Plate filter unit ePM10

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Overview
Cassette filters are commonly used as the primary filtration stage in air-conditioning and ventilation units. Production variants include flat media or machine-pleated (z-line) media to increase filtration surface. Depending on dimensions, additional reinforcement elements can be fitted. A dimension label on the frame ensures easy identification of the unit.

Construction

• Cassette filters — media lying flat: Frame made from galvanized sheet steel for long-term corrosion resistance. The filter medium is positioned between two galvanized steel support meshes that stabilize the medium. The frame is closed with a blind rivet.
• Cassette filters — pleated material (z-line): Frame made from galvanized sheet steel. The filter medium is machine-pleated and fixed to galvanized steel support mesh; the frame is closed with blind rivets and inductive welding.

Standards

• ISO 16890
• PN EN 779:2012

Fire rating

• F1 according to 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

• Common: 20 mm, 25 mm
• Also: 50 mm, 96 mm, 100 mm (range 6–100 mm)

Materials
Filter media consist of polyester or polypropylene fibres arranged with a progressive structure to ensure an optimal balance between filtration efficiency and pressure drop.

Cassette filters with thermosetting pleat (without steel mesh)
A technical solution using thermally treated non-woven media produces rigid pleats that can be installed in the frame without steel mesh support. Benefits include reduced weight and increased filtration area while maintaining required performance.

Structure

• Pleat height: 20–100 mm
• Frame thickness: 6–100 mm (typical 20–100 mm)
• Frame type: galvanized steel, plastic or cardboard

Technical data — cassette filters

• Classification (PN–EN 779:2012): G3 | G4 | M5
• Filtration effectiveness (ISO 16890): G3: ISO Coarse; G4: ISO Coarse; M5: ePM10 35–70%
• Reference frame dimensions (mm): 592 x 592 for typical references
• Construction: flat or pleated depending on thickness
• Airflow (typical per 592 x 592): ~2500 m³/h
• Initial pressure drop (Pa): G3: 20–45; G4: 30–55; M5: 50–75
• Recommended final pressure drop (Pa): G3/G4: 250; M5: 450
• Maximum operating temperature: plastic frame 80 °C; metal frame 100 °C
• Frame thickness range (mm): 6–100

Note
Final performance values are specified in the offer or on order according to measurement results and chosen configuration.

Application

• G2, G3, G4, M5 — used in HVAC units for spaces with average air cleanliness requirements (e.g. hotels, office buildings, shopping centres).

Characteristics / technical specifications

• Product type: Cassette filters (flat media or pleated / z-line)
• Standards: ISO 16890; PN EN 779:2012
• Fire rating: F1 according to DIN 53438
• Frame materials: galvanized sheet steel, plastic, cardboard
• Standard frame sizes: 592 x 592 mm; 287 x 592 mm; 625 x 500 mm (custom sizes on request)
• Frame thickness options: 6–100 mm (common: 20, 25, 50, 96, 100 mm)
• Pleat height range: 20–100 mm
• Filter media: polyester or polypropylene progressive-structure fibres
• Typical airflow per 592 x 592 filter: ~2500 m³/h
• Initial pressure drop (typical): G3: 20–45 Pa; G4: 30–55 Pa; M5: 50–75 Pa
• Recommended final pressure drop: G3/G4: 250 Pa; M5: 450 Pa
• Max. operating temperature: plastic frame 80 °C; metal frame 100 °C
• Manufacturer: BWF Envirotec — non-standard dimensions available on request or per customer drawings.