HVAC Duct Fire Protection & Ventilation Systems
Ventilation channels and air ducts are a vital part of any building’s engineering systems. In the event of a fire, they can act as a highway for the rapid spread of flames and toxic smoke throughout the entire facility. Implementing a reliable HVAC duct fire protection system helps localize the fire, increases the fire resistance rating of the structures, and provides crucial extra time for safe evacuation
Technology products
Industrial Stone Wool Slabs
Product Description
Industrial stone wool slabs are high-performance thermal insulation boards designed for heavy-duty engineering systems, including large-scale HVAC insulation networks and specialized duct fire protection systems. Available either unfaced or with various factory-applied facings—such as yellow/black glass tissue and aluminum foil—these slabs are manufactured in two distinct density options: 70 kg/m³ and 110 kg/m³. Each density is optimized with specific technical properties to provide superior structural stability, acoustic dampening, and maximum thermal efficiency for industrial air handling, fireproofing, and ventilation systems.
Product Application
The outstanding non-combustible properties of these industrial stone wool slabs make them an ideal choice for high-temperature thermal, acoustic, and reliable fire isolation within demanding HVAC duct fire protection projects.
- Installation Method: The technical slabs are mounted onto flat or structured surfaces using specialized insulation pins and retaining washers, ensuring a tight fit for continuous fire protection.
- Cladding & Framing: Once secured, they are typically covered with an outer sheet metal jacketing (cladding) or integrated into a structural framework built on the surface to withstand industrial environments.
- Fire Resistant Barriers: These high-density boards serve as excellent internal or external fire barriers, delaying heat transfer and preventing flame spread through multi-zone ductwork.
- Prefabricated Systems: These high-density boards are also perfectly suited for use inside prefabricated sandwich panels, fire-rated enclosures, and modular air distribution casings.
Product Specifications
- Material: Stone Wool (Mineral Rock Wool)
- Available Densities: 70 kg/m³ and 110 kg/m³
- Standard Dimensions: Length 1200 mm $\times$ Width 600 mm
- Available Thicknesses: 25; 40; 50; 60; 80; 100; 120 mm
- Facing Variations: Plain (unfaced), yellow glass tissue, black glass tissue, or aluminum foil faced (alu-foil).
- Reaction to Fire (Fire Class): Class A1 (Non-combustible)
- Water Vapor Diffusion Resistance ($\mu$): 1
- Packaging Material: Polyethylene film (PE Film)
- Standards & Compliance: TS EN, TS EN ISO
Thermal Conductivity (lambda) for 70 kg/m³ Density:
- at 50 °C: 0.046 W/m·K
- at 100 °C: 0.056 W/m·K
- at 150 °C: 0.070 W/m·K
- at 200 °C: 0.080 W/m·K
- at 250 °C: 0.101 W/m·K
Thermal Conductivity ($\lambda$) for 110 kg/m³ Density:
- at 50 °C: 0.047 W/m·K
- at 100 °C: 0.057 W/m·K
- at 150 °C: 0.072 W/m·K
- at 200 °C: 0.081 W/m·K
- at 250 °C: 0.103 W/m·K
Lamella Mat (Stone Wool)
Product Description
A lamella mat is a flexible, high-performance roll material designed for advanced pipe insulation, HVAC duct protection, and structural fireproofing. Made of premium stone (basalt) wool, its mineral fibers are oriented strictly perpendicular to the insulated surface. It is typically supplied with an outer facing of reinforced aluminum foil. This perpendicular fiber orientation provides exceptional tensile strength, high compressive resistance, and minimal deformation on bends, making it an ideal fire resistant mat for complex geometries.
Product Application
This versatile stone wool lamella mat serves as a specialized solution for tank insulation, industrial pipe insulation, and technical systems where flexibility, a reliable vapor barrier, high-temperature resistance, and robust fire protection are required:
- Air Ducts & HVAC Systems: High-efficiency thermal, acoustic, and HVAC duct fire protection. The reinforced foil facing acts as a premium vapor barrier to prevent condensation and moisture accumulation.
- Duct Fire Protection & Prevention: Used as a non-combustible protective wrap to increase the fire resistance rating of ventilation and smoke extraction systems, preventing flame propagation through building zones.
- Pipelines & Industrial Networks: Efficient pipe insulation for large-diameter networks, hot and cold water supply, heating systems, and high-temperature process lines.
- Equipment and Tanks: Fireproofing and thermal shielding for cylindrical surfaces, chemical tanks, and industrial vessels.
Product Specifications
Material: Stone Wool (Basalt Wool)
- Facing: Reinforced aluminum foil (serves as a vapor barrier and heat reflector)
- Fiber Orientation: Perpendicular to the surface (ensures flexibility and high tensile strength)
- Reaction to Fire (Fire Class): Non-combustible (A1) for the base wool; the facing may have an additional rating depending on the adhesive layer.
- Operating Temperature Range: Typically up to +250°C (the base wool withstands much higher temperatures, but the foil backing limits the outer surface temperature).
- Density: Typically ranges from 35 to 50 kg/m³ (lower than wired mats due to the perpendicular fiber structure). Standard grades: 35, 40, 50 kg/m³.
- Length: 2000 mm – 10000 mm (depending on thickness)
- Width: Standard 1000 mm
- Thickness: 20, 30, 40, 50, 60, 80, 100 mm
- Water Vapor Diffusion Resistance (μ): ≈1 for the base stone wool. However, the aluminum foil facing acts as a virtually absolute vapor barrier, preventing moisture penetration.
- Water Absorption: Extremely low (hydrophobic properties).
- Standards: TS EN, TS EN ISO
Thermal Conductivity (λ) for density 40 kg/m³: - at 10 °C: ≈0.037 W/m·K
- at 50 °C: ≈0.041 W/m·K
- at 100 °C: ≈0.050 W/m·K
System Purpose
The primary objective of HVAC duct fire protection is to stop the spread of fire and toxic combustion products (smoke) between different fire compartments and floors..
- Fire Localization: Preventing fire from breaking out of one room or zone and entering another via ventilation shafts.
- Safe Evacuation: Maintaining the structural integrity and insulation capacity of the ductwork for the required period, which is critical for emergency smoke extraction and safe human escape.
- Smoke Control Functionality: Keeping emergency smoke control ventilation systems operational to clear exit routes, making evacuation pathways usable.
- Structural Failure Prevention: Preventing rapid metal heating and subsequent deformation, which could cause the duct to collapse and spread the fire.
Applications
Fire resistant ductwork insulation is mandatory in all buildings where ventilation lines cross the boundaries of distinct fire zones:
- Industrial Facilities: Factories, warehouses, and manufacturing plants. It is essential to isolate ventilation passing through zones with different fire hazard classes (e.g., between a production floor and administrative offices).
- High-Rise and Residential Buildings: Insulation of transit air ducts passing through apartments or corridors that they do not directly serve. This blocks fire and smoke from jumping from lower levels to upper floors.
- Specialized HVAC Systems: Smoke extraction and air pressurization systems. These emergency ducts must have the highest fire resistance ratings (such as EI 120 or EI 180) to guarantee performance throughout the entire evacuation window
Frequently Asked Questions
What is the main goal of HVAC duct fire protection besides stopping the flames?
The ultimate goal is to prevent the spread of toxic smoke and gases between fire compartments and floors. Smoke inhalation is the leading cause of casualties during fires. Proper fireproofing ensures the integrity (E) and thermal insulation (I) of the ductwork, effectively keeping the smoke localized.