SMath Forum SMath Studio Samples Rectangular Duct Size Finding From Equivalent Diameter 1 Pages (1 items) Rectangular Duct Size Finding From Equivalent Diameter - A tool for table search and selection - Messages Go to last post #1 Posted: 2020/5/18 17:24:53 overlord 580 likes in 1,348 posts. Group: Moderator Simple tool for fan duct size calculation.fan_equivalent.sm (32.3 KiB) downloaded 718 time(s). 1 users liked this postfrapuano 2020/5/19 02:09:00 1 Pages (1 items) New Posts No New Posts