Three fan models are available in the Dunham-Bush range of ultra-low energy acoustic extract fans with duties up to 900/l/s.
The eDF model is an inline ducted single fan arrangement ideal for use in small commercial applications where the occupant requires manual control over air flow. The ECO-SPEED controller enables manual variable local speed control and an off position.
The eDF model is an inline ducted twin fan arrangement making it suitable for application where continuous operation is vital. The ECO-TF controller on this model enables duty share and auto change over together with a speed controller allowing for trickle and boost options with speed adjustment. It can be enabled/ disabled from a BMS/VFC time-switch has a fault output signal capability.
The eRTF model is a compact twin roof fan utilising the same controller as the eDF model with all the same control functions. The eRTF fans are available with either bottom square of rear circular spigot inlets, and are manufactured from high quality powder coated galvanised sheet steel.
All models are suitable for commercial applications. Fans in this series are ERP compliant with <0.5W/ls SFP as required in all None-Domestic Building Services Directive 2013 on all parts of the fan curve.
All fans are fitted with acoustic non-hygroscopic foam and non-overloading 100.000 hour long life, low energy EC fans.