How long is the ventilation duct in feet?

• A. 28 ft
• B. 36 ft
• C. 32 ft
• D. 40 ft

Answer: (C)

The length of the ventilation duct is found by summing every straight section along the duct path and including the extra length that bends and fittings effectively add. In practice you read the plan or measure the route from the air handler to the farthest vent and add up each segment in feet. The total shown in the diagram for this question is 32 feet, so that is the length needed to reach the farthest point. The other options don’t match the measured run on the plan, so they don’t reflect the actual route.