Structure of Single-Layer Blade Air Grille

Overall Structure
The single-layer blade air grille is designed with an outer frame and a set of parallel, evenly spaced internal blades. The blades are made from extruded aluminum, providing good strength and corrosion resistance. The frame is typically square and sturdy, fitting tightly against the wall or ceiling during installation to create a seamless appearance with the surface.

The single-blade structure offers advantages such as lightweight design, easy installation, and simple maintenance—especially compared to more complex double-layer grilles. Depending on project requirements, users can choose between fixed blades or removable blades for easier periodic cleaning.

Adjustable Air Blades
One of the key features of the single-layer blade grille is the ability to adjust the angle of each blade individually. This allows users to easily direct airflow as desired, helping optimize cooling or ventilation performance within the space.

In addition, the adjustment mechanism is often concealed inside or placed behind the grille, keeping the external surface clean and neat. This feature is particularly useful for controlling supply or return airflow in enclosed spaces such as meeting rooms, offices, showrooms, or residential buildings.

Common Applications of Single-Layer Air Grille

Used as Return Air Grille
The most common application of the single-layer blade grille is as a return air grille in central air conditioning systems. Its simple structure and adjustable airflow direction help improve air return efficiency, sending air back to the central processing unit for cooling or filtration before being supplied again.

Compared to multi-layer grilles, the single-layer design reduces airflow resistance, allowing the return fan to operate more efficiently and save energy while maintaining proper air circulation. This type is especially suitable for quiet environments such as meeting rooms or bedrooms due to its low-noise operation.

Used for High-Volume Supply Air
Although typically used for return air, the single-layer grille can also serve as a supply air outlet in high-airflow applications, particularly in factories, workshops, or shopping centers.

The single-layer design allows faster and wider air discharge, reducing static pressure at the outlet. Combined with flexible airflow direction control, this ensures even air distribution across the space, preventing air concentration or localized hot/cold spots.

Material and Durability

Powder-Coated Extruded Aluminum
Most single-layer blade grilles today are made from extruded aluminum, a material known for being lightweight yet structurally strong. It provides excellent rust resistance and can withstand impact, high temperatures, and humid environments.

Aluminum is also highly recyclable, supporting environmentally friendly and sustainable construction. During use, it does not deform due to moisture or oxidation like some other metals, extending product lifespan with minimal maintenance.

Color and Surface Finish
The surface is typically coated with high-quality electrostatic powder paint, enhancing appearance while protecting the aluminum from dust, moisture, and mild chemicals.

Powder coating also improves aesthetics, with customizable colors to match interior design. This is why many high-end projects such as hotels, villas, and commercial centers prefer grilles with premium surface finishing.

Suitable Installation Locations

Ceiling, Wall, or Duct Installation
Depending on the ventilation system design, the single-layer blade grille can be installed on suspended ceilings, walls, or directly onto duct openings. Its square frame and slim border allow secure mounting using screws, brackets, or magnets depending on the type.

Ceiling installation is the most common, allowing natural vertical or angled airflow. Wall-mounted installation provides even air distribution across the room in concealed ventilation systems. For large industrial duct systems, direct mounting onto round or rectangular ducts saves space and simplifies installation.

Indoor or Outdoor Use
Although primarily designed for indoor use, the single-layer grille can also be installed in covered outdoor areas or locations not directly exposed to rain. Thanks to its aluminum construction and powder coating, it can withstand humidity and temperature changes without warping or deterioration.

However, for maximum durability, manufacturers generally recommend indoor installation where environmental conditions are more stable.

Conclusion
The single-layer air grille is an optimal solution for both return and supply air in modern HVAC systems. With flexible adjustable blades, durable aluminum construction, and versatile installation options, it meets both technical and aesthetic requirements. If you need an efficient, cost-effective, and easy-to-install air grille, this is a reliable choice.