Wuxi Weishan Environmental Protection Technology Co., Ltd. is a high-tech manufacturer of environmental ventilation systems, specializing in color steel composite ducts and subway-grade composite duct systems from its intelligent production base in Huishan District, Wuxi, China.Wuxi Weishan

 

A color steel composite duct is a prefabricated ventilation duct built from multi-layer composite panels, with a color steel plate outer layer combined with insulation, fire-resistant and sound-absorbing core materials. Compared with traditional metal ducts, it offers better thermal insulation, fire performance, installation efficiency and overall energy economy, making it a mainstream choice for modern building ventilation and subway smoke-control systems. This guide explains its structure, working principle, benefits and how to select the right product.

 

 

A color steel composite duct is manufactured from factory-made composite boards in which several functional materials are bonded into a single lightweight panel. The duct is then cut, folded and assembled into rectangular sections with integrated flanges, ready for fast on-site installation.

 

 

- Inner layer — non-combustible insulating material (such as glass wool board or similar) providing thermal insulation and noise reduction.

- Core / intermediate layer — insulating and fire-resistant materials (e.g., rock wool, glass wool or magnesium oxide core) that reduce heat transfer and block flame spread.

- Outer layer — color steel plate or other flame-retardant facing, offering corrosion resistance, wear resistance and a clean, aesthetic surface.Wuxi Weishan

 

 

 

 

1. Thermal insulation — the insulating core minimizes heat gain or loss, keeping air temperature stable and reducing HVAC energy consumption.

2. Fire resistance — non-combustible core materials block flame and high temperature, providing fire-safe duct routing through buildings.

3. Sound absorption — the porous inner/core layer absorbs fan and airflow noise, improving acoustic comfort.

4. Air tightness — factory-formed flanged joints and continuous panels minimize air leakage.

5. Moisture resistance — sealed composite surfaces prevent condensation and moisture damage.

 

 

 

- Excellent thermal insulation — integrated insulation eliminates the need for separate wrapping.

- Lightweight construction — easier handling and faster installation than heavy metal ducts.

- Fire-resistant and safe — suitable for fire-protection and smoke-control applications.

- Good sound absorption — quieter ventilation systems.

- Corrosion and moisture resistant — durable in humid environments.

- Factory prefabrication — high dimensional accuracy, less on-site labor and faster project delivery.

- Energy efficient — reduced heat loss lowers long-term operating cost.

 

Wuxi Weishan's special composite duct systems are FM-certified and support explosion-proof, acid-alkali resistant and soundproof configurations for demanding applications.Wuxi Weishan

 

 

 

- Subway and tunnel ventilation — composite smoke-control duct systems used in projects such as Nanjing Metro Line 6.Wuxi Weishan

- Commercial buildings — centralized HVAC and ventilation ducts.

- Industrial plants — workshop ventilation, exhaust and dust control.

- Public facilities — shopping centers, hospitals, schools and clean environments.

- Kitchen exhaust and smoke control — fire-safe duct routing.

 

 

 

1. Confirm fire rating — verify the core material and system meet your project's fire-protection requirements.

2. Check insulation performance — select core thickness and material based on temperature and energy targets.

3. Verify airtightness — ask for leakage test data and joint quality.

4. Assess engineering capability — a supplier that provides design, production and installation reduces project risk.

5. Review certifications — FM, ISO and national practical technology certifications indicate verified quality.

 

 

 

Wuxi Weishan Environmental Protection Technology Co., Ltd. integrates R&D, intelligent manufacturing, engineering implementation and operation & maintenance, with more than 2,000 verified global projects and strategic supply relationships with major construction groups in 16 countries and regions.Wuxi Weishan

 

Contact Wuxi Weishan for a free composite duct consultation and quotation for your ventilation project.