Discuss Can a gas boiler flu run externally from ground to second floor? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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does anyone know of a system that will allow a gas boiler (any) with a flu length to reach the ridge line (second story from ground) on the outside of the house, so about 7 or 8m? The boiler can be mounted on the external wall so there is only one bend.

We have an annoying neighbour and so cannot vent onto his land but cannot find a flu system that will allow this?
 
If it crosses the boundary outside of guidelines then he can legitimately ask you to move it
 
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Veismann boilers do one see page 20 flue option 5 (can only be used with their boilers)
 

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I’m pretty sure most boiler manufacturers do a concentric fluing system (I think it’s called this) 2 individual flues one for product of combustion and the other for air in take
 
Intergas do as above or a normal concentric vertical flue up to 10m but you must factor in the fittings a 45 degree bend is equal to 0.5m of a meter and a 90 degree bend is equal to 1m of flue each section must have a bracket adjacent to the joint be accessible for inspection in case of leakage in the years to come and to examine it for its integrity . Kop

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No flues need to be internal there would be to much condense coming back down the flue all the manufacturers diagrams show internal .
 

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