Roof Vent Tile for Shower Extractor

[pring_ing]

Hi folks. Currently getting a new shower room fitted. I have an extractor fan that can be set to 15L/second or 21L/second - https://www.cnmonline.co.uk/xpelair-simply-silent-...

Builder has suggested using a vent tile to match the plain tiles in my roof - something like https://timloc.co.uk/products/rtv-p-plain-roof-til... - which has a Free ventilation area of 7,000mm2. I'm not sure that's enough though for the air flow required?

Does anyone have a recommendation for what roof vent tile they'd use for a shower extractor running at 15L/second? Or would you just use pipe or something sticking out the roof?

[Rough101]

It has more free area than your duct will, and is fine.

Keep flexible ducting as short as possible for minimum resistance

[LooneyTunes]

Rough101 said:

It has more free area than your duct will, and is fine.

Keep flexible ducting as short as possible for minimum resistance

Better still, use solid duct. It’s not hard to work with.

Don’t forget a condensate trap if you’re running ducting vertically through an unheated loft, otherwise you can end up with condensate running back down and dripping/blowing the fan up (as happened in a new build we bought).

[Rough101]

LooneyTunes said:

Better still, use solid duct. It s not hard to work with.

That’s what I meant, just use flex to help at the tile

[pring_ing]

Thanks folks, helpful advice as always!