Silavent GTF100-HBS is a 100mm wall fitting humidistat fan with an integral timer and backdraught shutter, and is ideally suited for use in small bathrooms and WCs. (Recommended on duct runs up to 1.5 meters) Stylishly designed to discreetly complement modern interior design schemes, the NEW Silavent Sapphire intermittent extract fans offer exceptionally high levels of energy efficient performance and operate very quietly; ensuring homeowners are not disturbed whilst maintaining effective levels of ventilation. Silavent fans have a superb reputation for reliability and ease of installation. They meet 2010 Building Regulation requirements, to significantly reduce the build-up of condensation and mold. This Silavent GTF100-HBS is wall or ceiling mountable. Features: Very Low Energy Usage Fan Quiet operation Facia options available to fit interior design scheme (Not included) Technical: Dimensions: 150 x 150 x 37mm. Spigot dia.: 99mm. Max Extract Volume: 23 (l/s) Max