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Chat Area => General Discussion Area => Topic started by: Gaffers on 28 November 2018, 15:05:42

Title: Extractor fan wiring
Post by: Gaffers on 28 November 2018, 15:05:42
Seeing as there are some exitable responses on the other electric advice thread I thought I would throw my question in to the hat for your amusement/vitriol/candour :D

I have an in-line ceiling extractor fan wired in to the bathroom.  It's a 21/33W 100mm fan wired up in timer mode on a 3 pole throw switch.  The house is 5 years old so I assume the sparky that installed the house electrics did so to Part P.

I would like to add a second fan because I like extremely hot showers followed by the Army tradition of wet-shaving which requires the use of a mirror.  This is often steamed up so I am exploring the addition of a second additional fan.  I will obviously need a vent on the door to allow the extra air in to replace that which is sucked out but my question is this.  Can I simply wire it in in parallel, i.e. similar to a spur wiring on a socket?  I will acquire an identical fan and wire it the same but not sure on the legalities of this.
Title: Re: Extractor fan wiring
Post by: dave the builder on 28 November 2018, 15:24:09
In my professional opinion .....

you should leave well alone and just grow a beard and take cold showers :y

get a better fan ,suitably IP rated, trim the bottom of the door so the gap allows decent air flow in (rather than fit a vent ,which would look pants )
again, call in a professional (bathroom is special location) if you are not 100% sure 



Title: Re: Extractor fan wiring
Post by: Bigron on 28 November 2018, 15:26:24
An alternative solution to your steaming problem could be a heated mirror, often incorporating a cabinet behind it as a bonus storage space.
No link for you, but a quick look on ebay might help.

Ron.
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 15:28:28
Does anyone know how to wire a heated mirror in?  ;D
Title: Re: Extractor fan wiring
Post by: dave the builder on 28 November 2018, 15:39:23
Does anyone know how to wire a heated mirror in?  ;D
again, call in a professional (bathroom is special location) new circuit ,possibly in zone 2, building control notifiable    :y
Title: Re: Extractor fan wiring
Post by: Kevin Wood on 28 November 2018, 15:44:07
An alternative solution to your steaming problem could be a heated mirror, often incorporating... to open the window.

FTFY. :y
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 15:44:32
Does anyone know how to wire a heated mirror in?  ;D
again, call in a professional (bathroom is special location) new circuit ,possibly in zone 2, building control notifiable    :y
It was a jest, Dave. Wire a heated mirror to save you wiring an extractor fan. Get it? Never mind.  :-X
Title: Re: Extractor fan wiring
Post by: Lizzie Zoom on 28 November 2018, 15:47:21
I have just had a new extractor fitted by an electrical contractor hired by our housing association.

It is an envirovent filterless infinity Fan SELV and is brilliant, and British made.

It runs slowly all the time in a trickle mode, then increases steadily, automatically, as the humidity in the bathroom increases.  Once the humidity is down to normal levels, it goes back to a steady trickle of extraction.  It uses 50 times less power than a 100w light bulb, equalling £2.41 per year (at average cost of electric) on trickle, and this increases to just £3.18 per year when on boost mode for 2 hours, and trickle for 22 hours, per day.

Our local Borough Council is also fitting them in their properties. ;)
Title: Re: Extractor fan wiring
Post by: dave the builder on 28 November 2018, 15:53:53
Does anyone know how to wire a heated mirror in?  ;D
again, call in a professional (bathroom is special location) new circuit ,possibly in zone 2, building control notifiable    :y
It was a jest, Dave. Wire a heated mirror to save you wiring an extractor fan. Get it? Never mind.  :-X

 :D ;D
I know, but this is the internet
without clarification , someone might think a heated mirror a loophole solution to steam in a bathroom that does not require correct installation and documentation or expense of a sparky  :P
opening a window  ,as Mr Wood kindly suggested is one solution
but the burglars would steal your shower gel  :(
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 15:56:15
I have just had a new extractor fitted by an electrical contractor hired by our housing association.

It is an envirovent filterless infinity Fan SELV and is brilliant, and British made.

It runs slowly all the time in a trickle mode, then increases steadily, automatically, as the humidity in the bathroom increases.  Once the humidity is down to normal levels, it goes back to a steady trickle of extraction.  It uses 50 times less power than a 100w light bulb, equalling £2.41 per year (at average cost of electric) on trickle, and this increases to just £3.18 per year when on boost mode for 2 hours, and trickle for 22 hours, per day.

Our local Borough Council is also fitting them in their properties. ;)
That would be about 2w, according to my calculations.  ;D
Title: Re: Extractor fan wiring
Post by: Gaffers on 28 November 2018, 16:01:57
An alternative solution to your steaming problem could be a heated mirror, often incorporating... to open the window.

FTFY. :y

I find that can make the situation worse, especially if it is cold outside.
Title: Re: Extractor fan wiring
Post by: Gaffers on 28 November 2018, 16:03:47
An alternative solution to your steaming problem could be a heated mirror, often incorporating a cabinet behind it as a bonus storage space.
No link for you, but a quick look on ebay might help.

Ron.

I would love one but as Dave says the sparky work involed would likely be significant and I am a tight Yorkshireman at heart.

It's on the list for the mansion house in the US ;)
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 16:04:18
An alternative solution to your steaming problem could be a heated mirror, often incorporating... to open the window.

FTFY. :y

I find that can make the situation worse, especially if it is cold outside.
Now that the central heating is on, we should try and humidify the house. Leave the bathroom door open. Easy Peasy.  ;D
Title: Re: Extractor fan wiring
Post by: dave the builder on 28 November 2018, 16:09:22
An alternative solution to your steaming problem could be a heated mirror, often incorporating... to open the window.

FTFY. :y

I find that can make the situation worse, especially if it is cold outside.
Now that the central heating is on, we should try and humidify the house. Leave the bathroom door open. Easy Peasy.  ;D
:o heating on  :o
you know that costs money  :-\
is the snow that deep further up north  ;D
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 16:12:42
An alternative solution to your steaming problem could be a heated mirror, often incorporating... to open the window.

FTFY. :y

I find that can make the situation worse, especially if it is cold outside.
Now that the central heating is on, we should try and humidify the house. Leave the bathroom door open. Easy Peasy.  ;D
:o heating on  :o
you know that costs money  :-\
is the snow that deep further up north  ;D
Another one of my quirks. Thermostat set to 22, left on all year. When it's warm, heating off, when it's cold, heating on. Works for me.
Title: Re: Extractor fan wiring
Post by: Lizzie Zoom on 28 November 2018, 16:18:12
I have just had a new extractor fitted by an electrical contractor hired by our housing association.

It is an envirovent filterless infinity Fan SELV and is brilliant, and British made.

It runs slowly all the time in a trickle mode, then increases steadily, automatically, as the humidity in the bathroom increases.  Once the humidity is down to normal levels, it goes back to a steady trickle of extraction.  It uses 50 times less power than a 100w light bulb, equalling £2.41 per year (at average cost of electric) on trickle, and this increases to just £3.18 per year when on boost mode for 2 hours, and trickle for 22 hours, per day.

Our local Borough Council is also fitting them in their properties. ;)
That would be about 2w, according to my calculations.  ;D

Give that man a coconut! :y

That is exactly what envirovent state in their installation guide ;)
Title: Re: Extractor fan wiring
Post by: Gaffers on 28 November 2018, 16:24:00
Heating?!!   Eee by gum!  It's only November.  The heating is only on for a few weeks every winter when it gets proper cold.  Positive outside temperatures are not cold in the house.
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 16:24:36
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)
Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 16:25:40
Heating?!!   Eee by gum!  It's only November.  The heating is only on for a few weeks every winter when it gets proper cold.  Positive outside temperatures are not cold in the house.
Ask Rog about stone built houses. Ours is only stone at the front and is still cold in July.
Title: Re: Extractor fan wiring
Post by: Gaffers on 28 November 2018, 16:29:00
Heating?!!   Eee by gum!  It's only November.  The heating is only on for a few weeks every winter when it gets proper cold.  Positive outside temperatures are not cold in the house.
Ask Rog about stone built houses. Ours is only stone at the front and is still cold in July.

New build.  Lots of insulation to the point it is was unbareable this past summer and the fridge freezer was working it's whatsits off trying to keep cool.  If we have anouther summer like that I may need to fit external window shutters.
Title: Re: Extractor fan wiring
Post by: Lizzie Zoom on 28 November 2018, 18:14:10
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)

Title: Re: Extractor fan wiring
Post by: STEMO on 28 November 2018, 19:13:53
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)
Methinks I got a decimal point in the wrong place. It is, indeed, 17.5 KWh per annum.

But.......I think you'll find you pay 16.75p per KWh, not £16.75.  ;D
Title: Re: Extractor fan wiring
Post by: Doctor Gollum on 28 November 2018, 23:25:35
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)
Methinks I got a decimal point in the wrong place. It is, indeed, 17.5 KWh per annum.

But.......I think you'll find you pay 16.75p per KWh, not £16.75.  ;D
Perhaps not at the moment, but just you wait until next April  ::)
Title: Re: Extractor fan wiring
Post by: Marks DTM Calib on 29 November 2018, 07:44:51
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)
Methinks I got a decimal point in the wrong place. It is, indeed, 17.5 KWh per annum.

But.......I think you'll find you pay 16.75p per KWh, not £16.75.  ;D
Perhaps not at the moment, but just you wait until next April  ::)

Is that when they put a customs check point on the France-Uk Inter-connectors?
Title: Re: Extractor fan wiring
Post by: Sir Tigger KC on 29 November 2018, 09:23:23
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)
Methinks I got a decimal point in the wrong place. It is, indeed, 17.5 KWh per annum.

But.......I think you'll find you pay 16.75p per KWh, not £16.75.  ;D
Perhaps not at the moment, but just you wait until next April  ::)

Is that when they put a blockade on the France-Uk Inter-connectors?


FTFY Mr DTM.  ;)
Title: Re: Extractor fan wiring
Post by: Lizzie Zoom on 29 November 2018, 11:32:44
Yes..but the £2.41pa is bollix. 2w per hour is 1.752Kwh per annum, or about 50p. They can't possibly know how many baths/showers you will take in a year and, therefore, how often it will be running at a higher speed.
Probably still very cheap, but I'm a pedantic bastard.  :)

eh? ::)

2w x 24 hours  = 0.05 Kilowatts hours used per day = 0.80p per day = 17.52 KWh's for year = £2.93 (at the highest cost for me of  £16.75 per kWh;)  ;)
Methinks I got a decimal point in the wrong place. It is, indeed, 17.5 KWh per annum.

But.......I think you'll find you pay 16.75p per KWh, not £16.75.  ;D

Bloody £ sign gets everywhere! ;D ;D ;D ;)
Title: Re: Extractor fan wiring
Post by: dave the builder on 29 November 2018, 11:43:03
Stick with your expensive electric LizzIe
that cheap electric don't brown the toast properly  :y
Title: Re: Extractor fan wiring
Post by: Lizzie Zoom on 29 November 2018, 13:20:41
Stick with your expensive electric LizzIe
that cheap electric don't brown the toast properly  :y

 ;D ;D :y
Title: Re: Extractor fan wiring
Post by: Gaffers on 29 November 2018, 13:36:29
Does the french lecky give toast a whiff of garlic and a penchant for horsemeat?
Title: Re: Extractor fan wiring
Post by: dave the builder on 29 November 2018, 16:47:47
Does the french lecky give toast a whiff of garlic and a penchant for horsemeat?
If they wire their houses any where near as bad as their cars  ::)
I imagine they do toast round an open fire  ;D
Title: Re: Extractor fan wiring
Post by: Gaffers on 29 November 2018, 18:45:25
Funny ypu should mention that, as i have first hand experience from when i was a homeowner in the suburbs of Paris.

1950s house with 0.75mm thick copper sheathed with fabric. No plastic or rubber insulation.  The disco lights in the main house and sparks flying from the fuse box in the basement made me curious so i broke in to a wall to investigate.  It took a lot to sort the whole house out.  Thing is that for months i was running a couple of PCs upstairs without issue but it was the kettle in the kitchen downstairs  on the same linear curcuit (no ring) that did it.  Squeaky bum moment for sure.
Title: Re: Extractor fan wiring
Post by: Rods2 on 30 November 2018, 00:55:40
In my house in France, some of the wiring for lights are still the rubber covered in cloth wires run in metal conduit. All of the mains sockets I have replaced with new wiring & sockets. Continental plumbing is generally better than the UK but the converse applies to their Micky Mouse electrical systems, switches & sockets, where the UK system is much better and safer. Older system is Europe still only use two pins as the earth pin for sockets is a more recent afterthought. :o :o :o

Cheap horrible aluminium cable is common in Eastern Europe and adding a socket with an earth pin, why would I want to spend money on that? :o :o :o Aluminium is much more brittle than copper and prone to breaking and its expansion & contraction much higher. Very cold winters, loose connections & multi-kw electric fires, what could possibly go wrong? Apart from that bit more heat than planned. :-X :-X :-X I'm sure TB would approve of such unexpected and unapproved heating plans as they like that sort of thing in middle-earth Britain. ::) ::) ::)