Why Choose the Finder 7F.21.9.024.2055.0 Reverse Flow Filter Fan?
The Finder 7F.21.9.024.2055.0 is a compact and reliable 24 V DC reverse flow exhaust filter fan designed for ventilation and thermal management in industrial electrical enclosures, control cabinets and switchboards. As part of the Finder 7F Series, this Size 2 filter fan provides forced-air ventilation to help dissipate heat generated by electrical and electronic equipment.
Featuring a 55 m³/h free-air flow rate and a low 7 W power consumption, the 7F.21.9.024.2055.0 is suitable for compact industrial enclosures requiring efficient airflow. Its reverse flow configuration is designed to extract air from electrical cabinets, providing flexibility when arranging ventilation openings and managing internal temperatures.
The model features a black housing, IP54 ingress protection and a replaceable synthetic fibre filter mat. With compact dimensions of approximately 155 × 155 × 66.2 mm, the fan can be integrated into suitable electrical cabinet walls, making it a practical choice for industrial automation, machine control and electrical distribution applications.
Key Advantages
- Compact reverse flow exhaust filter fan for electrical enclosure ventilation.
- 55 m³/h free-air flow rate supports effective cabinet cooling.
- 24 V DC supply suitable for industrial automation and control systems.
- Low 7 W rated power consumption supports energy-efficient operation.
- IP54 ingress protection helps protect electrical equipment against dust and water splashes.
- NEMA Type 12 classification for suitable industrial enclosure applications.
- Size 2 compact design minimises space requirements.
- Black housing suitable for dark-coloured industrial cabinet installations.
- Replaceable G3 synthetic fibre filter mat simplifies maintenance.
- Low 46 dB(A) noise level supports quieter operation.
- Snap-in mounting arrangement reduces installation time.
- Designed for dependable ventilation in industrial control environments.
Key Features
- Finder 7F Series electrical enclosure ventilation product.
- 7F.21 reverse flow exhaust filter fan configuration.
- Size 2 enclosure mounting format.
- 24 V DC nominal supply voltage.
- 55 m³/h free-air flow capacity.
- 40 m³/h airflow with a compatible exhaust filter installed under specified test conditions.
- 7 W rated power.
- 0.32 A nominal current consumption.
- IP54 protection rating according to EN 60529.
- NEMA Type 12 enclosure protection classification.
- G3 filter mat according to EN 779.
- 46 dB(A) nominal acoustic noise level.
- 50,000-hour nominal service life at 40 °C.
- Flame-retardant plastic housing according to UL94 V-0.
- Push-in electrical terminals for convenient wiring.
- Snap-in mounting for electrical enclosure installation.
Technical Specifications
- Manufacturer: Finder
- Series: 7F Series
- Model: 7F.21.9.024.2055.0
- Product type: Reverse flow exhaust filter fan
- Fan configuration: Reverse flow
- Size: 2
- Rated supply voltage: 24 V DC
- Operating voltage range: 19.2–26.4 V DC
- Free-air flow rate: 55 m³/h
- Airflow with exhaust filter: 40 m³/h
- Rated power: 7 W
- Nominal current consumption: 0.32 A
- Noise level: 46 dB(A)
- Nominal service life: 50,000 hours at 40 °C
- Protection rating: IP54
- NEMA classification: Type 12
- Filter classification: G3 according to EN 779
- Filter efficiency: 80–90% according to EN 779 G3 classification
- Filter material: Synthetic fibre with progressive filtration structure
- Filter temperature resistance: Up to +100 °C
- Filter flame behaviour: Self-extinguishing, Class F1 according to DIN 53438
- Housing material: Flame-retardant plastic, UL94 V-0
- Housing colour: Black
- Ambient operating temperature: −15 to +55 °C
- Overall dimensions (H × W × D): 155 × 155 × 66.2 mm
- Mounting type: Snap-in enclosure wall mounting
- Electrical connection: Push-in terminals
- Conductor cross-section: 0.7–2.5 mm²
- Compatible exhaust filter family: Finder 7F Series Size 2
Reliable 24 V DC Reverse Flow Ventilation for Electrical Cabinets
The Finder 7F.21.9.024.2055.0 is designed to help maintain suitable temperatures within electrical enclosures containing heat-generating equipment such as PLCs, power supplies, contactors, relays and motor controllers. Its powered ventilation system provides an effective method of moving warm air through the cabinet, reducing the risk of excessive internal temperatures.
Unlike conventional intake filter fans, the 7F.21 reverse flow configuration moves air in the opposite direction, allowing the unit to function as an exhaust fan. This provides flexibility in the positioning of cabinet ventilation openings and supports controlled airflow through suitable enclosure filtration systems.
The fan provides a nominal free-air capacity of 55 m³/h, with approximately 40 m³/h available when used with a compatible exhaust filter under the manufacturer's specified test conditions. Its replaceable G3 filter mat, IP54-rated construction and compact Size 2 housing make it suitable for industrial enclosure thermal management.
Typical Applications
- Industrial PLC and automation control cabinets.
- 24 V DC electrical control systems.
- Electrical distribution and switchgear enclosures.
- Power supply and electronic control cabinets.
- Motor control and variable frequency drive panels.
- Industrial machinery and manufacturing equipment.
- Packaging and production automation systems.
- Process control and instrumentation enclosures.
- Telecommunications and infrastructure equipment cabinets.
- OEM machine-building and compact electrical enclosure cooling systems.
