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Gamma EC Downflow – CEEC31D

Gamma EC Downflow Fantech EcoRange Energy Efficient Fans

Performance Curve - CEEC31D


The Gamma EC Series of centrifugal roof mounted exhaust fans incorporates the latest state of the art, energy saving EC motor technology. They feature integrated infinitely variable speed control and eliminate the need for external VSDs, current overloads and motor phase protection.
The Gamma EC Series is a simple "plug and play" system which means installers do not need to have specialised control programing knowledge.
Matching sensors can easily be connected to monitor the ambient conditions in a space and provide real time feedback to the fan. The fan's on-board microprocessor can adjust the speed and therefore modulate the ventilation rate to match the specific requirements of the area.
Models come in downflow or vertical discharge configurations and are available in 250, 315, 355, 450, 560 and 630mm fan sizes.
  • EC motor features reverse polarity protection, locked rotor protection and soft start.
  • No additional protection such as contactors are required.
  • All models supplied standard with 0-10V control input.
  • Diameter sizes 315mm and above can be pre-configured to suit specific sensors and specific applications.
  • A full range of sensors are available including differential pressure, humidity, temperature, air velocity and pollutant.
  • Can be run as an independent ventilation source or integrated into most building management systems.
  • Robust and lightweight construction.
  • Compact, low profile design.
  • Designed for downflow exhaust applications.
  • Can be mounted at angles up to 30°.
  • Supply air units are available
  • Construction
    Cowls are UV-stabilised plastic.
    Impellers are backward-curved centrifugal design and are of high performance composite material.
    Steel components have a corrosion resistant finish.
    Bird-mesh guards are fitted as standard.
    Type - electronic commutated (EC) motor.
    Electricity supply
    - 200-277V single-phase, 50/60Hz for 250 to 450mm sizes.
    - 380-480V three-phase, 50/60Hz for 560 and 630mm sizes.
    Bearings - sealed-for-life, ball.
    Integrated EC-Controller providing infinite speed control.
    Internal Thermal Protection
    Integral thermal overload protection is supplied as standard.
    Air flow tests to ISO 5801:2007.
    Noise tests to ISO 3744:2010.
    Special Note
    Diameter sizes from 315mm and above can be pre-configured to suit specific sensors and specific applications. Please advise Fantech of these parameters at the time of order.
    EC motors should be directly connected to their appropriate AC supply. EC motors should not be regularly power cycled.

    Suggested Specification

    The roof ventilators shall be of the Gamma EC Series downflow exhaust type as designed and manufactured by Fantech Pty Ltd and be of the model numbers shown on the schedule/drawings.
    Impellers shall be made from high performance composite material. They shall be backward-curved centrifugal design and driven by EC external rotor motors with integrated EC Controller and integral thermal overload protection. Diameter sizes from 315mm and above shall be pre-configured to suit the selected sensors and the required applications.
    The cowls shall be of the downflow exhaust design and manufactured from UV-stabilised plastic. Steel components shall be corrosion protected.
    All models shall be fully tested as a complete assembled unit to ISO5801:2007 for air flow and ISO 3744:2010 for noise.

    Technical Data - CEEC31D

    Speed [rps]Avg. dBA @ 3mkWatts (Input)Amps Max.°C Approx. Weight [kg]

    Sound Data

    Type631252505001K 2K4K8K
    Inlet7073 857975 736872



    *All dimensions in mm, unless otherwise stated


    Elta Group