Introduction to Hoods in Spiral Duct Systems

In ventilation systems, controlling airflow at exit points or pollutant capture areas is of high importance. The spiral duct hood serves as a vital fitting responsible for effectively collecting airflow and directing it towards the exhaust path or air purification equipment.
Using the appropriate hood reduces pressure drop, prevents the scattering of dust and suspended particles, and increases the overall efficiency of the ventilation system.

Applications of Spiral Duct Hoods

Hoods are used in various parts of the ventilation system:

• Collecting airflow from different points in the system
• Directing air to filters or specific outlets
• Preventing the scattering of dust and suspended particles
• Increasing ventilation efficiency and reducing pressure drop
• Protecting equipment and ducts from the entry of pollutants

In industrial projects, hoods play a vital role in managing pollutants and improving air quality.

Types of Spiral Duct Hoods

Hoods are divided into several categories based on their application:

Standard Hood
This type of hood collects airflow directly and directs it to the exhaust path. Its application is in general and industrial ventilation systems.

Deflector Hood
This model directs the airflow at a specific angle to ensure uniform and controlled air distribution.

Industrial Hood
Designed for collecting industrial pollutants, dust, and suspended particles in factories and sheds. It features a robust structure and often includes a mesh or filter.

Kitchen or Commercial Hood
This type of hood is designed to capture and direct air and pollutants in kitchens, restaurants, and commercial centers, and can direct grease and smoke flows towards the purification path.

Advantages of Using Standard Hoods

Using standard and high-quality hoods offers numerous benefits:

• Effective collection and direction of airflow
• Preventing the scattering of dust and suspended particles
• Reduced system pressure drop
• Protection of equipment and ducts
• Fast and easy installation
• Increased overall ventilation system efficiency

In industrial and commercial projects, using the appropriate hood reduces maintenance costs and increases the useful lifespan of the system.

Material and Composition of Spiral Duct Hoods

Hoods are usually manufactured from the following materials:

• Galvanized steel sheet (widely used and cost-effective)
• Stainless steel sheet (for industrial environments or resistance to corrosion and heat)
• Aluminum sheet (lightweight and resistant)
• Stainless steel (in special and industrial environments)

Galvanized sheet is the first choice for most projects due to its high resistance, long durability, and suitable price.

Important Considerations in Selecting and Installing Hoods

To choose the appropriate hood, attention must be paid to the following:

• Diameter and dimensions of the duct
• Type of application and installation environment (industrial, commercial, residential)
• Need for mesh, filter, or flow guidance
• Manufacturing quality and sealing
• Angle and length of the hood to reduce pressure drop

Correct selection of the hood improves system efficiency and reduces execution and energy issues.

Application of Hoods in Different Projects

Hoods are used in various types of projects:

• Residential buildings and office complexes
• Commercial and retail centers
• Industrial kitchens and restaurants
• Hospitals and medical centers
• Factories, sheds, and industrial spaces

In all these projects, a standard hood optimizes airflow and maintains environmental air quality.

Conclusion

The spiral duct hood is one of the vital fittings in HVAC systems, responsible for collecting, directing, and controlling airflow. Using standard and high-quality hoods increases system efficiency, reduces pressure drop, and prevents the scattering of pollutants. Kian Fan offers various types of spiral duct hoods with high quality and in accordance with modern standards to professionally meet the needs of different ventilation projects.