Redirecting flue down

[amos-in-sydney]

I’m embarking on a pizza oven build and am aiming to achieve something like the forno bravo Vesuvio look with the straight side walls and symmetrical look. I will put the oven near an alfresco area, but it won’t quite be under the roof. I don’t want a short chimney releasing the smoke at a height where it will get caught under the alfresco roof, but also don’t love the idea of having a long chimney to take it above the roof (it’d need to be 12ft high). I’m wondering if anyone has redirected the flue downward then away and created the draw with a can. I could run the flue behind some cabinetry and out a wall where the smoke could get away. Is this just silly? Any advice would be appreciated.

[david s]

It is recommended that any bends do not exceed 45 degrees, but I have seen plenty that go to 90.
I've done a number of ovens tucked under the eaves like this which gives the operator complete cover, but the oven with its bum sticking out in the weather. Advantages: no roof penetration, single flue only required.
Disadvantages: some folk think it looks odd
I believe that function and performance always trumps appearance, some disagree.The extra height increases draw to easily compensate for the restriction of the bends, while the roof provides a good anchor point to support the tall flue. The flue exit should be 600m (2 ft) higher than the roof and the pipe at least 50mm (2" away from the gutter or facia.