HVACsimular provides an efficient way to design HVAC ducting systems directly on AutoCAD LT and AutoCAD. Inputs to the program are single line path of duct system and flowrates at air terminals. Program sizes duct system either by equal friction method or static regain method and draw complete 2D drawing. Also program outputs complete material list and system pressure loss. Both SI and Imperial units are supported. Round and rectangular ducts can be designed together. No LISP enabler is needed for AutoCAD LT. In short, a large duct system with 200 air terminals can be designed in few minutes using HVACsimular.
More info at www.hvacsimular.com