EI45 FIREPROOF AIR DUCT – ENSURING ABSOLUTE SAFETY IN HVAC SYSTEM
In the context of increasingly strict requirements on fire prevention and fighting (PCCC), especially in large-scale civil and industrial works such as commercial centers, hospitals, apartments, factories, ventilation systems play an important role in controlling smoke and hot gas when an incident occurs. In particular, EI45 fire-resistant duct is a mandatory and optimal solution to help maintain the ability to operate the HVAC system in emergency conditions, ensuring absolute safety for people and property.
In this article, let's learn with SAO VIET AIR DUCT in detail about the structure, features, benefits and practical applications of EI45 fireproof air duct in modern mechanical and electrical systems of construction works.
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1. What is EI45 Fireproof Duct?
EI45 fireproof air duct is a type of air duct specially designed to be fireproof and heat resistant for 45 minutes according to EI45 standard - that is, meeting 3 factors:
• E (Integrity) – integrity
• I (Insulation) – insulation capacity
• 45 (Minutes) – minimum fire resistance time 45 minutes
This means that in the event of a fire, the duct will not be deformed, will not transmit fire, and will not transmit heat to the outside for 45 minutes - enough time to evacuate people, prevent the fire from spreading, and carry out rescue work.
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2. Technical Standards and Fire Safety Certification for EI45 Air Duct
To be recognized as EI45 fire-resistant ductwork, the product must undergo rigorous testing at a designated testing center. In Vietnam, the standards are usually based on:
• QCVN 06:2022/BXD – National technical regulation on fire safety for houses and buildings
• TCVN 9344-1:2012 – Design standards for ventilation and air conditioning systems
• European standard EN 1366-1:2014 – Fire resistance test for ventilation systems
EI45 air duct is required to have a fire prevention and fighting inspection certificate from the Fire Prevention and Fighting Police Department or a licensed unit.
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3. Structure of EI45 Fireproof Duct
3.1. Inner core layer
• Usually made from galvanized iron (GI) or stainless steel with a thickness of 0.8 - 1.2mm.
• Sealed welding ensures no gas or smoke leakage under high temperature conditions.
3.2. Fireproof material layer
• Stick or wrap the outer core layer with Rockwool mineral wool, Ceramic wool, or specialized fireproof materials (Promat, calcium silicate...).
• Common thickness is from 25 - 50mm, depending on the technical requirements of the project.
3.3. Outermost protective layer
• Is a cover made of smooth corrugated iron or galvanized steel mesh that helps fix fireproof and scratch-resistant materials and increase aesthetics.
• Can be painted fireproof gray or black to distinguish it from normal air ducts.
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4. Advantages of EI45 Fireproof Duct
✅ Absolute Safety Guaranteed
Heat resistance and fire prevention help protect ventilation systems, minimizing damage in the event of a fire or explosion.
✅ Maintain System Operation During Emergency
Allows the smoke extraction and fresh air supply system to continue operating for 45 minutes in the event of a fire – which is extremely important to protect human lives.
✅ Comply with Fire Prevention and Fighting Standards
It is a mandatory requirement in fire safety acceptance projects, especially in grade I, special grade, and public works.
✅ High Durability – Long Lifespan
Withstand harsh environmental conditions, high humidity, chemical environments (if using stainless steel material).
✅ Flexible Installation - Easy Construction
Can be bent, branched, combined with fireproof accessories such as air valves, elbows, tees, EI air vents.
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5. Applications of EI45 Ducts in HVAC Systems
Basement smoke exhaust system
High-rise buildings are required to have a smoke extraction system in the basement. EI45 pipes help to direct smoke from lower floors to the outside, preventing smoke from spreading to the escape area.
Corridor smoke exhaust system
Keep corridors clear during a fire, keeping escape routes safe for residents and rescuers.
Fresh air supply system for stairwells
Helps create positive pressure in the fire escape shaft to prevent smoke from entering – a mandatory requirement in buildings with 2 or more basements.
Central air conditioning system
In large shopping malls and hotels, EI45 ductwork helps the HVAC system to operate safely and efficiently in the event of a fire.
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6. Comparison of EI45 Fireproof Duct and Normal Duct
Criteria for conventional air ducts EI45 air ducts
Fire resistance None Fire resistance ≥ 45 minutes
Fire safety Not met Acceptance standards
Materials: Plain corrugated iron + fireproof layer
Applications: Normal air conditioning and ventilation, smoke exhaust and fire protection air supply systems
Lower Cost Higher (commensurate with quality)
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7. Construction Process of Fireproof Duct EI45
1. System survey and design: Based on technical drawings and fire protection requirements to calculate air flow and pipe size.
2. Production of core duct: Processed with galvanized or stainless steel sheet, welded tightly, cut and assembled according to specifications.
3. Fireproof wrapping: Stick or wrap EI45 standard fireproof material around the pipe.
4. Reinforced outer shell: Covered with smooth corrugated iron or steel mesh, fireproof paint.
5. Installation at the construction site: According to the design, hang the bracket, seal the joints with fireproof glue or silicone.
6. System inspection: Inspected by the Fire Prevention and Fighting Unit and issued with a certificate of acceptance.
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8. Sao Viet Air Duct - Prestigious EI45 Fireproof Air Duct Construction Unit in Hai Phongg
With many years of experience in manufacturing and installing duct systems, SAO VIET AIR DUCT MANUFACTURING AND TRADING COMPANY LIMITED is proud to be a pioneer in providing EI45 fireproof ducts that meet quality standards, serving hundreds of large and small projects in Hai Phong and the Northern region.
Reasons to choose Sao Viet Air Duct:
• ✅ Product is certified for fire protection EI45
• ✅ Precise processing, high aesthetics
• ✅ Team of skilled engineers and workers
• ✅ Free technical solution consultation
• ✅ Fast construction - on schedule
• ✅ Long-term warranty - Dedicated after-sales service
Address: 267 Le Thanh Tong, May Chai, Ngo Quyen, Hai Phong
Hotline: Mrs. Hang 0985 239 838 | Mrs. Giang 0934 559 168 | Customer Service 0822 555 659
Website: www.dieuhoasaoviet.vn
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9. Conclusion
EI45 fire-resistant duct is an indispensable component in modern HVAC systems, especially in projects with high fire safety requirements. With the ability to resist fire for 45 minutes, the product not only ensures compliance with fire prevention regulations but also contributes to protecting human life and property.
If you are looking for a high quality fireproof duct solution, please contact SAO VIET AIR DUCT immediately for consultation, design and detailed quotation - we are committed to accompanying your project from the drawing stage to actual completion.
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