Mcquay Duct Sizer ^new^ Jun 2026

The McQuay Duct Sizer is an . While the interface looks dated (resembling Windows 95/98 software), its calculation engine is trusted, accurate, and lightweight. For HVAC engineers who need a standalone desktop application that loads instantly without the bloat of full Building Information Modeling (BIM) software, it remains a top choice.

The calculations are based on standard ASHRAE fundamentals. You can adjust roughness factors for different materials (galvanized steel, fiberglass duct board, flex duct, etc.), which is crucial for accurate friction loss calculations. mcquay duct sizer

The program is extremely small (often less than 5MB). It opens instantly, even on older computers. Unlike modern web-based sizers that require an internet connection or heavy CAD software that takes minutes to load, the McQuay Duct Sizer is a "click and run" tool. The McQuay Duct Sizer is an

The is a widely used, lightweight software tool designed for HVAC engineers and MEP (Mechanical, Electrical, and Plumbing) professionals to accurately calculate duct dimensions for commercial and industrial buildings. Originally developed by McQuay and now supported by Daikin Applied , this digital calculator replaces traditional manual charts to help optimize system performance and energy efficiency. Key Features and Capabilities The calculations are based on standard ASHRAE fundamentals

The software simplifies complex fluid dynamics into a user-friendly interface. Key features include: Design of HVAC Central Air Conditioning System - IJRASET