Why Choose the Finder 7F.21.8.120.5550.0 Black Reverse-Flow Filter Fan?
The Finder 7F.21.8.120.5550.0 is a high-capacity 120 V AC reverse-flow filter fan designed for ventilation and temperature management in industrial electrical enclosures. Part of the Finder 7F Series, this Size 5 unit combines a nominal 550 m³/h airflow rating with a distinctive black finish for electrical cabinets, automation control panels and machinery enclosures.
The 7F.21 reverse-flow configuration is designed for extracting warm air from electrical enclosures. By removing heated internal air and allowing replacement air to enter through a suitable filtered inlet, the fan helps maintain operating temperatures for electrical and electronic equipment.
Featuring a 120 V AC supply, approximately 102 W power consumption and a Size 5 enclosure-mounted construction, the Finder 7F.21.8.120.5550.0 provides a practical ventilation solution for demanding industrial applications. The final .0 suffix identifies the black version, distinguishing it from the standard-colour Finder 7F.21.8.120.5550.
Key Advantages
- 550 m³/h nominal airflow rating for high-capacity industrial enclosure ventilation.
- 120 V AC operation for compatible electrical control systems.
- Reverse-flow exhaust configuration helps remove accumulated heat from electrical cabinets.
- Black finish suitable for dark-coloured industrial enclosures and control panels.
- Size 5 construction for larger electrical cabinet ventilation requirements.
- Integrated filtration arrangement supports controlled enclosure airflow.
- Helps maintain suitable operating conditions for heat-generating electrical components.
- UL Type 12 enclosure classification for suitable indoor industrial installations.
- Suitable for use with compatible filtered air inlets and ventilation accessories.
- Supports routine inspection and maintenance of the cabinet ventilation system.
- Provides a practical alternative to active refrigeration-based cooling where ambient conditions permit.
- Suitable for OEM electrical panel construction and enclosure cooling upgrades.
Key Features
- Finder 7F Series industrial filter fan.
- Reverse-flow exhaust fan configuration.
- Size 5 fan and filter assembly.
- 120 V AC nominal operating voltage.
- 550 m³/h nominal airflow rating.
- 356 CFM nominal free-air flow.
- 102 W rated power consumption.
- Black housing and protective cover.
- Designed for electrical enclosure ventilation.
- Integrated filter arrangement.
- Suitable for installation in compatible industrial control cabinets.
- UL Type 12 classification.
- Compatible with appropriately sized filtered air inlet arrangements.
- Designed for continuous enclosure ventilation applications.
Technical Specifications
- Manufacturer: Finder
- Series: 7F Series
- Model: 7F.21.8.120.5550.0
- Product type: Reverse-flow industrial filter fan
- Fan size: Size 5
- Nominal operating voltage: 120 V AC
- Nominal airflow rating: 550 m³/h
- Free-air flow: 356 CFM
- Rated power consumption: 102 W
- Airflow configuration: Reverse flow / exhaust
- Housing colour: Black
- Product variant: Black version (.0 suffix)
- Enclosure classification: UL Type 12
- Installation: Electrical enclosure mounting
- Ventilation application: Industrial electrical cabinet cooling
- Filter arrangement: Integrated filtration assembly
High-Capacity Exhaust Ventilation for Industrial Automation Cabinets
Industrial electrical enclosures can accumulate significant heat from equipment such as programmable logic controllers, motor starters, variable speed drives, power supplies and electronic control modules. The Finder 7F.21.8.120.5550.0 provides forced-air ventilation to help remove this heat and support reliable equipment operation.
Its reverse-flow exhaust design removes warm air from the enclosure. When paired with a suitably positioned filtered air inlet, the ventilation system allows cooler ambient air to replace the exhausted air. This arrangement can help establish a controlled airflow path through the cabinet, improving heat dissipation around installed electrical components.
The unit is rated at 550 m³/h nominal airflow, while the free-air performance is also identified as approximately 356 CFM. Actual installed airflow depends on factors such as filter resistance, cabinet construction, ventilation openings and operating conditions. Correct enclosure cooling calculations should therefore be completed before selecting the fan.
The black housing makes this variant particularly suitable for dark-finished machinery cabinets and electrical panels where a consistent external appearance is required. Regular filter inspection and maintenance help maintain effective ventilation performance over the service life of the installation.
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.
- OEM machine building and electrical panel construction.
- Black-finished industrial electrical enclosures.
- Large control cabinets requiring high-capacity exhaust ventilation.
- Industrial enclosure cooling upgrades and maintenance.
