Hvac Duct Design Calculator

Guide for how to design a ductwork system.

Hvac duct design calculator.

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. Hvac ductwork design hvac calculations performed by hvac professionals w over 120y. The model applies to system up to 60 feet from unit to register. In wg duct tel.

Full worked example included with cfd simulations to optimise your design to ensure the highest energy efficiency. Friction rate velocity friction rate. 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. Using an hvac duct sizing calculator.

Refer to the links on the left for more information. Below is a simple model for determining duct sizes. Hvac how to size and design ducts. Enter duct airflow cfm duct velocity fpm duct length and the number of bends.

Read round duct diameter inches and friction loss per 100 of duct inches of water. Duct sizing duct calculation duct design energy efficient ductwork design. Convert rectangular duct to round equivalent. 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.

Metal ductboard flex size 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. Include fittings in the duct tel enter either. 9 greyridge farm court stony point ny 10980.

Q ka t1 t2 l btu hr eq 1 where. Design cfm 4 cfm 6 cfm 8 cfm 10 cfm 12 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12. We know our stuff call today. Sheet metal duct friction loss calculator.

L the thickness of the wall in inches.