INSTRUCTIONS FOR USE Step One - Identify the volume of air that will be passing through the duct Step Two - Select the duct size from the table that can carry that volume of air Step Three - If desired …

INSTRUCTIONS FOR USE Step One - Identify the volume of air that will be passing through the duct Step Two - Select the duct size from the table that can carry that volume of air Step Three - If desired …

May 11, 2012 · Get a duct chart that shows cfm for square and round duct is the first item you need and dont forget if any flex is used its up to 15% less than metal

May 14, 2012 · I need to be moving 1600 CFM.' most residential duct systems are sized around 0.1 - 0.15" of w.c so you would slide you chart over to a point where 0.1" matched up with 1600cfm. the …

Sep 10, 2021 · My questions are : 1.What size of return grill and return duct should I use between studs ?. (1 pro said, 14"X14" return grill with 12" metal round duct (another pro said, 14"X14" return grill …

Nov 8, 2018 · There seems to be different data on the correct size duct for return sizing on a 4 ton unit. Based on a 4 ton, would a 18" round flexible duct be sufficient CFM for a 4 ton unit? The return grill …

Aug 2, 2011 · Okay here goes... Customer has a small house 1000sf. main duct sizing is 8x12, according to my charts max cfm is 400. The lowest setting on the furnace is 757 cfm. I don't want any …

Sep 11, 2015 · I do residential install so I know the sizing and static for it. The duct work needs to carry 400 cfm per ton and I have a chart using .1 static so a 10 inch round metal duct is good for about 420 …

Sep 18, 2010 · The link for the duct sizing chart shows that a 10x14 sheet metal trunk is capable of 670 cfm at .07 Obviously there are many other factors, but I would like to think that a minimum of 1600 …

Sep 12, 2023 · Save Share Like HVAC_Marc 18,077 posts · Joined 2013 #7 ·Sep 14, 2023 View attachment BTU per Flex duct sizing chart.pdf My CFM per flex duct chart