Are solid square ducts better and cleaner than collapsable types?


Cleaner yes. Better? Depends on how they're installed but if proper, then not really. They each fill the need they are designed for. I personally would use hard duct whenever I can but flex duct is necessary in certain applications.

Updated on January 12, 2018

Original Article:

How to Clean Air Ventilation Ducts Yourself
By Dan Robbins