bathroom extractor fan

[what..the?]

I am having the run around with my electrician who is part of the big build project and is employed by the contractor i have chosen so I can't fire him.

I have a bathroom/shower room where I want an extractor in a certain place, before he put it above a heated towel rail and said I would not loose the heat from the fan. He insisted I could not have it over the other side of the room he is now moving it down that end!! But now says it can't be a high voltage one I want, but the max he could fit is 100 Lt fan. So my question is how strong is a 100Lt fan as the room is quite large.

But I still want the large sized high capacity version. I looked online for information on zoning, I measured and found that there was a area which had no zone so was neither 0,1,2 zone but he is not excepting it!! He was even mocking the print off and the pictures off the website (which has nothing to do with fans and zoning) as a way of disallowing the information, and then he was quite threatening.

I would be very grateful for any help on this. and your views on a 100 Lt fan.

[what..the?]

p.s I like high capacity fans because I have a mould allergy...

[The Builder]

http://www.allupandon...ng-zones-diagram.html

Only SELV (separated extra low voltage)(12v with transformer) allowed in zones 0,1, and 2.

Outside zones (used to be called zone 3) 230v allowed.

Outside the zones, you could fit a sodding great industrial Ventaxia that would take your wig off ................. if you wanted to ;o)
I'll bet he's worrying about current load. Shower fans are often fed from the lighting circuit. A big fan might have to be fed from its own supply, or from a spur off the ring main (sockets) circuit.

I'm off to check capacities ........... back later.

[what..the?]

thanks I am measuring off the floor level from the corner on the bath up 225cm, above this there is no zone. if it was to be under 225cm i would have to go 0.6m sideways to get into a no zone area. As I have high ceilings I have room above 225cm. There is a slight issue with it being next to a window lintel but I have had to guess the length of the lintel as the builder won't tell me it's size. I should still have room.

[The Builder]

A regular bathroom fan (4" or 100mm) has the capacity to move approx 23 litres per second.
a 100L fan (possibly 6"") would be equivalent to at least four of those. Should be fine on a lighting circuit.

[what..the?]

your link regards zoning is for lighting have you got another one for extractors?

[The Builder]

No zone above 2.25m. Yes that's right. No restriction. Either above the lintel, or, better still, ceiling mounted.......... ducted to outside in the ceiling void above the ceiling........ or through the roof.

[what..the?]

but if I can have high capacity I dont want the run about you know, I keep finding some diagrams show anything above 225cm anywhere even above the bath from floor level is fine and some say 225cm off the bath corner?

[The Builder]

Same zones apply Mrs What.

[The Builder]

I'm looking here, at the 17th edition "On-site guide" ....... the electricians mini bible. 2.25m from the floor.

[what..the?]

http://www.fantronix...._Zones_Explained.html

Well you can see on this one it says 225cm above the bath is still zone 2 other sites say above 225cm above bath is no zone??

[what..the?]

so the bible say 225 from floor is no zone? What even above the bath?

[what..the?]

http://blog.sparksdirect.co.uk/tag/ip-zoning/

this web page has two completely conflicting diagrams??

[The Builder]

No wonder electricians get confused .......... that is just plain wrong! Above 2.25m is outside the zones.

Give me a minute and I'll post the diagram from the On-site Guide.

[what..the?]

thanks

[The Builder]

Definitely from floor level to a height of 2.25m. Above that, outside zones.

Having trouble with printer scanning at the moment. It's having a moan about drivers ......... must be because I used a webcam yesterday. I'll be back later when I've fixed it, Mrs What .............. with a link to the copy.

[what..the?]

http://www.diynot.com...ewtopic.php?p=1974391

been reading through this and still lost...lol

[The Builder]

Fixed the printer ............... these are the pages from the official onsite guide

http://s431.photobuck...view¤t=text.jpg
http://s431.photobuck...iew¤t=zones.jpg

You'll see that outside the zones, no special requirements.

That "diynot" link ................. they can't even agree amongst themselves, when it's so blindingly obvious.
The problem arises when some electricians either don't go on an upgrade course, and just pick up odds and ends of misinformation. All I can tell you is that I did the DISQ (domestic installer scheme qualification). It's what I was taught. I'm no electrician............ just a Domestic Installer, but at least we had to learn the latest regs.

[BRIGHT SPARK]

If the ceiling is more than 2.25m from the FLOOR then the fan will be outside the BS 7671 zoning requirements.That said if you have a decent size bathroom then fit a 4" or 6"duct fan.If you have a loft or a void above, the fan motor is installed there and ducted from the bathroom through the fan to the outside.These ducts can be installed in zone 1 or 2 because there is no possibility of indirect contact with the motor.

[The Builder]

Hurrayyyyyyyyyyyyyyyyyyyyyyy

I was just going to put out a call for you, Your Brightness ............ it must do your head in sometimes ;o)

[what..the?]

I cannot duct out above due to a loft conversion.

I have a wall higher than 225 not by a huge amount but enough for a fan from 225 and then a gap before the ceiling kicks in.

The builder - your drawings do confirm the 225 no zone don't they, but I am worried about kicking the guy up the ass to look like a prat when he proves me wrong.