SLPT- Slimpak Twin In-Line Centrifugal Fans



The Slimpak range of streamline twin fan units, which have been designed to allow the unit to be installed as a Run & Standby extract fan or alternatively running both fans simultaneously for optimum performance, offering total flexibility.

Slimpak housings are manufactured from prime quality galvanised sheet steel with circular inlet and outlet spigot connections. To ensure minimum noise levels the units casing is treated with an acoustic lining, Class O rated which offers self extinguishing, zero burn rate, resists ignition and no toxic fume properties.

Each unit incorporates a back draught shutter to prevent air recirculation via the standby fan and to ensure easy access for cleaning and maintenance purposes a full sized access panel is provided to both fans.

Designed and developed to provide one of the most powerful and compact twins in the market, available in three sizes 200, 250 and 315mm dia, with extract performance ranging from 0.116m³/s up to 0.400m³/s (417m³/h to 1,440m³/h), with pressure characteristics of up 550Pa.


At the heart of the range is a proven 230V/1/50Hz external rotor motor and backward curved impeller assembly. The assembly is dynamically balanced to ISO 1940. Motors are rated to IP44 according to BS EN 60529. Ball bearings are greased for life and allow the fan to run at any angle. Insulation is Class 'B' (from -15°C to +40°C).

All Acoustic fans are suitable for speed control, an Auto Transformer is recommended to ensure minimum noise levels during speed control so eliminating any possibility of motor harmonic noise.

Performance and Sound

Tested to BS 848 Parts 1 & 2. Published dB(A) figures are free field sound pressure levels at 3m with spherical propagation at a reference level of 2 x 10-5 Pa (20 micro-Pascal). The inlet, outlet and breakout sound power level spectra figures are dB with a reference of 10-12 Watts (1 pico-watt).

Quality Assurance

Design and manufacture shall be in accordance with BS EN ISO 9001:1994.


Trackmaster Twin Fan Controller (ITC)
The ITC model provides automatic changeover on fan failure as well as enabling a manual selection of either fan for duty sharing or test purposes. (BMS compatible via volt free contacts). This controller must have a permanent live supply. Any On/Off switching must be via the sensor connections S1 and SG terminals.
Stock Ref No: 10314200

Trackmaster Twin Fan Controller (ITC-DS)
The ITC-DS model (Duty sharing). Incorporates a timing mechanism which operates alternate fans on 12 or 24 hour intervals, thus ensuring the extended life of the fan bearings. The controller also provides automatic changeover on fan failure along with the facility for manual selection of either fan. (BMS compatible via volt free contacts). This controller must have a permanent live supply. Any On/Off switching must be via the sensor connections S1 and SG terminals
Stock Ref No: 10314210

RSC - Remote Setback Control
The RSC multi-speed control system offers 2 speed fan versatility eg. Energy Management for night-time setback. Can be used in conjunction with Vent-Axia ITC, ITC-DS controllers using 5 step auto-transformer speed controllers for speed selection. Uses 24V output from ITC controller. Dimensions:86mm x 178mm x 100mm (Width x Height x Depth)
Stock Ref No: 10314230A

Remote Visual Indicator (RVC)
Wired in conjunction with either an ITC or ITC-DS controller the RVC can be located up to 100m away using low cost ELV wiring. The compact, single gang RVC ELV (Extra Low Voltage) remote visual controller indicates status of Fan 1 and Fan 2 with status/warning lights. Push button allows Fan 1 and Fan 2 with standby (Off) to be selected.
Stock Ref No: 10314220


Duct Dia. Stock Ref. No. L W H ØD X Weight Kg
200 SLPT200 760 490 235 200 205 20
250 SLPT250 865 590 285 250 233 32
315 SLPT315 955 650 350 315 240 39


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