The Intervent NVF100T 100mm (4") bathroom/toilet extractor fan by Manrose has an integrated adjustable timer. Suitable for use in bathrooms & toilets. It has pre oiled bearings for long and maintenance-free life. Timer Model Wall/Ceiling Mountable Ventilation Extracts upto 85m3 per hour (23 litres per second) Suitable for a standard 4" ducting Wall/ceiling fixing through 4" Ø flexible or rigid pipes or Manrose low profile, flat channel ducting systems. Single phase consuming 14w, 220-240V - AC.