Formula To Convert Rectangular Duct To 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.

Formula to convert rectangular duct to round duct.

Convert round duct size to rectangular duct size for equivelant airflow. Https amzn to 39pgvjc 1 wireless refrigeration. Friction loss calculator for sheet metal ducts. This can be found by multiplying the two adjacent sides of the rectangular duct.

Friction loss calculator for flexible ducts. If it cannot be converted to round because of restrictions it should be converted to an equivalent flat oval size. 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. Step 5 select a size of square duct that has the same area.

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. This is a handy tool when deciding what size duct you want to use for your application. The equivalent diameter of a 300 mm x 500 mm rectangular duct can be calculated as. Approaches the efficiency of round duct.

That will at least give the duct. D e 1 30 300 mm 500 mm 0 625 300 mm 500 mm 0 25 420 mm. An aspect ratio of 1 is round duct. How to calculate duct sheet area duct quantity rectangle duct square duct round duct flat oval duct amazon.

2001 ashrae fundamentals p. When a designer sees rectangular duct on a drawing they should convert it to an equivalent round size if possible. Rectangular to equivalent circular duct calculator. Equivalent duct calculator round vs rectangular.