Hvac Duct Design Calculator

Read round duct diameter inches and friction loss per 100 of duct inches of water.

Hvac duct design calculator.

In wg duct tel. Sheet metal duct friction loss calculator. Refer to the links on the left for more information. Continuing education and development inc.

Q ka t1 t2 l btu hr eq 1 where. Metal ductboard flex size by. Hvac ductwork design hvac calculations performed by hvac professionals w over 120y. Include fittings in the duct tel enter either.

Guide for how to design a ductwork system. Enter duct airflow cfm duct velocity fpm duct length and the number of bends. Duct sizing duct calculation duct design energy efficient ductwork design. Your overall ducting size comes from combining the size cfm and friction loss of your home meaning it ends up being a pretty complicated calculation.

Convert rectangular duct to round equivalent. Heat conduction and thermal resistance for steady state conditions and one dimensional heat transfer the heat q conducted through a plane wall is given by. Because of the complexity of designing duct systems we highly recommend using the acca manual d for sizing ductwork or consulting a professional hvac contractor. Below is a simple model for determining duct sizes.

The model applies to system up to 60 feet from unit to register. Using an hvac duct sizing calculator. Because of this hvac professionals and amateurs alike typically don t calculate the final hvac ducting size by themselves. 9 greyridge farm court stony point ny 10980.

Hvac calculations and duct sizing gary d. L the thickness of the wall in inches. Full worked example included with cfd simulations to optimise your design to ensure the highest energy efficiency. Flex duct 05 on most metal duct calculator round metal pipe 06 on most metal duct calculators field duct sizing chart rectangular sheet metal duct 07 on most metal duct calculators duct size duct height net inside dimension in inches.

Design cfm 4 cfm 6 cfm 8 cfm 10 cfm 12 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12.