Custom ducting for complex airflow routes and tight assembly spaces.
From curved passages and branched ducts to flanged connections and integrated mounting features, GPT Precision supports custom environmental control system (ECS) duct projects through drawing-based manufacturing review.
＋Custom ECS duct assemblyProduct photograph to be added
We evaluate polymer 3D printing, sheet metal fabrication and hybrid construction according to your geometry, material requirements, quantities and intended application.
Whether you need a fit-check prototype, a functional test article or a replacement component, we help establish a manufacturing scope around the interfaces, operating conditions and acceptance requirements that matter.
Built Around the Airflow Route and Assembly
An ECS duct must provide the required air path while fitting the available installation space. Complex geometry is only one part of the challenge—connections, supports, accessibility and the finished assembly also influence manufacturing decisions.
Complex Airflow Passages
Bends, branches and changing cross-sections help route air around surrounding equipment and structures. Internal geometry, wall construction and access for cleaning or finishing influence the manufacturing approach.
Precision Interfaces
Flanges, sealing faces, mounting points and inserts connect the duct to adjacent components. Their dimensions, orientation and surface requirements guide manufacturing and any necessary finishing operations.
Installation & Maintenance Access
Fastener clearance, mounting supports and removal paths matter alongside the installed geometry. Where appropriate, designed section joints can simplify assembly, cleaning or future replacement.
Compare Manufacturing Options
Different duct geometries and operating requirements call for different manufacturing approaches. GPT Precision reviews candidate processes against the complete component, including materials, joining, finishing and inspection.
＋Printed duct componentProduct photograph to be added
Polymer 3D Printing
For complex internal passages and frequently revised designs.
FDM and SLS can be considered for curved passages, branching networks and integrated features where conventional tooling or assembly would be less practical.
Engineering considerations:
Material grade and process compatibility
Build envelope and orientation
Internal access, cleaning and support or powder removal
Wall construction, finishing and leakage requirements
Printed parts intended for functional evaluation require material and performance review beyond geometric fit.
＋Formed metal duct sectionProduct photograph to be added
Sheet Metal Fabrication
For formed sections and designs suited to metal construction.
Cutting, forming and joining methods can be considered for relatively simple sections, longer duct runs and established fabricated assemblies.
Engineering considerations:
Material thickness and forming geometry
Seams, joints and joining access
Flange position and dimensional control
Tooling requirements and design changes
The complete fabricated assembly, rather than the individual formed sections alone, determines manufacturing suitability.
＋Hybrid duct assemblyProduct photograph to be added
Hybrid Construction
For components that benefit from more than one manufacturing process.
Printed or formed duct sections can be combined with machined flanges, inserts, brackets or other components where different features require different manufacturing methods.
Machined interfaces may provide controlled mating dimensions and sealing surfaces where the design requires them.
Engineering considerations:
Interface tolerances and joining methods
Sealing and thermal movement
Assembly sequence and accessibility
Inspection and responsibility for the finished assembly
Engineering Considerations for ECS Ducting
The CAD model defines the geometry. Operating conditions and acceptance requirements determine which features need particular attention during manufacturing.
Airflow Path & Pressure Loss
Flow rate, allowable pressure drop and operating range are important design inputs.
Bends, branch junctions, section changes and internal surface conditions can affect flow resistance and distribution. Where these characteristics are critical, identify the passages and surfaces that need to be maintained during manufacture.
Airflow performance analysis and testing responsibilities must be established separately. Manufacturing review does not, by itself, validate aerodynamic performance.
Illustrative duct route with inlet, outlet and an internal routing line.Concept illustration · not a production photograph · not to scale
Walls, Bends & Transitions
Wall thickness, transitions and branch intersections should be evaluated against the selected material and manufacturing process.
For printed components, build orientation, accessible internal regions and finishing requirements may affect the achievable construction.
For formed components, bend geometry, seams and joining methods may introduce different manufacturing constraints.
Interfaces & Dimensional Control
Mating faces, flange orientation, mounting-hole patterns and insert positions establish how the duct connects to the surrounding assembly.
Specify critical dimensions, datum references and surface requirements on the drawing. Where machining or secondary finishing is needed, its accessibility and sequence should be considered during manufacturing planning.
Temperature, Vibration & Support
Provide normal and peak temperatures, exposure duration, mounting loads, vibration and relevant environmental conditions.
Material selection and construction should account for thermal movement, support locations, handling and the loads transferred through joints and mounting features.
When Part Consolidation Makes Sense
Complex duct assemblies may contain multiple bends, branches, flanges and mounting features connected through separate manufacturing and joining operations.
Combining selected features can simplify the assembly, but fewer parts do not automatically mean lower total cost or better performance.
Concept illustration · candidate layouts, not a verified redesign
Integrate Features Where Practical
Additive manufacturing may allow selected branches, mounting bosses or support features to be incorporated into a single component.
Compare the proposed design with the original assembly to assess potential reductions in tooling, joining, handling and inspection effort.
Preserve Access & Replaceability
Some sections are better kept separate.
Designed joints may improve installation clearance, internal cleaning, inspection or replacement of individual components.
Evaluate consolidation against the finished assembly—including sealing, accessibility, serviceability and verification—not simply the component count.
Materials, Sealing & Verification
Material selection must reflect the actual operating environment and the finished component.
A published material property does not automatically demonstrate the performance of a manufactured duct. Processing, geometry, joints, surface treatment and assembly conditions may affect the result.
Sealing & Leakage Requirements
An as-printed wall should not be assumed airtight.
Where leakage limits apply, define the operating pressure or vacuum, test medium, allowable leak rate, test duration and fixture conditions.
Any coating, impregnation, joining or other sealing treatment should be evaluated for the selected geometry and material. The required verification and responsible testing party must be agreed before manufacture.
Dimensional Inspection
Inspection requirements are established around the drawing and the features that control assembly fit.
Typical inspection priorities include:
Inlet and outlet dimensions
Flange position and orientation
Critical mating and sealing interfaces
Mounting locations
Accessible internal features where dimensional checks are required
Measurement methods, sampling and reporting requirements are confirmed for the project.
Functional & Environmental Verification
Leakage, pressure, airflow, vibration and temperature testing may be necessary depending on the intended application.
These evaluations require defined test methods, conditions and acceptance criteria. The project scope must identify which activities, if any, are undertaken by GPT Precision, the customer or an agreed test provider.
Functional and environmental testing should not be assumed to be included in standard dimensional inspection.
Material & Compliance Documentation
Identify applicable material specifications, traceability requirements, supporting records and programme-specific acceptance criteria at the enquiry stage.
Flammability data should relate to the selected material grade and its stated test conditions. Such data does not automatically establish compliance of the finished duct.
For aircraft-related projects, manufacturing feasibility and any supply scope must be reviewed against the customer's design specifications, supplier-qualification and approval requirements. Manufacturing feasibility alone does not establish flight-hardware approval.
New Designs & Replacement Ducts
ECS duct projects may begin with a new digital design or an existing physical component. Each starting point requires different information and engineering review.
＋Fit-check duct in an assemblyProduct photograph to be added
New Designs & Development Projects
Start with the CAD model, engineering drawing and surrounding assembly.
A fit-check prototype can help evaluate routing, clearance, mounting and installation access before progressing to a more representative functional article.
Where functional performance is part of the evaluation, material, construction and test conditions must be defined accordingly.
＋Existing duct and mating interfacesProduct photograph to be added
Existing & Replacement Ducts
A damaged, worn or unavailable duct may provide a starting point for replacement manufacturing.
Share available drawings, photographs, known dimensions, mating components and operating history.
Measurement or geometric reconstruction can be considered where suitable source data is unavailable. Wear, deformation and damage must be distinguished from the intended geometry.
Changes to material, stiffness, joints or manufacturing process require review against the original application and applicable design responsibilities.
From Drawing Review to Manufacturing
A clear project definition connects the design revision, manufacturing approach and acceptance requirements.
Submit Your Design
Provide CAD models, drawings or existing-part references, along with the intended application, quantity and target delivery date.
Confirm the proposed scope, responsibilities and quotation schedule following engineering review.
Manufacture to the Agreed Design
Proceed using the agreed drawing revision and construction requirements.
Where installation uncertainty justifies it, a fit-check sample or other approval stage can be included before the next manufacturing step.
Inspect & Deliver
Complete the specified dimensional inspections and any separately agreed verification activities.
Provide the required inspection or material records within the confirmed project scope.
Frequently Asked Questions
Can you manufacture ECS ducts from customer CAD models?
Yes. GPT Precision reviews customer CAD models and engineering drawings to assess manufacturing options. Include the critical interfaces, material requirements, operating conditions and expected quantity.
Are 3D-printed ECS ducts airtight?
Not necessarily. Airtightness depends on the material, process, geometry and finishing method. Where leakage limits apply, an appropriate sealing and verification approach must be established for the specific component.
Can a sheet-metal duct assembly be replaced with a printed component?
Potentially, in whole or in part. Suitability depends on geometry, operating conditions, interfaces, material requirements and any applicable approval restrictions. Hybrid construction may also be considered.
How large can an ECS duct be?
Single-piece dimensions depend on the selected manufacturing process, equipment and geometry. Longer ducts may be divided into sections where joining, sealing, support and installation requirements permit.
Are printed ECS ducts suitable for aircraft applications?
Suitability must be assessed against the applicable aircraft programme requirements, including material specifications, performance criteria, supplier qualification and approval responsibilities. A manufacturable component is not automatically approved for aircraft installation.
Can you start a replacement project without drawings?
An initial enquiry can begin with photographs, known dimensions and an existing sample. Measurement, reconstruction, drawing preparation and design responsibilities are reviewed before a manufacturing scope is agreed.
Does material flammability data certify the finished duct?
No. Material data supports selection under the stated test conditions. Finished-part compliance may require additional evidence, testing or approval according to the application.
What determines quotation and delivery timing?
Geometry, material, manufacturing complexity, quantity, finishing, inspection and documentation requirements all influence the schedule. Share your target date so the expected quotation and delivery timelines can be assessed after initial engineering review.
Discuss Your ECS Duct Project
Start with the airflow route, the interfaces and the operating conditions.
Whether you are developing a new duct, evaluating a manufacturing alternative or replacing an existing assembly, GPT Precision can review your requirements and help define a practical manufacturing scope.
Design Files
CAD models, engineering drawings and revisions, inlet and outlet geometry, surrounding assembly details, mounting locations and existing-part references.
Operating & Acceptance Requirements
Flow rate, allowable pressure drop, temperature, pressure or vacuum, leakage limits, material specifications and applicable testing or approval requirements.
Project Details
Quantity, development stage, target date, inspection documentation and responsibilities for assembly and functional verification.
