Manrose fan - Motion sensor ?

[utterlydiy]

Had a Manrose fan with timer fitted in bathroom with its own on/off pull cord as she dont always use the lights in summer etc. But then dont always remember to turn it off.
Can a Motion sensor be used controlling the fan as well as the pull cord if need be.
Also would it sense while in the shower behind a glass panel.

 

[Taylortwocities]

Can a Motion sensor be used controlling the fan as well as the pull cord if need be

Yes

Also would it sense while in the shower behind a glass panel.

No. Motion sensors are usually looking for a change in heat environment ( the IR in PIR = Infra-red).
Fit in ceiling outside the shower enclosure. Maybe at the place where you walk in…
You can shield part of the detection zone using tape, etc.

 

[ebee]

I will ditto to what Taylor just said.

A decent PIR unit though not a cheapo one - the reason, the bathroom etc can be a hostile environment for electronics components so a PIR switch such as suitable for outside would be OK (but rather ugly in a bathroom), some of these units that look prettier and designed for inside a home might be OK for living areas but not always for bathrooms and kitchens where there might be lots of condensation.
As an aside , timed over run circuits for bathroom fans are not always best made in terms of actual bathrooms and the same can apply for Electric Showers with fancy electronics in them (Some manufacturers might put an E as a suffix to the model number) sometimes they can give you a problem and that is why some of use tend to avoid those showers in bathrooms.

 

[opps]

Why not fit a fan with a humidistat. It will run until the humidity level drops below a given level. No need to remember to to turn it off or on. If you want one that deals with both moisture and "smells", Icon sell ones that have both a PIR and humidistat available as a module that plugs into the fan. Not cheap but I was happy with the one that I had for my downstairs bathroom. The upstairs room was a humidistat Manrose unit, I fudged a switch so that I could use it to remove smells. I didn't want it to run when the light was on the small hours of the morning.

 

[dal5band]

One solution is to use a timer fan with live supply (as normal) but use a separate "momentary" pull switch to trigger it (Instead of the light switch). The momentary pull switch only provides a live when being pulled but switches off when released. This triggers the timer fan which then runs until the timer ends.
Pull momentary switches are often used in disabled toilets as an emergency alarm usually with a red cord.

 

[flameport]

Also would it sense while in the shower behind a glass panel.

It would if it's a microwave type.
However they also detect things through windows, doors and even some walls, so may not be what you want.

. It will run until the humidity level drops below a given level.

In theory that happens. Reality is often different.
Humidity sensor fans are ideal if you want constant callbacks because it's on all the time or never works.

 

[ebee]

In theory that happens. Reality is often different.
Humidity sensor fans are ideal if you want constant callbacks because it's on all the time or never works.

Well said that soldier, if they working correctly then OK but if they a bit out of calibration (or perceived to be so by the ordinary person) they can be a problem, a motion sensor with a decent time period on the sensor is the best solution if you can not rely on someone switching a light on to trigger the fan.

 

[opps]

In theory that happens. Reality is often different.
Humidity sensor fans are ideal if you want constant callbacks because it's on all the time or never works.

I get your point. The one upstairs was well behaved. The Icon with the humidistat and PIR either saw dead people or imaginary moisture. It was behaved most of the time. I did once fit an xpelair one for a customer. It ran whenever it rained. To be fair, none failed to turn on, but, yeah, some ran when they shouldn't.

I fitted mine because I knew that neither she who longer talks to me or my stepson would run the fan when showering on sunny mornings.