2 Hour Fire Rated HVAC Duct System Using Calcium Silicate Board
Modern HVAC and smoke exhaust systems require excellent fire resistance, thermal insulation, and long-term durability. One of the most widely used solutions in industrial and commercial buildings is the combination of galvanized steel air ducts with external Calcium Silicate Board protection.
This fire-rated duct system is commonly used in:
- Commercial buildings
- Industrial plants
- Power stations
- Underground facilities
- Shopping malls
- High-rise buildings
- Smoke exhaust systems
- Fire protection ventilation systems
Structure of the Fire Rated Duct System
The duct system is manufactured using:
Internal Duct
- 1.0 mm galvanized steel sheet duct
- Excellent air sealing performance
- Strong mechanical strength
- Stable HVAC airflow performance
External Fire Protection Layer
- 12 mm Calcium Silicate Board
- Density: 950 kg/m³
- High temperature resistance
- Excellent fireproof performance
- Low thermal conductivity
This structure is commonly used for 2-hour fire-rated duct applications depending on duct dimensions, reinforcement design, installation method, and local fire standards.
Advantages of Calcium Silicate Board for HVAC Duct Protection
Excellent Fire Resistance
Calcium silicate board provides outstanding fireproof performance and is widely used in passive fire protection systems.
High Mechanical Strength
The board maintains stability and strength under high temperatures.
Thermal Insulation
Helps reduce heat transfer and improves fire safety performance.
Moisture Resistance
Suitable for long-term industrial HVAC applications.
Easy CNC Processing
Boards can be precisely cut and processed for different duct sizes and installation requirements.
Standard Board Size
We can supply:
- 1220 × 2440 × 9 mm
- 1220 × 2440 × 12 mm
Custom cutting and CNC machining services are available according to customer drawings.
Typical Applications
HVAC Air Duct Systems
Used in commercial and industrial ventilation systems.
Smoke Exhaust Ducts
Suitable for fire-rated smoke extraction systems.
Power Plant Ventilation
Used in high-temperature industrial environments.
Underground Facilities
Widely applied in subway and tunnel ventilation systems.
Professional Manufacturing and CNC Processing
Our factory provides:
- Precision CNC cutting
- Custom fabrication
- Industrial export packing
- Large volume production
- Technical support for HVAC insulation systems
We can manufacture according to customer technical drawings and project requirements.
Why Choose Our Calcium Silicate Board
- Stable industrial quality
- High density fireproof board
- Smooth surface finish
- Precise thickness tolerance
- Excellent machining performance
- Suitable for HVAC fire-rated duct systems
Contact Us
If you are looking for high-quality Calcium Silicate Board for fire-rated HVAC duct systems, feel free to contact us for technical support, quotations, and customized solutions.