Domestic ventilation TD-SILENT

* Sound pressure level, radiated at 3 metres in free field, with rigid ducts on inlet and outlet. They incorporate a timer adjustable between 1 and 30 minutes. They have a 1- or 3-speed motor, depending on model, non-adjustable. The 3-speed models can be timed only at high speed. Low-profile in-line mixed-flow fans, made of plastic, with acoustic elements (perforated internal structure that directs sound waves, and sound-absorbing internal insulation that dampens radiated noise, motor body removable without touching the ducts, rubber seals on supply and discharge to absorb vibrations, external terminal box rotatable 360º, IP44, 230V-50Hz motor, 2 or 3 speeds depending on model, speed-controllable by voltage variation, Class B, permanently lubricated ball bearings, capacitor and thermal protector.