How close can a boiler flue be to a window?

[Dannypipe]

Well, like I say, I use my gut on a lot of decisions. I have had my business partner say that I was being over cautious. Each to their own. I'm practically an insomniac as it is. The last thing I need is to be up at night worrying about a boiler I installed that day.

 

[Halesowen1]

But why would you worry? you have fitted the boiler to what is says, it is this distance for a reason.
Dont worry about flue being 300mm from a window where it might go into the room, how about a flueless fire?? If these are allowed I would never worry about a flue ever again.

 

[Dannypipe]

Here's a boiler I replaced last year. Concealed flue, running through the ceiling void. Various faults with the boiler (leaking HEX, and more). So when they asked me to replace it, I said I wasn't really happy about running a long concealed flue (with access panels) and then terminating the flue here. First photo shows the old boilers terminations (nice - not) then you can see up the shaft.This shaft is surrounded by windows into the various flats on all four sides. Where I took the picture from is a no mans land. Locked with a FB1 key, and used only to access the flues. Windows on all fours sides, and only about 8ft X 8ft.

I managed to convince the customer an electric flow boiler was a better option as it was a rented out, one bedroom flat. No more yearly CP12's and reduced servicing costs. Plus I don't need to worry that some one might be breathing fumes from a boiler that I installed.

 

[ryangas]

c'mon ryan think about it, it can NEVER be the centre of a flue it must always be the nearest point, eg you have a 100mm flue and measure from the centre, then go to another house that has a 150mm flue and again if you measure from the centre there is more flue within range of the window, however if you measure every flue from its nearest point then the diameter of the flue is irrelevant and therefore the volume of POC's getting to the window will always be the same

are you saying that to measure the distance of the flue from the opening you put your tape at the window edge and take it to the end of the flue and measure that distance ?

 

[Dannypipe]

Oh and for those of you who are keen eyed, you'll see the flue from the flat above, is practically next to the bathroom extractor fan. Doesn't matter to me that an extractor fan will blow air from the bathroom out, it's still an opening and therefore is also too close to the flue termination.

This block of flats (about 8 flats) has had 6 boiler ID's or AR's. Two from me. I've changed three boilers in the building in total. BG changed 2 others. Two of the boilers I changed to electric flow Amptec boilers. The other a WB with plume kit.

It was terrible, I found one flue which was patched with a coke bottle and duct tape. Another that run through the property above, and was spilling (in the little girls bedroom who lived in the flat above).

Nearly all Keston boilers, fitted by a (at the time) Corgi registered engineer.

 

[GrahamM]

The Manufacturer is king here as is mentioned time and time again.
Worcester allow you to have the flue 150mm from an opening as long as the Plume kit is fitted and exhausting at least 300mm from the opening.
I still do not agree with it myself and would always endevour to have the standard flue at least 300mm from any opening, but if was really no other option it may be done.

 

[Halesowen1]

Take reading from the edge of the brick not the glass, then to the outside of the flue in a straight line not on an angle to the outlet. Imagine the tape is up against the wall not angled out.

 

[GrahamM]

are you saying that to measure the distance of the flue from the opening you put your tape at the window edge and take it to the end of the flue and measure that distance ?

From the outside edge of the flue to the opening is the distance.

 

[Halesowen1]

Oh and for those of you who are keen eyed, you'll see the flue from the flat above, is practically next to the bathroom extractor fan. Doesn't matter to me that an extractor fan will blow air from the bathroom out, it's still an opening and therefore is also too close to the flue termination.

This block of flats (about 8 flats) has had 6 boiler ID's or AR's. Two from me. I've changed three boilers in the building in total. BG changed 2 others. Two of the boilers I changed to electric flow Amptec boilers. The other a WB with plume kit.

It was terrible, I found one flue which was patched with a coke bottle and duct tape. Another that run through the property above, and was spilling (in the little girls bedroom who lived in the flat above).

Nearly all Keston boilers, fitted by a (at the time) Corgi registered engineer.

Yes these are wrong, but a flue to M.I is ok.

 

[ryangas]

sorry to go back to this guys but think about it if you measure from the center of the flue it makes no difference what the diameter of the flue is you are always measuring from the same point

 

[ryangas]

From the outside edge of the flue to the opening is the distance.

so if you measure from the center it is always from the same point which it isnt always the same point if measuring from the outside edge of the flue is it ?

 

[Halesowen1]

It means the flue is always 300mm away, doing it your way it wouldnt be would it??
Different size flues.
Going from the centre you would have to make it differnt lenghts for differnt flue sizes, plus how can you measure it correctly as the centre sticks out firther from the wall. Hence measuring on a straight line to the oputer edge of the flue.

 

[GrahamM]

The flue should be 300mm from an opening- this is standard.
You measure from the outside edge of the flue to the opening. This is the standard. It's that simple!

 

[ryangas]

it is for the poc so the center of the flue i would of thought im not saying your wrong btw if im corrected i like to know that its concrete so i know i should change the way i do things

 

[ryangas]

3 assesors have told me from the center of the flue thats why im a tad confused

 

[Mbear]

so if you measure from the center it is always from the same point which it isnt always the same point if measuring from the outside edge of the flue is it ?

Dig out an mi from a boiler. The flue term location pic always shows its arrows from the edge of the flue. The arrow doesn't start in the centre of the box (box being the flue term).

 

[ryangas]

im not sure that your correct tbh i will have to call gas safe tomorrow to clarify

 

[Halesowen1]

3 assesors have told me from the center of the flue thats why im a tad confused

Dear oh dear.

 

[ryangas]

if everyone is so sure could someone please tell me exactly what regs state word for word

 

[Halesowen1]

If you fitted a Room sealed natural draught (old square cage style) would you measure from the centre??
As these can be 300mm to the opening, the centre would be about 200mm so you are saying its Ok to fit them 100 from window??
It is the outer edge not centre.

 

[Mbear]

if everyone is so sure could someone please tell me exactly what regs state word for word

Listen mate the mi pics are quite clear. I wouldn't waste ur cash on a phone call

 

[Mbear]

If you fitted a Room sealed natural draught (old square cage style) would you measure from the centre??
As these can be 300mm to the opening, the centre would be about 200mm so you are saying its Ok to fit them 100 from window??
It is the outer edge not centre.

I agree with u on this one 100%

 

[ryangas]

it would have to be a very low kw boiler but thanks for clarifying that makes perfect sense

 

[ryangas]

this is why i came on here its always good to be corrected if it makes you a better engineer thanks guys has anyone noticed that a lot of the advice regarding boiler faults is absolute dribble

 

[GrahamM]

If you fitted a Room sealed natural draught (old square cage style) would you measure from the centre??
As these can be 300mm to the opening, the centre would be about 200mm so you are saying its Ok to fit them 100 from window??
It is the outer edge not centre.

Just bet me too it. Was just about to use that example.
Got some flues to measure in morn. Off bed.:seeya: