Formula To Convert Rectangular Duct To Round Duct

The formula is generic and any unit can be used.

Formula to convert rectangular duct to round duct.

How to calculate duct sheet area duct quantity rectangle duct square duct round duct flat oval duct amazon. For rectangular ducts a width of duct side inches b height of other duct side inches equivalent round duct size for a rectangular duct equivalent round duct size for a rectangular duct can be expressed as deq 1 3 x a x b 0 625 a b 0 25 where deq equivalent diameter a one dimension of rectangular duct inches. Step 5 select a size of square duct that has the same area. If it cannot be converted to round because of restrictions it should be converted to an equivalent flat oval size.

An aspect ratio of 1 is round duct. The equivalent diameter of a 300 mm x 500 mm rectangular duct can be calculated as. Equivalent duct calculator round vs rectangular. When a designer sees rectangular duct on a drawing they should convert it to an equivalent round size if possible.

Friction loss calculator for flexible ducts. The calculator below is based on formula 1. That will at least give the duct. Approaches the efficiency of round duct.

Rectangular to round conversion de 1 30 ab 0 625 a b 0 250 a length of one side of rectangular duct inch b length of adjacent side of rectangular duct inch de circular equivalent of rectangular duct for equal friction and capacity inch source. Other hart cooley mobile tools. This is a handy tool when deciding what size duct you want to use for your application. Https amzn to 39pgvjc 1 wireless refrigeration.

Convert round duct size to rectangular duct size for equivelant airflow. 2001 ashrae fundamentals p. 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. Rectangular to equivalent circular duct calculator.