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Post by ronyon on Jan 22, 2019 17:44:49 GMT -8
I would like to use an insulated rectangular chimney after the bell. I would use the same cross sectional area. Seems like it should work fine. What do y'all think?
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Post by satamax on Jan 22, 2019 18:54:17 GMT -8
Well, The corners are stalling gases. So it's better practice to match diameter to width an length.
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Post by peterberg on Jan 23, 2019 13:45:54 GMT -8
The simple formula: (2*length*width):(length+width)= diameter equivalent would guide you to the right proportion. So the cross section area of the rectangle is quite a bit more than the circle in order to compensate for the friction in corners.
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Post by satamax on Jan 23, 2019 13:57:06 GMT -8
To tell you what background i have.
My workshop heater is a 22cm round, exhauting into 20cm square chimney, which had rounded corners. And that works, with aproximately 11m² of ISA.
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Post by johnjorgensen on Jan 24, 2019 0:33:18 GMT -8
This may be stupid, but what happens when chimney is bigger: 5" riser (110 cm2) 600 cm2 exhaust port in barrel and 6" pipe going into 10" chimney...
Would a 6" chimney be much better? I have 10" steel chimney laying around, but could find 6" if needed. Thx
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