Chimney or exhaust diameter

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giogee
New Member

Posts: 5

Chimney or exhaust diameter Sept 5, 2018 13:04:00 GMT -8

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Post by giogee on Sept 5, 2018 13:04:00 GMT -8

I'm looking at build a system but I'm struggling to find information on what diameter size work best on a system is there a rule of thumb??

my riser tube will be casted at 7" internal diameter and a 10" outer.

The batch box sizes will be copied from the spread sheet but as above im not sure if I should have a bigger chimney of say 8 inches which I will struggle to get the pipes for or go for a 6 inch pipe for the flue stack.

Thank you

Last Edit: Sept 5, 2018 13:06:21 GMT -8 by giogee

peterberg
Global Moderator

Posts: 3,239

Chimney or exhaust diameter Sept 5, 2018 23:18:10 GMT -8

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Post by peterberg on Sept 5, 2018 23:18:10 GMT -8

It's simple, really. Your chimney need to be the same size as the riser diameter or slightly larger. Some people got away with smaller flue sizes but you are running the risk of a heater that isn't up to specs. Remember, the csa of an 8" flue is 1.77 times larger as compared to a 6".

regards, Peter
+52° 1' 47.40", +4° 22' 57.80"

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