Ductsize lets you create a complete duct system from start to finish, and gives you control over every aspect of the design. You can let the program size all the ducts for you (using three different sizing methods), or enter your own sizes to analyze an existing design. Or you can do any combination of the two, where you specify the duct sizes through tight areas where there is little room for ductwork, and let the program calculate the sizes everywhere else. If you are an engineer or HVAC designer who wants to step up to the ultimate in a duct sizing program, then Ductsize is for you.
