Software by Design Master Software, Inc.

Design Master HVAC is an integrated HVAC building design and drafting program for AutoCAD. Features include 2D and 3D ductwork drafting, ductwork sizing, pressure drop calculations, and building load calculations.

Design Master Electrical is an integrated electrical building design and drafting program for AutoCAD. Features include panel schedule, circuiting, feeder sizing, fault current calculations, voltage drop calculations, and photometrics.