National Ventilation MON S100HT Monsoon 'Silence' Extractor Fan 4 Inch / 100mm (Humidistat Timer Model)

Low noise as low as 25 dB(A) Specific fan power as low as 0.27 W/L/S 100 & 125mm IP45 (as long as RCD is present) , 150mm IPX4 This fan can be ducted 6-10 metres due to its mix-flow impeller Long life ball bearing motors, service life 40,000 hours Back draught shutter as standard Rubber anti-vibration mounts are designed for motor vibration absorption and noise insulation Specially designed air flow vanes reduce air turbulence, boost air pressure and reduce noise levels Complete with backdraught shutters to prevent back flow and heat loss, Manufacturer: National Ventiation