Flue for oil condensing boiler

[SteveStroud]

I am installing a high efficiency oil condensing boiler (Worcester Bosch Greenstar Camray 12/18 Utility)in an attached vented garage. I need a simple vertical flue directly from the boiler to a sloped, pan-tiled roof. I do not need the expensive room sealed flue kits that are offered with this. A conventional flue adaptor kit is available but what kind of conventional flue can I use- are plastic alternatives available? I know that condensate is slightly acidic but the flue gas temperature should not be that high with a condensing boiler.

[oilman]

if you had bought a GRANT boiler they have the best flue syetems
I avoid Worcester Bosch oil boilers