Specifying the wrong industrial fan does not just affect airflow. It affects compliance, energy costs, worker safety, and in some cases the ability to legally enter a confined space. The range of industrial fan types is wide, the terminology overlaps across categories, and the consequences of a mismatched specification range from poor performance to serious risk.
With more than 40 years of experience across Australian industrial, manufacturing, mining, and food processing environments, Fanquip has built and supplied fans across every category in this guide. Use it to understand what each fan type does, where it performs best, and where a different option would serve better.
How Industrial Fans Are Categorised
Industrial fans are divided into six functional categories based on what they are designed to achieve: extraction and exhaust, air movement and circulation, confined space and pressure ventilation, filtration while moving air, and heating.
Within each category, the choice between fan types depends on two primary performance variables: airflow volume (measured in L/s for HVAC contexts per AS 1668.2, or m³/h for general industrial and confined space applications) and static pressure (measured in Pa). A fan that moves high volume at low pressure is a different tool from one that maintains airflow against significant duct resistance.
Understanding the category first narrows the selection significantly before any performance specification is considered. A fan selected from the wrong category cannot be compensated for by adjusting its size or speed. Extraction fans exhaust air out of a building. Circulation fans redistribute air within it. Purging fans deliver airflow to inaccessible zones through ducting. These are not interchangeable functions, and matching the category to the application is the most critical step in any fan specification.
Extraction and Exhaust Fans
Extraction and exhaust fans are the most commonly specified category in industrial facilities. Their function is to remove air from a space, whether that air carries heat, fumes, dust, steam, moisture, or contaminants, and replace it with fresh air drawn in through separate supply points.
Axial Flow Fans
An axial flow fan moves air parallel to its rotating shaft, making it the most direct and efficient tool for moving large volumes of air at low to moderate static pressure. The fan draws air in through the inlet and discharges it axially, with minimal pressure rise across the unit.
For a detailed technical overview, see what is an axial flow fan.
Axial fans are the standard choice across warehousing and logistics, manufacturing, food processing, construction sites, agriculture, and mining surface operations where general ventilation, heat exhaust, or fresh air supply is needed and duct runs are short.
High-temperature axial variants operate continuously in environments up to 100°C, making them suitable for furnace rooms and kiln exhausts. Axial fans are not suited to applications with long duct runs or significant system resistance, where the pressure requirement exceeds their performance range and a centrifugal fan is required instead.
Browse the axial flow fan range.
Centrifugal Fans
A centrifugal fan spins air outward at right angles to its inlet using centrifugal force, generating significantly higher static pressure than an axial fan at equivalent airflow volumes. Blade variants include backward curved fans, backward inclined fans, and forward curved fans, each with different efficiency, noise, and pressure characteristics. Backward curved fans are the most energy-efficient option for sustained high-pressure operation and are widely used in industrial ducted systems.
Centrifugal fans suit manufacturing plants with complex ducted ventilation systems, smelters and refineries where high-temperature and corrosive gas handling is required, chemical processing, and any application where the fan must maintain airflow against substantial duct resistance. Where an axial fan would stall against system pressure, a centrifugal unit sustains performance.
For a direct comparison of the two types, see axial flow fan vs centrifugal fan.
Browse the centrifugal fan range.
Roof Fans
Roof fans are mounted through the roof structure to exhaust warm, moist, or contaminated air from the highest point of a facility, where heat and steam naturally accumulate. Variants include hooded exhaust units, filtered supply roof fans, and low-profile options for space-constrained rooflines.
For a full breakdown of available configurations, see industrial roof fans.
Warehousing, food processing, laundry services, manufacturing, and agriculture all use roof fans as the primary heat and moisture exhaust mechanism. Filtered supply roof fans introduce clean filtered air under positive pressure, which is particularly valuable in food processing facilities where incoming air quality is a compliance requirement. Standard exhaust roof fans are the most cost-effective option for facilities where natural supply air infiltration is sufficient.
Browse the roof fan range.
Wall Exhaust Fans
Wall exhaust fans are mounted through external walls to provide horizontal exhaust airflow at any level of the facility, not just at roof height. Side wall and end wall variants suit different building geometries, and low-noise end wall options are available for facilities where noise levels near boundaries or occupied areas are a consideration.
Wall exhaust fans are widely used across food processing, commercial buildings, warehousing, agriculture, laundry services, and manufacturing where roof mounting is impractical or where exhaust points need to be positioned at a specific height relative to heat sources or work zones. For application guidance across industries, see side wall exhaust fan applications.
Browse the wall fan and exhaust fan range.
Air Movement and Circulation Fans
Not every air management problem requires exhausting air out of the building. In many facilities, the air already contains enough heat or is at an acceptable temperature, but it is not reaching workers or is stratifying at ceiling level where it is of no use. Circulation fans solve this by redistributing air within the space rather than replacing it, reducing the load on extraction and heating systems while directly improving worker comfort.
Giant Fans / HVLS
A high-volume, low-speed (HVLS) fan uses a large blade diameter, typically 3 to 7 metres, rotating at very low RPM to move a high column of air across a wide floor area without creating uncomfortable drafts. In summer, this air movement increases evaporative cooling across workers and reduces perceived temperature. In winter, HVLS fans run in reverse or at low forward speed to push stratified warm air from the ceiling back down to floor level, reducing heating system demand by 20 to 30% in high-ceiling facilities. For a detailed breakdown of both applications, see benefits of HVLS giant fans for industrial and commercial spaces.
HVLS fans are the preferred solution for warehousing and logistics, wholesale and hire facilities, large manufacturing bays, agriculture, and any open-plan space with ceilings above 5 metres where moving air uniformly across the floor plate matters. Ultra-low noise operation makes them suitable for facilities with noise-sensitive environments such as distribution centres with open offices adjacent to warehouse space.
Browse the giant fan and HVLS range.
Air Circulators
An air circulator is a wall-mounted or pedestal-mounted fan that generates a focused, high-velocity airstream directed at a specific zone, providing targeted air movement at a scale suited to individual work areas or smaller spaces. Unlike HVLS fans, which manage whole-facility air movement, circulators address spot cooling, localised destratification, and directed airflow in zones where a large fan is not practical or cost-justified. For guidance on selecting between types, see different types of industrial air circulators.
Browse the air circulator range.
Mancoolers
A mancooler is a portable or fixed industrial fan that delivers a high-velocity focused airstream directly to a worker or work area, providing immediate evaporative cooling relief in hot environments. Mancoolers are deployed in construction, mining, foundries, smelters, and any outdoor or semi-enclosed site where ambient temperatures make sustained work without directed airflow a heat stress risk. For a comparison against portable air conditioning alternatives, see mancoolers vs portable industrial air conditioners.
Browse the mancooler range.
Confined Space and Pressure Fans
Confined space ventilation is a category where incorrect fan selection is not a performance issue, it is a worker safety issue. The fan must deliver or remove air to and from inaccessible zones from outside the space, before any worker enters, and in sufficient volume to achieve confirmed safe atmospheric levels. Getting this selection wrong can mean a worker enters an atmosphere that has not been adequately cleared. AS 2865 governs confined space atmospheric testing requirements in Australia, and fan selection must be matched to the space geometry, contaminant type, and required air change volume.
Purging Fans
A purging fan is a purpose-built ventilation device designed to remove hazardous gases, oxygen-deficient atmospheres, or accumulated contaminants from confined spaces by delivering or extracting a full air change through ducting, from outside the space. Variants include portable units for general confined space applications and vat purging fans for food and beverage vessels. For a full technical explanation including positive and negative pressure modes, see what is a purging fan and when do you need one.
Purging fans are standard equipment in oil and gas, mining, construction, smelters and refineries, and food processing facilities with fermentation vessels. Safety note: a timed purge cycle is not a substitute for atmospheric testing. Atmospheric testing must confirm safe levels after purging before any worker entry, regardless of elapsed time.
Browse the purging fan range.
Venturi Air Movers
A venturi air mover uses a compressed air supply to generate a high-velocity jet that induces a secondary airflow many times larger than the driving airstream, creating effective ventilation without an electric motor or electrical connections inside the hazardous space. This makes venturi units the preferred option for confined spaces where flammable or explosive atmospheres may be present and electrical equipment cannot safely be introduced. For a full explanation of the operating principle and applications, see what is a venturi air mover and what can it do for you.
Venturi air movers are used in oil and gas, chemical processing, underground mining, and any confined space entry where the atmosphere cannot be confirmed free of flammable concentrations before ventilation equipment is introduced. Unlike purging fans, venturi units require a compressed air supply rather than electrical power, which is the key operational distinction when selecting between the two for hazardous atmosphere applications.
Browse the venturi air mover range.
Portable Blower Extractors
A portable blower extractor provides flexible supply or extraction ventilation in confined spaces and enclosed work areas where a fixed installation is not possible or the work is temporary. Portable units suit construction, tunnelling, basement works, underground maintenance, and any confined space application where the atmosphere is confirmed non-hazardous and electrical equipment can safely be used. Portable blower extractors are the practical choice alongside purging fans for general non-flammable confined space ventilation, sized to deliver the required m³/h for the space volume and target air change rate.
Filtration Fans
Filtration fans combine air movement with particulate capture, serving facilities where moving air is not sufficient on its own because the air being moved carries contaminants that must be removed rather than redistributed. In food processing, pharmaceutical, and chemical environments, filtration is a regulatory requirement rather than a comfort measure, and fan selection must be matched to the filter media grade and the required clean air delivery rate.
Fume Extractors
A fume extractor captures airborne contaminants at or near the source using a capture hood or nozzle, drawing them through multi-stage filtration before discharging clean air, preventing contamination from reaching the broader facility atmosphere. Fume extractors are the primary compliance tool for welding, fabrication, grinding, and chemical handling operations where source capture is required. For a breakdown of available system types, see what are the different types of fume extraction systems.
Compliance note: the workplace exposure limit for welding fume is 1 mg/m³ over an 8-hour TWA. Facilities relying on ambient dilution ventilation rather than source capture extraction should review their compliance position against this limit.
Browse the fume extractor range.
Filter Fans
A filter fan supplies air through a HEPA, panel, or media filter before introducing it into a space, maintaining positive pressure and a filtered air supply in environments where incoming air quality is controlled for compliance or process reasons. Negative pressure filter fan configurations are used for containment work, preventing contaminated air from escaping a work zone into adjacent clean areas. For an industry-by-industry breakdown of when filter fans are required, see in what industries are filter fans needed.
Filter fans are used in food processing, pharmaceutical manufacturing, electronics assembly, paint and coating environments, and any facility where incoming air must meet a specified cleanliness standard before contacting product, process, or personnel.
Browse the filter fan range.
Air Curtains
An air curtain generates a continuous high-velocity air barrier across a doorway or opening, preventing the uncontrolled mixing of two different air environments without physically obstructing passage. At loading docks, cold room entries, and food processing doors, air curtains maintain internal temperature and air quality by limiting infiltration from the outside or from adjacent zones. For a full explanation of air curtain technology, see what are air curtains, and for the business case across applications, see air curtain benefits.
Browse the air curtain range.
Heating Fans
In Australian winters, large industrial facilities face a specific ventilation challenge: the heating system produces warm air, but without active air movement that warmth pools at the ceiling and never reaches the workers or processes on the floor. Heater fans address this directly by generating and directing heat into the occupied zone. When paired with HVLS fans that push ceiling-level warm air back down, heater fans become part of a complete winter air management system rather than a standalone heat source.
Heater Fans
A heater fan combines a heating element with a high-velocity fan to generate and direct warm air into a specific zone, providing rapid targeted heat delivery in warehouses, workshops, and industrial staging areas. Fanquip’s range runs from 7 kW to 36 kW per unit and is available in wall-mounted and trolley configurations, allowing zone-by-zone sizing matched to a calculated heat load. For sizing methodology, see how to size a heater fan for large industrial spaces, and for a system comparison covering HVAC alternatives, see heater fan vs radiant heater vs HVAC: which is right for your facility.
Heater fans are used across warehousing, manufacturing, mining site facilities, construction welfare areas, agriculture, and wholesale and hire operations during winter. Pairing a heater fan with an HVLS fan in a high-ceiling space reduces the number of heater units required by pushing stratified warm ceiling air back to floor level, improving system efficiency significantly.
Browse the heater fan range.
Specialist Fans
Some industrial processes require a fan designed for a single specific function that does not fit neatly into any of the broader categories above.
Transformer Cooling Fans
A transformer cooling fan maintains safe operating temperature on power transformers by directing continuous airflow across the transformer’s cooling fins or radiator panels, preventing thermal overload and extending transformer service life. Transformer cooling fans are used in power generation, grid substations, mining operations, smelters and refineries, and large manufacturing sites where transformers are integral to production infrastructure. For a detailed explanation of cooling methods and fan selection, see what does a transformer cooling fan do.
Browse the transformer cooling fan range.
How to Choose the Right Industrial Fan for Your Facility
The right fan type follows from the function required, not from size or brand preference.
If the goal is to remove hot air, fumes, dust, or steam from a large space, the answer is an extraction fan matched to the volume and contaminant type. An axial fan suits open, low-resistance environments. A centrifugal fan is required where duct lengths or system resistance are significant.
If the goal is to move air around without exhausting it, an air circulator handles targeted spot movement in smaller zones, while an HVLS fan manages whole-facility air movement in large open-plan spaces with high ceilings. Neither exhausts air from the building, so neither replaces a supply of fresh air but both dramatically improve the distribution of the air that is already there.
If the goal is to ventilate a confined space before worker entry, a purging fan with ducting provides the controlled air change required under AS 2865. Where the atmosphere may contain flammable concentrations before ventilation begins, a venturi air mover is the correct choice because it requires no electrical connection inside the hazardous space.
If the goal is to filter air as well as move it, the choice is between a fume extractor for source capture at a process point, and a filter fan for ambient filtration or positive pressure supply. The distinction is whether contamination is generated at a specific point (fume extractor) or distributed across the environment (filter fan).
If the goal is to heat a large facility in winter and maintain comfortable floor-level temperatures, a heater fan in the 7 to 36 kW range provides the zone heating output, and pairing it with an HVLS fan in the same space pushes stratified warm ceiling air back to floor level, reducing the number of heater units required and cutting energy consumption.
For facilities with multiple requirements across different zones, or where the application involves confined spaces, hazardous atmospheres, or regulatory compliance, Fanquip’s engineering team can assess your site and recommend a configuration across the full product range. Browse accessories and add-ons to complement any system with variable speed drives, anti-vibration isolators, and mounting solutions. Contact Fanquip directly for a site assessment.
Frequently Asked Questions
What is the difference between an axial fan and a centrifugal fan?
An axial fan moves air parallel to its shaft at high volume and low pressure, making it suited to open ventilation with minimal duct resistance. A centrifugal fan spins air outward at right angles to its inlet, generating significantly higher static pressure at the cost of lower volume, making it the correct choice for ducted systems with resistance from ductwork, bends, and filters.
Which fans are used for confined space ventilation?
Purging fans and venturi air movers are the two primary options for confined space ventilation before worker entry. Purging fans use electric motors and ducting to deliver or extract air from outside the space. Venturi air movers use compressed air to generate ventilation without electrical connections, making them the correct choice where flammable atmospheres may be present before the space is cleared.
What does HVLS stand for and where are HVLS fans used?
HVLS stands for High-Volume Low-Speed. HVLS fans use large-diameter blades rotating at very low RPM to move a high column of air across a wide area without creating drafts. They are used primarily in large-span warehouses, logistics facilities, manufacturing halls, and agricultural buildings where uniform air movement across a large floor area is needed for both summer cooling and winter heat destratification.
Do industrial fans filter the air they move?
Standard extraction and circulation fans move air without filtering it. Only fume extractors and filter fans incorporate filtration media into the airstream. Fume extractors capture contaminants at the source through multi-stage filtration. Filter fans supply air through HEPA or panel media before introducing it to the space. If filtration is a compliance requirement for your facility, one of these two types is needed in addition to, or instead of, standard extraction or circulation equipment.
Can fans be used for heating as well as ventilation?
Heater fans combine a heating element with a high-velocity fan to generate and direct warm air into a specific zone. For large facilities with high ceilings, pairing a heater fan with an HVLS fan that pushes stratified warm ceiling air back to floor level significantly improves heating efficiency and reduces the number of heater units required to maintain target temperatures across the occupied zone.