What Is a Fire-Rated Duct? A Safety Solution for HVAC Systems
In the design of ventilation and air conditioning (HVAC) systems, fire safety (PCCC) is a critical factor that cannot be overlooked – especially in high-rise buildings, shopping centers, and industrial facilities. Among these, fire-rated ducts play an essential role in preventing the spread of flames and smoke through the duct system during a fire.
So, what exactly is a fire-rated duct, what is it made of, and how does it work? Let’s explore in detail with Eusteel below.
1. What Is a Fire-Rated Duct?
A fire-rated duct is a type of air duct specially designed to withstand high temperatures for extended periods, helping to prevent the spread of fire and smoke through the ventilation system during a fire incident.
It is typically installed in:
- Areas requiring high fire safety standards (corridors, basements, technical rooms, etc.)
- Floor and wall penetration locations between levels
- Corridor smoke exhaust systems and basement smoke extraction systems
2. Structure and Materials of Fire-Rated Ducts
Depending on design requirements, fire-rated ducts can vary, but generally include:
- Galvanized steel or stainless steel: Forms the structural body of the duct
- External fire-resistant layer: Typically ceramic fiber, mineral wool, or special coatings capable of withstanding temperatures from 250°C to over 1000°C
- Outer covering: Steel mesh or heat-resistant fabric to secure insulation and improve appearance
3. Main Functions of Fire-Rated Ducts
- Prevent the spread of flames through duct systems during a fire
- Block toxic smoke from spreading to other areas
- Extend evacuation time and support rescue operations
- Comply with fire safety standards set by construction and fire authorities
4. Types of Fire-Rated Ducts
🔹 By fire resistance duration:
- 60-minute fire-rated duct
- 90-minute fire-rated duct
- 120-minute fire-rated duct
(Selected based on project classification and installation location)
🔹 By duct shape:
- Rectangular duct
- Circular duct
- Flexible fire-rated duct (with specialized insulation layers)
5. Important Technical Standards
When selecting and installing fire-rated ducts, the following standards must be met:
- TCVN 5687:2010 – Ventilation and Air Conditioning Design Code
- QCVN 06:2022/BXD – National Technical Regulation on Fire Safety
- Fire resistance certification issued by authorities approved by the Ministry of Public Security
6. Eusteel Fire-Rated Ducts – Safety for Every Project
At Eusteel, we provide fire-rated ducts that meet certified standards, ensuring quality in both installation and operation. Our products come in a wide range of sizes, types, and fire resistance levels, making them suitable for all kinds of projects, including high-rise buildings, hospitals, factories, and shopping centers.
