GB Duct | China's Largest HVAC Duct Board Factory
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Available in standard and custom sizes, compliant with CE, ASTM E84 and FM 4880 standards, trusted by 500+ HVAC contractors worldwide.
✅ Thermal Conductivity ≤0.022 W/(m·K)
✅ Class A Fire Rated
✅ 50+ Years Service Life
✅ Fast On-Site Fabrication
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Industry-Leading Thermal Performance
• Closed-cell structure
• Thermal conductivity down to 0.022 W/(m·K)
• 30% higher efficiency than rock wool
• 15% better performance than EPS panels
• Greatly cuts HVAC energy costs
Superior Fire Safety
• Flame-retardant PIR foam material
• ASTM E84 Class A fire rated
• EN 13501-1 B-s1,d0 certified
• Optional FM approval available
• Ideal for high-risk commercial & industrial projects
50% Faster Installation
• Integrated pre-insulated design
• No extra insulation or cladding needed
• Easy on-site cutting & assembly
• Simple tools only required
• Up to 50% labor cost saved
Long-Lasting Durability
• Closed-cell foam resists moisture & mold
• Aluminum foil facing anti-corrosion
• Stable performance without degradation
• Over 50 years long service life
Alibaba Group Global Headquarters- ByteDance Shanghai Headquarters
- Nanjing University
- Shanghai Grand Theatre
- Embassy of the United Arab Emirates in Beijing
- The Palace Museum
Why Choose Us
China's Largest HVAC Duct Board Factory | GB Duct, Established 1984
Rich Industry Experience
With over 40 years of experience in the HVAC industry, we have completed more than 10,000 projects worldwide.
Strong Production Capacity
We run 10 advanced automated production lines with a daily capacity of 30,000 sq.m, ensuring reliable quality and on-time delivery for large orders.
Professional Technical Team
Our experienced engineering team provides one-stop customized solutions and full-process professional technical support for all your project demands.
Competitive Factory Price
As a direct manufacturer without middlemen markup, we offer genuine factory direct prices, helping you save up to 20% cost compared with trading companies.
Comprehensive After-sales Service
We provide complete after-sales support, including on-site installation guidance, professional technical training and efficient problem solving anytime.
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