Just had a boiler installed

[caesarmanager]

Hey I,ve just had a boiler installed by a firm. However I have noticed as the flue passes through the wall its in contact with the wall insulation. The plumber said this was ok as it's only the inner duct that gets warm. Is this correct?

 

[kevplumb]

yes nothing to worry about

 

[caesarmanager]

Thanks for quick reply. Can t flue gases get to like 200 degress c or tempertures like that though?

 

[kevplumb]

not in a steamer (condensing) boiler

and you still have the air gap between the inner and outer flue pipes

as said its the inner that gets warm

the outer pipe is the air intake

 

[Corgigrouch]

Thanks for quick reply. Can t flue gases get to like 200 degress c or tempertures like that though?

I hope not, the inner section of your flue is plastic...

 

[bobw1956]

Thanks for quick reply. Can t flue gases get to like 200 degress c or tempertures like that though?

I hope not, the inner section of your flue is plastic...

Not all steamer flues are plastic

 

[bengasman]

Not all steamer flues are plastic

Only the ones I meet

 

[Corgigrouch]

Not all steamer flues are plastic

I'm yet to encounter a steamer with a metal internal flue... I had always assumed that it was because the condensate is acidic

 

[gas4you]

Isar/Icos

 

[bengasman]

Isar/Icos

Well known for their reliability and longevity.

 

[transam]

lues ravenheat csi primary A boilers had (or have) alloy (metal) internal flues , acidic flue gases/condensate , yes , tell me about it !!!

 

[compheat]

Ferroli opimax 30HE inner flue is ali

 

[Corgigrouch]

Ok ok ok.... I get the message, but I don't really class ideals as boilers

So basically they are boilers that will die before the alloy corrodes through...

 

[caesarmanager]

Ok an over reason I ask is because it was a telescopic flue that the installed. However he said that this was missing the sealing tape that secures the telescopic joint but he used some high strength tape he had in the van instead as he said it would be Ok as it was only to stop movement of the telescopic part that falls in the wall.

 

[bengasman]

Inner tube of concentric flue is usually plastic, and seals the same way as pushfit waste pipe.
Outer tube is metal on metal, and therefore not gastight.