reposition boiler flue

[donkeyyy]

I need to move the flue on my combi boiler to make way for a conservatory. It is a vokera 726 less than a year old and i was wondering if it ok to redirect it internally by 2.5 metres and turning it out through an external wall,which is easily 1.5 metres from any opening.
Also any regulations concerning boxing in of flue.
Any info/feddback appreciated

 

[petit_pablo]

Id get in contact with the manufacturers. Your getting close to the maximum equivalent length for a horizontal flue run at that distance.