DuctCalc is the easy way to compile a duct material take-off. You can input a project using sheet metal as the material, the program will do the entire math for you and calculated pounds of metal, gauge of metal required, feet of slips and drives, square foot of duct wrap and the number of hangers required to hang the duct. You've got your project bid completed and your customer says how much is the cost if we did the job with fiberglass.

Design Master HVAC is an integrated HVAC building design and drafting program that runs on top of AutoCAD. Drafting features include single-line and double-line 2D ductwork with automatic fittings and 3D ductwork. Duct sizing calculations include constant pressure drop, constant velocity, and static regain. Pressure drop in the duct system can also be calculated. Building load calculations are done using the ASHRAE CLTD method.

A useful tool for HVAC engineers.<br> <br> Psychrometric:<br> Pressure/altitude can be inputed. Calculate and draw process/mixture, once/twice recycle in summer/winter.<br> Export chart as emf, bmp, Jpeg file, print/clipboard copy, plot setting supported.<br> <br> Duct Calculator:<br> Include thermal and adiabatic layer effect.<br> <br> 30 days trial, free upgrade.

ENGINEERING POWER TOOLS is powerful productivity software for professional engineers. Over 70 programs and data tables are integrated into one package. The programs solve a wide variety of common engineering problems quickly and easily. Eliminates wasted time, hunting for the right formula and performing repetative manual calculations. Categories include Math, HVAC, Mechanical, Electrical, Materials, and Structural. Easy to use. Networkable.

LITIO is a sheet metal program that calculates flat (unfolded) sheet metal developments of ducts, rectangle to round transitions, cylinders, cones, pipe intersections, connections, bifurcations, elbows, etc. For HVAC, hoppers, cyclones, dust extraction, ducts, conveying systems, silos, piping, etc. To draw your sheet metal developments directly in AutoCAD R2000 and later (no need of DXF convertions).