Twin Fans for Duct Installation - Extra Quiet TFDA
The Helios Twin duct fans have been specifically designed for continuous ventilation in commercial buildings with internal toilets or toilets that have no opening. For noise sensitive applications the acoustically lined units (TFDA) provide the ideal solution. All units in the range have two direct drive centrifugal fans with an individual back draught shutter & separate electrical connections to the terminal, ensuring 100% standby. Supplied with circular spigot connection. A changeover panel (accessory ACSW 2) will be required to proved the automatic changeover in the event of fan failure using current sensing or airflow switch, with visual and audible alarm.