ATLANTA — A new duct sizing calculator from ASHRAE and the Air Distribution Institute (ADI) allows HVAC air distribution system designers to more accurately size ducts, especially flex ducts under ...

In 1948, research by R.G. Huebscher established flow resistance for different shapes of ductwork at equal velocities, which allowed the creation of the duct-sizing calculator or “Ductulator” for ...

With duct work, it all starts with some basic calculations. To heat or cool a space, each room brings with it a certain cubic-feet-per-minute (CFM) air-flow requirement. Knowing the CFM for a room ...

Syska Hennessy Group, the international engineering firm, has launched an app called the Ductulator, which helps architects, owners, contractors, and mechanical engineers easily determine and specify ...

SAE International Journal of Engines, Vol. 11, No. 1 (February 2018), pp. 67-78 (12 pages) The power battery cooling system of a hybrid electric vehicle is composed of a fan and duct assembly with its ...