Inline bathroom duct fan for two bathrooms, and two switches...

uksparks · Sep 26, 2013

Hi,

I have just been round to a customers house who said he would like to replace his ceiling fans in his normal bathroom and also the ensuite with a new one as I am about to do his bathroom lights etc...

Anyway, I said you could go for an inline duct fan in the loft so its quieter which I've fitted many before, but I was wondering about using one fan for two bathrooms with two switches.

If I connected the switch live from the bathroom light to the fan as normal that will work, but if I took another switch live from another I would end up in the situation where power is going to the other light fitting when I didn't want it to.

Does anyone know of a unit that would allow dual control or a better way of doing it other than putting two fans in?

Thanks.

Richard Burns · Sep 26, 2013

Use double pole switches so that the lights use one pole and the fan the other, then when you switch the local switch, the lights and fan come on but the lights in the other room will not. Make sure the lights / fan are both on the same circuit!

Guest55 · Sep 27, 2013

have you noticed how much of a faff its become these days to fit a simple light & fan in a bathroom ?
triple pole this , double pole that , fused down fan the other ?
bunch of modern day crap really lol.

Octopus · Sep 27, 2013

I'd put in 2 fans - far, far better in the long run.

D Skelton · Sep 27, 2013

Probably just as cheap to buy and fit another in line fan as it would be to buy an adaptable box, a couple of relays, a Y split and a couple of in line back draft vents.

Richard Burns · Sep 27, 2013

Hmm, yes, I did miss the "better way of doing it" part!

Rockingit · Sep 27, 2013

I've had this before on whole-house ventilation units, where several bathrooms on different ccts have need to put it into boost mode. Just take a normal switch line from the bathroom up to a contactor coil (one per cct) then just gang a S/L over however many contactors you end up with.