A rectangular duct is one of the main parts of any ventilation system. It is in these parts that the air flows. It is important to note here that the duct does not only consist of straight sections. It also includes, for example, fittings that affect the direction of air movement, as well as the connection and separation of ventilation.
General description of the system
Experts recommend approaching the choice of air ducts very carefully and in detail. When choosing, it should be based on the individual parameters of the existing system, as well as on the conditions in which it is planned to operate the network. In order to select the most suitable view as accurately as possible, it is necessary to understand their diversity well.
Firstly, they differ in their appearance; they can be rectangular ducts or round.
Secondly, they are divided into three groups, depending on what material they were made of. Galvanized steel, stainless steel or aluminum can be used as the starting material.
Thirdly, all air ducts can be divided into two categories, depending on their design. They can be straight-seam or spiral.
The last classification for rectangular ducts and others is the way they are connected. Can be used flange connection, rack or by bus and corner.
Description of rectangular systems
The main place for using rectangular networks was industrial facilities and residential buildings. This type of ventilation has two rather important advantages. They are very easy to install, while they will have a good level of tightness. However, you have to pay for everything, and therefore you will have to pay about 20-30% more for the convenience of rectangular ducts than for round ones. Another disadvantage will be that it will take longer to connect rectangular ventilation, since it will be necessary to assemble and fasten the flanges.
Types of parts for the network
The main part of a rectangular duct, of course, is a straight section. The main parameters that can be selected are length, width and height. They can have the following dimensions: from 100 x 100 mm to 2000 x 2000 mm; length up to 2500 mm, however, the standard length of 1250 mm is most often chosen; thickness from 0.55 mm to 1 mm.
Another necessary element, which is very difficult to do without, is a ventilation outlet of 45 and 90 degrees. The main purpose of this part in rectangular ducts is to change the direction of air flow in the network. In their dimensions, they can be from 100 x 100 mm to 1200 x 1200 mm.
Quite often, such a thing as a ventilation tee is used. This element is used if there is a need for branching ventilation. The advantage of the design is that it is multifunctional, that is, there is no need for additional installation of the adapter on a rectangular section. If there is a need to order a non-standard size tee for a rectangular duct, then you need to specify such parameters as H - height, L - length, R - radius.
Production
Many companies, including Lissant, Venti, Ice Comfort, Convent, Eurosphere and others, are manufacturing rectangular air ducts. A feature of the parts is that their assembly is quite fast, the parts themselves have a fairly good price. This saves a certain amount of material resources, and proper assembly will ensure the availability of a strong, reliable and well-sealed ventilation system.
For the production of all elements, the latest technologies are used to avoid disturbance of the zinc coating at the seam joints. In order to facilitate the assembly process, give greater rigidity and attach additional rectangular elements to the structure, you can also purchase a connecting rail with corner elements. The main purpose of this part is to increase stiffness and prevent damage that may occur during transportation.
The advantages of rectangular elements
If we compare the installation process of rectangular systems with round ones, the first ones will lose. The first group will win only by such a parameter as aesthetics. It is also worth adding that a rectangular network most often takes up less space than a round one.
A rectangular galvanized duct has certain advantages that allow it to remain in the top lines of sale:
- The cost of such systems is lower than other metal ventilation.
- Galvanized coating significantly increases heat resistance, as well as fire resistance.
- Important parameters were the durability and quality of the system, assembled from rectangular parts.
- Maintenance and production of such elements is quite simple.
- Rectangular galvanized steel ducts resist corrosion even when outdoors. In addition, the owner will not even need additional painting or a primer.
- The light weight of the structure greatly facilitates the transportation procedure.
- It is possible to adapt the entire structure to individual customer requirements.
- Easy installation process.
Disadvantages and manufacturing process
These systems have several drawbacks. For example, welded galvanized structures of a rectangular type, however, like all others, are quite easy to deform under mechanical stress. The second minus is that under the influence of air a thin layer of galvanized steel will produce a characteristic sound. In addition, it will be significantly increased if the ventilation is on the street.
The manufacturing process is quite simple, but high-precision and technological equipment is required, and therefore all manufacturers need to have such machines. As for the rectangular ventilation reviews, they are mostly positive. Despite the fact that the cost is slightly higher than round, buyers still prefer rectangular products. This is largely due to the fact that the installation is much more convenient and they take up less space. In addition, placing them indoors is much easier than round models.