8x16 Duct Cfm. 16 in. x 8 in. x 4 ft. Half Section Rectangular DuctRD16X8X48 The If there isn't an exact match, go up to the duct size Use the HVAC CFM Calculator to quickly determine needed CFM based on the square footage of the space.
Metal Duct Standard Sizes from ar.inspiredpencil.com
To figure out exactly how big ducts you need for central air conditioning systems, we have prepared complete CFM duct charts for all different kinds of ducts: Two L sections snap together to form the rectangular duct
Metal Duct Standard Sizes
CFM 4" CFM 6" CFM 8" CFM 10" CFM 12" 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12 90 8x4 110 6x6 160 6x8 215 6x10 270 6x12 120 10x4 160 8x6 230 8x8 310 8x10 400 8x12 Title information for each block identifies the name of the fan(s), the curb size and the duct transition part number(s) needed to transition from the listed duct to the curb. CFM 4" CFM 6" CFM 8" CFM 10" CFM 12" 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12 90 8x4 110 6x6 160 6x8 215 6x10 270 6x12 120 10x4 160 8x6 230 8x8 310 8x10 400 8x12
Round Duct Cfm Chart. Title information for each block identifies the name of the fan(s), the curb size and the duct transition part number(s) needed to transition from the listed duct to the curb. Air Volume Equivalent Round Air Volume CFM 4" 6" 8" 10" 12" Duct (inches) CFM 50 6 x 4 550 75 6 x 4 675 100 8 x 4 6 x.
Cfm Chart Duct Size. Larger volumes or higher static pressures should be dealt with on an individual job basis Using the chart, you'll see that for a 12" round flex duct, maximum CFM is 480 CFM or 500 CFM depending on the friction rate