Yes I meant if you need two flue lengths to get through the wall, is it required to cut one length back (the extension piece). So you have a the joint visible on the inside? Not in the wall cavity.
I was wondering if you need to use an extension pack ( non telescopic) because the flue is exiting the boiler from the side not the rear. And the standard flue is too short.
Hey am a 3rd year apprentice studying for my NVQ level 3 and have a question I wondered if any one could help me with. I know if a flue is to be boxes in it needs access panels so the joints in the flue can be expected, however what happens if your siting a boiler with its side close up to the...