Rectangular Air Ducts and Fittings from a European Manufacturer
SIA "Akvilon" manufactures and supplies complete HVAC duct systems, including rectangular ventilation ducts and other components for creating efficient utility systems.
Important: unlike standard round systems, all rectangular air ducts and fittings are manufactured exclusively to order for a specific project. This ensures maximum compliance with project documentation, optimizes logistics, and minimizes on-site waste.
Advantages of Rectangular Air Ducts
- Ergonomics and Space Saving: Rectangular ducts can be installed extremely close to walls and ceilings, making them an indispensable solution where height is limited.
- Reliability and Strength: When necessary, they are reinforced with stiffening ribs, allowing them to withstand transverse loads and operating pressure without deformation.
- Fast Installation: The use of modern flange connection systems (TDF/TDC) significantly speeds up and simplifies system assembly on site.
- Versatility: Custom manufacturing allows for the implementation of technically complex and non-standard projects with precise dimensions and configurations.
Application Areas
Rectangular galvanized air ducts are used for ventilation and air conditioning systems in various facilities, including:
- Shopping malls and entertainment centers;
- Industrial buildings and production workshops;
- Healthcare and educational institutions;
- Residential complexes and office buildings.
Technical Specifications and Manufacturing
Our production facility fully complies with key European standards, ensuring every component is reliable, safe, and energy-efficient. This commitment to quality is fundamental to our process.
Materials and Thickness
The metal thickness is selected according to EN 1507 and SMACNA standards and depends on the maximum side length of the duct and the operating pressure. Below are general recommendations for standard ventilation systems.
| Maximum Side Length (mm) |
Recommended Steel Thickness (mm) |
| up to 700 |
0.5 |
| 701 - 1200 |
0.7 |
| 1201 - 2000 |
1.0 |
| over 2000 |
1.2 or as per calculation |
Note: The specified thicknesses are general recommendations. For ducts with an aspect ratio greater than 2:1, high-pressure systems (over 1000 Pa), or special operating conditions, an individual calculation of thickness and additional reinforcement is required.
Materials:
- Galvanized Steel (DX51D+Z275): The primary material for general ventilation.
- Stainless Steel (AISI 304L, 316L): Used for facilities with high hygiene requirements or in corrosive environments.
For design-specific requirements, powder coating in any color from the RAL catalog is available.
Connections and Airtightness
We use several types of flanges, which are made from thicker steel (usually 1.0-1.5 mm) than the duct itself:
- Integrated Flanges (TDF/TDC): The modern standard, ensuring fast installation.
- Slide-on Flange and Corner System: A classic and reliable assembly method.
- Steel angle iron flanges: Used for high-pressure systems and large-section ducts.
All our products can be manufactured to meet airtightness classes B, C, and D according to the EN 1507 standard. To achieve high airtightness classes, a comprehensive approach is used:
- Silicone or EPDM gaskets in flange connections;
- Special sealant for additional joint sealing;
- Quality control of the assembly at every stage.
Manufactured Components
We custom-manufacture a full range of straight sections (standard length 1250 mm) and fittings:
- Bends (90°, 45°), transitions, offsets;
- Tees, crosses, tap-ins;
- End caps, dampers, and other components.
Professional Installation
In addition to manufacturing, we offer ventilation system installation services. Our experienced teams perform the installation in strict accordance with the building codes of Latvia and the EU, ensuring the designed airtightness and efficiency of the system.
Gallery: Rectangular Ventilation
Quality Assurance and Certification
Rectangular ventilation systems comply with standards EN 1505 (dimensions) and EN 1507 (strength and airtightness), while load-bearing steel structures are manufactured according to EN 1090. This ensures compliance with European requirements for strength and airtightness.
View Certificates →
Have questions about system selection or kitting? You'll find answers in our FAQ section.
Need a Consultation or a Project Quote?
Contact our specialists to get a quote and complete kitting for your project. We guarantee precise compliance with drawings and adherence to deadlines.
