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

 

[Andy78]

I happily fit 230V fans in zone 1 where it is asked for or there is no option, usually to the protest and confusion of plumbers who know my job better than me.

If 230V was desired to be avoided, I would sooner fit a 230V inline fan in the roof void where possible rather than fit ELV.

 

[Dave OCD]

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.

Sorry Richard [and Des] , I worded my post badly. I'm aware that the regs permit this but don't like putting a mains voltage fan directly above a bath or shower. Probably a bit silly on my part when you think of the mains voltage [and high current drawn] in an electric shower.

 

[AdamSmith86]

I am going for a 12v fan as the tenants don't strike me as the type of people who have much of a sense of self preservation... They probably have cash4claims on speed dial so don't fancy leaving 240v at arms reach for them. They have previously taken a ladle or other large kitchen utensil to smash the smoke alarms off the ceiling. Imagine doing that when they are all lathered up and super conductive!

 

[Midwest]

Sorry Richard [and Des] , I worded my post badly. I'm aware that the regs permit this but don't like putting a mains voltage fan directly above a bath or shower. Probably a bit silly on my part when you think of the mains voltage [and high current drawn] in an electric shower.

Concur with Dave, no rational reason.

My irrational morbid fear isn't helped any by manufacturers statements;

- Vent-Axia still recommends that any fans installed within Zones 1 and 2 should be SELV (Safety Extra Low Voltage

- Xpelair LV100 12V Safety Extra Low Voltage (SELV) fans offer complete peace of mind as they are specifically designed to be
installed directly in or over the splash area zone 1 in complete safety

- Manrose range of 12 volt S.E.L.V. (Safety Extra Low Voltage) fans are specifically designed for the safe ventilation of toilets, bathrooms and shower rooms and can be fitted within the splash area with absolutely no risk of
electric shock.

All (I think) Shower Light fans are selv?

However, I think it's time I manned up, and faced these nonsensical fears, put them behind me and start installing IPX4 fans in zones 1 & 2 as recommended by 701.512.2

 

[Dave OCD]

No go with what you're comfortable with Midwest, not all 230v fans are rated IPX4 and there's nothing wrong with improving on the minimum requirements stated in BS7671.
It's fine to fit a mains incoming LED downlighter above a shower though, I often do but make sure it's 1P65 and fed via an RCD.