Brazier Overlap: What's the minimum spacing?

So, I've just started making hardened defenses at my base, and I started putting a stone wall around my "core" 24x24 area when I read on the wiki that the zone of overlap for braziers is just under 23 tiles.
If I put a brazier at each corner of the 24x24 area, will they suffer an interference penalty? There would only be 22 squares between each brazier, but if you measured the distance from center-to-center of each brazier, that's a 23 tile difference which is just larger than the reported brazier-range. Is this spaced enough to avoid damage penalties, or will there be overlap?
If I put a brazier at each corner of the 24x24 area, will they suffer an interference penalty? There would only be 22 squares between each brazier, but if you measured the distance from center-to-center of each brazier, that's a 23 tile difference which is just larger than the reported brazier-range. Is this spaced enough to avoid damage penalties, or will there be overlap?