I have a 6 year old RS100 Mexico Super 3 floor mounted boiler which continues to perform beautifully. However, as part of the works associated with building a new extension, I need to raise the outside ground level and this will interfere with the flue position. Do I have any other option other than lifting the whole boiler? Ideally I would like to take the flue vertically for 500mm at which point angle it back out through the wall. The boiler will be moved permanetly in 6 months time once the extension is finished.