Top 10 Best Duct Design Software of 2026

SMACNA Ductulator is built around duct sizing methodology with inputs for airflow, duct type, and equivalent fitting influence so friction and velocity pressure driven results can be recomputed quickly. Output reporting emphasizes clear stepwise sizing results and pressure readouts that can be reused across design iterations. It fits teams that already standardize on SMACNA compliance outputs and want repeatable calculations in a single tool.

A tradeoff is limited reach beyond duct sizing outputs, since it does not substitute for full BIM coordination or model exchange workflows like IFC or gbXML. It is most useful when balancing damper scheduling inputs and final duct sizes need to be checked early, then handed off for downstream drafting work.

Design Master HVAC focuses on duct sizing work that drives downstream outputs such as system breakdowns, duct element schedules, and exportable drawing content. It supports rectangular ductwork workflows more directly than round-only utilities, which matters when projects require extensive cross-section variants and fitting accounting. The tool is also oriented toward plan-set production, so it suits engineers preparing repeated layouts across zones and floors.

A key tradeoff is that advanced BIM coordination often depends on how the shop draws are consumed downstream rather than a deep, bidirectional model exchange. Design Master HVAC fits best when the primary deliverable is duct sizing documentation and fabrication-ready documentation, and when coordination happens through drawings and schedules rather than live model syncing.

MagiCAD for Revit focuses on turning Revit duct layouts into coordinated design outputs, including placement logic for fittings and duct accessories and downstream documentation sourced from the model. The automation uses Revit element relationships, so edits to runs or connectors can propagate through connected components and keep schedules aligned. This reduces manual rework when routing changes occur during coordination cycles.

A tradeoff is that MagiCAD automation and documentation quality depends on consistent Revit families and connector setups used in the project template. It fits best when teams already standardize on Revit MEP naming, system types, and duct sizing rules, because governance and repeatability depend on those inputs.

Autodesk Revit is the duct design option in this lineup that anchors ductwork inside a BIM-native model built for coordination. Its Revit MEP workflows support system objects, routing rules, and clash-aware placement when duct geometry must stay consistent with the building model.

Duct sizing and documentation can be driven through Revit’s parametric elements, schedules, and connected project standards, with export paths for downstream coordination. Revit’s strengths show up when duct layout, supports, and coordination artifacts must stay synchronized across disciplines rather than living as standalone duct-only calculations.

Carmel Software Duct Sizing calculates duct dimensions from entered flow targets using friction loss logic and fitting loss assumptions. It supports rectangular and round duct sizing workflows geared toward HVAC system design deliverables.

The workflow centers on producing sized duct runs and associated pressure balance inputs for downstream detailing. Output formats and exchange options determine how well the sizing results carry into drafting or BIM coordination steps.

McGraw-Hill Duct Sizer is a duct design calculation tool built around a guided duct sizing workflow rather than a full CAD or BIM authoring environment. It produces sizing results using friction loss modeling and fitting-related assumptions needed for HVAC duct runs.

The software is oriented to repeatable sizing outputs for common duct forms and project documentation needs, including exportable outputs from the calculation session. It is distinct for the way duct sizing decisions are captured as step-by-step inputs rather than left as isolated spreadsheet math.

Lennox Duct Calculator differentiates itself by bundling Lennox-focused duct sizing and selection guidance into a calculation workflow tied to HVAC equipment context. The calculator supports common duct sizing tasks like sizing runs, evaluating friction loss inputs, and working with typical duct geometries for design handoffs.

It also produces outputs intended for quick review rather than a deep BIM coordination pipeline. For teams that need Lennox-aligned numbers fast, it reduces the manual steps between assumptions and duct dimensions.

Trane Ductulator is a duct design tool from Trane that focuses on duct sizing workflows with built-in friction loss calculation and fitting loss modeling. It supports psychrometrics-free duct selection tasks by computing pressure requirements, then generating pressure and velocity outputs used for downstream balancing decisions.

Duct geometry handling is oriented around common rectangular and round ductwork layouts, with outputs structured for coordination with HVAC design documents. The software also emphasizes repeatability for standard duct runs through saved inputs and repeatable calculation sets rather than full simulation depth.

Plusspec Ducting generates HVAC duct runs and fittings from rule-based duct design inputs, then computes pressure loss using its internal ducting calculation workflow. It supports SMACNA-style sizing inputs and workflow outputs meant to feed downstream fabrication and coordination tasks like DWG-based documentation.

The tool focuses on duct sizing and layout automation rather than simulation-grade CFD. Export paths emphasize interoperability through common CAD model outputs and drawing-ready data from the duct schedule.

Elite Ductsize from elitesoft.com is a duct design and duct sizing tool used to generate ductwork sizing outputs from input airflow and system conditions. Its workflow centers on sizing outputs tied to selectable sizing inputs and outputs that support rectangular and round ductwork selection.

Elite Ductsize is most effective when standard worksheets drive repeatable calculations and when drawings are secondary to getting correct size and pressure loss results quickly. The product is best evaluated in practice for how it fits the surrounding CAD or BIM pipeline because the review focuses on design calculation coverage rather than model exchange depth.