Xpelair 12v humidistat fan

[AdamSmith86]

Hello all,

I am looking to install an xpelair 12v fan in a bathroom with a humidity sensor (model no. 92970AW). I can't quite work out from the instruction manual whether the humidity sensor is in the fan itself or in the transformer. due to the size of the bathroom and the position of the bath it is necessary to mount the transformer outside the bathroom where a transformer mounted humidity sensor won't be of much use! So if anyone has installed one of these before I would grateful if you could let me know where the sensor resides.

Also on the subject, I am providing a dedicated circuit protected by RCD for the fan which I'll run to a 3a fused spur outside the bathroom. Is an isolator required in this case? I only ask as the tenants aren't the type you'll see polishing their doorstep and in my experience of working in less than savoury households, the fan iso's are more often than not switched off. Would an unswitched fused spur be satisfactory?

Regards

 

[AdamSmith86]

Or of course no FCU at all if the manufacturer does not specify one?

 

[Richard Burns]

The humidity sensor is mounted in the fan, there will be a small grille on the fan behind which is the sensor.
Most fan instructions require a DP isolator with minimum 5mm opening gap, this function would be provided by the RCD. Therefore a fused spur would be acceptable.
The other common recommendation is a triple pole isolator so that the fan can be worked on safely, however this function can also be covered by the RCD.
Some fan manufacturers do not require a local 3A (or 1A) fuse, I cannot remember for xpelair, I think they say you can use a lighting circuit, so so long as the MCB is 6A then you would be OK, but do check the instructions.

 

[AdamSmith86]

Great, thanks Richard.

 

[Octopus]

Are you sure you want to complicate matters using a 12v unit?

 

[AdamSmith86]

Yes I do.

 

[Octopus]

Why ???

 

[westward10]

It will work from a car battery in a power cut, obviously.

 

[darksideby182]

Dont worry re read it

 

[Rpa07]

Uh?!

 

[Midwest]

Dunno, I'm more inclined to fit extra low voltage extractor fan above shower head (including bath with additional shower head) rather than low voltage regardless of zones etc, but I'm willing to be convinced otherwise?

 

[westward10]

Dunno, I'm more inclined to fit extra low voltage extractor fan above shower head (including bath with additional shower head) rather than low voltage regardless of zones etc, but I'm willing to be convinced otherwise?

Why is this.

 

[Dave OCD]

Surely a mains voltage fan is only suited to Zone 2 at best and the OP wants to mount his fan in Zone 1 ?

 

[Richard Burns]

Surely a mains voltage fan is only suited to Zone 2 at best and the OP wants to mount his fan in Zone 1 ?

An IPX4 fan at 230V can be used in zone 1, it is one of the list of 230V items that can be be installed as fixed permanently connected equipment.

 

[Des 56]

Surely a mains voltage fan is only suited to Zone 2 at best and the OP wants to mount his fan in Zone 1 ?

What makes you state this Dave,is it belief that they are not permitted or personal preference?

Edit
Bit late with the question for you Dave, Richard has let the cat out of the bag