Fans – Ventilator – DerbyA compact, efficient all in one ducted ventilator complete with non return damper and 90 degree takeoff for easy installations in tight areas. Features: Low Profile 90 Degree takeoff for limited access low roof cavity use. Non return damper prevents backflow of air. Plug in 1. 3 metre 240 volt power cord for ease of fitment. Low noise 42 Decibels @ 1 metre gives unobtrusive everyday use. Face plate removes for easy cleaning. Low profile flush fit to