Essentials Slim 4" White Concealed Axial Extractor FanInstalling an effective ventilation system is essential if you want to prevent damp and mould in the bathroom. Our new Essentials collection of sleek, modern and stylish extractor fans adds functional appeal to the overall bathroom. The Essentials extractor fan is a slimline, flush mounted fan with an extra quiet decibel level of only 30dB(A) at 3m which is over 50% quieter in comparison to standard 4" (100mm) domestic fans.