ADeliver conditioned air from the air handler to the occupied space
BReturn room air back to the air handler for reconditioning
CExhaust stale air to the outdoors
DProvide fresh outdoor makeup air to the system
✓ Correct answer: A. Deliver conditioned air from the air handler to the occupied spaceSupply ducts carry conditioned (heated or cooled) air from the air-handling unit to registers in the occupied space. Return ducts perform the reverse function, pulling room air back to be reconditioned.
Keep practising. Use the free HVAC NATE PDF, watch the YouTube walkthrough, or unlock all 10 web questions with timed mock exams.
Theory