Building regs re positioning of boiler flu?

[Duke]

The building regs have something to say about where an flue for a boiler can be positioned, in relation to windows, etc. Can the relevant section be found online anywhere?

Actually, I don't want to position it anywhere near a window; I want it to go straight out through a cavity brick wall, to appear about 8 ft above the public pavement outside. Is this acceptable?

Thanks,

Duke

[dom]

Here:

[Duke]

positioning there. Anyone know which it is?

Thanks.

Duke

[Lobster]

AFAIK it's not in the building regs as such; this comes under British Standards which Ed Sirett has kindly (if a little dodgily! :-) ) made available on his website at

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It's pretty turgid stuff though - you'd be better off consulting the user-friendly version which will surely be included with your installation instructions.

Sounds fine in principle to me, but there might be other issues (eg proximity to a boundary). And where does your pressure relief drain go? That might be an issue 8' above the pavement!

David

[Ed Sirett]

The installation instructions are the final word on the matter. It is really important to find out what you may do before you buy the boiler.

[Duke]

Thanks for the tips. Good point about the pressure relief drain. I could route that into a nearby bathroom sink waste pipe. Would that breach any building regs or otherwise pose any problems?

Duke

[Duke]

Thanks for the sensible advice.

Duke

[Lobster]

Pretty sure that's not allowed - again the installation instructions should specify. For a start, I think the point of discharge must be clearly visible, so if a dangerous fault condition develops it doesn't go undetected.

David

[Duke]

Seems reasonable. Thanks. I wonder if having the overflow pipe end above a wash baisin is acceptable...

Duke

[Ed Sirett]

There are 11 services to connect to a combi boiler (9 to a conventional one).

It is almost never the case that all 11 are just exactly as they need to be. You have to choose a location that (other things being equal) minimizes the total cost of installation.

Approx order decreasing awkwardness.

Air intake. Flue. Flow & Return. Fuel Cold In & DHW Out. Condensate waste Safety Discharge Pipe. Electric supply Heating control signal.

I would have thought the discharge pipe brought down to ground level outside would have met the rules. A condensate pump ( sub £100) can be used to solve condensate problems.

[Duke]

Thanks for that. A discharge pipe near ground level could be an option.

Duke