Switching Fan / Lighting In Bathroom.

Joined
11 Jan 2004
Messages
42,595
Reaction score
2,613
Country
United Kingdom
Hi guys.

I'm refurbing the bathroom at the moment.

Wanting a TD350 SL to run all the time the room is occupied, then for an overrun period after the room is vacated. I don't want manual switch operation.

So, I'm plumping for a ceiling-mounted PIR, set to operate at any time, with a 20 min. overrun.

I'd also like to switch the lighting automatically too, but would like the lighting to operate independantly of the fan.This does not need overrun, but does need inhibiting during daylight hours.

Rather than having two separate units, is there such a thing as a single ceiling PIR with two independent outputs? I can't seem to find anything.

Just don't want to clutter the ceiling up with more than I have to.
 
Sponsored Links
Wanting a TD350 SL to run all the time the room is occupied,
Even if someone has only gone in there for a few minutes to clean their teeth, of just a few seconds to open/close a window or a blind?

Isn't that both pointless and wasteful?


I'd also like to switch the lighting automatically too
You do know that sooner or later that will drive you bonkers?


Just don't want to clutter the ceiling up with more than I have to.
Just what is wrong with a light switch?
 
I want a unit that will not only operate light, fan whist in/out of room in daylight/night but also wipe my arse!
 
... So, I'm plumping for a ceiling-mounted PIR, set to operate at any time, with a 20 min. overrun. I'd also like to switch the lighting automatically too, but would like the lighting to operate independantly of the fan.This does not need overrun, but does need inhibiting during daylight hours. Rather than having two separate units, is there such a thing as a single ceiling PIR with two independent outputs? I can't seem to find anything.
I think you probably can be fairly confident that such an animal does not exist. You're not only asking for 'independent outputs', but that one of them should have an over-run and the other have daylight inhibition (but not vice versa) - such an unusal requirement that I can't imagine the demand would be enough to justify such a product being produced. Furthermore, even if you had extensive electronic skills, butchering a PIR to achieve this functionality could be very difficult, and maybe impossible within the available space.

I would also second what others have said about PIR-controlled lighting being a complete pain, once the novelty has worn off, and potentially dangerous in a bathroom.

Kind Regards, John.
 
Sponsored Links
Just to point out that the 'over-run' will be in the fan and not to do with the PIR.

I suppose anything is possible these days.

However, asking one 'eye' - without a nose or brain - to do what you want doesn't seem feasible.
 
Yes, want it on whenever the room is occupied. I shall use the TP switch outside if I need it off.

The room suffers terribly from condensation and mould, despite having a window.

However, I am open to suggestions.

Thinking of 2 x 28W 2D fittings switched from a PIR with an overrun that should stop it switching off when you've got shampoo in your eyes...

Again, open to suggestions.

What is wrong with a light switch?

Well, what I didn't say is that I have three boys aged between 7 and 12.

I don't want the switch on the outside as they will act the goat and turn it off when someone is inside...

I don't want it inside because the only place it can go would be close to a shower cubicle, which, owing to the direction of the joists, needs to be raised up on a step to allow for the waste pipe. This would bring the switch body into Z2.

Now, I could do what I did in the boys' bedrooms and fit an SELV PTM switch, linked to a relay.

What would you do?
 
With a PIR, a light sensor and a bit of logic it could easily be implemented.

But why would you?
 
Just to point out that the 'over-run' will be in the fan and not to do with the PIR.

I suppose anything is possible these days.

However, asking one 'eye' - without a nose or brain - to do what you want doesn't seem feasible.

No, I've checked with S&P and TLC...that fan has no timer, so the overrun would be set on the PIR.
 
Just to point out that the 'over-run' will be in the fan and not to do with the PIR.
The fan is question does not have a timer - but, even if he used one which did have, the requirement for one standard output and one daylight-inhibit output would almost certainly make his desires insatiable in terms of 'off-the-shelf' products!

Kind Regards, John
 
What is wrong with a light switch?

Well, what I didn't say is that I have three boys aged between 7 and 12.
I have noticed this response several times lately.

I do admit to being a grumpy old git, but is it too much to expect children to be brought up properly and behave responsibly or
do they pretend they are in a supermarket ALL the time?

Redesign the house because there are children.
 
I want a unit that will not only operate light, fan whist in/out of room in daylight/night but also wipe my a**e!

Hmmmm... :eek:


OK. I'm now understanding that you don't like PIR's for lighting control.

You reckon the fan should not be on all the time someone is in the room.

My requirements are that the fan needs to be foolproof operation, IE it should not be possible to use the bathroom without the fan operating. A PIR with delayed start??

For the lighting, I don't want a switch outside or an LV pullcord inside.

Maybe an SELV switching system?

How would you do it?
 
What is wrong with a light switch? Well, what I didn't say is that I have three boys aged between 7 and 12. I don't want the switch on the outside as they will act the goat and turn it off when someone is inside... I don't want it inside because the only place it can go would be close to a shower cubicle, which, owing to the direction of the joists, needs to be raised up on a step to allow for the waste pipe. This would bring the switch body into Z2.
Ceiling-mounted pull switches are widely used in bathrooms, aren't they?

Kind Regards, John.
 
I'll just repost this bit as I was adding it when you posted, John.
OK. I'm now understanding that you don't like PIR's for lighting control.

You reckon the fan should not be on all the time someone is in the room.

My requirements are that the fan needs to be foolproof operation, IE it should not be possible to use the bathroom without the fan operating. A PIR with delayed start??

For the lighting, I don't want a switch outside or an LV pullcord inside.

Maybe an SELV switching system?

How would you do it?
 
I'll just repost this bit as I was adding it when you posted, John. OK. I'm now understanding that you don't like PIR's for lighting control. You reckon the fan should not be on all the time someone is in the room. My requirements are that the fan needs to be foolproof operation, IE it should not be possible to use the bathroom without the fan operating. A PIR with delayed start??
I do think that PIRs for indoor lighting is not a very good idea, particularly in places (like bathrooms) where sudden and unexpected disappearance loss of light could present a particular hazard. However, although others have mentioned it, I would personally not have a problem with the fan always been on when (and after) someone was in the room.

For the lighting, I don't want a switch outside or an LV pullcord inside. Maybe an SELV switching system? How would you do it?
Like most people, I'd probably do one of the two things you don't want to do. If you feel that you must avoid both those options, then I suppose that SELV switching would be one answer, but it does seem a bit OTT! As bernardgreen has recently written in another thread, I suppose that a pneumatically operated switch would be another possibility.

Kind Regards, John.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Back
Top