2024-09-20 00:00:00 The Sheet Metal / HVAC Pro Calc was designed for and with one of the nation’s largest industrial training organizations for skilled sheet metal and HVAC construction tradesmen. If you were trained by ITI there's a good chance you learned on the handheld version of this calculator -- if not, maybe you should have been! The Calculated Industries Sheet Metal HVAC Pro's advanced construction math functions are easy to learn and can solve the most challenging calculations. Boost accuracy, cut costly errors and upgrade training along with job performance for greater productivity.