I'd like to attach some sort of awning to the back of my house. However, the outlet for the gas boiler (presumably a balance flue as there's only one) is slap bang in the middle of the wall. Is it a problem this being under a cloth awning? I guess there would be around 40 cm of vertical clearance between the top of the outlet and the bottom of the awning. Boiler isn't a condenser so the exhaust is pretty hot.
Was thinking of something like this: