We customise industrial fans and fan clutches to provide bespoke, fit-for-purpose fan solutions.
Explore our core fan solutions below – configured and customised around your requirements.
The H Series impellers manufactured by Multi-Wing are the smallest in diameter and therefore most suited to smaller cooling and ventilation applications, such as forklifts, farming machinery, and refrigeration units. The blade profile of the H Series varies from airfoil to sickle in increasing arcs depending on the airflow volume and static pressure required.
Rotation
CW + CCW
Diameter
200–742 mm
Pitch angle
25º–50º
Configuration
3–14 blades
Small impellers for high efficiency and low noise
H Series
Multi-Wing
Given the size of the Z Series impellers manufactured by Multi-Wing, they are suited to a variety of demanding applications, including heavy-duty vehicles, earth-moving equipment, trains, wood drying kilns, and radiator cleaning. Z Series fans can also be fabricated using truly reversible blades to produce equal airflow in both directions, making them perfect for underground applications.
Rotation
CW + CCW
Diameter
315–1,295 mm
Pitch angle
20º–50º
Configuration
3–16 blades
Medium-sized impellers for demanding airflow conditions
Z Series
Up to 2,400 mm in diameter, the W Series impellers manufactured by Multi-Wing can be powered by low-speed motors and still provide high-performance while consuming less energy, making them ideal for large gen sets, earth-moving equipment, and trains, as well as cooling towers. Unlike the H Series and Z Series impellers, those of the W Series allow for blade pitch angles of 1º increments.
Rotation
CW + CCW
Diameter
560–2,200 mm
Pitch angle
20º–50º
Configuration
3–13 blades
Large impellers for low power consumption and high performance
W Series
At a maximum diameter of 3,500 mm, the G Series axial impellers are the largest produced by Multi-Wing. They are ideal for large-scale applications that require high airflow volume, such as cooling towers, condensers, and HVAC/R. The G Series fans are highly efficient and particularly quiet. The G Series blades come in the 1G sickle and 10G airfoil profile – both of which can rotate counter- or clockwise – depending on the airflow volume and static pressure required.
Rotation
CW + CCW
Diameter
980–3,600 mm
Pitch angle
15º–50º
Configuration
3–8 blades
Extra-large impellers for high airflow volume and low noise
G Series
SPAL Automotive’s range of axial and centrifugal electric fans are engineered for reliability in even the harshest operating environments. Designed for compact installations where space or belt-driven options are limited, these fans deliver consistent, high-output airflow with excellent efficiency. Available in both 12 and 24 V DC, they feature sealed motors and durable construction, making them ideal for on- and off-road applications alike. We offer a variety of configurations – including puller and pusher options, different blade profiles, and variable speed control – so that your thermal system performs optimally, whatever the conditions.
High-performance fans for compact, efficient cooling solutions
Electric fans
SPAL Automotive
Mounting viscous clutches to your high-performance axial fans facilitates a much wider range of modulation than purely mechanical fans. The drives enable you to run fans on demand instead of perpetually, which puts the engine under a constant load, shortening its service life. Our viscous drives improve energy consumption – and therefore lower carbon emissions – and reduce noise. We custom design both bi-metal (air sensing) and electronically controlled fan clutches depending on the application requirements.
Please note: Our fan clutches are supplied for large-scale applications only and are not available for one-off purchases.
Viscous drives for modulating fans in a wide range of applications
Fan clutches
Cojali
Every application has different airflow, pressure, noise, space, and efficiency requirements. Share your operating conditions with us, and we’ll help match the right fan to your system.
Not sure which fan solution you need?
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© 2026 Inventive Air Designs (Pty) Ltd. All rights reserved.