Why Choose the Finder 7F.21.8.230.5550.0 Black Reverse-Flow Filter Fan?
The Finder 7F.21.8.230.5550.0 is a high-capacity 230 V AC reverse-flow filter fan from the Finder 7F Series, designed to provide forced-air ventilation for industrial electrical cabinets and automation enclosures. This Size 5 model offers a nominal free-air flow of 550 m³/h at 50 Hz and features a black RAL 9004 finish, making it suitable for dark-coloured machinery panels and industrial control cabinets.
The 7F.21 reverse-flow configuration is designed to extract warm air from electrical enclosures. When paired with a suitably positioned filtered air inlet, the fan helps establish an effective ventilation path through the cabinet, reducing heat accumulation around power supplies, contactors, motor control equipment and electronic components.
Featuring 230 V AC operation, IP54 protection, a replaceable G3 filter mat and a 320 × 320 mm external frame, the Finder 7F.21.8.230.5550.0 combines substantial airflow capacity with practical installation and maintenance. Its black housing provides an alternative to the standard light grey version while retaining the core ventilation characteristics of the Size 5 range.
Key Advantages
- 550 m³/h free-air flow at 50 Hz for high-capacity electrical enclosure ventilation.
- 605 m³/h free-air flow at 60 Hz for compatible supply frequencies.
- 230 V AC operation for industrial electrical installations.
- Reverse-flow exhaust configuration helps remove warm air from electrical cabinets.
- Black RAL 9004 housing complements dark-finished industrial enclosures.
- IP54 protection rating when correctly installed.
- NEMA Type 12 classification for suitable indoor industrial applications.
- G3 filtration helps reduce airborne dust entering the ventilation system.
- Size 5 construction suitable for larger electrical cabinets.
- Replaceable filter mat supports straightforward maintenance.
- Snap-in mounting arrangement helps simplify enclosure installation.
- Supports cabinet temperature management where ambient conditions permit forced-air cooling.
Key Features
- Finder 7F Series reverse-flow filter fan.
- Size 5 fan and filter assembly.
- 230 V AC nominal operating voltage.
- 50/60 Hz supply frequency.
- 550/605 m³/h free-air flow at 50/60 Hz.
- 400/440 m³/h airflow at 50/60 Hz with a compatible exhaust filter installed.
- 76/116 W rated power at 50/60 Hz.
- Reverse-flow exhaust operation.
- Black RAL 9004 protective housing.
- IP54 protection rating.
- NEMA Type 12 classification.
- 320 × 320 mm external frame.
- 291 × 291 mm mounting cut-out.
- G3 filter mat according to EN 779.
- Push-in electrical terminals.
- Replaceable filter media for routine maintenance.
- Designed for indoor electrical enclosure ventilation.
Technical Specifications
- Manufacturer: Finder
- Series: 7F Series
- Manufacturer part number: 7F.21.8.230.5550.0
- Product type: Reverse-flow industrial filter fan
- Fan size: Size 5
- Nominal operating voltage: 230 V AC
- Supply frequency: 50/60 Hz
- Operating voltage range: 0.8 to 1.1 × nominal voltage
- Free-air flow at 50 Hz: 550 m³/h
- Free-air flow at 60 Hz: 605 m³/h
- Airflow with exhaust filter at 50 Hz: 400 m³/h
- Airflow with exhaust filter at 60 Hz: 440 m³/h
- Rated power at 50 Hz: 76 W
- Rated power at 60 Hz: 116 W
- Current consumption at 50 Hz: 0.34 A
- Current consumption at 60 Hz: 0.49 A
- Noise level: 75 dB(A)
- Airflow direction: Reverse flow / exhaust
- Filter classification: G3 according to EN 779
- Filter efficiency: 80–90%
- Filter material: Synthetic fibre
- Housing material: Plastic according to UL94 V-0
- Housing colour: Black, RAL 9004
- Protection rating: IP54
- NEMA classification: Type 12
- External frame dimensions: 320 × 320 mm
- Mounting cut-out: 291 × 291 mm
- Mounting method: Snap-in enclosure mounting
- Electrical connection: Push-in terminals
- Conductor cross-section: 0.7–2.5 mm²
- Nominal service life at 40 °C: 50,000 hours
- Application: Indoor industrial electrical enclosure ventilation
High-Capacity Exhaust Ventilation for Industrial Automation
Industrial electrical cabinets frequently contain heat-generating equipment such as variable speed drives, motor starters, power supplies, programmable logic controllers and electronic monitoring devices. The Finder 7F.21.8.230.5550.0 helps manage internal cabinet temperatures by extracting heated air and supporting the movement of cooler ambient air through the enclosure.
The reverse-flow exhaust arrangement is particularly useful where the ventilation design requires warm air to be removed from the upper section of a control cabinet. When combined with an appropriately positioned filtered inlet, this arrangement establishes an airflow path through the electrical enclosure and helps dissipate heat generated by installed components.
The fan provides 550 m³/h free-air flow at 50 Hz and 605 m³/h at 60 Hz. With a compatible exhaust filter installed, the corresponding airflow figures are 400 m³/h and 440 m³/h. Actual performance depends on enclosure resistance, filter condition, cabinet layout and ambient temperature.
The black RAL 9004 finish makes this model suitable for machinery and control cabinets where a dark external appearance is preferred. Its replaceable filter mat supports routine servicing, helping maintain effective airflow in industrial environments where airborne dust may otherwise restrict ventilation.
Typical Applications
- Industrial electrical control cabinet ventilation.
- PLC and automation equipment enclosures.
- Motor control centres and machinery panels.
- Variable speed drive and softstarter cabinets.
- Electrical distribution and switchgear enclosures.
- Industrial power supply and relay cabinets.
- Manufacturing and production machinery.
- Packaging and material handling equipment.
- Process control and monitoring installations.
- OEM electrical panel building.
- Black-finished industrial control cabinets.
- Large enclosures requiring high-capacity exhaust ventilation.
