I think that this is a UK customer. The balanced flue is usually wall mounted on the backside of the boiler location.
It basically looks like a 'sideways' chimney and will have a grill over it to stop birds nesting.
I hope that helps you out. Unless you need additional info, please click ACCEPT to close our question/answer session. Bonuses are great and feedback would be appreciated too. I'll leave some for you. Thanks
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Thanks very much and good luck.