Rectangular To Round Duct Transition Calculator

This opened the door for the use of sheet metal for ducting. Friction loss calculator for sheet metal ducts. Square to round calculator.

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Step 1 use a square or rectangle to round transition calculator.

Rectangular to round duct transition calculator.

Friction loss calculator for flexible ducts. Equivalent duct calculator round vs rectangular. Transition elbow offset box wedge. Other hart cooley mobile tools.

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 equivalent diameter is the diameter of a circular duct or pipe that gives the same pressure loss as an equivalent rectangular duct or pipe.

The table is based on the ducts friction loss formula. I want to calculate. Step 2 enter in the value for the diameter of the round. The table below can be used to compare equivalent diameters for rectangular and round circular ducts.

Step 5 select a size of square duct that has the same area. 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. With some careful planning this is something you can do yourself. The rectangular dimensions and the air flow volume are adapted to the equal friction loss.

This can be found by multiplying the two adjacent sides of the rectangular duct.