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OK, I've been doing quite a bit of research, browsing the web, etc. and trying to find good illustrations of how to install a vertically vented concentric system. It seems all the diagrams I see show installs going through the roof only, not through a ceiling and then on up through the roof. In...

Hey all, New to this forum and am wondering if anyone can give me some advice on installing venting for a Modine separated combustion heater. It looks like I have2 options with a vertical vented system. Either concentric or using 2 vents. My question is that once I go through the ceiling and on...