The Manrose Quiet Fan is the latest in domestic ventilation to incorporate a high extraction whilst producing an incredibly quiet running volume. Designed for wall and ceiling mounting, this comprehensive range is ideal for bathrooms and toilets. The unit also comes complete with a performance enhancing turning vane system located in the spigot to improve performance by maintaining a high output.Specifications Mounting: Wall Noise: 27 dB(A) Hole Size: 4" Type of Extractor: Axial Number of Speeds: 1 Maximum Pressure: 23 p.a. Fan Speed: 2300 r.p.m. High quality ball bearing, long life motors continuously rated and warranted for a minimum of 30,000 hours or 3 years Manufactured using high ABS thermoplastics for strength and durability Decibel Level o