AirflowQT100T Extractor Fan with Auto Start & Adjustable Timer – 100mm/4 Duct - German Made, QuietMark Certified 25 dB, 2-Speed Operation Upto 25 L/s, Energy Efficient 5/9W, 3-Year Warranty

Easy to install and is quiet and very powerful. Setting up the options for the timer and other preferences is difficult because the switches and labelling are so small that much better than 20/20 vision is essential - or a magnifying glass. The downside is the backdraught shutter which clatters in a high wind to such an extent that I fitted foam rubber to quieten it. This means it leaks cold air into the room in a high wind, but the noise of the shutter would otherwise be intolerable. (All backdraught shutters are like this, so it's not so much a criticism of the fan as of the inability of fan makers to come up with anything better than this.) I have fitted a cowl on the outside of the house and this is a great help. But I must emphasise that this is the best extractor of its size I have ever used, and remarkably quiet.

There were no problems with delivery and the unit arrived within expected dates. I replaced like for like. So the installation was fairly straightforward. The original Airflow 30 lasted for 7 years. I think it would have lasted longer if I had carried out more regular maintenance by carefully cleaning the rotary blades every 3 months or so. The use of baby powder after a shower is the main problem. The fan is more expensive than other fans, but it has neat styling, no back draught when closed, and very good extraction power. On the down side you have to purchase a separate timer unit if you want the fan to continue operating after it is switched off. The timer from my original fan worked without any problems. If you are thinking of replacing an existing 100mm fan, just be aware that the hole diameter in the ceiling will need to be increased, although the fan still connects to a 100mm flexible extraction hose. Do your own research are check out installation videos.

This is superb. Wanted to replace a noisy 100mm fan during a bathroom refurb. This 120mm unit extracts loads of air, is very quiet, and also looks neat. Has a 2-minute delay, which is good, so doesn't go on every time you make a quick visit. Plus a humidistat, I now have a 2m square wet room without windows, and when when I'm done, I turn off the light, the atmosphere is back to normal within 2-hours, and the room feels dry and airy.Revised my review from 5 to 4 stars, as the fan failed after 18-months of use. Just wouldn't come on, and the room stayed warm and stuffy. Interestingly, the original fan actually got quieter over time, to the point where I sometimes removed the cover plate to check it was still working. It usually was, until it wasn't. Bought a replacement so easy to swap, four screws and 3 push-in wires. Maybe just unlucky with the original and the replacement may last for 20-years?!? Annoying that the replacement (via Electricals247) had all four plastic clips broken on the cover plate. I could use the original cover instead, but a broken product should not have been dispatched. The rattling in the box was a clue!

This fan is quite, quite excellent: When taking a shower, the humidity module (I installed this fan with the humidy-and-timer module, purchased separately but also from Amazon) automatically turns on the fan and by the time I step out of the shower the fan has extracted enough humidity from the bathroom that the mirror isn't even steamed up. This is in a 4m x 4m bathroom. Also, the slowly opening and closing iris mechanism has a delightful look to it.One word of caution: while the fan can be fitted surface-mounted using the "contoured skirt" provided, it looks rather ugly, protruding from the wall by about 9cm or so. To look good, it really needs to be fitted flush to the wall. In my case, that involved removing a chunk of wall around the existing vent hole to provide enough space for the fan's motor housing to be seated inside (15cm across by 8cm deep). Since every local builder I approached had core drills which could only cut a NEW vent hole, rather than widening an existing one, that meant a few hours work myself with cold chisels, brick bolsters, masonry drills and a masonry hammer.Definitely worth doing, however, as the fan now looks good and works extremely well.