Domestic extractor fan problem/question

[Kate]

hey,

Hoping someone may know more on this than I do. Extractor fan above a shower in an en-suite, in-line fan so unit is up in the loft.
I know you can get condensation and "dripping" from the unit. How bad can this get?

Had a customer ask me to look at why their fan had stopped working. It was only 2 or 3 months old. Jumped up in the loft, removed the duct, could have easily filled up 2 buckets with the amount of water that came out. Travelled from the roof tile, right through the duct (had a drop point here) through the fan unit itself, into the duct on the other side. There was another drop point here which had stopped it from entering back into the shower room!

I may be completely wrong, and tell me if I am. But to me, that's far too much water for condensation surely? I was thinking faulty roof tile as this was existing and many many years old.

 

[Kate]

I instantly thought condensation but I was surprised by the sheer amount of water!! Wanted to ask advice before I report back to the customer.
Ducting that's in place is disgusting so I'm picking some up in the am

 

[Octopus]

Is there sufficient airflow under the door of the bathroom?

I normally provide an estimate - option A is a like for like , option B is for a far better unit - most people opt for option B

 

[Kate]

Is there sufficient airflow under the door of the bathroom?

I normally provide an estimate - option A is a like for like , option B is for a far better unit - most people opt for option B

This wasn't my job, i didn't install the original fan. Was just asked to look at it when it stopped

 

[Andy78]

Original was a manrose one, have the details in the truck. Not sure which model but had some scathing reviews on amazon

There are Manrose and there are Manrose. The one in my link is ten times the unit of the one in your picture. Those are piddly little ones not really suited for purpose.

 

[Dave OCD]

This is a very common issue, when the ducting isn't taut you can get a heck of a lot of water building up in it, and the muck that builds up is horrible, particularly with people who use talc it seems.

 

[Octopus]

This wasn't my job, i didn't install the original fan. Was just asked to look at it when it stopped

Not suggesting it is your original job

 

[LankyWill]

Its building Regs to install insulated ducting inside loft spaces, as the duct itself condenses. Make sure its taught and not sagging or swap it out for 4'' soild.

 

[Kate]

Not suggesting it is your original job

I know I said that cause I don't know what colour the door was let alone a gap hahah

 

[Kate]

There are Manrose and there are Manrose. The one in my link is ten times the unit of the one in your picture. Those are piddly little ones not really suited for purpose.

Yea I saw! Your link was 240 odd m3/hr. going to message customer and suggest they put a stronger unit in

 

[Kate]

All you guys are totally awesome. Glad I asked on here, part of me had wondered if it could be the roof vent tile.
Andy78, I'll see if I can pick up one of the fans you suggested by tomorrow. Or something very very similar.

 

[Octopus]

I know I said that cause I don't know what colour the door was let alone a gap hahah

If they go for the better fan, best you mention this too!

 

[Andy78]

If they go for the better fan, best you mention this too!

But if she mentions the colour of the door she might end up with the job of re-painting it....

 

[Kate]

But if she mentions the colour of the door she might end up with the job of re-painting it....

They would regret that!

 

[Dave OCD]

Haha I'm not a painter either !

 

[NDG Elecs]

You can, as witnessed, get a heck of a lot of water sitting in those flexis. A condensate trap/run off and some insulation would definitely not be a bad idea. As well as either rigid duct or keeping the flexi taut.
Has the roof vent been checked, as that could be letting water in.