condensing boiler. air intake question.

[stem]

The concept of a 'balanced flue' is that both inlet and outlet should be subject to the same conditions. That means, if there is a gale blowing on the inlet, there is also a gale blowing on the outlet. Because inlet and outlet are subject to the same pressure, any wind does not pass through the room sealed boiler, or exert undue pressure on one side of the flue fan.

In this instance the exposed outlet could be subject to strong winds, but the inlet is sheltered inside the conservatory. In theory if the wind was strong enough, air could blow down the outlet through the boiler and out into the conservatory bringing fumes with it. Even if that didn't happen, the fan will now be subject to fighting with unbalanced forces it wasn't designed to cope with.

Also, safety issues aside, air will be drawn out of the conservatory when the boiler is running. If the conservatory is heated in the winter the heat will be being sucked out also.

 

[richardrich79]

How does it work when a boiler is installed inside with a pipe up through the roof>

 

[Dan Robinson]

It's a pipe inside a pipe.

 

[stem]

Untitled

• stem
• 10 Feb 2015
• 1

 

[richardrich79]

Pretty obvious really, I cannot understand why that wasn't fitted straight away.
I found out now that the glass (?) panel directly above the outlet was removed at the time of fitting. I guess this must have been done to comply with regs at the time, I'm pretty sure that the roof is now twin wall poly'.
Surely it's not a big job for a fitter to fit a new flue and make it safe.

 

[richardrich79]

Is http://www.ebay.co.uk/itm/Selkirk-5...DIY_Materials_Plumbing_MJ&hash=item35e4e2c25c this the sort of thing or does the pipe/flue have a special name?

 

[stem]

That looks like a single pipe to me.

 

[Dan Robinson]

No. That is not the right kind of flue.

With respect, you seem to have a rather unnatural fascination with someone else's flue.

 

[Agile]

Flue voyeur?

 

[richardrich79]

I have a lovely view of it (the flue & conservatory) whilst I'm in the bathroom and it always worries me that it doesn't look right.
We had a nasty incident down this way a few years back when some kids surfing died spending the night n a van with a gas fire on & it's always played on my mind.

 

[Agile]

I wonder if those in the conservatory also have a lovely view of you in your bathroom ?

 

[nortonj]

I have a lovely view of it (the flue & conservatory) whilst I'm in the bathroom and it always worries me that it doesn't look right.
We had a nasty incident down this way a few years back when some kids surfing died spending the night n a van with a gas fire on & it's always played on my mind.

Contact gas safe tell them about your concerns, then at least you have done all you can.

 

[richardrich79]

Update.
I showed the owner the comments on here having told him of my concernes and he's getting it sorted.
He's a bit concerned as he's just been approved as a HMO licence without it being picked up upon!

 

[Dan Robinson]

Glad something positive has resulted and thank you for letting us know. . Most posters never bother.

Shows what a joke meant of these "checks" are. .