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Gamma Supply Series – CD354S

Gamma Supply Series

Performance Curve - CD354S


The Gamma Series of centrifugal supply air roof units have been designed for use in free intake and ducted installations.
These compact and low profile units are ideal for supplying fresh air to an air handling unit or to an air conditioning system in commercial buildings.
They are available in 8 sizes extending from 315 to 710mm diameter.
  • Corrosion-proof, robust construction.
  • Choice of speeds available.
  • Ideal for ducted installations.
  • Fitted bird mesh prevents debris and birds entering building and interrupting motor operation.
  • High performance backward-curved centrifugal impellers fitted.
  • Can be mounted at angles up to 30°.
  • Some 3-phase motors are 2-speed star/delta design as standard.
  • Speed-controllable using electronic or auto-transformer controllers.
  • Construction
    Cowls are of UV-stabilised plastic.
    Steel components have a corrosion resistant finish.
    Backward-curved centrifugal impellers.
    Bird-mesh guards are fitted as standard.
    Shutters cannot be fitted.
    Type - external rotor, squirrel cage induction motors
    Electricity supply - 230V, single and 415V, 3-phase, 50Hz
    Bearings - sealed-for-life, ball
    Speed-controllable using electronic or auto-transformer controllers
    Some three-phase units are fitted with 2-speed star/delta design motors
    Internal Thermal Protection
    All motors are fitted with Internal Thermal Contacts as standard.
    Air flow tests to BS848:Part 1 1980
    Noise tests to BS848:Part 2 1985

    Suggested Specification

    The roof ventilators shall be of the Gamma Series supply air type as designed and manufactured by Fantech Pty Ltd.
    Impellers shall be backward-curved centrifugal design and driven by speed-controllable external rotor motors with integral thermal protection.
    The cowls shall be manufactured from UV-stabilised plastic. Steel components to be corrosion protected. All models shall be fully tested as a complete assembled unit to BS848:Part 1, 1980 for air flow and BS848:Part 2, 1985 for noise.

    Technical Data - CD354S

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

    Sound Data

    Type631252505001K 2K4K8K
    Inlet7977 737061 636252



    *All dimensions in mm, unless otherwise stated

    Wiring Diagram

    Diagram shown is for single-speed only.
    For 2-speed and special motors, contact Fantech for details.


    Elta Group