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Air outlets · 14/08/2025

COLOUR DURABILITY WARRANTY FOR THE POWDER COATING

The air-conditioning air outlet (grille) is a terminal product of the HVAC and ventilation system; it represents the aesthetics and architecture of this system in the elegant interior spaces of a building. It must therefore always be clean, attractive, refined and aesthetically durable.

English version machine-translated from the Vietnamese original — under review.

THE IMPORTANCE OF POWDER COATING COLOUR DURABILITY FOR AIR-CONDITIONING AIR OUTLETS

The air-conditioning air outlet (grille) is a terminal product of the HVAC and ventilation system; it represents the aesthetics and architecture of this system in the elegant interior spaces of a building. It must therefore always be clean, attractive, refined and aesthetically durable – especially in terms of powder coating quality. The powder coating line (the necessary condition) is the decisive factor, alongside the quality of the powder (the sufficient condition). Air outlets that deteriorate over time are very difficult to replace, or very costly to replace. Choose correctly so that your beloved home does not deteriorate quickly because of something so small yet so important! #starduct #AAMA2604

STARDUCT WARRANTY POLICY

1. Purpose and scope

  • Purpose: To give customers confidence in the quality and colour durability of the powder coating on Starduct air-conditioning air outlets, with a 10-year colour durability warranty commitment in accordance with international standards.
  • Period: 10 years, counted from the delivery date.
  • Scope: All new Starduct air-conditioning air outlets (grilles) that are manufactured, powder coated and installed in accordance with the manufacturer's technical instructions.

2. Standards and acceptable colour fading limits

2.1 Colour testing standards

  • Measurement method: A spectrophotometer using the CIE Lab* colour space.

  • Reference standards:

    • ASTM D2244 – Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates.
    • ISO 7724 – Paints and varnishes — Colorimetry.

  • Test conditions:

    • A 100% new sample is used as the comparison reference.
    • Measure at ≥ 5 different locations on the product surface and average the results.

2.2 Maximum permissible colour fading

  • ΔE* ≤ 5,0 after 10 years of use under standard conditions (temperate or non-severe tropical climate, no exposure to corrosive chemicals).
  • No serious chalking, peeling, pitting or colour blotching.

3. Warranty conditions

The warranty applies when all of the following conditions are met:

  1. The product is manufactured by Starduct with its original powder coating, and has not been recoated or had its surface altered.

  2. It has been installed, operated and maintained in accordance with Starduct's technical instructions.

  3. It is used in an environment that does not exceed:

    • Continuous temperature ≤ 50°C.
    • Humidity ≤ 90% RH (non-condensing).
    • No direct contact with corrosive chemicals, strong solvents, high concentrations of sea-salt vapour, or acid fumes.

  4. There are records proving the installation date and periodic maintenance.

4. Exclusions from warranty

The warranty does not apply in the following cases:

  1. Damage due to incorrect installation or strong mechanical impact (knocks, cutting, drilling…).
  2. Use in unsuitable harsh environments (chemical plants, coastal areas < 2 km, salt-spray areas without additional protective coating).
  3. Direct or frequent contact with chemicals, solvents, acids or alkalis.
  4. Damage due to natural disasters, fire, flooding or force majeure.
  5. The customer has, on their own initiative, recoated or modified the product or altered its structure.
  6. Periodic maintenance has not been carried out as recommended by the manufacturer.

5. Maintenance, servicing and proper use requirements

  • Clean the surface 1–2 times/year with a soft cloth, neutral soap solution and clean water; avoid hard brushes or harsh chemicals.
  • Inspect the surface annually to detect scratches or damage early.
  • Do not allow hard objects to rub frequently against the coated surface.
  • If the product is near a source of salt vapour or high pollution, increase cleaning frequency to 3–4 times/year.

6. Warranty method

  • Form: 100% replacement of the defective product (no repair, no recoating).
  • Scope: Does not include the cost of removal, transport and labour for reinstallation.
  • Processing time: Within 30 working days from confirmation that the defect is covered by the warranty.

7. Warranty claim procedure

  1. The customer notifies Starduct in writing/by email with photos, videos and a description of the defect.
  2. Starduct sends a technician to inspect on site or requests that samples be sent to the factory.
  3. The colour deviation ΔE* and related technical parameters are tested.
  4. A conclusion is issued and replacement is carried out if the conditions are met.

8. Harsh environments — Jotun systems

  • C3–C5 environments (ISO 12944-2), outdoor, coastal and industrial sites: choose Jotun Facade (15 years) or Jotun Super Durable (25 years), warranted directly by Jotun under Jotun Powder Coatings' terms — not part of Starduct's 10-year warranty.

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