Twin Fans


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Acoustic twin cabinet fans manufactured from galvanised steel sheet and internally lined with 25mm thickness of fireproof acoustic insulation (M0). All models incorporate two S&P ECOWATT backward curved centrifugal fans, brushless EC motors with thermal overload protection. Integral control unit providing automated run and standby by tacho/low current sensing, duty-sharing adjustable from 3 to 24 hours, (in 3 hour steps) and BMS output/remote fault indication.

Remote On/Off via volt-free contact and/or 230V signal. Variable Speed Control, manually via an optional secondary S&P REB ECOWATT or REB-CVF controller, or automated via a 0-10V signal from an external source.

Installer-defined fixed speed control either continuous or on-demand (triggered by an external switch), or one, two or three speeds defined during installation to provide a minimum/middle/maximum speed ventilation system, the middle and maximum speeds being selected by an external switch/sensor (either volt-free and/or 230V).
Integral over-run timer.
Electrical supply: Single phase 230V-50Hz
Working temperature from -20ºC to +40ºC


  • 11-MELLIZObdp506

    Digital display of running, stopped and/or fault condition.

  • 11-MELLIZObdp487

    Pitched lid allows for external siting. Can be mounted horizontally or vertically (airflow rising only).
    Drop-rods can be supplied as an accessory for suspending the unit from the ceiling.

  • 11-MELLIZObdp481

    Low noise level:
    Internally lined with 25mm thickness of fireproof acoustic insulation (M0).
    Silencer can be supplied as an accessory.

  • 11-MELLIZObdp531

    Provision to operate a system damper actuator (can be supplied as an accessory).

  • pdf_ins1 Ins_MELLIZO 3.00Mb
  • pdf_serie EN_MELLIZO 2.54Mb

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