Question

The passage carrying conditioned air to the conditioned space is known as:

• A. Shaft
• B. Duct
• C. Channel
• D. Pipe

Hint:

Air flows through ducts — not pipes or shafts — in HVAC systems!

Answer 1

The Correct Option is B

In air conditioning and ventilation systems, conditioned air is delivered to different spaces using a network of passages.
These passages are called ducts.
A duct system distributes heated or cooled air from the air handler to rooms and returns it back for reconditioning.
Ducts can be made of sheet metal or flexible materials and are designed to minimize air leakage.
A shaft is a vertical passage used for lifts or services, not for air flow.
A channel is a general term and not the standard name in HVAC.
A pipe carries liquids or gases under pressure but is not used for distributing large volumes of air in buildings.
So, ‘duct’ is the correct answer.