Kestrel

Fan ranges

Six ranges

Between them they cover 0.1 to 90 m³/s, static pressures to 12,000 Pa and air temperatures to 550°C. If your duty sits between two ranges, we will tell you which one we would build and why.

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A large industrial centrifugal fan casing painted safety orange on a factory assembly floor, its impeller visible through an open inspection hatch

To 63 m³/s · 8,000 Pa

Centrifugal fans

Backward-curved and forward-curved impellers in welded steel casings, from 0.4 to 63 m³/s against static pressures to 8,000 Pa.

Specification →
A precision-machined aluminium axial fan impeller on a dark steel workbench, aerofoil blades catching the light beside a dial gauge and balancing weights

To 90 m³/s · 2,500 Pa

Axial fans

Cast aluminium aerofoil impellers with adjustable pitch, in short or long cased bifurcated arrangements to 90 m³/s.

Specification →
A welder in a plain leather apron fabricating a heavy curved steel fan casing clamped in a jig, the weld arc lighting the workshop

To 45 m³/s · 1,600 Pa

Smoke extract fans

F300, F400 and F600 rated to EN 12101-3, third-party certified, with the certificate numbers on the nameplate.

Specification →
A slim grey jet fan unit mounted to the soffit of an underground car park, its nozzle pointing along the drive aisle between parked cars

Thrust rated

Jet & impulse fans

Induction ventilation for car parks and tunnels — thrust from 30 to 120 N, reversible, with the CFD model to justify the layout.

Specification →
A rooftop plant deck with rows of galvanised industrial ventilation units and ducting, access walkways and handrails, city skyline beyond

To 12 m³/s · 900 Pa

Roof units

Vertical and horizontal discharge roof extract in galvanised or coated steel, with weathered kerbs and a hinged cowl.

Specification →
A ducted aerodynamic test rig in a fan works, instrumentation cabling running to a monitoring station where an engineer sits with their back to camera

To 40 m³/s · 12,000 Pa

Process & high-temperature fans

Hot gas, abrasive and corrosive duties to 550°C, with shaft cooling, wear liners and materials chosen for the actual gas.

Specification →

Choosing between them

Pressure decides it, not volume

The question we are asked most often is centrifugal or axial, and the answer is almost always decided by the system resistance rather than the volume. Below about 800 Pa an axial fan will do the job in a smaller, lighter, cheaper case. Above about 1,500 Pa a centrifugal will do it at a materially better efficiency, and the difference compounds across a fifteen-year run.

Between those two figures it is genuinely arguable and depends on the space, the noise limit and how the fan has to be got in and out of the building. That is a conversation, not a lookup table.

What we would ask you for: volume, static pressure, air temperature, what is entrained in the air, the noise limit at the nearest sensitive receptor, and the largest thing that will fit through the plant room door. Two of those six and we can usually get started.

How we prove the duty

Accreditation

Certificates held

ISO 9001
Quality management
ISO 14001
Environmental
ISO 45001
Health & safety
EN 12101-3
Smoke extract
ATEX 2014/34/EU
Explosive atmospheres

Next step

Send us the duty and we will send back a curve

Volume, static pressure, air temperature and what is in it. If you only have two of those, ring us and we will work out the rest.

Request a quotation 01632 960 448