Buyers considering double wall spiral ducting typically pay based on diameter, length, gauge, and insulation; most projects fall in broad ranges. This article lists the double wall spiral duct price for common sizes, materials, and installation scenarios so readers can budget and compare quotes.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Per Linear Foot (4″–8″ dia.) | $6 | $10 | $18 | Assumptions: Galvanized, 26–24 ga, light insulation. |
| Per Linear Foot (10″–24″ dia.) | $9 | $16 | $30 | Assumptions: Heavier gauge, thicker insulation. |
| Installed 100-ft Run | $1,200 | $2,500 | $4,500 | Assumptions: Includes materials, labor, connectors, standard access. |
| Custom Fabrication / High Grade | $3,000 | $6,500 | $12,000 | Assumptions: Large diameter, stainless, complex transitions. |
Content Navigation
- Typical Price for Double Wall Spiral Duct Systems
- Cost Breakdown: Materials, Labor, Equipment, Delivery
- How Diameter, Gauge, and Insulation Thickness Change Price
- Practical Ways To Lower Double Wall Spiral Duct Price
- Regional Price Differences Across U.S. Markets
- Installation Time, Crew Size, and How They Affect Quotes
- Real-World Quote Examples For Common Jobs
Typical Price for Double Wall Spiral Duct Systems
Most residential and light commercial installs using double wall spiral duct range from $1,200 to $4,500 for typical runs; per-linear-foot pricing commonly sits between $6 and $30 depending on diameter and gauge. Average installed price for a standard 100-foot run is about $2,500 including labor and basic fittings.
Assumptions: Midwest labor rates, standard galvanized steel, normal attic or ceiling access.
Cost Breakdown: Materials, Labor, Equipment, Delivery
Breaking the quote into parts helps spot savings and compare bids. Material and labor are the biggest line items; expect roughly 50–65% of total cost in materials and 25–40% in labor on average.
| Materials | Labor | Equipment | Delivery/Disposal |
|---|---|---|---|
| $6-$20 per lf (galvanized 26–18 ga, insulation +$1–$6/lf) | $75-$125 per hour; typical crew 2-3 | $50-$250 per day (lifts, scaffolding) | $50-$400 depending on distance and waste |
Assumptions: Each lf = one linear foot of straight duct, excludes fittings and collars.
How Diameter, Gauge, and Insulation Thickness Change Price
Diameter, metal gauge, and insulation thickness are primary variables when pricing double wall spiral duct. Small changes in gauge (e.g., 26 ga to 20 ga) can raise material cost by 20–60% for the same diameter.
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Numeric thresholds to watch: under 8″ diameter typically $6-$12 per lf; 10″–16″ typically $12-$22 per lf; 18″–36″ often $20-$40+ per lf. Insulation: +$1–$4 per lf for 1″ to 2″ bonded insulation; specialty acoustic liners add $3–$8 per lf.
Practical Ways To Lower Double Wall Spiral Duct Price
Buyers can reduce cost by standardizing sizes, minimizing transitions and fittings, scheduling work off-peak, and providing clear access. Choosing a slightly lighter gauge where code and application permit can save 10–30% on materials.
- Consolidate runs to reduce total linear footage.
- Pre-plan routes to avoid extra penetrations or scaffolding.
- Buy fittings with the duct supplier as a package to trim markup.
- Accept commercial-standard finishes instead of custom stainless when applicable.
Regional Price Differences Across U.S. Markets
Labor and material availability drive regional deltas: coastal metro areas often run 10–30% higher than Midwest pricing. Expect contractor rates in large urban markets (NYC, SF, LA) to be 20–35% above the national average.
| Region | Typical Installed Rate | Delta vs. Midwest |
|---|---|---|
| Midwest | $1,200-$3,000 per 100-ft run | Baseline |
| South | $1,000-$2,800 per 100-ft run | -5% to -10% |
| West Coast | $1,800-$4,500 per 100-ft run | +20% to +35% |
| Northeast | $1,500-$4,000 per 100-ft run | +10% to +30% |
Installation Time, Crew Size, and How They Affect Quotes
Typical installs take 6–20 hours for a small job and 1–3 days for larger runs; crew size usually 2–4 installers. Labor time increases significantly when access is tight—add 25–75% more hours for confined attic or multi-story work.
Example labor math: 12 hours × $95/hour for a two-person crew equates to $2,280 labor.
Real-World Quote Examples For Common Jobs
Providing concrete examples helps validate budgets. Three sample quotes below reflect realistic material grades, run lengths, fittings, and labor.
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Tips for Getting the Best HVAC Prices
- Prioritize Quality Over Cost
The most critical factor in any HVAC project is the quality of the installation. Don’t compromise on contractor expertise just to save money. - Check for Rebates
Always research current rebates and incentives — they can significantly reduce your overall cost. - Compare Multiple Quotes
Request at least three estimates before making your choice. You can click here to get three free quotes from local professionals. These quotes include available rebates and tax credits and automatically exclude unqualified contractors. - Negotiate Smartly
Once you've chosen a contractor, use the proven strategies from our guide — How Homeowners Can Negotiate with HVAC Dealers — to get the best possible final price.
| Job | Specs | Labor Hours | Total Price |
|---|---|---|---|
| Small Kitchen Run | 20 lf, 8″ dia, 26 ga, basic elbow | 6 | $240-$480 materials, $450-$900 labor, Total $700-$1,400 |
| Whole-House Main Trunk | 120 lf, 16″ dia, 22 ga, 3 branches | 18 | $1,600-$3,200 materials, $1,350-$2,700 labor, Total $3,000-$5,900 |
| Commercial Large Diameter | 250 lf, 24″–36″ dia, 18 ga, insulated | 40 | $6,000-$12,000 materials, $3,000-$6,000 labor, Total $9,000-$18,000 |