central heating flue Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[robertpet]

Hi i wonder if anyone can help me. I have a Trianco Eurostar oil boiler i think its quite old, i did have it serviced 6 months ago when i moved in the heating engineer said it was in good working order. The flue pipe that comes out of the top is about 4" in diameter and goes into a 6" pipe the gap between the two seems to be packed with a kind of cement compound and a lump has fallen out. could anyone tell me if this is flue jointing compound and is it just a case of filling in the hole from where the piece fell out and is it safe to use the boiler before this is done.

thanks

[Perry525]

It depends on where it is, if its outside or in a out building that has ample ventilation OK, indoors its not a good idea to use it until repaired. The possibility is that flue gas may fall into a living room, this is very likely if as would appear from your text the pipe is mainly outside and uninsulated.