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Installation Instructions American Standard Cat 4


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I am looking for the installation instructions for an American Standard #AUC1B08A. I am coming up empty on the Internet.

Specifically, direct vent termination requirements. I am finding an increasing number of HVAC installations where the exhaust vents out a wall and the combustion supply pipe comes through the roof. This would seem to be more work for the installer so why are they doing it? I have rarely seen instructions that did not say the supply and exhaust MUST be near each other ? in the same atmospheric zone. The instructions are usually quite clear on this.

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