Bathroom extractor fan

missile

We are looking to replace a rather ineffective and very noisy extractor fan (Vectaire AMF 100T). We have quite a distance on the extractor pipework.

We would appreciate advice on which model might suit best.

moonrakerz

Most bathrooms have a 4" fan fitted which is very rarely adequate. Look for a 6".
A silent fan will not shift much air !

http://www.google.co.uk/products/catalog?client=opera&rls=en&q=Xpelair+SL150&oe=utf-8&channel=suggest&um=1&ie=UTF-8&tbm=shop&cid=17966259404340129628&sa=X&ei=aEp_TqqDJI6R0QXW6vXDCQ&ved=0CGkQ8gIwBA

CharlieBilly

Fonz you need one to keep you cool?

missile

moonrakerz wrote: »

Most bathrooms have a 4" fan fitted which is very rarely adequate. Look for a 6".
A silent fan will not shift much air !

http://www.google.co.uk/products/catalog?client=opera&rls=en&q=Xpelair+SL150&oe=utf-8&channel=suggest&um=1&ie=UTF-8&tbm=shop&cid=17966259404340129628&sa=X&ei=aEp_TqqDJI6R0QXW6vXDCQ&ved=0CGkQ8gIwBA

We are rather restricted on choice as the vent pipe goes into the loft and through a 100 penetration in the roof.

sw67

Get a 4 inch inline fan and put it in the loft above the bathroom - thats what i did and you should be able to use existing wiring and ducting. Mine is very quiet and i have split the power at the switch on the wall so i can run it for as long as i like

TimBuckTeeth

Normal (axial) fans are not much use with a length of ducting, they cannot overcome the back pressure caused by the ducting so produce very little airflow. You need a centrifugal fan to provide adequate pressure and airflow, usually this means an inline fan (fitted somewhere along the ducting in the loft). An inline fan is safer, can be quieter and can be more powerful as the body size can be larger.
Check the maximum duct length in the specifications when choosing a fan, and make sure it is centrifugal, not axial or mixed flow.

I use an Xpelair XID100, which fits in 100mm (4") flexible ducting, and would recommend it :
http://www.dealec.co.uk/acatalog/Xpelair_XID_Inline_Duct_Fans.html
It is more expensive but it is powerful enough to prevent mold problems and is running smoothly after 5 years use as it has ball bearings rather than the cheap sleeve bearings found on many fans.
The small inline fans like this Manrose one (which is not centrifugal) are too small and underpowered and best avoided.
http://www.screwfix.com/p/manrose-in-line-white-20w-shower-fan-kit/15061

sw67

Thats the fan i have as well - no problems in 3 years or so. Well worth the money

missile

I shall give that a try. Many thanks for your prompt responses.