Plastic ducts for ventilation: types and sizes

Throughout his entire existence, man strove to make life more convenient and comfortable. For this, many devices were invented. For example - plastic ducts for ventilation. The size and species diversity of these devices allows you to satisfy almost any request.

Introductory information

This is a very popular element of home improvement. Plastic ducts are in great demand than metal counterparts, since they are quite cheap and have several advantages. Therefore, it is not surprising that buyers most often lean toward such a choice. For example, plastic air ducts for ventilation (in St. Petersburg and other cities of the country it will not be difficult to buy them) in some cases can give a gain several times in price with the same quality. Now let's talk about the types and sizes.

About Diversity

Plastic ducts for ventilation are:

1. Rectangular design. Typical sizes: 110x55, 120x60 and 204x60 millimeters. A feature of these structures is a double excess of width over height. Such options are well suited for creating compact ventilation systems in residential premises. This is because they are not difficult to hide. For example, with a hinged or multi-level ceiling. In addition, they are easy to install and mount. It is not surprising that air ducts in a rectangular design are the most bought and popular. In addition, despite the fact that there are no roughnesses inside, the rectangular shape itself provides resistance to the passing air. This must always be taken into account when constructing a structure. In addition, it is desirable to refuse to install the hood where there is a possibility of deformation and / or damage to the material due to high temperatures. After all, plastic ducts do not provide for such options.
2. Round execution. As a rule, they are found in the performance of 100, 120 and 140 millimeters. This species has a very low air resistance. This fact must be taken into account when calculating the system operation scheme. In addition, due to aerodynamics, such structures are almost silent. In addition, the installation of such a system allows you to do with fewer materials. Although the round duct is much harder to hide.
3. Flexible execution. It can have both a rectangular and a round section. Among their advantages, easy repair, installation, cutting and fitting to the necessary parameters are mentioned first of all. These structures can be rotated in any direction without problems, fold and bend. In this case, the material itself is not damaged. But during installation, it is best to use them unfolded. After all, this will positively affect the terms of operation. Flexible ducts are often used together with other types thanks to special connecting plastic elements. But it must be borne in mind that the resistance in them will be quite high, that is, the design will turn out noisy.

Features of the use of plastic

So, it has already been considered that there are different plastic ducts for ventilation. The types of these structures will be touched more than once. But why is this material chosen? This is due to the fact that it is durable and very reliable. Let's look at what can be found on the shelves of our stores. What plastic ducts are offered for ventilation? Ventilation in Perm, for example, and in other cities is offered from the following:

1. Low pressure polyethylene (HDPE). It is used in domestic and industrial construction. It can withstand a wide temperature range from -40 to +80 degrees Celsius. It tolerates sudden changes and an aggressive chemical environment.
2. Polyvinyl Chloride (PVC). Reliable and durable material. Its operation, as a rule, is designed for more than forty years. Does not emit extraneous odors, is environmentally friendly to the environment and humans.
3. Polyvinylidene Fluoride (PVDF). It is a representative of fluoroplastics. It can withstand temperatures ranging from -10 to +140 degrees Celsius. It is highly resistant to mechanical, physical and chemical influences. It is widely used in the pharmaceutical and chemical industries to create ventilation systems and pipelines.
4. Polypropylene (PP). It is a durable, frost-resistant, reliable and highly UV-resistant material. It is it that is used most often during repair work and in domestic construction in residential premises and office buildings.

What are the pros and cons of using them?

Speaking of plastic ducts for ventilation, sizes and types, purpose and specifics, it is simply impossible to ignore this topic. Among the undoubted advantages should be mentioned:

1. Smooth inner surface.
2. Resistance to corrosion.
3. Ability to use over a long period.
4. Low price.
5. Easy to install.
6. Environmental friendliness.

We should not forget about the pleasant fact that, unlike metal products, plastic does not rust. It creates fewer obstacles to the air for passage, has a light weight and low price. But, alas, not without flaws. The most significant is the difficulty of maintaining temperatures of more than 80 degrees Celsius. Whereas for metal products and 1000 is not the limit. All the rest are so insignificant that they can be safely ignored (as a slightly greater chance of damage).

Requirement calculation

Nowadays, you can find a large selection of a variety of air ducts, as well as fittings for them. Thanks to this, you can create a complete system yourself. The fittings allow you to lay the air line in any direction, change flat pipes to round and vice versa, turn the flow by ninety degrees. In all these manipulations, one thing is critical: the correct calculation of work. If we allow the occurrence of errors in the calculations, then after the duct is installed, it turns out that he can not cope with his own task. As a result, the air circulation in the room is disturbed, its humidity increases. And this can lead to damage to fresh repairs and even negatively affect the health of people living in the building. It should also be borne in mind that the more turns there are in the air line, the lower will be the speed of the air moving along it. You can deal with this on your own. But if there is no necessary knowledge, it is better to entrust everything to a specialist. And then to establish the design, according to good calculations, it will be no longer difficult. After all, it remains only to acquire the necessary fittings, channels and, as a conclusion, to divide them into segments of suitable length. Or order a ready-made system from the manufacturer that will correspond to the calculations.

Installation tips

Let's say that plastic ducts for ventilation were purchased at Leroy Merlin. How to install them? To do this, you must adhere to the following procedure:

1. Cut the channels into pieces of the required size. This can be easily done thanks to the hacksaw.
2. Assemble complex and large ventilation units using fittings. Holes are made in the details, the fittings are supplemented with bolts.
3. By means of a special tape or sealant joints are processed.
4. Marks are made on the ceiling and walls in places where shaped parts will be fixed.
5. Large nodes rise to the installation site and are fixed thanks to the clamps and brackets that are attached in advance.
6. The remaining small parts are mounted.
7. Every joint and joint is sealed.

You can use welding for bonding. But only in this case, if a desire arises to disassemble the structure, it will not work. If it will be necessary to pass the duct through the wall, then a special adapter should be used - a sleeve. It will provide strength and prevent damage and breakage. Also, the dimensions between the individual fasteners should not exceed a distance of one meter if horizontal installation is carried out, and 1.8 m - when mounted vertically. In this case, it is necessary to ensure that the meter section sags no more than five centimeters. In the opposite case, you need to fix the duct using an additional clamp. Also keep in mind that corrugated ducts must not be bent at an angle of more than ninety degrees during installation.

Different points

Ducts made of plastic are not without reason such demand in our time. Speaking generally and generally, they provide superiority over all metal analogues in numerous parameters, with the exception of only heat resistance. But if the standing challenges are correctly assessed, a competent ventilation plan is drawn up, the necessary channel sizes are selected, then this design can last a long time, pleasing with its quality. You should also mention about rectangular plastic ducts for ventilation. They are very compact. True, often their appearance is knocked out of the general interior. In this case, most often the structure is sewn up with plastic of the desired color or hidden in a drywall box, which is subsequently finished. Although there is a simpler option - to cover the channels with a film of a suitable color. And once again it is necessary to recall that plastic ducts are not intended to be placed directly above the stove of the kitchen.

Selection process

Suppose you need to purchase plastic ducts for ventilation in Yekaterinburg. In this case, it is better to focus on the offer of goods, which is designed for a service life of fifty years. To avoid fakes, it is necessary to ensure that the purchased product has the following properties:

1. Did not change color.
2. Possessed heat and sound insulation.
3. It was convenient for installation.

Additionally, you can pay attention to flexibility, not sky-high price tag and durability. So, for example, if we talk about a structure made of ABS plastic and having a thickness of three millimeters, then a quality product will cost from 400 rubles per meter. If you do not plan to lay over a long distance, then the rectangular option is suitable. But if the route is large, then it is better to make such a choice - round plastic ventilation.

Round plastic ducts are suitable for large rooms. For example, they can most often be observed at industrial facilities, as well as in the basements of large houses. For kitchens, it is best to choose specialized ducts. Such designs are not afraid of alkaline and acidic fumes, do not create resistance to air flow due to the fact that they are smooth from the inside.

In general, in many cases it is critically necessary to take into account the specifics of the surrounding conditions. For example, in industrial facilities, plastic products are not very common due to the large number of alkaline and acid fumes. In such cases, the use of metal structures will be more preferable. Although they often require cleaning, they are not so quickly corroded by aggressive factors.

Technical features

Plastic ducts are much easier to handle. So, if necessary, make holes or saw off part of the pipe, this will not be a problem. In accordance with current GOST, air ducts must have a diameter of from 100 to 2000 millimeters. Of course, for these purposes it is possible to use pipes with a different cross section, but this is unlikely to achieve the desired goal. If you plan to act independently, then for the installation of the structure you will need certain tools. A sharp knife, side cutters, protective gloves, a hacksaw, a brush and a pencil / felt-tip pen should be mentioned as the most primitive set. You should also stock up on the following materials: mastic, sealant, and fasteners. In addition, it is also necessary to take into account the fact that the air flow is in a spiral. If you do not take into account these physical features, you will get a system with an increased noise level, which will also wear out quickly.

Conclusion

So it was examined what plastic ducts for ventilation are. The assortment nomenclature offers a wide selection of different executions literally for every taste - length, width, wall thickness, execution - all this can be used as a selection parameter. Everything rests on needs, desire and financial capabilities. You can do everything yourself or seek help from specialists.

If funds allow, then the second option is more preferable. Although in the presence of skilled hands or financial constraints, the possibility of independent installation of the air duct should not be ruled out. Although just knowing about its types and sizes is clearly not enough for this. But this is a completely different topic. And readers, once determined, can purchase plastic ducts for ventilation at Leroy Marlene or another specialized store.