Rectangular Ducts
01 / 04Custom HVAC duct
SafeFaber delivers precision custom sheet metal HVAC ductwork and OEM manufacturing for commercial ventilation, cleanrooms, and heavy industrial systems. Built strictly to your engineering drawings with reliable dimensional accuracy and dependable global shipping.
- CNC laser cutting and automated panel forming
- Galvanized, stainless steel, and aluminum alloys
- Custom rectangular, spiral, and heavy industrial ducting
Custom Sheet Metal HVAC Ducts
SafeFaber manufactures fully custom sheet metal HVAC ducts in any size, gauge, and geometry. Whether you need rectangular ductwork, spiral round sections, or custom transitions, we engineer every component to fit your building layout without on-site modifications.
As an experienced custom hvac duct specialist, we provide end-to-end OEM contract production. Global buyers rely on our China manufacturing facilities to transition smoothly from initial rapid prototyping to recurring bulk volume shipments.
Every duct run passes strict pressure checks, seam integrity audits, and finish inspections. Partner with a dependable hvac duct manufacturer that delivers high-precision metal fabrication on schedule and within budget.
Any shape and size
Rectangular, spiral, oval, transitions, and heavy-duty fittings built to your exact print specifications.
Tight tolerances
CNC laser cutting and automated panel bending ensure seamless airtight connections and structural integrity.
Certified quality
Galvanized, stainless steel, and aluminum construction tested for air leakage and industrial corrosion resistance.
Standard & Custom Alloys
Galvanized, 304/316 SS & Aluminum
Leakage & weld inspection on all custom runs.
Core duct types & features
Engineered sheet metal hvac duct systems manufactured in galvanized, stainless steel, and aluminum alloys for balanced airflow performance and rigid structural life.
Custom gauges & connection styles available
Fabricated to order with TDC, slip & drive, or welded angle ring flanges.
Standard production workflow
From design verification through precision fabrication, every phase moves through verified quality gates before handover.
Drawing Review
DFM & engineering review
Cutting
Fiber laser & punch cutting
Sealing
PU gasket & surface prep
QC
CMM & dimension signoff
Delivery
Export crating & logistics
Material & finishing options
Select the exact alloy, thickness, and protective surface for your metal ventilation duct runs and custom precision sheet metal assemblies.
Key Performance
Cost-effective, reliable corrosion barrier, excellent formability.
Target Applications & Environments
- General HVAC systems
- commercial metal ventilation duct runs
- industrial air handling
- cost-sensitive ductwork.
Related reading: galvanized vs galvannealed steel
Key Performance
Superior acid and moisture resistance, sanitary cleanability, high tensile strength.
Target Applications & Environments
- Corrosive or hygienic environments
- food processing facilities
- chemical exhaust
- pharmaceutical cleanrooms.
Key Performance
One-third the weight of steel, non-magnetic, natural atmospheric corrosion defense.
Target Applications & Environments
- Lightweight duct assemblies
- marine and coastal installations
- rooftop ventilation
- outdoor enclosures.
Key Performance
Custom RAL color matching, UV-resistant coating, scratch-resistant decorative finish.
Target Applications & Environments
- Visible exposed ductwork
- modern architectural spaces
- commercial interiors
- brand-aligned facilities.
Need custom gauge sizing or certified surface treatments?
We fabricate custom ventilation ductwork, transitions, and fittings to ASTM, SMACNA, and ISO standards. Related reading: sheet metal thickness and gauge
Product advantages
From demanding HVAC sheet metal ductwork to industrial machine enclosures, SafeFaber applies tight-tolerance fabrication to ensure structural integrity and rapid site assembly.
Precise dimensions
Laser cut and CNC formed within ±0.1mm tolerances for predictable assembly.
Excellent sealing
Airtight seam welding and custom gasket channels that prevent leakage under pressure.
Corrosion resistance
Premium galvanized, stainless steel, and powder-coated finishes built for harsh duty.
Easy installation
Pre-punched flange holes and interlocking seams minimize on-site labor and alignment time.
Custom shapes
Tailored transitions, elbows, offsets, and multi-branch geometries fabricated to CAD spec.
Consistent quality
Standardized ISO-verified production runs ensure identical fit from prototype to batch delivery.
Application Scenarios
High-precision sheet metal assemblies and welded structural components engineered for critical airflow, containment, and ventilation applications.
Ductwork Fabrication Scope: Shapes, Gauges and Joint Types
Rectangular, Spiral and Fittings
We fabricate sheet metal ductwork in rectangular, round, spiral and flat-oval forms, plus elbows, transitions, tees and reducers. Material choices include galvanized, stainless and aluminum sheet. Finish options cover mill, hot-dip galvanized, powder coat and passivated surfaces, so each sheet metal duct suits indoor, outdoor or corrosive air-handling duty.
Gauge Selection by Duct Size
Duct size and pressure class set the gauge. Small low-pressure runs typically use 26 to 24 gauge, while wide or high-pressure sections move to 22, 20 or 18 gauge, often with cross-breaking or reinforcement. Our engineers confirm the gauge for each industrial ductwork fabrication order against your drawings and the applicable SMACNA schedule.
Joint Types, Flanges and Sealing
Transverse joints use TDF flanges, slip-on connections or angle flanges, chosen for duct size, pressure class and installation access. We seal every joint with gaskets and duct sealant, and add corner pieces and cleats where needed, so assembled runs stay airtight and install quickly on site.
For technical capability detail, see our HVAC sheet metal fabrication capabilities. Spiral duct is produced through roll forming for spiral duct.
Frequently Asked Questions
Find clear answers on production capabilities, material selection, sealing standards, and order fulfillment.
Have a custom technical inquiry?
Send your STEP/CAD drawings or talk directly with our engineering team.
Related Services & Products
Explore precision manufacturing capabilities, custom enclosure systems, and sheet metal gauge & thickness standards built to your project specs.
Request a custom fabrication quote
Submit your CAD drawings or technical specifications, and our engineering team will return a detailed manufacturing estimate within 24 hours.
Send drawings for custom duct quote
Custom rectangular, spiral, heavy-gauge welded, and stainless steel ductwork built to strict SMACNA standards.
24-hour turnaround
Detailed DFM analysis and fixed-cost quotations delivered within one business day.
Strict confidentiality
NDAs signed before review. All technical drawings and IP remain strictly secure.
Any file format
Submit STEP, IGES, DXF, DWG, PDF or SolidWorks files for instant quotation.