2 Hour Fire Rated Air Duct System with Calcium Silicate Board Protection
Date Published
2 Hour Fire Rated Air Duct System
Fire rated HVAC duct systems are widely used in modern commercial buildings, industrial facilities, underground projects, and smoke exhaust systems.
A common industrial solution is the use of galvanized steel air ducts combined with external Calcium Silicate Board fire protection.
This structure provides:
Excellent fire resistance
Good thermal insulation
Stable mechanical strength
Long service life
Reliable HVAC performance
Duct Construction Structure
Internal Air Duct
The internal duct is manufactured from galvanized steel sheet.
Typical specification:
Thickness: 1.0 mm
Good sealing performance
Strong structural stability
Suitable for HVAC and smoke exhaust systems
External Fireproof Protection
The external protection layer uses high-density Calcium Silicate Board.
Typical specification:
Thickness: 12 mm
Density: 950 kg/m³
High temperature resistance
Excellent fireproof performance
Stable industrial quality
This configuration is commonly used for 2-hour fire-rated duct systems depending on installation design and local standards.
Why Use Calcium Silicate Board
Excellent Fire Resistance
Calcium silicate board is widely used in passive fire protection systems.
Low Thermal Conductivity
Helps reduce heat transfer during fire exposure.
High Mechanical Strength
Maintains stability under high temperatures.
Easy Processing
Can be cut, grooved, drilled, and CNC machined.
Moisture Resistance
Suitable for industrial HVAC environments.
Standard Board Sizes
Available sizes:
1220 × 2440 × 9 mm
1220 × 2440 × 12 mm
Custom processing and CNC cutting are available according to customer drawings.
Typical Applications
HVAC Duct Systems
Commercial and industrial ventilation projects.
Smoke Exhaust Systems
Emergency smoke extraction duct protection.
Power Plants
High temperature industrial ventilation systems.
Underground Facilities
Tunnel and subway ventilation projects.
CNC Processing Service
Our factory provides:
CNC cutting
Groove processing
Custom fabrication
Export packing
Large production capacity
We support OEM production and customized industrial projects.
Advantages of Our Factory
Professional manufacturing experience
Stable product quality
High density fireproof board
Precise thickness tolerance
Industrial export packaging
Technical support for HVAC projects
Contact Us
If you are looking for professional Calcium Silicate Board for fire rated air duct systems, feel free to contact us for quotations and technical support.