Compact in-line axial centrifugal fan, extremely silent, made of plastic material, for installation in false ceilings or in small spaces, in any position. With acoustic elements (perforated structure to direct the sound waves, and internal insulation in sound-absorbing material which attenuates the level of radiated noise), floating engine system mounted on elastic silent-blocks patented by S&P, inlets with flexible gasket to absorb vibrations, 360° adjustable terminal box, 230V-50Hz, 2-speed motor, adjustable by voltage variation, IP44, Class B, ball bearings lubricated for life and thermal protection. It is equipped with an adjustable timer from 1 to 30 minutes. Model TD 160/100 N, Soler&Palau brand.