The table below can be used to compare equivalent diameters for rectangular and round circular ducts.
Rectangular to round duct transition calculator.
Friction loss calculator for sheet metal ducts.
The rectangular dimensions and the air flow volume are adapted to the equal friction loss.
Transition elbow offset box wedge.
Step 2 enter in the value for the diameter of the round.
Friction loss calculator for flexible ducts.
Multiply this number by 3 14 pi to get the area of the round duct in square inches for example 16 x 3 14 50 24 square inches.
This can be found by multiplying the two adjacent sides of the rectangular duct.
Converting a rectangle to round sheet metal duct work is something that is common in hvac.
Round use a slightly smaller diameter for less crimping or to finish.
Remember to add if bending the lower scrape in or out upper diameter.
The table is based on the ducts friction loss formula.
The equivalent diameter is the diameter of a circular duct or pipe that gives the same pressure loss as an equivalent rectangular duct or pipe.
Square to round calculator.
This opened the door for the use of sheet metal for ducting.
Step 1 use a square or rectangle to round transition calculator.
Equivalent duct calculator round vs rectangular.
I want to calculate.