Times I have been up in the loft, I can feel by weight and noise that a lot of water sits in the ducting, far from ideal. MF100S benefits from 3 speed settings which can be set via dip-switch at installation. This allows the fan to operate at an appropriate rate for user requirements. Suitable for mounting in lofts or ceiling voids and for use in applications such as bathrooms, shower rooms, kitchens and more The Manrose MF100Sis a powerful inline extractor fan which is ductable up to 12m. An inline fan is installed in the loft or ceiling void above the bathroom (or kitchen etc). Ducting is attached to each end of the fan with one length going to an internal grille in the ceiling of the bathroom and the other going to a grille on the external wall, soffit or roof.

Fan performance is generally quoted with the fan mounted in free space, with no ducting. The performance degrades rapidly as restrictions to flow are added, the worst thing being the stretchy 4” duct. Not only does it have not much area, but all those ribs create turbulence that further restricts the effective area. And the grills are often restrictive too, especially after a few years of use when the insect grills in them will be clogged up with fluff. I would say that a fan rated somewhere around 200m3 per hour is probably sufficient provided it’s installed in a way that means it can get somewhere close to that in use. The easiest way to achieve that is to make the ducts and grills bigger. But don’t go too large as then the air speed will be very low and this could lead to condensation on “dead spots” for example on bends. Silent operation - Noise is reduced due to the extractor fan being installed in ceiling voids or in the loftWe have a small bathroom, big standard 1930's one, so do you think the 100T when ducted properly should be sufficient?

We've always been dissapointed with the performance, especially after he told us it was overkill, and we've put it on maximum timer and maximum speed. Fitted with a high quality ball bearing motor, MF100S is continuously rated and guaranteed for a minimum of 30,000 hours or 3 years. The MF100S inline fan is fully BEAB approved, building regulations compliant and has is IPX4 rated. Manrose MF100S Features Had already had an idea to slope the ducting down and out of the house, so pleased to see that is mentioned above. Rated to IPX4. Easy installation and maintenance with the fan assembly easily removed from rigid ducting installations using the specially designed constructionLooking at the gap approaching the eaves, it would seem it is too narrow to take round pipe, the previous fitter just kind of stuffed the flexible pipe down there, so I think I will have to run 125mm pipe from the fan, and then annoyingly switch to a rectangular style with a convertor to enable it to get through the eaves and down to the soffit.

The isolator switch works, which is a bonus, the electrics at the top had no water ingress or moisture inside. watts power consumption (low / mid / high speeds). 50 / 60 / 68 litres per second / 180 / 216 / 245 cubic metres per hour extraction rate (low / mid / high speeds) The Manrose MF100T is a powerful inline extractor fan which is ductable up to 12m. An inline fan is installed in the loft or ceiling void above the bathroom (or kitchen etc). Ducting is attached to each end of the fan with one length going to an internal grille in the ceiling of the bathroom and the other going to a grille on the external wall, soffit or roof. With regards to joining the ducting, is duct tape sufficient, or should I be looking at some kind of adhesive for a better longer lasting fit? I haven't investigated at all yet, but one thing he did fit is an isolator switch for the fan, so that will make working on it easier.The only negative I can see might be noise, in that the fan will be directly above the shower (Currently it is above the landing cupboard), BUT while the shower is on you won't hear it, and hopefully if it's way more efficient I won't need to have the timer at max for 25 minutes, perhaps 10 would do. We're also thinking about cutting a new hole in the ceiling (Filling and patching up the old one) where we actually want it, and then common sense would tell me that it would make sense to have the fan on the nearest joists on the way to the outside - I think we would swap to the front soffit as that is the closest by some margin. Mixflo fans can be mounted in a variety of applications as shown and are suitable for use with either rigid or flexible ducting