Hi,
We're currently having a shower put into our 2.2x2.5m bathroom, and I understand we need to upgrade the extractor fan. Currently we have a ceiling-mounted centrifugal model, which has solid plastic ducting that takes it up from the bathroom false ceiling, and then lengfhways through around 4-5m to an exterior wall.
I've worked out that 20x the volume of the bathroom, as recommended when there's a shower fitted, would need 180m^2/hr flow rate. Also, that it'd have to be a centrifugal to force the air along the 5m duct.
Trouble is - they're quite hard to find. I've come close (Manrose Pro Showerlite Centrifugal Chrome 35W Shower Fan Kit on Screwfix), but these require the fan itself to be fitted inside the ceiiing. Do-able, but expensive.
Can anyone suggest any other suitable fans? Do I really need a 20x flow rate, and will an axial fan do?
Thanks!
Damian