Why Choose the Finder 7F.21.8.230.5550 Reverse-Flow Filter Fan?
The Finder 7F.21.8.230.5550 is a high-capacity 230 V AC reverse-flow filter fan designed to provide effective ventilation and temperature management in industrial electrical enclosures. Part of the Finder 7F Series, this Size 5 unit delivers a nominal free-air flow of 550 m³/h at 50 Hz, making it suitable for electrical cabinets containing heat-generating automation, power distribution and control equipment.
Unlike conventional intake filter fans, the 7F.21 reverse-flow design extracts warm air from the electrical enclosure. When installed with a suitably positioned filtered air inlet, the fan helps establish an airflow path that removes accumulated heat while limiting the entry of airborne dust and contaminants.
Featuring 230 V AC operation, approximately 76 W rated power consumption, IP54 protection and a 320 × 320 mm external frame, the Finder 7F.21.8.230.5550 combines substantial ventilation capacity with practical enclosure installation. Its light grey RAL 7035 housing, snap-in mounting arrangement and replaceable filter media make it suitable for industrial control panel construction and maintenance.
Key Advantages
- 550 m³/h nominal free-air flow at 50 Hz for high-capacity electrical enclosure ventilation.
- 230 V AC supply suitable for compatible industrial electrical installations.
- Reverse-flow exhaust configuration helps remove accumulated warm air from control cabinets.
- 76 W rated power consumption for powered enclosure ventilation.
- IP54 protection rating when correctly installed.
- UL Type 12 enclosure classification for suitable indoor industrial applications.
- Size 5 construction designed for larger electrical cabinet ventilation requirements.
- Integrated replaceable filter mat helps manage airborne dust.
- Snap-in mounting system supports straightforward installation.
- RAL 7035 light grey finish complements standard industrial electrical enclosures.
- Compatible with appropriately sized exhaust filters and ventilation accessories.
- Supports effective cabinet temperature management where ambient air conditions permit.
Key Features
- Finder 7F Series industrial filter fan.
- Reverse-flow configuration for extracting warm enclosure air.
- Size 5 fan and filter assembly.
- 230 V AC nominal operating voltage.
- 50/60 Hz supply frequency.
- 550 m³/h free-air flow at 50 Hz.
- 605 m³/h free-air flow at 60 Hz.
- 400 m³/h airflow at 50 Hz with a compatible exhaust filter installed.
- 440 m³/h airflow at 60 Hz with a compatible exhaust filter installed.
- 76 W rated power consumption.
- IP54 protection rating.
- UL Type 12 classification.
- 320 × 320 mm external dimensions.
- 291 × 291 mm enclosure cut-out.
- Light grey RAL 7035 housing.
- Replaceable air filter mat.
- Snap-in enclosure mounting with provision for additional screw fixing.
- Designed for indoor electrical enclosure ventilation.
Technical Specifications
- Manufacturer: Finder
- Series: 7F Series
- Model: 7F.21.8.230.5550
- Product type: Reverse-flow industrial filter fan
- Installation environment: Indoor electrical enclosures
- Fan size: Size 5
- Nominal operating voltage: 230 V AC
- Supply frequency: 50/60 Hz
- 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 consumption: 76 W
- Airflow direction: Reverse flow / exhaust
- Number of fans: 1
- Noise emission: 75 dB(A)
- Filter: Integrated replaceable filter mat
- Protection rating: IP54
- NEMA classification: UL Type 12
- External width: 320 mm
- External height: 320 mm
- Enclosure cut-out: 291 × 291 mm
- Mounting method: Snap-in enclosure mounting
- Housing colour: Light grey, RAL 7035
- Voltage type: AC
- Application: Industrial electrical enclosure ventilation
High-Capacity Exhaust Ventilation for Industrial Automation Cabinets
Industrial electrical cabinets frequently contain equipment such as PLCs, variable speed drives, motor starters, power supplies and electronic control modules that generate heat during operation. The Finder 7F.21.8.230.5550 helps manage this heat by extracting warm internal air and supporting controlled airflow through the enclosure.
The reverse-flow exhaust arrangement is particularly useful when a fan is installed towards the upper section of a cabinet, where warm air naturally accumulates. A compatible filtered inlet positioned lower in the enclosure allows cooler ambient air to enter as the fan removes heated air, helping create an effective ventilation path around installed electrical components.
With a nominal free-air capacity of 550 m³/h at 50 Hz, the unit is designed for applications requiring substantial airflow. When used with a compatible exhaust filter, airflow is approximately 400 m³/h at 50 Hz. Actual installed performance depends on filter resistance, enclosure layout, ventilation openings and operating conditions.
The Finder 7F.21.8.230.5550 incorporates a replaceable filter mat that should be inspected regularly, particularly in dusty industrial environments. Correct filter maintenance, appropriate enclosure sizing and suitable airflow calculations help maintain reliable cooling performance and reduce excessive internal temperature rise.
Typical Applications
- Industrial electrical control cabinet ventilation.
- PLC and automation equipment enclosures.
- Motor control centres and machinery control 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.
- Industrial process control installations.
- OEM machine building and electrical panel construction.
- Large control cabinets requiring high-capacity exhaust ventilation.
- Industrial enclosure cooling upgrades and maintenance.
