Bathroom Extraction - Inline out of roof

Participant · 2025-01-08T13:24:14+0000

I'm using 100mm insulated aluminium ducting from Amazon with a cheap backdraft shutter between the fan and the vent tile. It's a really good solid solution and all steam and moisture issues have gone. Also using Manrose MF100T.

Richie · 2025-01-08T14:11:52+0000

I'm going to have a look at mine as I dont seem to have any condensation issues or water running back.

The fan is fitted to the ceiling of the bathroom and the duct (similar to downpipe but larger diameter) goes straight up to the roof and into a vent tile. Probably a 6-8 feet run? I havent noticed any water running back down and its all been ok for about 6 years :confused:

I'll try and remember to have a peek in the loft tonight.

Participant · 2025-01-08T14:54:42+0000

Richie said:
I'm going to have a look at mine as I dont seem to have any condensation issues or water running back.

The fan is fitted to the ceiling of the bathroom and the duct (similar to downpipe but larger diameter) goes straight up to the roof and into a vent tile. Probably a 6-8 feet run? I havent noticed any water running back down and its all been ok for about 6 years

I'll try and remember to have a peek in the loft tonight.

If it's well insulated and the fan is powerful enough, I don't expect that there would be any issues with water or condensation at all.

Richie · 2025-01-08T15:33:57+0000

Participant said:
If it's well insulated and the fan is powerful enough, I don't expect that there would be any issues with water or condensation at all.

Its not insulated at all. Not sure what model of fan it is.... I think its VentAxia but I will need to check tonight

Richie · 2025-01-08T19:38:37+0000

Participant said:
If it's well insulated and the fan is powerful enough, I don't expect that there would be any issues with water or condensation at all.

Here's my setup I have... Vent in the ceiling of the bathroom and then the ducting going to a vent tile in the roof (looks like I need to dust the fan :cry:

)

Not-insulated and the fan is at the bottom of the pipe (bathroom ceiling) but I have never noticed any water dripping back through the fan or anywhere :confused:

dlockers · 2025-01-08T20:26:32+0000

What's your issue then Richie? :S

If it works and it's fine, it's fine???

Richie · 2025-01-08T21:24:55+0000

dlockers said:
What's your issue then Richie? :S

If it works and it's fine, it's fine???

Oh no issue. I just see lots of people seemingly having condensation problems or suggesting the fan should be as far along the pipe as possible, pipe needs lagged etc etc so, I guess I am more confused by them rather than looking for problems.

Stu999 · 2025-01-08T21:28:11+0000

Richie said:
Here's my setup I have... Vent in the ceiling of the bathroom and then the ducting going to a vent tile in the roof (looks like I need to dust the fan )

What’s that suspicious transparent bag?

Richie · 2025-01-08T21:32:09+0000

Stu999 said:
What’s that suspicious transparent bag?

Hah, I only noticed that after taking the images so went back up and removed it as I noticed the tiny amount of condensation under it... Not actually ever been up inside my loft TBH. Looking to get it at least partially boarded at some point though.