Extractor fan – Is a re-wire change to change timer duration?

[Toonlad]

This was an installation of a brand new en-suite which included new lights and "Xplelair Inline Extractor Fan with Timer". The functionality we now have is not in line with the quotation. So if the electrician has wired it up in way in which the timer does not work, is this our fault? We don't see why we should pay for this to be rectified. This has only come to light as immediately after fitting we asked for timer to be adjusted.

Sounds like hes lashed in a twin, and ran away.

Few other things to ponder,,

Fan isolation switch,is the fan protected by a fuse or does it have thermal cutout on it, where you issued a certificate for your electrical work done lights and fan, are your lights compliant to the bathroom zones.

Not trying to make a mountain out of it, but these things need to to be looked into, by any electrician worth his salt.

 

[BrianDB9]

Not wanting to be funny but why would you specify the ventilation - are you a ventilation expert - only jesting ...... it seems easy until you know the truth !

The link is to an Axial fan - i hope there isn't too much ducting as it may not perform if too much.

There are a lot of different things to take into account in selecting the best ventilation solution, you could see Energy Savings trust web site, or study the downloadable Domestic Ventilation Compliance Guide along with Part F of the Building Regulations.

It sounds like you've got a system 1 type installation, For these systems " when installing a fan within a bathroom or wc with no openable window the fan should have a 15 minute over run " and " in rooms with no natural light, the fan should be controlled by the operation of the main light switch within the room."

Is your bathroom door undercut by 10mm above carpet or other finish ?

Has the room got a window ?

Flexi duct used or rigid ?

Generally point of extract should be as far from the internal door as possible to achieve best ventilation, however that may mean you get a short circuit to a window background ventilator (if fitted) or you may just go for above the shower ?

All that said i am teasing a bit - ventilation on new build is now a controlled service and when you see how many installations are actually poorly installed you can see why. How many electricians have an air flow meter to ensure the fan performs ?

PM me with as much detail about job inc sketch of room layout etc and i can provide best solution.

 

[markythesparky]

Not wanting to be funny but why would you specify the ventilation - are you a ventilation expert - only jesting ...... it seems easy until you know the truth !

The link is to an Axial fan - i hope there isn't too much ducting as it may not perform if too much.

There are a lot of different things to take into account in selecting the best ventilation solution, you could see Energy Savings trust web site, or study the downloadable Domestic Ventilation Compliance Guide along with Part F of the Building Regulations.

It sounds like you've got a system 1 type installation, For these systems " when installing a fan within a bathroom or wc with no openable window the fan should " and " in rooms with no natural light, the fan should be controlled by the operation of the main light switch within the room."

Is your bathroom door undercut by 10mm above carpet or other finish ?

Has the room got a window ?

Flexi duct used or rigid ?

Generally point of extract should be as far from the internal door as possible to achieve best ventilation, however that may mean you get a short circuit to a window background ventilator (if fitted) or you may just go for above the shower ?

All that said i am teasing a bit - ventilation on new build is now a controlled service and when you see how many installations are actually poorly installed you can see why. How many electricians have an air flow meter to ensure the fan performs ?

PM me with as much detail about job inc sketch of room layout etc and i can provide best solution.

Bloody hell!!
It's Friday you know! Go grab a pint and relax!

 

[Toonlad]

drinking and typeing --- hes relaxed because hes teasing a bit.

 

[robinsmith30]

Thank you for all the responses. I have a couple of final questions to help clarify my understanding 1) Can a fan with a timer be set to a time of 0 and 2) When installing a fan with a timer, is the wiring the same regardless of the timing being set to 0 or maximum. We are awaiting our certificates for the work. I will check on the matters raised by Toonlad in due course.

 

[telectrix]

yep, friday night, well after beeer o'clock. too much info. chill. take a pill. have a dump and measure your fan's extraction rate. zebedee says time for bed.

 

[BrianDB9]

Bloody hell!!
It's Friday you know! Go grab a pint and relax!

cheers just had to get freakin g n t (yuk) nowt else in as snowed in lol

 

[robinsmith30]

I had a good beer. Thanks for all the good responses guys!

 

[telectrix]

if it's a bathroom with attic above, it's not a mega job to sort. just a cable or 2, a plumber with a half a brain could do it ( if you can find a plumber with half a brain that is.)

 

[markythesparky]

Extractor fan – Is a re-wire change to change timer duration?

Never seems timer fan that could be set to 0.

If you could it would be the same wiring, yes. You would still need a three core and earth cable.

 

[markythesparky]

Extractor fan – Is a re-wire change to change timer duration?

Sorry too much beer!

'Never seen' not 'never seems'.

 

[Richard Burns]

Thank you for all the responses. I have a couple of final questions to help clarify my understanding 1) Can a fan with a timer be set to a time of 0 and 2) When installing a fan with a timer, is the wiring the same regardless of the timing being set to 0 or maximum. We are awaiting our certificates for the work. I will check on the matters raised by Toonlad in due course.

Usual minimum time on a timer fan is about 2 mins, recommended overrun time is 15 mins.

Once the wiring is in place for a timer then there is no difference in the wiring no matter how long you set the timer.

If the fan has its own isolator then the fan can be isolated and then switched on again and the fan will usually stop, handy for the midnight trips to the bathroom without waking any one up, but of course not regulatoraly recommended:smile5:!

 

[Octopus]

Usual minimum time on a timer fan is about 2 mins, recommended overrun time is 15 mins.

Once the wiring is in place for a timer then there is no difference in the wiring no matter how long you set the timer.

If the fan has its own isolator then the fan can be isolated and then switched on again and the fan will usually stop, handy for the midnight trips to the bathroom without waking any one up, but of course not regulatoraly recommended:smile5:!

A good point is raised here, so to the OP, is a 3A fuse fitted and/or is there double pole isolation installed?

 

[Des 56]

If its all tiled in and decorated etc and he only has 2 cores to the fan,perhaps he may be able to fit a transformer (with timer) and swap the fan for a 12 volt

 

[HandySparks]

If its all tiled in and decorated etc and he only has 2 cores to the fan,perhaps he may be able to fit a transformer (with timer) and swap the fan for a 12 volt

No need to change the fan. Just fit a separate timer. Remote Timer 1min to 45 Min