DIY flue modification

Joined
10 Jan 2018
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Hi, I've been a bit alarmed by my boss who has modified the flue on a gas boiler to make it 'work better'. Can anybody tell me if this is madness or illegal? The new boiler doesn't seem to be as efficient as the old one so he stuffed a brick into the flue pipe. This has blocked it up maybe 75% Surely, if the exhaust fumes can't escape as well as the design intended, the gas won't burn as well. Will this lead to carbon monoxide? Any replies before I start work again on Monday will be very much appreciated.
 
Wouldn't the venturi sensors prevent the boiler from functioning?
 
I expect he's pulled them out. Bloody things only get in the way! I should have said it's not a twin walled flue where the air comes in and goes out the same pipe. I think it's called an open flue where the exhaust gasses only go out.
 
I expect he's pulled them out. Bloody things only get in the way! I should have said it's not a twin walled flue where the air comes in and goes out the same pipe. I think it's called an open flue where the exhaust gasses only go out.

I am not a plumber... if it is a single flue, then I presume that it sucks in the air locally, meaning yeah, CO could leak out. With a balanced flue, I don't understand how if it has been installed properly, the CO could leak back into the room. I am happy to be corrected by the proper plumbers here though.
 
OP, if what you say is true you should contact Gassafe asap 0800 408 5500 or Cadent 0800 111999
 
This is either a mad wind up or weirdly true, life can be stranger than fiction sometime. If it is true then report immediately.
 

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