Kair Smart 100mm Intelligent Extractor Fan with Humidistat Timer and Data Logger (Smart Fan Plus)

Item delivered on time and exactly as described.Installation instructions where emailed and included in the package. Instructions very clear and straightforward. Fan is very quiet in trickle mode and more than powerful enough in boost.My only comment would be that the buttons and display (only really used when setting operation) are in the top corner making them a bit difficult to see if fan is mounted high. Other than that I'm very happy with the quality and functionality.

This fan is well made and relatively quiet, and the installation was straightforward with a standard 3-pole isolator. The airflow is good, and I appreciated the adjustable trickle and boost speeds, as well as the humidity sensor settings.Unfortunately, the logic that controls how the fan responds to humidity is flawed. If you’ve connected a switched live (e.g. from the bathroom light), the fan ignores the humidity sensor completely while the light is on. That means it won’t ramp up to full speed even if the room is filling with steam from a shower — it just runs at the boost speed you’ve set for the light. The humidity boost only kicks in after the light is turned off, which defeats the point of having a humidistat.There’s no option to allow both triggers to work together, or for the fan to prioritise humidity.EDIT: I have upgraded my review from 3 stars to 4 stars. I went to look at alternatives in the UK market, and it's pretty clear that this unit has the best granularity of configuration and the best UI of anything else available. Most other fans only have 1 or 2 fan speeds. Adjustments are made by turning screws or adding or removing jumpers across terminals. The Kair is so much better in so many ways that I am happy to live with its faults.

For a unit with humidity control this is reasonably priced. It also has a lot of features / settings that can be adjusted fairly easily from the menu. This is handy for adjusting the speed / timer / humidity target level. I wanted the flex outlet at the bottom as can be seen in my pictures so. Had to move the little magnet to the opposite corner to get the kair logo the right way up and not trigger the unit’s safety feature, was fairly easy to do although you then have to adjust settings with the display upside down which wasn't too bad and once done your unlikely to need to adjust much again. Happy with this unit so far and would recommend/ use again. Instructions were good and overall I'm happy with the quality. Comes with a pull cord but this can be taped up and put inside but ensure the boost light is out before you put cover on otherwise you will need to go back in to pull the switch , mine came with the switch set to on.

Had this installed for 3 months but ... This is a good fan but it didn’t meet my expectations based on the description so only 3 stars. However would probably use again.Good points:It is programmable using the buttons and display, there is a reasonable range of options available. I have used default apart from the max speed with the pull cord where I have gone down one setting, still works but quieter.It is quiet, although it has recently developed a ticking noise after a windy night, hoping this is some debris blown in but have not had the opportunity to check as will need to remove the outside cowl because the clips on the fan broke when trying to remove.There is a low (continuous), medium (over-run/humidity), high (pull cord) setting.It has a pull cord, not ready to go fully automatous yet.It looks “smart”.Bad points:The term “smart” is overdone these days - this fan is not really smart.No choice in cable entry, top left of centre for through wall and top centre for surface. Had to put a new cable in. The reason is that the sides have two circuit boards. I have a background in electronics and I was surprised how much there was.When initially setting up you have an hour where it works without the front cover, after this it stops when the cover is removed, makes later tweaking a pain.I was keen to use the auto humidity setting but I have concluded this is useless, it just causes the medium setting to run continuously, the humidity setting for this cannot be altered, so effectively useless.In summary: I researched extensively before buying this but was disappointed by the actual performance, especially considering the price. However it is probably still the best on the market, the suppliers just don’t understand the market! Think carefully what you need, it may be available much cheaper.