Duct systems are the core carriers of air circulation. Made of metal, non - metal thin sheets or composite materials, they are widely used in ventilation, air - conditioning and smoke exhaust projects of industrial facilities, commercial buildings and civil spaces. Their design needs to balance efficiency, cost and scenario adaptability. Especially in the field of kitchen appliances, the choice between ducted and ductless range hoods directly affects the ventilation effect.

 

I. Core Functions and Advantages of Duct Systems

1. High - efficiency Sealing: Circular ducts with a spiral structure can significantly reduce the number of pipe connections, thus reducing the risk of leakage. The precise seaming process ensures that the joints are flat and tight, further enhancing the sealing performance and extending the service life.

2. Lightweight and Corrosion Resistance: Composite material ducts such as fiberglass are lightweight, high - strength and resistant to chemical corrosion, making them suitable for places with strict hygiene requirements such as food processing and pharmaceutical industries. Inorganic fiberglass ducts also have functions of fire prevention, flame retardancy, noise reduction and vibration damping.

3. Installation Economy: The standardized accessory production of circular ducts has a high degree of automation. The installation time is only 1/3 of that of rectangular ducts, significantly reducing construction costs. In addition, circular cross - sections have lower air resistance, which can reduce energy consumption.

4. Diverse Material Choices: In addition to traditional galvanized steel sheets, materials such as aluminum sheets, stainless steel and phenolic composite panels can be adapted to different scenarios. For example, stainless - steel ducts are suitable for high - temperature and high - humidity environments, while composite ducts perform excellently in heat insulation.

 

II. Application Scenarios and Adaptation Schemes

Duct systems cover multiple fields, including:

- Industrial Scenarios: Mechanical manufacturing workshops need to remove metal dust, electronic factories require dust - free ventilation, and aerospace facilities rely on high - precision temperature and humidity control.

- Commercial and Public Spaces: Shopping malls and hotels achieve centralized air - conditioning air exchange through ducts; stadiums and theaters need to balance air circulation and noise control in densely populated areas.

- Residential Buildings: Small villas and apartments often use lightweight composite ducts, taking into account both installation convenience and space utilization.

 

III. Selection Strategies for Kitchen Ventilation Equipment

In the field of kitchen appliances, the differences between ducted and ductless range hoods directly affect the usage effect:

- Ducted Range Hoods: These range hoods directly exhaust oil fumes outdoors through an external duct, which are suitable for families or commercial kitchens with high - frequency cooking. Their advantage lies in the efficient removal of oil fume particles and odors, but they require reserving an external wall exhaust vent and planning the duct route.

- Ductless Range Hoods: These range hoods use an internal filtration and circulation system without the need for an external duct, and are suitable for scenarios where the building structure cannot be modified (such as apartment buildings). The filter needs to be replaced regularly to maintain the purification efficiency, resulting in relatively high long - term usage costs.

 

IV. Key Factors in Selecting Duct Systems

1. Space Limitations: In narrow areas, circular ducts are preferred to reduce the occupied area; in large - span spaces, rectangular ducts can be used to optimize the layout.

2. Budget and Maintenance Costs: Metal ducts have a high initial investment but a long service life, while composite material ducts are easy to install but require regular inspection of their sealing performance.

3. Environmental Requirements: Rust - resistant materials should be used in high - humidity places, and oil - resistant ducts that are easy to clean should be selected for catering kitchens.

 

By comprehensively evaluating the usage scenarios, budget and technical requirements, users can accurately select the appropriate duct systems and ventilation equipment to achieve an efficient and economical air management solution.