Installing new extractor fan in bathroom

[richieboy]

Have been meaning to do this for a while, essentially my bathroom has no extractor fan so after recently replacing the yellow suite i'm going to try and sort this out too, it seems i have two options of where to put it:

- Wall
- Ceiling

After looking at loads of them i'm thinking i like the simplicity of an in-line fan in the loft above like this one:

http://www.screwfix.com/p/manrose-mf100-w-100mm-mixed-flow-fan/26867

Hooked up to a timer (need to find that), hooked up to the bathroom light so it comes on with the light and stays on for 10mins or so, that way i just need a hole in the ceiling with a grill, ducting to the inline fan, then ducting through the eaves and a hole in the plastic soffit with a grill in it...

Anyone got any opinions on this? Just making sure i've not made any glaringly stupid omissions! Will likely install it all myself but get a sparky to do the wiring...the worst bit is going to be the loft as its quite a small space to work in but should be able to manage it!

 

[Abyss]

The fan usually has a permanent and switched live feed then a timer built in that's controlled via a pot that can be rotated to change the time.

If you are putting it in the ceiling I would consider installing a sheet of ply above the plasterboard screwed to the joists then cutting a hole through both the plasterboard and the ply as it will reduce the vibration noise.

 

[Adam_151]

If you have a suitable spot* in the wall, go for wall mounting, if you have it in the ceiling and duct through a vent in the soffet you are introducing the length and introducing bends, thus reducing flow.

115m core hole, mavity grill on outside 100mm timer fan inside, fan iso outside bathroom above door. I prefer 100mm soil pipe through the wall rather than flexi duct, but sometimes it has to be flexi if nothing else available

For course by the time you have factored in rental of a core drill, it might be cheaper just to get it done by someone who has the kit, you could save money by moving stuff out the way of the work and sheeting down and cleaning up afterwards

Watch out for concealed pipes, cables, lintels, soil stacks and waste pipes that prevent the grill going on outside, etc

 

[Uhtred]

Do you have to consider condensation with these? We inherited a ceiling extractor in our bathroom which we don't use because moisture kept dropping down.