Apprentice question
Field check
Standard work. Do it right, keep moving.
Flex does not like sharp unsupported direction changes. Add a rigid angled boot/elbow where needed, then connect the flex so the core stays round and open.
['When a boot collar points the wrong way for the branch path, pulling flex hard to make the turn can crush the wire core. The room may get weak airflow even if the duct is technically connected.', 'Use a rigid sheet metal elbow, boot shoe, or approved angled fitting at the collar first, then attach the flex to that fitting with a smooth path and proper support. Keep the flex stretched, round, and free of kinks.']