Why Calcium Silicate Board Is Widely Used for Fire Rated HVAC Duct Systems
Date Published
Why Calcium Silicate Board Is Widely Used for HVAC Fire Rated Duct Systems
Modern commercial and industrial buildings require HVAC duct systems with high fire resistance, excellent durability, and stable long-term performance.
One of the most commonly used solutions is the combination of galvanized steel air ducts and external Calcium Silicate Board protection.
This system is widely applied in:
Commercial buildings
Shopping malls
Underground projects
Industrial factories
Power plants
Smoke exhaust systems
Fire protection ventilation systems
Typical Fire Rated Duct Structure
Internal Duct Layer
The internal duct is usually manufactured from:
0.75 mm – 1.2 mm galvanized steel sheet
Excellent sealing performance
Strong mechanical strength
Stable airflow performance
For many industrial projects, 1.0 mm galvanized steel sheet is commonly used.
External Fire Protection Layer
The outer protection layer uses high-density Calcium Silicate Board.
Typical specification:
Thickness: 9 mm or 12 mm
Density: 950 kg/m³
Excellent fire resistance
High temperature stability
Low thermal conductivity
This structure is commonly used in 2-hour fire-rated duct applications depending on installation design and local fire standards.
Advantages of Calcium Silicate Board
Excellent Fireproof Performance
Calcium silicate board provides stable protection under high temperatures and is widely used in passive fire protection systems.
High Mechanical Strength
The board maintains structural stability during fire exposure.
Moisture Resistance
Suitable for long-term HVAC environments.
Easy Processing
The board can be cut, grooved, and CNC machined according to duct dimensions.
Smooth Surface
Suitable for industrial installation and export projects.
Standard Board Sizes
We can supply:
1220 × 2440 × 9 mm
1220 × 2440 × 12 mm
Custom cutting services are available.
CNC Machining and Custom Fabrication
Our factory provides:
CNC cutting
Groove processing
Custom fabrication
Industrial export packing
Large volume production
We manufacture according to customer technical drawings and project requirements.
Typical Applications
Smoke Exhaust Duct Systems
Used in emergency smoke extraction systems.
HVAC Ventilation
Applied in commercial ventilation systems.
Industrial Air Duct Systems
Suitable for high-temperature industrial projects.
Underground Facilities
Widely used in subway and tunnel ventilation systems.
Why Choose Our Factory
Stable industrial quality
Precision thickness tolerance
High density fireproof board
Professional export packing
Large production capacity
Technical support for HVAC projects
We support OEM production and custom processing for international projects.
Contact Us
If you are looking for professional Calcium Silicate Board for fire-rated HVAC duct systems, feel free to contact us for technical support and quotations.
Excerpt
Professional calcium silicate board solution for 2-hour fire rated HVAC duct systems. High density fireproof insulation board for industrial and commercial ventilation projects.