I am putting in a small cloakroom style toilet room with WC and basin. Extractor fan via kitchen to outside. Purge ventilation via hallway and front door. But, how can you provide trickle ventilation in this situation ? I guess an ensuite is similar, but I dont know if the same rules apply. Thanks, Simon.
sm_jamieson coughed up some electrons that declared:
Do you need to?
Yes. But its catered for simply by having a a 'leaky' door There is some building regs figure for vents in doors and suchlike that covers this case.
Only trying to cover all bases on the spec, since BCO was fussy last time about missing info.
Cheers, Simon.
The Natural Philosopher coughed up some electrons that declared:
Vents as opposed to the natural gap under the door? Personally I wasn't going to bother - the doors on mine will be leaky enough without any extra help.
Cheers
Tim
I had assumed gaps under doors would be sufficient. Its a bit weird with a toilet, as noise insulation regs and trickle vent regs are in conflict. I'll put some general statement on the spec as "blah blah will be provided", and then do nothing and see if BCO says anything. I wonder it trickle vent could be supplied via the extractor fan route. I reckon there would be some leakage there anyway, surely ? Simon.
Probably good enough then. I think the 'vents must be high' bollox doesn't apply to internal ventilation.
lets have a cometition for how many building resg are in conflict..
'lighst switches must be accessible to people in wheel chairs' 'light switches must be well out of reach of someone with a hand on a tap' 'Insulation must be to a U value well below the effecctive U value of te required air change ventilation'.
TBH leave a gap under the door, or punch a vent to outside.
sm snipped-for-privacy@hotmail.com coughed up some electrons that declared:
It's all getting rather gay.
Unless you and I manage to build hermetically sealed bulkhead doors and go to sleep on the bog for hours thus running out of oxygen, it seems like total nonsense.
As a matter of course I'm ignoring anything to do with noise reduction and most of the ventilation stuff, save for basic extraction in bathrooms and of course (gas/wood) burner related ventilation - that stuff *is* actually important.
Fortunately I don't think my BCO gives a stuff about that so I won;t bring it up and I doubt he'll ask.
Cheers
Tim
Judging my my door hanging skills, there will be a gap around the door anyway ;->
Simon.
Hah ! I had to do written calculations for purge ventilation and U values for my full plans. Thats the problem with full plans. I'm sure more is let slip on a building notice. Simon.
On Mon, 1 Jun 2009 12:04:17 -0700 (PDT), a certain chimpanzee, sm_jamieson randomly hit a keyboard and produced:
When you say, "extractor fan via kitchen", you do mean through a duct to the outside I hope? Similarly, purge ventilation has to be directly to the outside, not via a hall.
If you have a windowless WC, you need a 6 litres/sec fan to the outside with a 15 minute over-run.
Er no, that bit doesnt. If it means what I think it does.
Something along those lines, and that's just to meet regulations. Now when the cats crap in it...
On Tue, 02 Jun 2009 18:04:45 +0100, a certain chimpanzee, The Natural Philosopher randomly hit a keyboard and produced:
The only 'requirement' for light switches being out of reach of someone with their hand on a tap is in bathrooms. That gives a 'zone' of nn.nn metres in an arc around the tap. It's perfectly possible to have a light switch between 450mm-1200mm above the floor provided it's outside the 'zone'.
Eh? I presume you're refering to... Sorry, no, your sentence doesn't work in English.
I suspect you're disparaging what is referred to as, "build tight, ventilate right". The 'old' way of building meant that ventilation was provided by windows leaking, gaps between bricks & blocks, cracks in walls, floors and ceilings allowing air and heat through. None of this mattered as occupants needed to burn so much coal or gas to heat their thin solid walls that the small extra amount of energy needed to heat all the air leaking out was small by comparison.
Extractor via duct through kitchen, yes. Although I heard of an extractor fan through the kitchen window, into the conservatory ! Of course fan there before the conny was.
2 rooms can be taken together for purge ventilation if one does not have windows (just checked in the approved doc) So I can purge vent the toilet through the hall but perhaps not via 2 other rooms.Some fan with overrun yes. Don't think a tiny bog needs 15 min over- run in reality. How many air changes is that ? Simon.
On Wed, 3 Jun 2009 15:48:00 -0700 (PDT), a certain chimpanzee, sm snipped-for-privacy@hotmail.com randomly hit a keyboard and produced:
And no door between the two. How exhibitionist are you?
That's what it says in the AD, and if you want your plans passing, it's best to say that.
Most fans come with a variable timer, usually from one or two minutes to 20. Set it to 15 until the BCO signs off your work, then set it to whatever is needed to get rid of the smells.
Ha ha. I had thought of a single door that is a toilet door in one position and a kitchen door in the other !
Yep, I'll put that in the spec.
Cheers, Simon.
On Fri, 5 Jun 2009 01:31:36 -0700 (PDT), sm snipped-for-privacy@hotmail.com had this to say:
Like a 2-way switch sort of thing?
:-)
Yep ! Also I'd like a revolving door that fires you into one of 8 rooms surrounding it.
I just noticed in part F, purge vent is only required for habitable rooms, not including kitchens and bathrooms (for which extract provisions are sufficient). I think the overrun timer is the vital factor. Simon.
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