GITNUXSOFTWARE ADVICE
Construction InfrastructureTop 10 Best Duct Cad Software of 2026
Compare duct cad software options for HVAC and duct modeling, with tradeoffs for drafting workflows and tool capabilities like FastDUCT for Revit.
How we ranked these tools
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Framework: Features 40% · Ease 30% · Value 30%
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Bentley OpenBuildings Designer is the best pick for mid-to-large teams doing BIM coordination and fabrication-ready duct detailing because its coordination workflow links duct edits to model-based clash and discipline sync, cutting manual reconciliation, while FastDUCT fits teams needing fast, repeatable routing and parametric fitting detailing with drafting-ready outputs for shop work.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Bentley OpenBuildings Designer
Bentley’s coordination workflow ties duct edits to model-based clash and discipline synchronization, reducing manual drawing reconciliation.
Best for: Fits when mid-to-large projects need BIM coordination for duct detailing and fabrication outputs in one 3D workflow.
FastDUCT
Editor pickParametric fitting generation tied directly to duct layout rules for repeatable branch and transition detailing.
Best for: Fits when teams need quick duct routing, fitting detailing, and drafting output sets for shop production workflows.
MagiCAD for Revit
Editor pickModel-driven fitting generation that stays synchronized with Revit duct routing and fabrication drawing content.
Best for: Fits when mid-size fabrication teams standardize Revit-based duct layouts into repeatable fitting and shop outputs.
Comparison Table
Bentley OpenBuildings Designer
enterpriseBuilding design application with MEP modeling tools for duct layout and coordination.
Bentley’s coordination workflow ties duct edits to model-based clash and discipline synchronization, reducing manual drawing reconciliation.
Bentley OpenBuildings Designer targets duct and HVAC detailing teams that need Revit MEP coordination plus broader building-data workflows in one environment. It supports 3D duct routing and model-based documentation used for fabrication drawings, including discipline links and clash-driven rework loops.
OpenBuildings Designer also fits organizations that standardize duct construction details like flange detailing and branch tap geometry through reusable content and project templates. The practical difference versus general CAD is the emphasis on BIM interoperability and model-driven coordination rather than purely 2D duct drafting.
- +Strong BIM interoperability for coordinating duct layouts with other building models
- +3D duct layout supports collision detection workflows that reduce downstream rework
- +Model-driven documentation supports consistent fabrication drawings derived from the design
- +Reusable construction detailing helps keep flange detailing and transitions consistent
- –Duct-specific setup and content standards require deliberate configuration discipline
- –Pressure loss calculation workflows are not the strongest focus compared with dedicated HVAC sizing tools
- –SMACNA compliance controls depend on configured families and project conventions
- –AutoCAD DWX round-tripping can add cleanup steps for iterative duct routing
Best for: Fits when mid-to-large projects need BIM coordination for duct detailing and fabrication outputs in one 3D workflow.
FastDUCT
vertical specialistHVAC estimating and takeoff software that includes duct fitting databases and digital ductwork quantification tools.
Parametric fitting generation tied directly to duct layout rules for repeatable branch and transition detailing.
FastDUCT runs duct layout workflows that generate rectangular ductwork components and deliverables from a modeling-to-drafting process.
It focuses on drafting speed for fabrication outputs, including cut list style geometry and shop drawing inputs driven from the duct layout.
FastDUCT also supports fitting generation through parametric rules so branch connections and transitions can be created consistently.
The tool is positioned for teams that need faster turnarounds on duct route and detail sets rather than deep multi-discipline BIM authoring.
- +Fast duct routing to drafting pipeline for fabrication-ready drawings
- +Parametric fitting generation keeps connections consistent across projects
- +Focused workflow reduces friction for spool and detail output packages
- +Automation-friendly behavior for repeatable duct layouts
- –Limited evidence of deep BIM interoperability workflows for Revit coordination
- –Less suited to advanced simulation beyond duct sizing and detailing outputs
- –Automation depends on configuration discipline for fitting and detailing rules
- –Smaller extensibility surface than CAD-centric customization ecosystems
Best for: Fits when teams need quick duct routing, fitting detailing, and drafting output sets for shop production workflows.
MagiCAD for Revit
enterpriseMEP design software for Revit that supports HVAC duct routing, calculations, and model-based documentation.
Model-driven fitting generation that stays synchronized with Revit duct routing and fabrication drawing content.
MagiCAD for Revit performs HVAC duct and fittings generation directly inside Revit using a parametric fitting and routing workflow. The tool connects duct layout to fabrication-oriented output, including automatic fitting selection and drawing content geared toward shop coordination.
MagiCAD focuses on Revit MEP coordination workflows where routing decisions, fittings, and schedules stay synchronized in the same model environment. Its main value is automation of fitting generation and fabrication detail consistency without leaving the Revit authoring loop.
- +Generates duct fittings from Revit geometry with model-synchronized results
- +Automates fabrication drawings content tied to the duct network
- +Supports parametric fitting logic for repeatable rectangular ductwork outcomes
- +Keeps duct routing decisions and downstream schedules in the same Revit environment
- –Automation quality depends on clean Revit system setup and routing conventions
- –Pipe and duct edge cases can require manual intervention at fitting transitions
- –Heavy projects may need careful performance tuning during batch generation
- –Deep interoperability outside Revit depends on export and downstream toolchain
Best for: Fits when mid-size fabrication teams standardize Revit-based duct layouts into repeatable fitting and shop outputs.
Autodesk Fabrication CADmep
enterpriseFabrication CAD software for detailed HVAC, piping, and electrical ductwork modeling and shop drawing production.
Fabrication-oriented spool drafting and shop drawing generation tied to its duct and fitting workflow conventions.
Autodesk Fabrication CADmep is a duct CAD environment built for fabrication drawing workflows, with toolchains centered on building 3D duct layouts that convert into spooled drafting outputs. It supports fitting generation from its parametric fitting library and produces fabrication-friendly documentation such as shop drawings and spool sheets.
- +Spool and shop drawing drafting built around fabrication-standard duct workflows
- +Parametric fitting library drives consistent tap, transition, and flange detailing
- +Automation for duct routing, layout editing, and redraw propagation reduces manual rework
- +Strong IFC and BIM interoperability outputs for downstream coordination needs
- –Tight workflow conventions require careful setup of configuration for each job type
- –Advanced collision detection is not as quick as general CAD clash tools
- –Pressure loss and fitting performance analysis depth depends on configured workflows
- –Large project regeneration can feel slow versus lighter duct editors
Best for: Fits when fabrication-focused duct layout teams need repeatable spooling and fitting-driven drawing regeneration.
QuoteSoft Duct
vertical specialistDuct estimating software for HVAC contractors with digital takeoff and reporting features for sheet metal work.
Tight linkage between duct layout inputs and quote-ready outputs based on parameterized fittings and assemblies.
QuoteSoft Duct targets duct design workflows with automated quote generation tied to engineered duct layouts. The software focuses on structured duct routing outputs and fabrication drawing support for rectangular ductwork and related fittings.
- +Quote-linked duct design process reduces rework between layout and costing
- +Fitting library use supports consistent branch tap and transition detailing
- +Fabrication drawing workflow supports spool-style drafting outputs
- +Export pipeline supports coordination handoff to downstream drafting tools
- –Limited documentation of pressure loss calculation and SMACNA compliance automation
- –Automation depth depends on built parameter templates for each duct type
- –Collision detection and advanced 3D clash workflows are not a primary focus
- –Deeper BIM coordination depends on external tools for final reconciliation
Best for: Fits when teams need repeatable duct layout-to-drawing and quote output without heavy CAD scripting.
Elite Software Ductsize
SMBDuct sizing program using static regain, equal friction, or constant velocity methods.
Duct size and fitting selection driven by engineering inputs, then carried into generated duct layout and documentation outputs.
Elite Software Ductsize targets duct sizing and routing workflows with a calculation-first approach that feeds downstream layout and drafting needs. The workflow centers on SMACNA-aligned sizing logic and selection of duct and fittings based on project inputs, then generates documentation outputs suitable for fabrication drawing packages.
- +Calculation-driven sizing workflow reduces manual duct selection work
- +SMACNA-aligned logic supports consistent sizing decisions across projects
- +Exports target drafting and coordination needs for fabrication-focused deliverables
- +3D layout generation supports clearer downstream clash and routing checks
- –Routing automation coverage is narrower than general-purpose duct CAD systems
- –Integration with Revit MEP workflows can require tighter process setup
- –Advanced detailing like flange and spools may still rely on CAD edits
- –Template customization for shop drawing stamps needs structured configuration discipline
Best for: Fits when HVAC teams need repeatable duct sizing and export-ready drafting outputs for fabrication drawings.
Trimble Stabicad
enterpriseRevit and AutoCAD based MEP detailing software that supports HVAC duct modeling and coordinated BIM production.
Dual-host authoring across Stabicad for Revit and Stabicad for AutoCAD.
Stabicad for Revit uses object-based MEP content for coordinated duct, pipe, and electrical systems. Stabicad for AutoCAD provides a DWG-based alternative for firms that do not author every project in Revit. The shared product family supports duct routing, equipment connections, schedules, and calculation outputs within established design environments.
- +Revit and AutoCAD editions support mixed-project environments.
- +Object-based MEP content preserves system relationships.
- +Automatic duct fitting placement reduces repetitive drafting.
- +Trimble Connect integration supports model exchange and review.
- –Primary authoring depends on Revit or AutoCAD installations.
- –Regional standards and manufacturer content require administrative setup.
- –Advanced calculations may require separate modules.
- –Interface density increases onboarding time for occasional users.
Best for: Fits when MEP contractors need coordinated duct design across Revit and AutoCAD projects.
AutoSPRINK FAB
SMBMEP fabrication software with HVAC sheet metal and duct fabrication capabilities for contractors and shops.
AutoSPRINK model data flows into sprinkler spool documentation and fabrication outputs.
AutoSPRINK FAB extends AutoSPRINK design data into fabrication documentation for fire sprinkler piping. The workflow supports spool-based production, fitting details, material takeoffs, and fabrication drawings without rebuilding the sprinkler model manually. Its strongest fit is a contractor operating an AutoSPRINK-centered design and shop workflow.
- +Converts AutoSPRINK design data into sprinkler fabrication outputs
- +Supports spool-based shop drawing preparation
- +Reduces duplicate entry between design and fabrication workflows
- +Provides sprinkler-specific material and cutting information
- –Does not design or model HVAC duct systems
- –Lacks duct sizing and pressure loss calculation
- –Cannot replace AutoCAD or BricsCAD for general duct drafting
- –Depends on an AutoSPRINK-centered sprinkler workflow
Best for: Fits when sprinkler contractors need fabrication documentation from AutoSPRINK models, not HVAC duct design.
Wrightsoft Right-Suite
SMBHVAC design suite with load calculation, duct sizing, and duct layout modules.
The linked Right-J, Right-D, Right-S, and Right-CAD workflow carries shared project data from load analysis into duct documentation.
Right-Suite combines Manual J load calculations, Manual D duct design, Manual S equipment selection, and CAD drafting within one Windows application family. Right-CAD supports floor-plan drawing, duct routing, system sizing, and equipment placement, while the calculation modules use shared project information. The workflow suits contractors producing permit documents and design-build firms coordinating sizing with installation drawings.
- +Links Manual J loads with Manual D duct sizing and Manual S equipment selection.
- +Right-CAD combines floor-plan drafting with automatic duct sizing.
- +Supports room-by-room reports for permit and sales documentation.
- +Prevents repeated project data entry across Wrightsoft modules.
- –Public documentation does not present a broad automation API.
- –Advanced drafting workflows require learning Wrightsoft-specific commands and settings.
- –BIM coordination is narrower than dedicated Revit or fabrication applications.
- –Complex commercial projects may need separate detailing and fabrication software.
Best for: Fits when HVAC contractors need connected load calculations, equipment selection, and duct drawings for residential projects.
CYPEHVAC Ductwork
vertical specialistHVAC software focused on duct system design, load handling, and installation calculation workflows.
Engineering-driven duct geometry and detailing that ties routing inputs directly to fabrication-ready spool and drawing outputs.
CYPEHVAC Ductwork targets duct routing, fitting generation, and drawing output inside a CYPE workflow. It focuses on engineering-oriented duct layout rather than general CAD drafting, with structured inputs that drive rectangular ductwork geometry and detailing.
- +Structured duct routing inputs reduce manual drafting churn
- +Automated fitting generation keeps branch tap detailing consistent
- +Supports fabrication drawing sets derived from the 3D layout
- +Collision detection helps catch clashes during layout changes
- –Less flexible for custom AutoCAD-style duct edits
- –Limited BIM interoperability compared with Revit-first workflows
- –Automation depth depends on correct standard configuration
- –Fitting library coverage can require manual adjustments for edge cases
Best for: Fits when HVAC teams need repeatable duct routing with consistent fabrication drawings for rectangular ductwork.
Conclusion
After evaluating 10 duct cad software, Bentley OpenBuildings Designer stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Duct Cad Software
Duct CAD software in this guide spans sprinkler-focused fabrication output in AutoSPRINK FAB, residential load-linked duct documentation in Wrightsoft Right-Suite, and dual-host duct authoring across Revit and AutoCAD in Trimble Stabicad.
Teams that standardize on Revit-based fitting and fabrication drawing automation are covered via MagiCAD for Revit, while fabrication-spool drafting and fitting-driven regeneration are covered in Autodesk Fabrication CADmep. Other selections address BIM coordination workflows in Bentley OpenBuildings Designer, engineering-input routing into spool outputs in CYPEHVAC Ductwork, calculation-driven sizing and drafting exports in Elite Software Ductsize, and fast parametric fitting generation in FastDUCT and QuoteSoft Duct.
Duct CAD Software for 3D duct routing, fitting generation, and fabrication drawing workflows
Duct CAD software produces rectangular ductwork routing and then carries that geometry into fitting generation and fabrication-ready drawing output. The strongest picks in this set focus on repeatable detailing for branch taps, transitions, and flange requirements by tying drawings to the duct network or spool rules instead of leaving fittings as manual drafting edits.
AutoCAD and Revit-centered workflows diverge in this list. Trimble Stabicad supports mixed-project environments through dual-host authoring for Revit and AutoCAD, while MagiCAD for Revit stays synchronized with Revit duct routing so fittings and fabrication drawing content update alongside the duct model. Autodesk Fabrication CADmep emphasizes fabrication conventions by rebuilding spool and shop drawing sets through a parametric fitting library and fitting-driven workflow rules.
Duct CAD buying criteria for routing, fitting automation, and fabrication outputs
Duct CAD software becomes a documentation engine when it ties duct geometry to fitting generation and then regenerates fabrication drawings from that same network. Tools in this set separate projects by workflow shape, either anchoring output to sprinkler spool documentation, AutoSPRINK model data flows, or Revit or AutoCAD authoring rules.
Teams should prioritize automation surfaces that reduce manual drawing edits during branch tap detailing, transition detailing, and flange detailing. In this list, those automation surfaces show up as model-synchronized fitting generation in MagiCAD for Revit, parametric fitting libraries in Autodesk Fabrication CADmep, and routing-input driven spooling and shop drawing regeneration in Wrightsoft Right-Suite workflows.
Model-tied fitting generation that stays synchronized
MagiCAD for Revit generates duct fittings from Revit geometry and keeps results synchronized with Revit duct routing and fabrication drawing content. CYPEHVAC Ductwork ties routing inputs directly into fabrication-ready spool and drawing outputs with consistent branch tap detailing.
Spool and shop drawing regeneration built around duct workflows
Autodesk Fabrication CADmep builds spool and shop drawing drafting around fabrication-standard duct workflows and regenerates drawing sets using its fitting-driven conventions. FastDUCT routes ducts into a fabrication-ready drawing pipeline with parametric fitting generation tied to duct layout rules.
Connected sizing and equipment selection inputs for duct documentation
Wrightsoft Right-Suite links Manual J loads with Manual D duct sizing and Manual S equipment selection, then carries that data into Right-CAD duct drawings with automatic duct sizing. Elite Software Ductsize drives duct size and fitting selection from engineering inputs and then carries the results into generated duct layout and documentation outputs.
Coordination workflows for cross-discipline conflict reduction
Bentley OpenBuildings Designer links duct edits to model-based clash and discipline synchronization in a single 3D workflow. Trimble Stabicad supports dual-host authoring across Stabicad for Revit and Stabicad for AutoCAD for mixed-project environments.
Output linkage between design inputs and deliverables
QuoteSoft Duct links duct layout inputs to quote-ready outputs using parameterized fittings and assemblies, which reduces rework between layout and costing. AutoSPRINK FAB converts AutoSPRINK design data into sprinkler fabrication outputs and supports spool-based shop drawing preparation, which is a deliverables-first output path.
Choose by workflow ownership: model synchronization, fabrication spooling, or linked engineering inputs
The main fork is where the duct truth lives. MagiCAD for Revit and Trimble Stabicad keep duct networks synchronized through Revit-based modeling and mixed-project hosting, while Autodesk Fabrication CADmep and AutoSPRINK FAB center on spool and shop drawing conventions.
A second fork is how sizing and compliance logic enters the drawing set. Wrightsoft Right-Suite connects load analysis into duct sizing and equipment selection, while Elite Software Ductsize runs calculation-driven sizing that feeds export-ready drafting outputs. A third fork is how far automation goes beyond fitting generation into collision detection speed and pressure loss workflows, where Bentley OpenBuildings Designer focuses more on BIM coordination than dedicated HVAC sizing strength.
Map duct network ownership to the CAD host
Select MagiCAD for Revit when Revit duct routing is the source of truth and fittings must stay synchronized with Revit geometry and fabrication drawing content. Select Trimble Stabicad when teams need dual-host authoring across Revit and AutoCAD editions for mixed-project environments.
Pick fabrication-first tooling when spool drafting is the deliverable
Choose Autodesk Fabrication CADmep when fabrication-standard spool drafting and shop drawing regeneration are the core requirement for repeatable tap and transition detailing. Choose FastDUCT when duct routing needs to move quickly into a fabrication-ready drawing pipeline with parametric fittings.
Route engineering inputs into drawings when sizing is part of the workflow contract
Choose Wrightsoft Right-Suite when load analysis must connect to duct sizing and equipment selection, then flow into Right-CAD automatic duct sizing from connected project data. Choose Elite Software Ductsize when calculation-driven duct size and fitting selection must feed generated duct layout and documentation outputs.
Use BIM coordination tools when reconciliation time dominates
Select Bentley OpenBuildings Designer when duct edits must trigger model-based clash and discipline synchronization in a 3D coordination workflow. Select CYPEHVAC Ductwork when engineering-driven routing inputs must tie into fabrication-ready spool and drawing outputs with consistent rectangular ductwork detailing.
Confirm output linkage matches the downstream deliverable
Select QuoteSoft Duct when quote-ready outputs must be tied directly to duct layout inputs through parameterized fittings and assemblies. Select AutoSPRINK FAB when AutoSPRINK model data flows must convert into sprinkler spool documentation and fabrication outputs.
Who benefits from duct CAD automation for fitting generation and fabrication drawings
This set serves three distinct user profiles based on where duct work is authored and which deliverable dominates. Some teams need fabrication spooling rules and parametric fitting libraries, while others need model synchronization between duct routing and drawing content.
Teams also differ by whether sizing is a linked engineering process or a calculation-driven input step that feeds drafting output. The tools below match those differences through their named workflows, such as AutoSPRINK FAB fabrication documentation for sprinkler contractors and Wrightsoft Right-Suite load-linked duct drawing workflows.
HVAC duct fabrication teams focused on repeatable shop drawings
Autodesk Fabrication CADmep and FastDUCT deliver spool drafting and fabrication-ready drawing sets built on parametric fitting generation rules that keep connections consistent across projects.
Revit-first contractors who need fittings that update with duct routing
MagiCAD for Revit generates fittings from Revit geometry and automates fabrication drawing content synchronized with the duct network. Trimble Stabicad adds dual-host authoring support for teams moving between Revit and AutoCAD.
Residential workflow teams with load-to-duct documentation linkage
Wrightsoft Right-Suite links Manual J loads to Manual D duct sizing and Manual S equipment selection, then produces connected duct drawings through Right-CAD automatic duct sizing.
BIM coordination teams that treat duct edits as model-synchronized events
Bentley OpenBuildings Designer ties duct edits to model-based clash and discipline synchronization to reduce downstream drawing reconciliation time.
Teams running quote or estimate workflows alongside duct layout
QuoteSoft Duct reduces rework by linking duct layout inputs to quote-ready outputs using parameterized fittings and assemblies.
Common pitfalls when selecting Duct CAD Software for duct routing and fabrication documentation
Most selection failures come from picking a tool whose duct workflow conventions do not match the team’s authoring habits. Autodesk Fabrication CADmep and its fabrication-oriented spool drafting require careful configuration per job type, which can derail delivery when the team expects flexible manual CAD editing.
Other pitfalls come from assuming coverage that the tool does not emphasize in this set. AutoSPRINK FAB converts AutoSPRINK model data into sprinkler fabrication outputs and does not design or model HVAC duct systems, so it cannot replace duct sizing and pressure loss workflows for HVAC design.
Choosing a spool-first tool while the team relies on frequent manual duct edits
Autodesk Fabrication CADmep uses tight workflow conventions tied to fabrication-standard duct workflows, so teams should budget time for configuration discipline before relying on it for irregular duct edits.
Assuming sprinkler fabrication tooling can substitute for HVAC duct design automation
AutoSPRINK FAB focuses on sprinkler model data flows into sprinkler fabrication outputs and lacks HVAC duct sizing and pressure loss calculation, so it is not a drop-in replacement for duct CAD.
Picking a BIM coordination tool for pressure loss calculation depth
Bentley OpenBuildings Designer supports collision detection workflows via 3D coordination, but pressure loss calculation workflows are not its strongest focus compared with dedicated HVAC sizing tools.
Underestimating the Revit system setup dependency for model-synchronized fittings
MagiCAD for Revit automation quality depends on clean Revit system setup and routing conventions, so cluttered or inconsistent Revit routing can force manual intervention at fitting transitions.
Relying on automation APIs without validating automation surface breadth
Wrightsoft Right-Suite connected workflows exist through Manual J to Manual D and Right-CAD automatic duct sizing, but public documentation does not present a broad automation API for deeper programmatic integration.
How We Selected and Ranked These Tools
We evaluated automation depth from duct routing inputs into fitting generation and fabrication drawing outputs, with spool and shop drawing regeneration scoring higher when the workflow regenerated drawings based on shared duct network rules. Features drove 40% of the ranking because the strongest entries convert design geometry into fabrication deliverables with repeatable fittings and branch and transition detailing.
Ease and value each contributed 30% because teams need stable authoring steps for either Revit and AutoCAD hosting or configuration discipline for fabrication conventions. AutoSPRINK FAB separated itself in the final ranking by converting AutoSPRINK model data into sprinkler fabrication outputs and supporting spool-based shop drawing preparation, which matches the set’s strongest deliverable linkage case.
Frequently Asked Questions About Duct Cad Software
How does integration differ between Trimble Stabicad and Bentley OpenBuildings Designer for duct coordination?
Which tool supports connected load calculations feeding duct layout without retyping room data?
When do fabrication drawing workflows fit Autodesk Fabrication CADmep versus MagiCAD for Revit?
What tradeoff occurs if a team needs sprinkler fabrication outputs instead of HVAC duct modeling?
How does Elite Software Ductsize handle duct sizing compared with FastDUCT’s drafting-first approach?
Where does CYPEHVAC Ductwork fit best when output consistency matters for rectangular ductwork?
What breaks if a duct workflow depends on quote-ready parameterized outputs instead of drawing-first drafting?
Which tool is built for fabrication-oriented spool drafting tied to a parametric fitting library?
When does BricsCAD-based duct workflow support matter compared with Revit-first automation like MagiCAD for Revit?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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