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Posted

I inspected what was the largest flue lining I've encountered. Santa could actually come down this one. I didn't measure but I can estimate 18-20" square opening.Does anyone have info on flue sizes and their affect on drafting for wood burning fireplaces?

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Posted

The typical requirement is that the flue area be 1/10th of the firebox opening area (1/12th if the flue is round). A larger flue would be better than smaller, but I suppose there are limits to that.

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