Free whitepaper overview: Fan specifications in fume extraction systems

Fume extraction systems are engineered to capture and remove harmful gases and vapours at the source, directing them away from personnel and sensitive research environments. These systems typically consist of fume capture hoods, ductwork, filtration units, and most critically, industrial fans that generate the necessary airflow and pressure differentials.

For those of you working in these applications, you’ll know that a well-specified fan ensures the seamless removal of hazardous substances, maintaining air quality standards and regulatory compliance. In the free whitepaper: The ultimate guide to fan specifications in fume extraction systems, Axair Fans uncovers the intricacies of what to look out for when researching, specifying and procuring industrial fume fans.

Firstly, the whitepaper covers one of the key factors in effective fume extraction, understanding the relationship between airflow and pressure. The static pressure within a ventilation system must be carefully calibrated to overcome resistance from ductwork, filters, and other system components. Velocity pressure, which influences the speed of air movement, also plays a vital role in optimising duct sizing and system efficiency. Improper selection due to a misunderstanding can result in excessive turbulence, noise pollution, and energy wastage, or conversely, inadequate extraction that fails to maintain a safe working environment.

Secondly, the paper provides valuable information for those of you in facilities handling explosive or flammable substances where compliance with ATEX regulations is compulsory. ATEX-certified fans are specifically designed to operate safely in potentially explosive atmospheres, mitigating self-ignition risks associated with static discharge. These fans incorporate specialised materials, such as carbon-loaded polypropylene in corrosion resistant fans, to prevent ignition hazards. Given the stringent safety standards in pharmaceutical and life sciences sectors, selecting ATEX-compliant equipment is non-negotiable, yet based on the feedback from those in the market, something that the industry struggles to find competent, experts in. Get the know-how and be an informed customer to ensure you get what you need and cover your own back.

Another crucial aspect of fan selection is material compatibility. Corrosive environments, such as those found in chemical processing laboratories, demand fans constructed from resistant materials like polypropylene or stainless steel. Polypropylene offers strong resistance to non-oxidising acids and bases, making it an ideal choice for many laboratory applications.

Beyond safety and compliance, energy efficiency is an increasingly important consideration. Labs and pharma facilities are among the highest energy consumers due to their ventilation demands. The integration of energy-efficient fan technologies, such as electronically commutated (EC) motors and variable speed drives, can lead to significant reductions in energy consumption and carbon emissions. Systems designed with energy optimisation in mind contribute to sustainability initiatives, aligning with BREEAM standards and supporting corporate net-zero targets.

The paper covers common pitfall in fume extraction design such as over-specification. While the intention behind selecting larger, more powerful fans may be to ensure performance under all conditions, this approach can lead to unnecessary capital expenditure, excessive energy use, and operational inefficiencies. A precise assessment of airflow and pressure requirements, alongside collaboration with technical specialists, ensures an optimally designed system that balances performance with cost-effectiveness. Under-specified fans struggle to maintain adequate airflow, leading to increased wear and tear, frequent maintenance, and potential compliance failures. Conversely, oversized fans may create excessive noise and vibration, contributing to an uncomfortable working environment. Engineers and facility managers who work closely with experienced fan suppliers, trusting their expertise and being open about the system requirements, ensure that the system is designed to perform reliably and efficiently within the intended application.

For facilities seeking to upgrade existing fume extraction systems, retrofitting with high-efficiency fans presents a cost-effective solution. Modern EC fan technology, for instance, enables simple replacements while significantly reducing energy consumption. In the pharmaceutical and life sciences sectors, where compliance and efficiency are of utmost importance, upgrading to advanced fan solutions offers long-term operational benefits.

A recent project Axair Fans finalised at the National Oceanography Centre in Southampton, illustrates the impact of selecting the right fume extraction fans. The retrofit project involved integrating energy efficient EC chemically resistant polypropylene centrifugal fans to provide safe and efficient air movement across multiple laboratory spaces. By working closely with technical specialists, the team avoided many pitfalls written in the initial specification, and the facility ensured compliance with ventilation requirements while achieving notable energy savings and improved system reliability.

Ultimately, the importance of correct fan selection cannot be overstated. Laboratories and pharmaceutical facilities must prioritise not only regulatory compliance but also operational efficiency and environmental responsibility. Engaging with * that meets safety requirements, enhances system performance, and supports sustainability goals. With the right fume extraction strategy in place, organisations can create safer, more efficient, and compliant working environments that protect both people and products.

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