Oil boiler flue fix?
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adriandonlan
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Posts: 4
Joined: Fri Mar 08, 2019 12:40 pm

Oil boiler flue fix?

by adriandonlan » Tue Sep 19, 2023 12:25 pm

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.
Attachments
IMG_20230919_120640542~2_copy_750x1000.jpg
IMG_20230919_120651936_copy_750x1000.jpg
IMG_20230919_120708675_copy_750x1000.jpg
IMG_20230807_111501497_copy_750x1000.jpg

stoneyboy
Project Manager
Project Manager
Posts: 6446
Joined: Wed Dec 10, 2008 6:44 pm

Re: Oil boiler flue fix?

by stoneyboy » Thu Sep 21, 2023 9:58 pm

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

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