Inline extractor fan

[r_c]

Our celing mounted extractor fan has kicked the bucket. I am considering replacing with an inline fan.

Currently the ducting goes between the ceiling and the loft floor. The loft is insulated with two layers of insulation below the loft floor.

* Do inline fans sit above or below the loft floor?
* And what happens if I use uninsulated ducting like in this product image?

https://media.screwfix.com/is/image//ae235?src=ae235/26867_A1&$prodImageLarge$

 

[Deleted member 174758]

Our bathroom is internal and windowless. It is extracted using an in-line fan. The fan is in the eaves (we have a habitable loft space), fixed to the wall, but is not in an insulated area. The only issue we had was a small amount of noise transmission through the wall, so I remounted the fan on rubber feet using frame anchors to insulate the wall from any vibration. It's been there 27 years so far and I'm on my second fan motor.

 

[JohnD]

Above the floor. If you put a piece of carpet underlay or something on both sides of the mounting board, and rubber tap-washers under the screw heads, it will minimise vibration.

The Soler & Palau Silent fans are more expensive, but very quiet and I think better. If you have steamy showers I'd suggest about 240 cu.m/hr throughput with a timer overrun.

Electricity cost and noise are negligible.

You can flop loft insulation over the duct to reduce condensation. Rigid duct is better and you can tilt it so any water runs outside