Multiflow SMB

Multiflow SMB

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Multiflow SMB

smb main

The Multiflow SMB is a range of square cased mixed flow fans with a unique adjustable pitch mixed flow impeller, ideally suited for installation within ductwork and suitable for extract or supply for a broad range of industrial, commercial and residential applications.

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Learn more about individual features and benefits of our products.

smb spec_box


The Power Plus range of plate mounted axial fans as manufactured by Elta Fans Ltd.

Technical information


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SPP Features and Benefits

Features & Benefits

Aerodynamic appeal

The inherent aerodynamic benefits of good mixed flow impeller design provides marked advantages over axial and centrifugal air performance characteristics.

Quality impeller design.

Aluminium spinnings and pressings in a natural finish, together with steel hubs which are suitably zinc plated and dynamically balanced to Grade G6.3 for maximum efficiency.

Installer friendly simplicity.

All motors are pre-wired to an integral IP55 terminal box so they are ready for customer installation.

Material strength.

Multiflow SMB mixed flow fans have a robust casing design for added strength and durability. Casings are manufactured in pre-galvanised sheet steel which is suitably stiffened, with all motor supports hot dipped galvanised to BS 729 after manufacture.


The unique design of Multiflow SMB fans enables the required performance to be attained from a smaller fan size than is normally achievable with typical conical style, fixed blade mixed flow fans.

Outstanding performance

Mixed flow “non stall” airflow properties and a non overloading absorbed power curve allow a wide range of operating performance to be achieved.

SPP Specifications


The Multiflow SMB range of squared cased mixed flow fans as manufactured by Elta Fans Ltd. 46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK. Tel: +44 (0) 1384 275800 - If you need more information - Contact us.


The all metal casing shall be manufactured using pre-galvanised sheet steel suitably stiffened. Casings shall incorporate Ductmate flange connections at each end. Motor supports shall be of steel sheet construction, hot-dip galvanised to BS EN ISO 1461:2009 after manufacture and shall have an aerodynamic profile.


Motors are to be foot mounted totally enclosed metric type to IP55, with sealed for life bearings, standard industrial paint finish and Class F insulation to EN 60034-5, suitable for operating temperatures up to +50°C. Motors are to be wired via a weatherproofed cable to an IP55 protected terminal enclosure in the casing wall.


Adjustable pitch mixed flow impellers shall be provided with the blade angles set to meet the required duty. The impeller construction shall comprise of aluminium spinnings and pressings in natural finish, together with steel hub assemblies, suitably zinc plated. Assembled impellers are to be dynamically balanced to ISO 14694 Grade G6.3.

Quality Management

Units are to be designed and manufactured with procedures as defined in BS EN ISO 9001:2008. All SMB units are to be tested to ISO 5801:2007 (airside performance) and BS 848 Part 2:1985 (sound performance).

Typoical Applications

Where higher pressure developments are required, such as:

  • Kitchen Canopies
  • Restaurants
  • Lift Motor Rooms
  • General HVAC installations

Technical Information

Dimensional Data


All dimensions are expressed in mm.

Performance & Electrical Data



Sound Data



Accessories & Wiring Data






  • Av Mounts (Rubber)

    Spring AV mounts - zinc plated steel, rubber insert and foot pad

    Read more
  • Flexible Connectors (063-MFB)

    Provides easy flexible connection with any matched ducting

    Read more
  • Silencers (068-MFB)

    Infill is glass tissue faced high density mineral wool

    Read more

Accessories & Wiring Data