Top 10 Best Duct Sizer Software of 2026

Ductsize by Elite Software is a professional HVAC duct sizing application that calculates optimal duct dimensions using industry-standard methods like equal friction, static regain, and constant velocity. It supports round, rectangular, and flat oval ducts, handles complex branched systems with fittings and velocity constraints, and generates detailed sizing reports, diagrams, and printer-ready outputs. Ideal for engineers designing efficient, code-compliant HVAC systems, it integrates seamlessly with other Elite Software tools like HAP for comprehensive building design workflows.

Right-Ductsizer from Wrightsoft is a specialized duct sizing software designed for HVAC professionals to create efficient, standards-compliant duct systems for residential and light commercial applications. It supports multiple methodologies including constant friction, static regain, velocity, and reduced static methods per ACCA Manual D. The software generates detailed reports, sizing tables, and integrates with Wrightsoft's broader suite for load calculations and system design.

Duct Size from Price Industries is a free, web-based duct sizing calculator tailored for HVAC professionals to determine optimal rectangular and round duct dimensions. It supports key methods like equal friction, static regain, and constant velocity, incorporating airflow rates, velocities, and pressure losses per ASHRAE standards. The tool also handles fittings and provides quick sizing reports, ideal for preliminary design work.

Duct by AFDesign is a dedicated HVAC software tool designed for precise duct sizing calculations, enabling users to determine optimal duct dimensions based on airflow rates, velocity limits, and friction loss methods like equal friction or static regain. It supports rectangular, round, and oval ducts, along with a library of fittings and accessories for accurate pressure drop computations. The software generates detailed sizing reports, diagrams, and exportable data for integration into larger BIM or design workflows.

Duct Sizer from Daikin Applied is a free Windows-based software tool specifically designed for HVAC professionals to size air ducts accurately. It supports key methods like equal friction, static regain, and constant velocity, calculating dimensions for round and rectangular ducts based on airflow, velocity limits, and friction rates per ASHRAE standards. The tool generates detailed reports with diagrams, making it useful for preliminary duct design in commercial and industrial HVAC projects.

Carrier's Hourly Analysis Program (HAP) is a comprehensive HVAC software suite primarily designed for hourly building load calculations, energy analysis, and system design, with integrated duct sizing capabilities using methods like equal friction, static pressure regain, and velocity reduction. It allows users to model duct systems based on calculated airflows from detailed zone-by-zone load simulations, generating sizing reports and layouts. While versatile for full HVAC projects, its duct sizing is embedded within a broader toolset rather than being a standalone feature.

TRACE 3D Plus is a comprehensive HVAC system design and building energy modeling software from Trane that includes robust duct sizing capabilities as part of its whole-building simulation toolkit. It enables users to model complex duct networks, calculate airflow requirements from load simulations, and automatically size ducts based on friction rates, velocity limits, and ASHRAE standards. The tool provides detailed pressure loss calculations, equipment sizing integration, and optimization reports to support efficient HVAC design.

Revit by Autodesk is a powerful BIM platform with integrated MEP tools that enable precise duct sizing within 3D building models. It automates duct sizing calculations based on airflow rates, friction loss, and industry standards like ASHRAE, while supporting fabrication-level detailing. As part of a comprehensive design suite, it ensures duct systems dynamically update with model changes for coordinated engineering workflows.

H2X is a cloud-based engineering design software specialized for MEP systems, offering automated duct sizing, pressure loss calculations, and airflow distribution compliant with standards like ASHRAE and CIBSE. It enables users to model entire HVAC duct networks, integrate with Revit for BIM workflows, and generate detailed reports. While comprehensive for building services, its duct sizing is part of a broader platform rather than a standalone tool.

CYPE-DUCTS is a specialized module within the CYPE software suite for HVAC professionals, focused on the sizing, design, and analysis of air distribution ducts. It performs precise calculations for duct dimensions, pressure losses, and velocities based on international standards such as ASHRAE, RSE-M, and European regulations. The software generates detailed reports, fabrication drawings, and integrates with BIM models via IFC for seamless workflow in building projects.