- 10 standard sizes from 200mm to 710mm.
- Air volume flow rates up to 3.9 m³/s (AC) / 3.84 m³/s (EC).
- Static pressures up to 1280 Pa (AC) / 1300 Pa (EC).
- Suitable for operating temperatures up to +60°C.
- Extensive range of stock available.
The Twinflow STDR...EC incorporates the BAT (Best Available Technology) Vpro backward curved impeller, with three dimensional profiled blades powered by the ultra reliable Ziehl-Abegg EC (electronically commutated) external rotor motor. The range of twin roof fans are suitable for external mounting, manufactured in Aluzinc with a natural finish.
Features & Benefits
This robust and durable unit has a casing manufactured from natural finish Aluzinc, with a louvred air discharge which provides protection against ingress from the elements and is self draining.
Ease of installation
All models are designed for direct connection to standard diameter flexible or rigid circular ducting with long spigots with EPDM rubber U shaped seals for ease of connection.
High efficiency low tonal noise backward curved centrifugal impellers are directly driven by an AC or EC external rotor motor, designed to be non-overloading and provide high performance characteristics.
All units are designed and manufactured with procedures as defined in BS EN ISO 9001:2008
Ideal for external roof mounting applications where space is a premium.
Full Accessory Range
Speed controllers, fast clamps, silencers, flexible connectors and auto-changeover panels.
Each STDR has a 12 month warranty
The Twinflow STDR range of direct drive Twin 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 unit casing shall be manufactured from 1.2mm thick natural finish Aluzinc. The casing shall be designed so as to minimise vibration and shall incorporate a louvered air discharge guarded against bird ingress. Drain points shall also be provided.
Each casing provides an inlet spigot to suit standard circular ducting. EPDM (Ethylene Propylene) rubber U shaped seals (being ozone and UV stable) are used to ensure a good seal back to the duct that is to be attached. Top access panels shall be provided for ease of servicing.
High efficiency low tonal noise backward curved centrifugal impeller, dynamically balanced to ISO 14694 Grade G6.3 and directly driven by the motor to provide a smooth airflow through the unit.
The Twin range of units may have either an EC or AC external rotor motor fitted as standard. The motor contains sealed for life bearings. Thermal Class of motors to THCL 130 or 155 dependent on size.
Manufactured by Ziehl-Abegg providing increased reliability. All motors are suitable for use in ambient air conditions up to +60°C.
All units in the Elta range are designed and manufactured to procedures as defined in BS EN ISO 9001:2008. They are also tested in accordance with BS848 Part 2 1985 (sound performance) and ISO 5801:2007 (airside performance).
- Industrial Building
- Hotels and Shopping Malls
All dimensions are shown in mm.
Performance & Electrical data
Overall static efficiency, r/min and FMEG values are as per ISO 12759 installation category C. A Variable Speed Drive is integrated in this fan.
*At 2V the average spherical free-field sound pressure levels cannot be accurately measured above the background level in our conventional laboratory facilities. When correctly installed the fan will be inaudible. (less than 20dBA)
Accessories & Wiring Data
Fast Clamps (018)
For quick connection of spigotted fans to circular duct or accessoriesRead more
Pre-galvanised sheet steel with perforated steel liningRead more
Flexible Connectors (018)Read more
Auto Changeover Controllers
The control panel features a 2 position Fan 1 / Fan 2 rocker switch for fan selection.Read more
Speed Reference Potentiometer
Speed reference potentiometerRead more
Accessories & Wiring Data