Roof fans made of plastic by HLU

• Corrosion-resistant plastics - durable against aggressive media
• Weatherproof design | Safe drainage of rainwater - ideal for outdoor use
• Compact construction is optimal for confined installation situations
• Easy flange mounting enables quick and safe installation
• Various versions for different performance ranges and installation situations
• Comprehensive accessories provide flexible adaptation options for various requirements

• Reliable extraction of corrosive gases and contaminated air streams
• Safe handling of air in potentially explosive environments (Ex Zone 1 and Ex Zone 2)

• Internal motors separated from the airflow are protected from aggressive media
• No metal parts in the airflow
• Motor options: Use of explosion-proof motors (Ex-motors) or energy-efficient EC motors
• ATEX option: Explosion-proof motors for Zone 1 and Zone 2
• Standard equipment: Equipped with a repair switch or explosion-proof terminal box for safe and convenient maintenance
• Versatile material options: Available in PPs, PPs-el, PVC, and more

• Volume flow: 50 - 3,500 m³/h
• Maximum pressure difference: Up to 1,400 Pa
• Available in 6 nominal sizes: Suction diameters from 110 to 315 mm

• Volume flow: 500 - 8,000 m³/h
• Maximum pressure difference: Up to 1,400 Pa
• Available in 3 nominal sizes: Suction diameters from 315 to 400 mm

• Volume flow: 4,000 - 40,000 m³/h
• Maximum pressure difference: Up to 1,000 Pa
• Available in 5 nominal sizes: Suction diameters from 500 to 1000 mm

HF - Roof Fan

Corrosion-resistant plastic roof fan with a robust, rotationally sintered housing made of PEs, featuring single-sided suction. Equipped with splinter protection in accordance with accident prevention regulations, starting from size 160, as plastic-coated wire mesh.

When mounted vertically, the exhaust air is discharged vertically according to the requirements for contaminated exhaust air. All components exposed to the exhaust air medium are made of plastic or are plastic-coated.

The impeller features backward-curved blades in an injection-molded design, securely mounted on the motor shaft using a taper-lock bushing. The impeller is statically and dynamically balanced, meeting a balancing quality of at least G 6.3 (DIN ISO 21940-11).

Includes an internal motor encapsulated against the exhaust medium and an externally mounted repair switch for standard motors (without explosion protection) or an externally mounted terminal box for explosion-proof motors. The required external ventilation for the motor is provided through externally routed ducts.

HF - Roof Fan
Version with EC Motor

Corrosion-resistant plastic roof radial fan with a robust, rotationally sintered housing, featuring single-sided suction. The fan is equipped with splinter protection according to accident prevention regulations, starting from size 160, using plastic-coated wire mesh.

When mounted vertically, the exhaust air is discharged vertically in compliance with the requirements for contaminated exhaust air. All components exposed to the exhaust air medium are made of plastic or are fully encapsulated in plastic.

The impeller features backward-curved blades in an injection-molded design, securely mounted on the motor shaft using a taper-lock bushing. The impeller is statically and dynamically balanced, achieving a balancing quality of at least G 6.3 (DIN ISO 21940-11).

Includes a highly efficient internal EC motor, encapsulated against the exhaust medium, and an externally mounted repair switch. The required external ventilation for the motor is provided through externally routed ducts.

HF - Roof Fan

Corrosion-resistant plastic roof fan with a housing made of thermoplastic plastics, featuring a robust, deep-drawn design with single-sided suction. Equipped with splinter protection according to accident prevention regulations (UVV) using plastic-coated wire mesh.

When mounted vertically, the exhaust air is discharged vertically according to the requirements for contaminated exhaust air. All components exposed to the exhaust air medium are made of plastic or are fully plastic-coated. The shaft passage is minimized using a felt ring seal.

The impeller features backward-curved blades, mounted cantilevered on the motor shaft, and is statically and dynamically balanced with a balancing quality of at least G 6.3 (DIN ISO 21940-11).

Includes an internal motor encapsulated against the exhaust medium and an externally mounted repair switch for standard motors (without explosion protection) or an externally mounted terminal box for explosion-proof motors. The required external ventilation for the motor is provided through externally routed ducts.

HF - Roof Fan

Corrosion-resistant plastic roof fan with a housing made of thermoplastic plastics, featuring a robust, welded design with single-sided suction. The fan is equipped with splinter protection according to accident prevention regulations (UVV) using plastic-coated wire mesh.

When mounted vertically, the exhaust air is discharged vertically according to the requirements for contaminated exhaust air. All components exposed to the exhaust air medium are made of plastic or are fully plastic-coated. The shaft passage is minimized using a felt ring seal.

The impeller features backward-curved blades, mounted cantilevered on the motor shaft, and is statically and dynamically balanced with a balancing quality of at least G 6.3 (DIN ISO 21940-11).

Includes an internal motor encapsulated against the exhaust medium and an externally mounted repair switch for standard motors (without explosion protection) or an externally mounted terminal box for explosion-proof motors. The required external ventilation for the motor is provided through externally routed ducts.

HLU Roof Fans with EC Technology: Efficiency Meets Modern Control

HLU roof fans with EC technology combine maximum efficiency with advanced control technology, offering a sustainable exhaust air solution for a wide range of applications.

The latest EC technology significantly reduces power consumption while allowing precise and stepless speed control.

Advantages of EC Technology:

• Energy-efficient: Significantly lower power consumption compared to conventional motors
• High efficiency: Optimized performance with minimal energy use
• Stepless control: Perfect adaptation to individual air requirements
• Easy integration: Plug-and-play solution

ATEX version
Zone 2 inside / no zone outside

• Housing and impeller
  made of electrically conductive and flame-retardant PPs-el
• Shaft seal
  for maximum operational safety and protection against leakage
• Optional protective grid
  on the suction and outlet sides for protection against foreign bodies
• Type label with Ex marking and documentation
  for easy identification and compliant use in zone 1 and 2

ATEX version
zone 2 inside / zone 2 outside

• Housing and impeller
  made of electrically conductive and flame-retardant PPs-el
• Shaft seal
  for maximum operational safety and protection against leakage
• Optional protective grid
  on the suction and outlet sides for protection against foreign bodies
• Motor for single-stage network operation
  II 2G Ex eb II T3 Gc
• Motor for inverter operation
  II 2G Ex db eb IIC T4 Gb with PTC
• Type label with Ex marking and documentation
  for easy identification and compliant use in zone 1 and 2

ATEX version
zone 1 inside / zone 2 outside or
zone 1 inside / zone 1 outside

• Housing and impeller
  made of electrically conductive and flame-retardant PPs-el
• Shaft seal
  for maximum operational safety and protection against leakage
• Optional protective grid
  on the suction and outlet sides for protection against foreign bodies
• Motor for single-stage network operation
  II 2G Ex eb II T3 Gc
• Motor for inverter operation
  II 2G Ex db eb IIC T4 Gb with PTC
• Type label with Ex marking and documentation
  for easy identification and compliant use in zone 1 and 2