In This Guide
Building a Profitable HVAC Duct Factory
Starting or expanding an HVAC duct fabrication factory is a significant investment — but with the right equipment, layout, and workflow, it can be highly profitable. The key is matching your equipment configuration to your target market, production volume, and available space.
At Preda Machine, we've helped over 500 companies set up HVAC duct factories on six continents. This guide distills that experience into a practical roadmap for building a profitable duct fabrication operation.
Quick Answer
A complete rectangular duct factory needs: an auto duct line (Line 3 or 5), Pittsburgh lockformer, TDF flange former, TDF corner tool, seam locker, and a shear/brake. A complete spiral duct factory needs: a spiral tubeformer (PD1600), gorelocker elbow machine, round flange production equipment, and a longitudinal seam welder (for stainless). A combined factory producing both needs 300–500m² of space and 8–12 workers. Preda provides complete factory layout planning and equipment configuration — contact us for a free consultation.
Factory Layout and Space Planning
Space Requirements by Factory Type
| Factory Type | Minimum Space | Recommended Space | Workers |
|---|---|---|---|
| Rectangular only (Line 3) | 150m² | 250m² | 5–7 |
| Rectangular only (Line 5) | 200m² | 350m² | 4–6 |
| Spiral only | 100m² | 200m² | 3–5 |
| Combined (rectangular + spiral) | 300m² | 500m² | 8–12 |
| Complete (with fire dampers) | 500m² | 800m² | 12–18 |
Key Layout Principles
- Linear material flow: Raw material storage → cutting → forming → assembly → finishing → finished product storage. Minimize backtracking and cross-traffic
- Separate production zones: Rectangular duct zone, spiral duct zone, fitting/accessory zone. Each zone has its own equipment and workflow
- Adequate material storage: Coil storage (for auto lines), sheet storage (for manual operations), and finished product staging area
- Loading/unloading access: Dock doors or open bays for material delivery and product shipping
- Power and compressed air: 380V/3-phase power for heavy machinery, compressed air lines for pneumatic tools
Essential Equipment List by Production Type
Rectangular Duct Factory (Line 3 — Mid-Volume)
| Equipment | Model | Purpose |
|---|---|---|
| Auto Duct Line 3 | Line 3 | Decoil, level, notch, shear, fold — complete rectangular duct body |
| Pittsburgh Lockformer | SA15HB | Form Pittsburgh lock profile on duct seams |
| TDF Flange Former | T12 or T16 | Form TDF flange on duct ends |
| TDF Corner Tool | Hydraulic Matics TDF-12 | Form TDF corners |
| Seam Locker | Portable Electric or CNC Hydraulic | Lock Pittsburgh seams |
| Press Brake | CNC Press Brake | Bend fittings, transitions, end caps |
Spiral Duct Factory
| Equipment | Model | Purpose |
|---|---|---|
| Spiral Tubeformer | PD1600 | Form spiral duct 80–1600mm diameter |
| Gorelocker Elbow Machine | Hydraulic Elbow Machine | Cut gores for spiral duct elbows |
| Round Flange Equipment | Angle Iron Bender + Punch or Forming Line | Produce round flanges for duct connections |
| Longitudinal Seam Welder | Seam Welder | Weld stainless steel round duct seams (if needed) |
| Plasma Cutter (optional) | CNC Plasma | Cut complex fittings, reducers, end caps |
Optimized Production Workflow
Rectangular Duct Production Flow
- Material loading: Load galvanized coil onto auto duct line decoiler
- Auto line processing: Line automatically levels, beads, notches, shears, and folds duct body
- Flange forming: Move duct to TDF flange former, form flanges on both ends
- Corner forming: Use TDF corner matics to form all four corners
- Seam locking: Assemble duct and lock Pittsburgh seam with seam locker
- Inspection and stacking: Quality check, label, and stack for shipping
Spiral Duct Production Flow
- Material loading: Load galvanized coil onto spiral tubeformer
- Spiral forming: Tubeformer continuously forms spiral duct to required diameter
- Cut to length: Plasma or shear cuts duct to required lengths
- Elbow production: Gorelocker cuts gores, assemble into elbows
- Flange production: Angle iron bender produces flanges, punch adds holes
- Assembly and inspection: Attach flanges, quality check, label, stack
Investment and ROI
Typical Investment Ranges
| Factory Type | Equipment Investment | Monthly Output | Typical ROI |
|---|---|---|---|
| Rectangular (Line 3) | $40,000–$70,000 | 3,000–5,000m² | 12–18 months |
| Rectangular (Line 5) | $70,000–$120,000 | 6,000–10,000m² | 10–15 months |
| Spiral only | $30,000–$60,000 | 2,000–4,000m | 12–18 months |
| Combined factory | $100,000–$180,000 | 8,000–15,000m² + 3,000–6,000m spiral | 12–24 months |
ROI Factors
Actual ROI depends on: local labor costs (higher labor = faster ROI for automated lines), material costs, selling prices in your market, utilization rate (how many shifts you run), and overhead costs. Preda can provide a detailed ROI calculation based on your specific market conditions — just ask.
Preda Care: We Help You Build Your Factory
Setting up a duct factory is more than buying machines — it's about building a profitable business. Preda Care goes beyond after-sales support to help you succeed:
- Free factory layout planning: Our engineers design your factory layout based on your space and production goals
- Equipment configuration: We recommend the right machine combination for your target market and volume
- On-site installation: Our technicians install and commission all equipment at your factory
- Operator training: 5–10 days of hands-on training for your operators and maintenance staff
- Lifetime technical support: Years after installation, we're still here — remote PLC support, video troubleshooting, phone consultation
- Free spare parts: Wear parts (blades, rollers, dies) ship free by express when needed
- Global agent network: Local service and support in 40+ countries
- Business guidance: We share best practices from 500+ successful duct factories worldwide
Ready to Build or Expand Your Duct Factory?
Contact us for a free factory planning consultation — we'll assess your space, market, and goals, and provide a complete equipment configuration with layout plan and ROI calculation.
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