'Air Ventilator Yellow' Flexible Ducting 18 Inch Flex Duct Cfm
CFM. 4". CFM. 6". CFM. 8". CFM. 10 Duct Height - Net inside dimension in inches. ROUND DUCT SIZE ESTIMATE. RECTANGULAR DUCT SIZE ESTIMATE. 14". 5". 6". 7". 8". This video, produced by Steve Nagy and Chris Cherry, demonstrates how easy it can be to change or repair flexible duct systems. Flex duct connection - the PROPER way! ...