Application Guide
General ventilation and extraction
Fire safety & life systems
Catering Education: schools/universities
Healthcare
Industrial
Leisure: Venues/stadiums
Offices
Retail: malls/supermarkets
Residential: hotels/apartments
Stairwell pressurization Smoke extract (inc loading bays)
Toilet extract
Kitchen extract
Demand control ventilation (fan controls)
Cooling and refrigeration
Electro-mechanical cooling Environmental control - crop storage
Petrochemical process ventilation
Emergency ventilation options up to 400°C/2 hours
Pressure testing

Sizes
31JM - (315mm) to 100JM - (1000mm).
Other sizes are available on request.

Fan Performance
All fans are tested to the latest inter nationally recognized standard IS05801 Part 1, installation
category D for aerodynamic performance and BS848 Part 2 (1985) for acoustic performance.
Coupled with a wide range of diameters, the adjustable pitch Aerofoil impeller gives the exact
performance required, with a non overloading fan characteristic.

Impellers
A unique high efficiency aerofoil section blade with a purposely smoothed hub and clamp
plate for adjustable pitch angle availability.
The Fläkt Woods impellers are all high pressure die cast to offer thin aerofoil sections for low
generation of noise. Every cast aluminum component is X-r ay examined using Real Time
Radiography inspection prior to assembly. The maximum pitch angles shown allow for speed
control by frequency inverter.

Motors
Fläkt Woods H.T. Series fans utilize a totally enclosed squirrel cage motor .
The grades of motor insulation have been selected to meet the specific requirements for each
of the H.T. Categories. These motors are suitable for inverter speed control down to 20% of
full speed.
Electrical Supply
400V / 50Hz / 3 φ
Temperature Range
Fans are tested in compliance with high temperature test standard
directive 89/106/EEC to EN 12101-3, and are fully CE mar ked
accordingly.
Fläkt Woods H.T. Series fan motors are sized to run the fans
continuously at normal ambient temperatures (-40°C to 50°C), as w ell
as operating at their emergency high temperature category.
(All motors are not suitable for starting at temperatures lower
than -20°C.).
Most Standard 3φ fans can be offered for a one off emergency operation at 200°C for 2 hours.
Note: During emergency use the inverter should be overridden and the fan run at full speed.

Casings
JM HT Aerofoil fans are available in long cased form, complete with an externally mounted
pre-wired electrical terminal box. Casings are spun from sheet steel with integral pre-drilled
and radiused inlet flanges. The galvanised finish gives a high resistance to corrosion and is
ideal for external as well as internal use.

Accessories
Silencers, Mounting feet, Spring type vibration isolators, Matching flanges, Flexible
connectors, Air operated non return dampers, Guards, Bellmouth inlets.