The combi boiler is sited just beside an outside wall. If the pressure release blow pipe goes straight through this wall it will exit over the front door. My plan is to run the pipe allong the inside of the wall 12 feet and exit there where there is no door or window below. The boiler is sited on the first floor. The pipe will have a slight fall.
---------------- | |boiler| ^internal wall^ | | |....outside wall | |¬ Exit of pipe about 12 foot away |
Thanks