Our team of experts can support you by designing the right ventilation or extraction setup for your project, helping you choose the correct fan sizes, ducting, and control options to suit your hazard and airflow requirements.

Yes, we have ATEX-certified centrifugal fans, such as the VENTEX® Centrifugal Fan 300M ATEX

Our centrifugal fans are ideal for:

• Extracting hot or volatile fumes (e.g. paint, solvents)
• Dust extraction and filtration
• Long-distance ventilation such as inside tunnels or basements
• Providing fresh air to confined space work areas

Yes, several of our fans are portable, including VENTEX® Centrifugal Fan 200P, and also VENTEX® Centrifugal Fan 300M which has wheels and a handle. These fans are easy to move around a project as work progresses.

Our VENTEX® Centrifugal Fan 800S industrial centrifugal fan can move up to 52,200 m³/ hr of free air

Because of the design of the centrifugal fan, the motor is placed outside the airflow path, so air (which might be hot or abrasive) doesn’t pass over the motor. This makes them safer for extracting hot fumes, flammable gases, or dust.

This is a very broad question and the answer depends on what type of environment you are working in, the size of the work space, the types of activities you are undertaking, and what contaminants you are dealing with (eg. dust, fumes, DEEEs, gases etc.).

However, generally speaking there are two ventilation methods for controlling airborne contaminants on site; supply and/ or extraction. Positive pressure ventilation systems can be used to supply a constant flow of clean air into a work space which will displace any contaminated air. Alternatively, if you have a specific activity that is generating the airborne contaminants, a local exhaust ventilation system (portable LEV) can be used to extract and filter the contaminated air out of the work space. Quite often, a combination of the two methods will work well; use an appropriate extraction ventilation system with capture hood to capture and extract the contaminants at the source of the activity, then force in clean air to dilute the residual contaminants in the air.

Learn more about best practice ventilation

According to Section 3 of the government guidance, “Transmission characteristics and principles of infection prevention and control” by Public Health England:

“A single air change is estimated to remove 63% of airborne contaminants. After five air changes, less than 1% of airborne contamination is thought to remain.”

The exact number of air changes required depends on the environment and the activities being carried out; higher-risk situations demand more frequent air changes. In particularly sensitive settings, Public Health England recommends 6 -12 air changes per hour to effectively control airborne contaminants.

Typically, Centrifugal fans are the best fans to use for basement ventilation, because they are quiet, compact and perform well even when using long duct runs or duct runs with multiple bends (as is often required to be the case), however, each basement project is unique with different activities, access points, depth and volume of excavation etc, so therefore requires a tailored approach.

For railway tunnels, centrifugal fans are often the preferred option as they can be situated outside the tunnel, ensuring that they do not get in the way or block access for vehicles and machinery. Centrifugal fans also maintain high pressure over long duct runs, so they can deliver clean air deep into long tunnels.

Axial fans are better for moving high volumes of air over short distances, whereas centrifugal fans are better at maintaining high pressure over long duct runs. Despite a lower flow rate, centrifugal fans create a steadier flow, resulting in a significantly higher static efficiency. Centrifugal fans are also typically quieter than axial fans, and even with attenuators fitted are more compact. The best fan to use therefore depends on the requirements of the project.

A centrifugal fan has its motor positioned to the side of the fan casing and uses a curved, snail-shaped impeller to move air. This design typically produces higher pressure but lower airflow compared with an axial fan of the same motor size. An axial fan, by contrast, has its motor located in the centre of the casing, with air passing directly around it to achieve higher volume flow at lower pressure.