Are there any bathroom extractor fans that are any good?

A question about : Are there any bathroom extractor fans that are any good?

We had an extractor fan fitted by an electrician when we had our loft done. It seems to be completely useless and only makes a noise, so we have to have the window open all the time.

Is it worth buying a different one, if so what, and will it be an easy job to replace do you think, given we already have a fan in place?

Thank you!

Best answers:

• How long is the duct from the fan to the outside?
  If it's more than a metre or so you need a centrifugal fan, not an axial one. The centrigugals tend to be quite a lot more expensive, and it's quite possible your electrician fitted a cheap axial.
• Owain is right. You can buy a fan for Ј20 but it is very ineffective unless it ducts straight out of the wall.
  In line fans are a good option as they partially suck and partially blow and stop the condensation turning back into water in the pipework.
  Some of the VentAxia SELVs are a good option as they operate on per,anent tick over and are then boosted when lights etc are turned on.
• A decent quality centrifugal fan is the way to go, they generate a lot more pressure so ensure a good flow even if there's some restriction on the outlet.
  Xpelair do some pretty powerful ones, look at their DX100 / DX200 / DX400 range or CF20 /CF40 for condensation sensing/control.
  I fitted one for a relative, either cf20 or cf40, in a regular bathroom, through wall duct, and it was more than sufficient on low or medium speed.
• What sort of fan do you have? I'm planning on fitting one of these in our new house:
  https://www.extractorfanworld.co.uk/m...imer-247-p.asp
  It comes highly rated and seems easy enough to install (already had electrician quote for wiring up).
• Inline XID100, on wall/ceiling DX200
  Proven in over 500+ jobs for us with a minimal fail over the years
• No extractor fan will be able to extract the air if the bathroom is well sealed.
  There needs to be somewhere for the air from inside the house to flow into the bathroom to replace that which the fan is trying to extract to the outside.
  A decent size gap under the bathroom door, or the door being left open a little will enable the extractor fan to operate effectively.