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Can the Endurance unit be vented with b-vent, or into a masonry chimney?

April 26, 2017b-vent chimney endurance masonry vented

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Can the Endurance unit be vented with b-vent, or into a masonry chimney?

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No. The Endurance units must never be vented into a b-vent or masonry chimney. They must be vented with stainless steel, certified to UL1738 standard. These are Category IV vented appliances. They are positive pressure, and may condense inside the vent because of their high efficiency.