I hope you can help. We are hoping to have a conservatory built but the flue is on the outside wall and will need modifying. The boiler is Keston and drives a pressurised heating system. The flue is 2 pipes one faces up one down (yes I am clueless), is it possible to modify these with pipe extensions so that the fumes are taken higher and out of what will be the conservatory roof? How about the flue that points downwards? Advice appreciated, my fear is that the boiler will need moving completely, this will make the project unaffordable. Thank you