The difference between vent sizing for natural-draft appliances and fan-assisted appliances is that:
A) Columns for fan-assisted appliances list both a minimum and a maximum appliance capacity for each vent size.
B) Columns for fan-assisted appliances list sizes for both vertical and horizontal installation.
C) Vents for fan-assisted appliances are always the same size as the connector on the furnace.
D) Vents for fan-assisted appliances are typically larger in diameter for the same BTU capacity.
A
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