Bathroom extract fan direct into attic

enfant terrible

My fan currently exhausts directly into the attic.

Reading online best practice is to vent out through the roof and not through the fascia.

Anyone know which type of tile would be best to use?

https://www.ebay.ie/itm/Roof-Tile-Vent-To-Fit-Marley-Ludlow-Major-With-Optional-Adaptor-Kit/221142305830?hash=item337d1bcc26:m:m_sEppLyK87u3foqSVGhaZQ:rk:7:pf:0

or the universal type
http://www.iconbp.ie/tile-vents/

The lips

I have two of the icon on my roof, felt like good quality in my hand.

Doing the job up there 4 years now

Doop

That ebay option really doesn't clearly show any level of decent information, I'd be curious about its weather proofing abilities.

Hands down id be going for the icon.

Lumen

I know that tile vents are commonplace, but would it not be less risky from a water ingress perspective to vent through a gable wall, if one is available?

copacetic

enfant terrible wrote: »

My fan currently exhausts directly into the attic.

Reading online best practice is to vent out through the roof and not through the fascia.

Anyone know which type of tile would be best to use?

https://www.ebay.ie/itm/Roof-Tile-Vent-To-Fit-Marley-Ludlow-Major-With-Optional-Adaptor-Kit/221142305830?hash=item337d1bcc26:m:m_sEppLyK87u3foqSVGhaZQ:rk:7:pf:0

or the universal type
http://www.iconbp.ie/tile-vents/

mine vents out through the fascia which has mesh panels, can you link to the online info that it's not good practise?

enfant terrible

copacetic wrote: »

mine vents out through the fascia which has mesh panels, can you link to the online info that it's not good practise?

Sorry for late reply
https://diy.stackexchange.com/questions/13508/can-i-vent-a-bathroom-through-the-soffit-if-i-use-a-product-designed-for-it

https://www.youtube.com/watch?v=K3vM4i31Y40

Calahonda52

The OP is asking about venting through the fascia, the two links are about venting out through the soffit, which is not the same.

The links are using the verb "sucked" repeatedly, giving the impression that the soffit vents are under serious negative pressure, which is crap.

If the roof space is vented at or near the apex, then we have natural stack ventilation.
If not, then it's cross ventilation, based on the wind induced pressure gradient across the building from windward to leeward.

the video also allude to using insulated ducting, I have never seen it used in Ireland,
going out through the soffit eliminates the risk of the condensate running down the uninsulated ducting.

If the roof space is well ventilated, then ventilating into the attic space is not the worst, as, except for some very few periods, we always get some solar gain on the roof, which will be enough to dry out any condensation that might arise, not like eastern Europe where it might be below freezing for months

fred funk }{

Calahonda52 wrote: »

If the roof space is well ventilated, then ventilating into the attic space is not the worst

It's the worst option. I have personally seen the damage done in an attic by water from condensed bathroom moist air vented straight into the attic. Don't know how anyone could think this was an option.

rivermisty

I have one bathroom vent exiting in the attic and another that vents out through the tiles. Is it possible to get some kind of splitter so I could vent both tubes out through the same tile vent?

my3cents

rivermisty wrote: »

I have one bathroom vent exiting in the attic and another that vents out through the tiles. Is it possible to get some kind of splitter so I could vent both tubes out through the same tile vent?

If you do that then won't one bathroom fan be pushing some of the damp air into the other bathroom?

But https://www.ie.screwfix.com/circular-y-piece-white-100mm.html I'd be thinking about having one fan pulling air out rather then two fans pushing the air, but I'm sure someone will explain the correct way.

Calahonda52

fred funk }{ wrote: »

It's the worst option. I have personally seen the damage done in an attic by water from condensed bathroom moist air vented straight into the attic. Don't know how anyone could think this was an option.

We can all write we have seen........ without the proper context they are worthless

The option is not the worst iff the attic is well ventilated at or near roof apex level: in many cases they are not ventilated at all, even if there are soffit vents, which can be stuffed with insulation or other junk. or in older house, there is concrete filled in between the rafters from wall plate to felt.

This ventilation can be done via roof tile vents or vents fitted under ridge board in gable ends

Lumen

my3cents wrote: »

If you do that then won't one bathroom fan be pushing some of the damp air into the other bathroom?

But https://www.ie.screwfix.com/circular-y-piece-white-100mm.html I'd be thinking about having one fan pulling air out rather then two fans pushing the air, but I'm sure someone will explain the correct way.

Inline centrifugal fan fitted after y-connector, switches but no fans in bathrooms. Quieter too.