Air Extraction Ducts
Introduction
Definition and function of air extraction ducts
Air extraction ducts are ducts designed to transport stale or contaminated air from the inside of a space to the outside, ensuring air renewal and improving environmental quality. These systems are essential in residential, commercial and industrial facilities, where adequate ventilation is key to the health, comfort and safety of occupants.
The main function of extraction ducts is to eliminate odors, gases, dust, vapors and other contaminants generated indoors, thus providing a healthy environment in compliance with current regulations. In addition, they help prevent the accumulation of moisture and the proliferation of microorganisms, which can affect the structure and internal systems of buildings.
Types of ducts for air extraction
Rigid ducts
Rigid ducts are generally made of sheet metal, such as galvanized steel or aluminum, and provide a solid, durable structure for conducting air. They are mainly used in centralized ventilation systems where efficient flow control and low pressure loss are required.
This type of duct allows for easy cleaning and maintenance, in addition to offering greater resistance to corrosion when appropriate materials or protective coatings are used. However, its installation can be more complex due to its rigidity and weight, requiring supports and careful design to avoid vibrations and noise.
Flexible ducts
Flexible ducts are composed of plastic materials reinforced with metal wires or meshes that allow their deformation and adaptation to small spaces or irregular geometry. They are ideal for short connections between main systems and extraction points, facilitating installation in areas with obstacles.
Although their cost and weight are lower than rigid ducts, they present greater pressure losses due to internal roughness and curves. Furthermore, their durability and mechanical resistance are lower, so they are not recommended for long journeys or with high flow demands.