Free Exclusive Duct Design Software Jun 2026

The rise of and WebAssembly is changing the equation. Within five years, we may see a truly free, browser-based duct design tool that rivals paid software. A startup could offer:

These are not design tools but sizing wizards . Examples include apps and basic HVAC calculators on engineering portals.

Finding reliable can be the difference between a high-performing HVAC system and one plagued by noise, hot spots, and energy waste. While professional BIM (Building Information Modeling) suites can cost thousands, several powerful free tools—ranging from online "ductulators" to feature-rich trial versions—are available for engineers and DIY enthusiasts alike. Top Free Duct Design and Sizing Tools 1. Quick Calculation "Ductulators"

: A modern, web-based version of the traditional physical duct wheel. It calculates velocity, pressure drop, and friction factors for both circular and rectangular ducts.

: Also by Autodesk , this offers a free version for non-commercial, home-based projects. It provides more advanced 3D modeling capabilities for complex HVAC systems.