Roof fans
plastic roof fans – reliable external ventilation
HLU’s roof fans are designed for vertical intake and installation outside the building. They can also be installed horizontally with the appropriate accessories. They are especially suitable for use in buildings without a ventilation plant and are used in laboratories (fume hoods), schools and research facilities, among others. The exhaust air is blown vertically upwards, minimising the deposition of aggressive substances on the roof. The internal motor is separated from the air flow and therefore does not come into contact with the aggressive conveyed medium. Rainwater that falls into the discharge opening exits at the bottom of the housing, thus preventing water from entering the piping connected to the suction opening. For use in potentially explosive areas, we can also supply the HF roof fans in an explosion-proof version for zones 2 and 1 in accordance with ATEX.

Roof fans
HF D 15/17
- can be used in all applications with small and medium air volumes
- ideal for extraction from fume hoods in buildings without a ventilation plant
- optionally suitable for installation in and extraction from ATEX zone 2 and 1
- also available with EC motor
- volume flow from 50 to 3500 m³/h
- at a maximum pressure difference of 1400 Pa
- available in 6 nominal diameters from 110 to 315 mm intake diameter
Volume flow | 50 to 3.500 m³/h |
---|---|
Pressure difference | 1.400 Pa |
Nominal diameters | 6 nominal diameters from 110 to 315 mm |
Operating temperature | 0 – 40°C |
Housing material | UV-resistant PEs, PE-el |
Impeller material | PPs, PPs-el |
Drive system | direct drive |
Atex | optionally suitable for installation in and extraction from ATEX zone 2 |
Design | fitted as standard with repair switch or explosion-proof terminal box |
Connection options | flange |
Advantages:
- corrosion resistant
- weatherproof
- safe rainwater drainage
- compact design
- easy installation on flange
- comprehensive range of accessories
- motor mounted outside the airflow
- use of different motors (explosion-proof motors) possible
The following accessories are recommended for this product:

Roof fans
HF D 16
- volume flow from 500 to 8000 m³/h
- at a maximum pressure difference of 1400 Pa
- available in 3 nominal diameters from 315 to 400 mm
- Volumenstrom von 500 – 8.000 m³/h
- at a maximum pressure difference of 1.400 Pa
- available in 3 nominal diameters from 315 to 400 mm
Volume flow | 500 to 8.000 m³/h |
---|---|
Pressure difference | 1.400 Pa |
Nominal diameters | 3 nominal diameters from 315 to 400 mm |
Operating temperature | 0 – 40 °C |
Housing material | PPs, PPs-el, PVC |
Impeller material | PPs |
Drive system | direct drive |
Atex | optionally suitable for installation in and extraction from ATEX zone 2 or ATEX zone 1 in electrically conductive version |
Design | fitted as standard with repair switch or explosion-proof terminal box, shaft gap with seal |
Connection options | flange |
Advantages:
- corrosion resistant
- weatherproof
- safe rainwater drainage
- compact design
- easy installation on flange
- comprehensive range of accessories
- motor mounted outside the airflow
- use of different motors (explosion-proof motors) possible
The following accessories are recommended for this product:

Roof fans
HF D 13
- can be used in all applications with large air volumes
- ideal for collected exhaust air and direct indoor exhaust air without duct systems
- optionally suitable for installation in and extraction from ATEX zones 2 and 1
- volume flow from 4000 to 40000 m³/h
- at a maximum pressure difference of 1000 Pa
- available in 5 nominal diameters from 500 to 1000 mm intake diameter
Volume flow | 4.000 to 40.000 m³/h |
---|---|
Pressure difference | 1.000 Pa |
Nominal diameters | 5 nominal diameters from 500 to 1000 mm |
Operating temperature | 0 – 40°C |
Housing material | PP, PPs, PVC |
Impeller material | PPs |
Drive system | direct drive |
Atex | optionally suitable for installation in and extraction from ATEX zone 2 or ATEX zone 1 in electrically conductive version |
Design | fitted as standard with repair switch or explosion-proof terminal box, shaft gap reduced to minimum with felt ring seal |
Connection options | flange |
Advantages:
- corrosion resistant
- weatherproof
- safe rainwater drainage
- compact design
- easy installation on flange
- comprehensive range of accessories
- motor mounted outside the airflow
- use of different motors (explosion-proof motors) possible
The following accessories are recommended for this product: