The program allows performing the calculation of surfaces of ducts and their components, determining the quantity of flanges, and generating a duct specification.
Now the whole calculation are readily available for you, perform calculation anywhere: in the workshop, at a construction site, in negotiating, in a transport, office etc.
For the program to work, you need an Internet connection.
This program is also available online for PC: http://www.softhvac.ru/ductwork-surface