The Vent-Axia CENTRIF DUO PLUS P Extractor Fan has an override pull cord and is a single speed kitchen fan. Choice of two speeds for boost, set at installation. Centrif Duo Plus is designed to provide extraction levels that comply with Building Regulation (Document F) requirements, with special humidity sensing variants for local authority use. The Centrif Duo Plus is for kitchens and utility rooms and large bathrooms. Surface mounting directly into standard 100mm diameter ducting, through the wall or ceiling installation. The Centrif Duo Plus has a 100mm circular spigot. The Flush mounting kit enables the spigot to be converted to a side outlet. The spigot also encloses a built-in, spring operated back draught shutter. The Centrif Duo Plus Range can be wall mounted using a telescopic wall fitting kit available as an accessory (requires a 115mm diameter hole). For ceiling applications the range is ducted either through a soffit outlet or roof cowl assembly. There is convenient access for wiring which can be surface or recessed.