This quiz is based on the FAQs on the JPL website and the Air Duct Council (ADC) 6th Edition, Flexible Duct Performance & Installation Standards. The JPL FAQs are provided based on the most frequently ...

and new equivalent length values for flex duct junction boxes. Manual D, from the Air Conditioning Contractors of America (ACCA), provides a single set of ANSI-recognized duct sizing principles and ...