bathroom refurb

Discussion in 'Electrics UK' started by diyguy123, 18 Jul 2019.

  1. diyguy123

    diyguy123

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    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.
     
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  3. chivers67

    chivers67

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    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
     
  4. diyguy123

    diyguy123

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    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.
     
  5. EFLImpudence

    EFLImpudence

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    OK.

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

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

    Yes.

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

    As long as an RCD covers the lighting/fan circuit, that is alright.
     
  6. diyguy123

    diyguy123

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    Last edited by a moderator: 18 Jul 2019
  7. JohnD

    JohnD

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    Which ones have you listened to?

    Cheap rubbish

    [​IMG]
    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?

    [​IMG]
    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)
     
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  8. diyguy123

    diyguy123

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    Last edited by a moderator: 18 Jul 2019
  9. JohnD

    JohnD

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    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.
     
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  11. diyguy123

    diyguy123

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    no thats all i could find for the model

    cata smt-150
     
  12. JohnW2

    JohnW2

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

    Kind Regards, John
     
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  13. diyguy123

    diyguy123

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    cheers

    looks like the pir fans just need power and nothing else so decided to get two of those straight swap.
     
  14. diyguy123

    diyguy123

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    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

    [​IMG]
     
  15. JohnD

    JohnD

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    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?
     
  16. diyguy123

    diyguy123

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    from floor ceiling 252cm
     
  17. JohnD

    JohnD

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    So it is above the zones.
     
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