bathroom refurb

diyguy123 · 18 Jul 2019

i have one inline fan that is shared between two bathrooms with a pull cord switch in each one seperate from the light.

i would like to convert this to two seperate fans which are activated from the light switch which i would also like to move outside of the room to a normal switch instead of the ugly cords hanging down.

is it wise to reuse the inline fan and add a humidstat and time to the bathroom ceiling on the main bathroom as the vent is in zone one over the shower bath or convert both bathrooms to 12v fans or two inline fans ?

the existing fan is fed from a fused spur in the loft with two pull cords in each bathroom. i assume i can remove all of the wiring from the spur to the fan and two pull cords and conver the spur to two 3 poled fan switches and have a constant feed to the new fans and a switched live from each light switch to the new 3 poled spur which will be in the loft.

i find the inline fans quote noisey hence my interest in a 12v option or mains fed on the ceiling
i have a rcd in the fuse box but not sure if the whole house is protected as i know the bathroom needs to be rcd protected.

chivers67 · 18 Jul 2019

Well you can obviously move the switches outside if you wish, there are fans out there with built in timers and Humidity stats and you'e going to need to buy at least one. I personally would use 12v DC

diyguy123 · 18 Jul 2019

chivers67 said:
Well you can obviously move the switches outside if you wish, there are fans out there with built in timers and Humidity stats and you'e going to need to buy at least one. I personally would use 12v DC

considering that i was unable to find a 12v fan with a humidstat built into the fan so another box needs to be on the ceiling somewhere.

EFLImpudence · 18 Jul 2019

diyguy123 said:
i have one inline fan that is shared between two bathrooms with a pull cord switch in each one seperate from the light.
i would like to convert this to two seperate fans which are activated from the light switch which i would also like to move outside of the room to a normal switch instead of the ugly cords hanging down.

OK.

is it wise to reuse the inline fan and add a humidstat and time to the bathroom ceiling on the main bathroom

Up to you.
Humidistats are not very good in Britain.
Timer will be elsewhere - in fan or, for 12V in power supply.

as the vent is in zone one over the shower bath or convert both bathrooms to 12v fans or two inline fans ?

Zones only go up to 2.25m. from floor.
12V or 240V is not an issue - your choice.
I see no point in 12V.

the existing fan is fed from a fused spur in the loft with two pull cords in each bathroom. i assume i can remove all of the wiring from the spur to the fan and two pull cords

Yes.

and conver the spur to two 3 poled fan switches and have a constant feed to the new fans and a switched live from each light switch to the new 3 poled spur which will be in the loft.

Again - a separate issue. Whether you fit a 3-pole switch or not has nothing to do with the operation of the fan(s).

i find the inline fans quote noisey hence my interest in a 12v option or mains fed on the ceiling

I don't see how that will be quieter - unless they are just less powerful.

i have a rcd in the fuse box but not sure if the whole house is protected as i know the bathroom needs to be rcd protected.

As long as an RCD covers the lighting/fan circuit, that is alright.

diyguy123 · 18 Jul 2019

well i wanted to fit the 3 pole switches to keep the installation up to legal standards.

maybe two of these would be best keeps the wiring down and the fan will always come on whether the light is switched on or not when having a shower.

https://www.amazon.co.uk/Silenta-Kitchen-Bathroom-Shower-Extractor/dp/B005KJ49BC

JohnD · 18 Jul 2019

diyguy123 said:
i find the inline fans quote noisey

Which ones have you listened to?

Cheap rubbish

https://www.screwfix.com/p/manrose-shower-light-extractor-fan-kit-chrome-100mm/25652

extraction Rate 85m³/hr
Noise Level 41dBA at 3m
Adjustable Timer: Max. 20min

Or modern, good quality?

https://www.tlc-direct.co.uk/Products/SLTD250.html
Speed 1 250m3/hr - 1880rpm
Speed 2 185m3/hr - 1475rpm -
Max Watts = 24 watts
Sound Pressure level at 3m = 31dB(A)

Observe that the cheap one is not only noisier, it has about one-third the power of the good one.

This one https://www.tlc-direct.co.uk/Products/SLTD160T.html is even quieter, but has only (!) twice the power of the cheap one.
160m3/hr - 2500rpm -
Max Watts = 20 watts
Sound Pressure level at 3m = 24dB(A)

diyguy123 · 18 Jul 2019

i have one of these

https://www.cataindia.in/products/ventilation/ductin-ine-smt-150/

if i install two of these i believe no switched live is needed either so just a connection to the fused spur
simplifies things.

https://www.amazon.co.uk/Silenta-Ki...ement+sensor+fan&qid=1563450938&s=diy&sr=1-67

JohnD · 18 Jul 2019

Are you in India?

It quotes 595 cu.m/hr so I imagine there will be noise of air rushing thehough the grills and ducts.

diyguy123 · 18 Jul 2019

JohnD said:
Are you in India?

no thats all i could find for the model

cata smt-150

JohnW2 · 18 Jul 2019

diyguy123 said:
well i wanted to fit the 3 pole switches to keep the installation up to legal standards.

There are no legal requirements for you to have 3-pole switches/isolators.

Kind Regards, John

diyguy123 · 19 Jul 2019

JohnW2 said:
There are no legal requirements for you to have 3-pole switches/isolators.

Kind Regards, John

cheers

looks like the pir fans just need power and nothing else so decided to get two of those straight swap.

diyguy123 · 26 Jul 2019

EFLImpudence said:
OK.

Zones only go up to 2.25m. from floor.
12V or 240V is not an issue - your choice.
I see no point in 12V.

the fans i purchased thinking they where ip44 are actually ip 34 fans
are they still safe to use this diagram seem to conflict to what has been said regarding zone 2 above a shower bath on the ceiling

JohnD · 26 Jul 2019

your picture is wrong.

Apart from that, how high above floor level is the ceiling where you are going to put the fan?

Incidentally, why don't you put the fan above the ceiling, which would be better?

diyguy123 · 26 Jul 2019

JohnD said:
your picture is wrong.

Apart from that, how high above floor level is the ceiling where you are going to put the fan?

Incidentally, why don't you put the fan above the ceiling, which would be better?

from floor ceiling 252cm

JohnD · 27 Jul 2019

So it is above the zones.

diynot

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bathroom refurb

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