Boiler flue - NOT boxed in - allowed?

Question

Before I have a gas safety inspection and potentially have it fail, does anyone know..

(For a house we want to let)

The boiler flue (combi, not condensing I don't think) goes from the boiler in the kitchen, up through the ceiling to the attic bedroom above, and out through the roof.

In typing, I've just realised it must pass boxed-in through the first-floor bedroom, which I presume I now have to install flippin inspection hatches on?

In the attic bedroom, the flue just runs from floor to ceiling. Not boxed in - just the metal flue pipework.

Is that bit allowed? Or will I have to box it in somehow? (If so, there's going to be a follow-up question of can I do that myself, and what rules/regs are involved?)

Cheers!

Dave Plowman (News) · Accepted Answer

Would be worth finding out what you have. A combi can be condensing ornot. As can a non combi.

Andrew Baker · Answer

Well.. it turns out I'm stupid.Thinking about it now.. it's not the boiler at all.. it's the flue from the gas fire in the lounge below.So.. same questions, but different device ;-)

Kenny · Answer

Does it get hot?  Does it contain noxious gases ?

Jim K · Answer

it's a flue from a combustion deviceJim K

Tim Watts · Answer

On Tuesday 05 February 2013 13:21 Jim K wrote in uk.d-i-y:

Well... Condensing gas boilers run so cool these days that they use plastic flues for many - not to mention that a boiler will be drawing air in through the same pipe assembly.

A gas fire flue probably gets pretty hot but possibly not hot enough to ignite anything. I am not going to offer an opinion on boxing in or not.

And (to the OP) is it a single walled flue or double wall with insulation?

A coal stove flue gets bloody hot :-o

John Rumm · Answer

I am not aware of any special requirements from BS 5440 (Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW).

Part B3 of the building regs, section 11.11 has some words on it...

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Heliotrope Smith · Answer

Andrew Baker  wrote innews:5110ed03$0$1105$             The flues in void regulation applies only to fanned flue appliances.Open flued boilers, fires etc don't come in to the scope ofthis regulation.Provided your gas fire flue is rigid metal and not flexibleliner then I do not think you would be required to box it in.--- news:// - complaints:              ---

F Murtz · Answer

Free heat for the upstairs room.

Tim Watts · Answer

On Wednesday 06 February 2013 00:38 F Murtz wrote in uk.d-i-y:Indeed it does - even when contained in a masonry chimney!

Boiler flue - NOT boxed in - allowed?

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