extractors

Upgrading my in-line extractor fan (ducted from ceiling in-take to soffit extract grille). A couple of questions: 1. If I'm using one of these with insulated flexible ducting to a soffit grille, do you think I need to bother with a backdraught damper flap like this in the duct? Anyone else get...

Hello. Was wondering if anyone can help. Just had bathroom done and the fitter installed an inline Osily extractor which, quite frankly, is useless! So I've replaced it with a Manrose MF100T which is far better. However, the Osily has a N, L and LT connection. The Manrose has a N, L and LS...

Hi I have installed one inline extractor fan above a first floor bathroom shower. The unit is in the loft. It is not as strong as I would like and want to know whether I could add a second incline fan to increase the suction either using a couple of Y connectors (so both fans are sucking the...