#Bathroom extractor fan flexible ducting how to#
#Bathroom extractor fan flexible ducting install#

Yes, shorter runs and keeping turns and bends to a minimum is best. I used foil therma wrap type insulation and used foil tape to secure tightly. It connects to an old overflow through the soffit. There is a slight fall left to right and I have a condensation trap installed at the extreme right end. Uses rigid piping - the distance between the inlet and the fan was to meet manufacturer instructions saying min 1m.

An inline loft fan would be better.Īttached is what I did for our bathroom fan.

If in the ceiling it will be much more prone to damage from water droplets travelling back down.

Is the fan an inline fan in the loft fitted horizontally or is it in the ceiling. If you use rigid plastic ducting you can then fit a condensation trap and insulate or lag the pipe work as you see fit and much more effectively.Ĥ. I always try to use rigid plastic piping.ģ. Flexi pipe has a lot more surface area resistance which increases the likelihood of vapour condensing before being vented. Venting into a chimney is asking for another damp problem, which you haven't yet seen.Ģ. Wasn't cheap at about £55 including the pipe connection but it fits well and is barely noticeable on roof elevation. I have a plain tile clay roof and used a klober roof vent kit edit( more correctly called tile vent). The vent should go externally through soffit or roof tiles. This eliminates any bends, or the need for rooing ladders.Įven if the fan is high up from the group, a good set of ladders will be enough to fit the grate.Īlso, make sure you cover the hole with mesh or something to stop the birds flying down it.Īgree with response (stef99) and your comments - that sounds like a bodge in a number of ways but probably not uncommon.ġ. and then take the vent straight through the wall to the outside.

#Bathroom extractor fan flexible ducting install#

Personally I always try to install fans on the wall. No one should be venting any steam or water in the chimney at all.

#Bathroom extractor fan flexible ducting how to#

but this is not a real solution as the water will just build up at the bottom of your chimney causing even more damp.įor details on how to do it just search 'roof pipe flashing' in google. The vent should have gone directly thorugh the roof with some sort of flashing.Īs for the condensation you have, you can try poking holes in the vent to drain any water out. No one can see you picture as it re-directs to warning that hotlinking is theft. He recommended a silent Vent Axia.ĭo I need a different layout? This is a photo I found on the web, is this a better layout, Īnd if there is water build up, is there a design to collect the condensed water and prevent any leaks or going back into the bathroom? The second problem is that my fan is fried and I am not sure what to buy yet, especially not until the problem is properly resolved. I think it sucks alright (no pun intended, so even without the fan not working -fan is fried- the steam goes through and condenses again. I opened it up and there was some water build up in there again. The first observation was that the rockwool was damp again today around the joint of the two ductings. He covered the entire ducting in rockwool about a week ago, but I doubt this will work. The pipe is too long, about 2.5 meters running across the loft and into the chimney. The issue I believe is with the design, I just think it's wrong. Also I can't imagine I have to spend £2k to insulate the loft rafters, just to save from condensation in the ducting pipe? For the record my loft floor is all insulated with pretty thick rockwool under the boarding. Well yes, he has a point but that is somewhat silly, as he knew this would happen when installing the ducting. His initial response was that I have to insulate the rafters in my loft because it's cold, causing the hot steam to condense. I emptied half litre of water from the hose and it also has mold built up inside. Obviously they are not designed to carry water but vapour, although this is the side effect and not the issue. One of my ceilings also got a little damp stain, coming from the two ductings joined together with hose clips in the loft. Eventually I figured out the steam was condensing and dripping back into the fan. The problem, one lovely evening after it got colder outside, my fan gave a huge spark and tripped the fuse. My bathroom fitter used a flex fan ducting with a standard extractor fan in our bathroom, which goes into one of the disused chimneys.