Why ATU Vents?

Installation professionals question why ATUs can’t simply be vented through the existing house plumbing stack

Question:

I am curious to know the function of a vent on an ATU. Homeowners hate to see them, hiding them costs time and money, and they can be a source of odors. I install Clearstream units, and they don’t have a vent. They seem to work just fine. If the ATU can vent through the...

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