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flueing standards
Discuss flueing standards in the Plumbing Jobs | The Job-board area at PlumbersForums.net
R
Rickster123
300mm from the opening in the building. So edge of brickwork.
K
kirkgas
No it's 300mm to the open point of the window where the fumes could get in, it's 150mm to the fabric opening in a building, ie where the window frame is sealed to the brick ( as the seal could be burst allowing POC's in)
E
Ermintrude
Sash so up and down yes?? If so that's an epic fail. If products of combustion re entering its ID. . GIUSP has clear guide on this .
A diagram or photo may help.
A diagram or photo may help.
K
kirkgas
If the window is openable the 300mm is to the point where the window parts from the frame when it is open, if it's a fixed window you are looking at 150mm from the flue to the nearest part of the frame where is is fitted to the brickwork (which is called a fabric opening, ie window or door frame etc)
K
kirkgas
You are confusing the issue,
First things first it doesn't matter if the window is open or shut, the criteria is "can the window be opened or is it a dead light"
If it can be opened the flue must be more than 300mm from the opening, if it is dead light the flue must be 150mm from the fabric opening which is where the frame joins the brickwork, however just to throw a spanner in the works, the measurement should be taken from the edge of the flue, not the air intake pipe
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The flue is parallel with the wall the window is in?
And the opening sash gets closer to the flue when it's opened?
If so the flue always stays 300mm from the opening in the fabric of the building, just the sash moves closer.
kirk, do you happen to know where this is outlined in writing? I have alway said it is from the exhaust of the flue where others have argued it is from the intake. I'm sure I have seen it mentioned though that the window should be measured from the fabric opening although I don't agree with it myself, something to do with the window being replaced and the dimensions changing.
Would be good to get some clear clarification on this.
It's not the window itself that is a cause for concern, it's the opening that is created by opening the window. That said if the window opens and gets closer to the flue the window must either open out past 90 degrees, or they are on opposing walls, which is a bigger concern if the latter.
its from the outside of the flue (air intake) unless the manufacturer allows it to be closer when its plumed away. Normally 150mm with most manufacturers which is the min you must be away from the opening to avoid weakening the structure of the wall and stick to building regs. the reason its best to keep to the fabrics opening is to avoid having to prove you did right before a window was changed. whos to say a builder wont come along and alter whatever? you cant win sometimes.
K
kirkgas
It's covered in BS 5440-1 flues,
The dimension of 150mm is to the fabric opening ie where the frame is sealed to the hole in the wall, and only relevant for a dead light window or these PVC frames you get with a large window pane next to a PVC door, on one side the flue would need to be 300mm from where the door opens, but on the other side it would be 150mm from where the PVC unit is sealed to the hole in the wall.
To me the statement is " a minimum clearance of 300mm from an opening to a flue" so what is the flue and what is the air intake, on a twin assembly the flue is in one position and needs to be 300mm from an opening but the air intake doesn't need to be 300mm as there are no POC's, so on a concentric flue/air intake assembly the 300mm must be from the edge of the flue
M
Mike Jackson
Who's to say a builder won't come along and cut a new opening or build a conservatory over the flue. All you can do is fit it to the regulations, you cannot be responsible for the actions of others after you have finished the job. If there is any doubt take a photograph.
B
buckley plumb
B
buckley plumb
Worcester spec 600mm now in the compact boiler manual for flues like this
yes you have it that,s what ive been trying to say flue discharges paralell to openable window so not an issue when closed but when open the window opens to almost 45 degrees and is top opening (hinged at top) this is less than 100mm one post says the sash isnt the opening the hole in the frame is! but lets say you have a negative pressure into the building like another window open on other end of the house and breezy conditions this scenario would surely pull poc into the building at an alarming rate?......
B
buckley plumb
seen many like this I think common sense should come into it - the ones on my patch I have fitted window restrictors available from screwfix or tool station for £3 to stop the window opening too far.seen some where window opens over the flue Toolstation > Ironmongery > Window Hardware > Window Restrictor Arm
B
buckley plumb
easy fit window restrictor from windowcare 01709552288 - YouTube hope this helps
B
buckley plumb
if you restrict the window and note it on your paperwork your covered - if someone removes it its on their head . you could always use tamper proof screws
I wouldn't be happy with that personally. Years ago we used to screw windows shut and say they were not openable, we were told by corgi that was not acceptable.
Again its a bit of a grey area but you could argue that the window is facing a terminal at its furthest point. I would be doing a co room test with the boiler on full and the window open.
Again its a bit of a grey area but you could argue that the window is facing a terminal at its furthest point. I would be doing a co room test with the boiler on full and the window open.
D
Dotty
Which wouldn't necessarily give you an accurate snapshot. You would need to be sure that the poc's were being blown towards the window.
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There was a case like this last year or early this year where the window was changed from fixed to opening and the boiler installer was prosecuted I believe, death involved obviously.
i agree with you mike, and i normally work to that way of thinking but i also know of a couple of engineers who have been made to return to work by gas safe because the flue was to close to something fitted afterwards. It would be sad to think you need to take photos of all your work or gas safe believe the word of a builder or tennant over an experienced engineer.
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screwing windows shut is now considered a no no ,so how about gluing them shut the rest of the window is probably glued together im talking wood frames here
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