Plug Fans
Compact, efficient, and built for demanding environments – our plug fans deliver powerful, reliable airflow across a wide range of industrial and air handling applications.
High-Efficiency Air Movement - From 250mm to 1800mm
At Woodcock & Wilson, we specialise in delivering high-performance plug fans engineered for reliability, flexibility, and energy efficiency. With impeller sizes ranging from 250mm to 1800mm, our plug fans are ideal for a wide variety of air handling and industrial applications – including hazardous zones requiring certified safety compliance.
Key Features of Our Plug Fans
Our plug fans are designed with performance, flexibility, and reliability in mind. Available in a wide range of sizes with impeller diameters from 250mm to 1800mm, they offer high efficiency through backward-curved or airfoil impeller options that deliver optimal airflow and reduced noise. With a scroll-free design, they allow for flexible mounting directly into a plenum or duct wall, enabling custom discharge directions to suit complex installations.
Their low-maintenance design features fewer components for straightforward servicing, while smooth airflow ensures quiet operation. Optimised for variable frequency drive (VFD) control, they deliver energy-efficient performance at varying speeds. Built to withstand tough industrial environments, our plug fans are Ex certified for safe use in hazardous zones.
Download our Plug Fan Spec Sheet
A plug fan, sometimes referred to as a plenum fan, is a type of centrifugal fan mounted directly into an air plenum without a full scroll casing. This design allows for:
Easy integration into air handling units (AHUs) and industrial ventilation systems.
Flexible discharge configurations to suit compact or complex duct arrangements.
Uniform air distribution ideal for cleanroom environments and HVAC systems.
Plug fans are most often used where space is limited or where even airflow distribution is critical.
At Woodcock & Wilson, safety is our top priority and our commitment to it shines through our independently certified Ex plug fans. With over 50 years of experience in designing explosion-protected fans, we offer advanced solutions for hazardous area ventilation.
Our plug fans are engineered specifically for air handling units (AHUs) and industrial environments where flammable gases, vapours, or dust may be present. These units deliver uncompromising performance while meeting the most stringent international safety standards.
- IECEx Certified – Independent certification for international use in explosive atmospheres
- ATEX Certified – Fully compliant with EU Directive 2014/34/EU
- UKEX Certified – Approved for use within the United Kingdom
At Woodcock & Wilson, we don’t just meet the minimum – we go further. We are now able to offer independently triple-certified IECEx, ATEX & UKEX equipment, ensuring global hazardous area protection across all industries.
Our plug fans are manufactured using high-quality materials selected to match the demands of your operating environment. We offer a wide range of construction options to ensure durability, corrosion resistance, and performance consistency in even the harshest conditions.
Standard and optional materials include:
- Carbon Steel – Durable and cost-effective, suitable for most industrial applications
- Stainless Steel (304, 316) – Ideal for hygienic, corrosive, or moisture-laden environments such as food processing, pharmaceuticals, marine & oil & gas applications
- Hot-Dip Galvanised Steel – For enhanced corrosion protection in outdoor or semi-aggressive environments
- Special Coatings and Finishes – Epoxy, polyurethane, for added resistance to chemicals.
- Custom materials or finishes can be supplied on request to meet specific industry or project standards, including offshore, chemical, or cleanroom applications.
Whether you're operating in Europe, the Middle East, Asia, or beyond, our Ex-rated plug fans provide you with assured protection, legal compliance, and peace of mind.
Bespoke Designs - Engineered for Your Application
Every application is different – and so are your requirements. That’s why Woodcock & Wilson offers fully bespoke plug fan solutions, tailored to suit your exact specifications.
Whether you need a unique mounting arrangement, specific airflow characteristics, specialist coatings, or integration with existing control systems, our in-house engineering team will work closely with you from concept to commissioning.
We regularly deliver:
- Custom-built casings and mounting plates
- Specialised materials for corrosive or hygienic environments
- vibration control options
- Adaptations for restricted or unusual space requirements
- No two projects are the same – and neither are our fans.
