Case Study: 8011-O Aluminum Foil for Flexible Air Ducts — Portugal HVAC Manufacturer
Customer Background
Our client is a specialised HVAC (heating, ventilation and air conditioning) duct manufacturer based in Portugal. The company produces flexible and semi-rigid air ducts for residential, commercial and industrial ventilation systems across the European market. To stay competitive, they require a reliable, consistent-quality aluminium foil that can be formed into spiral and flexible ducts without cracking, tearing or surface defects.
The Challenge
Flexible and spiral air ducts are formed by continuously wrapping and bonding thin aluminium foil around a wire or polyester core. This process demands a foil with exceptional ductility and elongation, precise and consistent thickness and width tolerances, a clean and uniform surface (white painted or mill finish), and dependable repeatable quality across large production batches. Earlier material sources caused frequent edge cracking and inconsistent widths, leading to line stoppages and higher scrap rates.
The Solution
We supplied our 8011-O aluminium foil, tailored precisely to the customer's duct-forming line:
| Parameter | Specification |
|---|---|
| Alloy | 8011 |
| Temper | O (soft, fully annealed) |
| Thickness | 0.1 mm |
| Width | 60 mm (custom slit) |
| Surface | White painted or uncoated (mill finish) — customer's choice |
| Application | Flexible air ducts / spiral duct forming |
Why 8011-O Aluminum Foil
- Perfect ductility: The soft O temper delivers outstanding elongation and formability, allowing the foil to be spiral-wound and flexible-duct formed without cracking or tearing.
- Consistent quality: Tight thickness and width tolerances keep the customer's forming line running smoothly batch after batch.
- Flexible surface options: Available in white painted or uncoated mill finish, matching different duct designs and market requirements.
- Clean surface: A uniform, defect-free surface ensures reliable adhesive bonding and a professional finish.
- Corrosion resistance: Good anti-corrosion performance for long service life in ventilation systems.
Results & Benefits
Stable, crack-free spiral and flexible duct forming with significantly reduced scrap.
- Consistent foil quality enabled higher line speed and fewer stoppages.
- Finished ducts (as shown in the customer's photo) met the required appearance and durability standards.
- Repeat orders and a long-term supply relationship were established.
Customer Feedback
The customer reported that our foil's ductility and consistency allowed their production line to run smoothly, and that the finished air ducts performed exactly as required for the European HVAC market.
About This Application
Aluminium foil for flexible air ducts is one of our core product lines. We supply consistent-quality foil to HVAC duct makers worldwide, supporting custom alloy, temper, thickness, width and surface finishes. Whether you need white painted or mill finish foil for spiral ducts, flexible ducts or insulated ducting, we can deliver a dependable, repeatable solution.
Contact us today to discuss your HVAC duct foil requirements and request a free sample.