The T-Series fan range is fitted with a Vent-Axia M-Tech motor, developed to improve performance, lower running costs and maintain the T-Series’ rugged reliability. A patented speed control pack is simply plugged in one of 3 positions to provide low, medium or boost speed matching the fan performance to the requirements of the installation. Features: Extract/intake fans in 4 sizes: 6”, 7”, 9” and 12” Patented electronic shutter system ensures quiet trouble free operation To obtain the best from your fan, use the Ecotronic controller Shutter open/fan off mode Low sound levels Easy fit connector Top Socket, standard on all models Designed for single or double glazing up to 32mm thick