The Silent Fans has ranked up as the most ultra quiet fan around. It has been awarded the Quiet Mark by the Noise Abatement Society. The elastic blocks help to achieve the outstanding ultra quiet sound quality. They are fitted with the motor and absorb the noise and vibration creating very little noise. Additionally, the motors are equipped with 30,000 hours sealed for life bearings. This unique fan comes with an adjustable timer allowing the fan to operate for a set time after disconnection - shut off time can be delayed between 1 and 30 minutes.. This fan comes in Silver for that shining effect to sparkle your day. Your electrical bill is no concern to you as the Silent Fans range are energy saving, providing you an easy time. The Silent Fans maintenance only requires periodical cleaning using a cloth impregnated with a soft detergent, generally cleaned once a week to keep the build of dust out during non-used.