Page 1 of 1

Oil boiler flue fix?

Posted: Tue Sep 19, 2023 12:25 pm
by adriandonlan
Hi,
I have an oil boiler (Grant Vortex utility 50/70), the lower part of the flue has developed a hole. This was detected during the service, the company told me that the flue used (poujoulat twin wall therminox) will need to be replaced and a grant flue installed.
This boiler is in an outside building and not inhabited. Due to scaffolding etc they quoted £4k! I have managed to find a replacement section of the flue but it looks like the flue will need to be dismantled to fit it. If someone could help answer a few questions I'd be grateful.
When installing these flues is it normal to build them from the boiler upwards? The second section is an adjustable one, I thought that I could make this smaller to remove the section with the hole? But this doesn't seem possible. I then thought I could remove a section further up where the flue has a 90° bend but I not sure if the remaining section will be secure?
Thirdly, I thought that I could create an entirely new flue that comes out of the wall behind the boiler, but I'm assuming that this is not possible due to regulations. I've attached some photos.

Re: Oil boiler flue fix?

Posted: Thu Sep 21, 2023 9:58 pm
by stoneyboy
Hi adriandonian,
With a lot of tasks you never know what you are up against until it work in progress. Suggest you try taking the existing flue apart - supporting it as necessary - and see if the new section you have found will fit.
Regards S