New box fan features high-efficiency motors
21 March 2011
Fläkt Woods offers a new box fan range which incorporates energy efficient motors. The product delivers performance in line with current Part L building regulations, meeting the drive for tighter efficiencies, as well as providing ventilation on demand. The new EC TwinBox has a small footprint and features Fläkt's ‘2nd generation’ intelligent fan controller, which has a simplified interface for easier integration.
The New EC TwinBox product delivers air volumes up to 1.7 m3/s, against static pressures of up to 870 Pa. By incorporating EC motor technology, energy usage is minimised, which means that specific fan powers are low. Motors feature a soft start function, which reduces starting currents as well as mechanical stresses, helping to make this product more reliable and extending its lifespan. Associated cabling and control gear costs are also reduced.
The flexible control strategy, which is an integral part of the intelligent fan controller, makes it easy to customise the product to suit either variable or constant pressure systems. The processor at the heart of the intelligent fan controller is designed to respond to input signals received from a range of sensors, which include PIR, pressure, air quality, temperature and humidity sensors, which can be used to vary the fan extract rate to precisely match the demand.
All sensors are supplied with a 10m length of cable attached, which can be wired and terminated on site, into a connection plug, which is fitted inside the intelligent fan control unit (ICU). This revised connection strategy is designed to make on-site installation of cabling more straight-forward, while standardised connection logic makes cable connection to the ICU plug, easy.
As no interconnecting wiring is required between sensors and their associated valves, or from dampers (at extraction points) back to the fan, installation is simple. In addition, labour costs are reduced when compared to conventional systems.
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