venting my extractor fan outside

Doglover88

at the mo my extractor fan from the bathroom goes up into the loft space but i want to vent it to outside (via the loft). The fan is inline but I'm unsure of the best way to vent it outside? Do I get a replacement tile/vent for the actual roof, or will it go out through the suffits?

And who would be the usual tradesman to call to do this? I was thinking a roofer but a friend suggested plumber/bathroom fitter

Any comments/advice greatly appreciated

glenbat

davsidipp

you will require part p electrician as it is an extractor in a bathroom

Wayne3765

davsidipp wrote:

you will require part p electrician as it is an extractor in a bathroom

Can't see why an electrician is needed as the fan is in line so would be mounted in the loft and also no electrical work would be required because all that needs to be done is to connect some flexible duct between the fan and an extract vent which could be fixed to the soffit or pine end etc.

ozskin

try not to disturb the roof if it can be avoided and go through the soffit. wayne is spot on and any builder or hanyman should be able to tackle it.

Doglover88

thanks,
the loft is being used as a room so i want to vent it to outside as opposed to 'into the loft space' for obvious reasons

Any ideas how its vented through the soffits? Is 'aiming' the end of the ducting enough or is there some sort of end piece that is cut in/fitted to the soffit?

Many thanks in advance

mepone9

you would only have to extend your duct to the soffet cut a 4" hole in the soffet, fit your duct to a 4" vent using tyewraps or duct tape and then fix vent to the soffet

Avoriaz

Venting damp air into the loft is a very bad idea as it could lead to condensation, damp and rot affecting the roof timbers etc.

As others have said it is an easy and straightforward job to diy an extension to the hose and exit this via the soffit.

However you need to consider the rating of the fan as extending the hose will increase the back pressure and the fan may not be powerful enough to work properly. Pushing air along a meter of hose is a lot easier than three metres or more. You should check the specs of the fan and the maximum permissible length of hose and in any case try and minimise the length of the hose run.

Good luck.;)

HugoSP

Once the fan is up there consider lagging the hose.

Condensation inside or outside the hose is bad news for your house.

hardpressed

When the house was rewired the electrician insisted that I had to have a fan fitted in the bathroom that is vented to the loft, the hose just lays up there. I never use it, always open the window if necessary. It seems daft to me to have a hole in the bathroom ceiling, I know hot air rises but some of the cold from the loft must get into the bathroom. I can't think that letting hot steamy air into a cold loft can be a good idea. I'm thinking off blocking the vent in the ceiling would that cause any problems?

Moneymaker

Here's a typical vent in the soffit (or whatever it's called).

Wayne3765

Take a look here and see if there's a branch near to you , if there is call in and speak to someone who will provide all the advice and equipment you will need.