If you are an HVAC engineer, contractor, or design-build professional who uses a Mac, you’ve likely encountered a frustrating roadblock: The McQuay Duct Sizer (now part of Daikin Applied) does not have a native macOS version.
For over two decades, the McQuay (Daikin) Duct Sizer has been a staple tool in the Windows ecosystem. It is a free, lightweight, and remarkably accurate program for sizing ductwork based on friction loss, velocity, and flow rate. Yet, for the growing legion of HVAC professionals who prefer Apple hardware, running this tool requires ingenuity. mcquay duct sizer for mac
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This article explores the history of the McQuay Duct Sizer, why it never came to Mac, how you can run it today, and what native macOS alternatives exist. Before diving into the Mac dilemma, let’s acknowledge the tool itself. Originally developed by McQuay International (a pioneering HVAC manufacturer), the Duct Sizer was released as a freeware Windows application. Its goal was simple: help engineers quickly size round and rectangular air ducts using the equal friction method or static regain. Yet, for the growing legion of HVAC professionals