Boiler/flue question

[bfccrazy]

With this place being the font of all knowledge I was hoping somebody could help.

With a vertical flue for a boiler (coming out of the ceiling) are there any regulations with placement?

How far from the boundary they can be or how close to a chimney they can be?

[Bosscat]

https://www.google.com/url?sa=t&source= ... rKReFGwTwq

Screenshot_20240418_213046_Chrome.jpg (165.55 KiB) Viewed 764 times

[bfcjg]

Unless you're a gas safe registered engineer, you shouldn't go anyway near flues,boilers etc,amending/alering your roof where a flue exits should not be undertaken without a gas engineer planning the termination for uou and doing the work. Attempting to alter a flue ie putting a bend in is also a massive no as the exhausted waste gases flow is calculated by the installer.

[Funkydrummer]

I'm with bfcjg on this.

It's not called the silent killer for nothing.

[bfccrazy]

Unless you're a gas safe registered engineer, you shouldn't go anyway near flues,boilers etc,amending/alering your roof where a flue exits should not be undertaken without a gas engineer planning the termination for uou and doing the work. Attempting to alter a flue ie putting a bend in is also a massive no as the exhausted waste gases flow is calculated by the installer.

I've done some stupid stuff in my time but messing with electrics or gas is even beyond me.

It's not a question for me to carry out work but something I've been quoted for so just queried it for some more info.

Also Bosscat.... I found that but it isn't for a vertical flue on the roof which I questioned, the roof has no windows or doors but does have a chimney which I'm wondering if there are any regulations around

[gawthorpe_view]

General guidance can be found in BS 5440 Part 1.
However, any dimensions stated can be increased or reduced by the manufacturers instructions which take precedence.
If you have a particular boiler in mind, go the their website and download the manuals.
All the information you need will be there.

[Sausage]

As others rightly suggest on here, let the experts tell you what is needed. However, I had my fingers burned on this matter a few years back when my boiler and flue was replaced and signed off by a Gas Safe engineer, only for it to be condemned 18 months later when it was serviced by another company. The lesson is that it doesn't hurt to read around a subject even if you're not qualified.

With that in mind, you need to have a look at Approved Document J, particularly pages 49 and 50, which suggest a minimum distance between a chimney and another opening on the roof (and I would regard a gas boiler blue as another opening in this instance) of 1500mm. But that's just my interpretation and others may disagree.

The other thing to bear in mind is that some manufacturers have more onerous standards than Approved Document J, and you will void the warranty if the flue is not installed to the manufacturer's standards.

[Acting Claret]

1.2m from a chimney, boundary is irrelevant for a vertical flue. As posted, check the manufacturer’s instructions.