AC Infinity Flexible 8-Inch (20.32 cm) Dual-Layer Aluminium Ducting, 25-Feet (7.6 m) Long for Heating Cooling Ventilation and Exhaust

Reviews

C. Kahus

Has no air leaks whatsoever. Has a good sturdy wire inside but not so sturdy you can’t hit it easily with pliers.

Blue Lion

Highly durable and helps with noise a little bit compared to other regular aluminum duct hose. I can’t imagine AC guys would put up with this… The 25ft length was easy to hang and snake around the piers to get the supply and returns exactly where the structural engineer spec’d to get good airflow throughout the space (2600 sq ft).