produce filters using a minipleat filter medium (to increase filter surface) or lying flat. Depending on the dimensions of the filter, additional bars are installed. The unit is branded with a dimension label to help to identify the product properly.

Standards:

Cassette filters are manufactured to standards:

  • ISO 16890

  • PN EN 779:2012

Fire rating:

  • F1 wg DIN 53438

Standard dimensions:

Frame made from galvanized sheet metal, plastic or cardboard:

  • 592 x 592 mm

  • 287 x 592 mm

  • 625 x 500 mm

Frame thickness:

  • 20 mm, 25 mm,

  • 50 mm, 96 mm, 100 mm

BWF Envirotec manufactures non-standard dimensions upon request or according to drawings and specifications of our customers.

Materials:

Arrangement of polyester or polypropylene fibres with a progressive structure guarantees a minimum ratio between filter efficiency and resistance.

Construction:

Cassette filters - media lying flat

A filter frame made of galvanised sheet steel guarantees long-term corrosion resistance. A filter medium is positioned between two meshes made from galvanized sheet steel.
Meshes enable stabilization and proper functioning of the filter medium. The frame is closed with a blind rivet.

Cassette filters - pleated material (z-line)

A filter frame made of galvanised sheet steel guarantees long-term corrosion resistance. The filter medium is pleated by machine on galvanised sheet steel mesh. The mesh enables stabilization and proper functioning of the filter medium. The frame is closed with a blind rivet and inductively welded.

Technical data cassette filters:

Classification according to the standards of PN - EN 779:2012   G3 G4 M5
Filtration effectiveness according to ISO 16890* % COARSE COARSE ePM10 35-70
Frame dimensions mm 592 x 592 592 x 592 592 x 592
Construction   flat or pleated, depending on the thickness flat or pleated, depending on the thickness flat or pleated, depending on the thickness
Airflow m³/h 2500 2500 2500
Initial pressure drop Pa 20 - 45 30 - 55 50 - 75
Recommended final pressure drop Pa 250 250 450
Max. permissible operating pressure °C plastic frame 80; metal frame 100 plastic frame 80; metal frame 100 plastic frame 80; metal frame 100
Frame thickness mm 6 - 100 6 - 100 6 - 100

*final results are given in the offer or when ordering

Application:

  • G2, G3, G4, M5 – used in air-conditioning and ventilation units in rooms with average requirements of air purity e.g.: hotels, office buildings, shopping centres etc.

Air conditioning filters of BWF Envirotec, Polska at a glance

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