Today, ventilation corrugations are gradually replacing smooth, rigid pipes. This is due to the mass of positive qualities of such products. However, in order for ventilation to perform its functions, it is necessary to choose the right corrugation. It is necessary to pay attention to some parameters of such a product. How to choose the right corrugation for arranging the hood will be discussed in detail below.
Features of corrugations
The ventilation corrugation is a channel made of different materials. It contains rigid rings. They are covered with the main material. This allows you to fold the pipe in the form of an accordion. If necessary, the size of such a product is increased by stretching. At the same time, the length increases many times.
The inner walls of the pipe are smooth. This is a mandatory requirement for such air ducts. In this case, it is extremely important to choose the right pipe diameter. This affects system performance. For thisare guided by generally accepted standards. If the diameter and other parameters of the pipe are chosen correctly, excessive moisture will not accumulate in the room, and fungus will not appear. It will also release odors, dust, etc.
The corrugation bends at different angles. For this reason, its installation does not cause difficulties. Even a master without experience will cope with this task. However, it is extremely important to take into account the basic requirements for conducting this process. Otherwise, the operation of the system will not be efficient and safe.
There are many options for corrugated channels for creating ventilation. They differ in material, resistance to adverse environmental influences, throughput.
Cross section length
The diameter of the corrugated pipe affects the efficiency of the entire ventilation system. The larger the room, the more powerful the hood is installed in it, the larger the size of the cross section of the channel should be. He will be able to pass a certain amount of air per unit time.
In everyday life, the minimum diameter of the ventilation corrugation is 100 mm. This type of pipe is suitable for a small room (for example, a standard kitchen in Khrushchev). The larger the room, the wider the channel needs to be built into the system. For domestic use, the ventilation corrugation has a maximum diameter of 250 mm. Channels from 300 mm and more are suitable for industrial premises, catering establishments, etc.
Most often, the choice of diameter is made in accordance with the parametersforced extraction. It has an outlet of a certain diameter. It is calculated in accordance with the performance, power of the equipment. It is necessary to choose a corrugation of the same diameter. If there is no channel of this size on sale, you can purchase a product with a slightly larger cross section. In this case, it is tightly crimped on the pipe with a clamp.
Under no circumstances should a smaller diameter duct be installed. This will negatively affect the operation of the equipment. It will not cope with the duties assigned to it and will quickly fail.
Wishing to calculate the diameter of the duct yourself, you will need to take into account a number of parameters. You need to know the size of the room, the speed of air movement in the system, as well as the renewal of air per unit of time (m³/h).
Duct price
The cost of corrugated pipes is relatively low. This is the main reason for the popularity of the presented type of air ducts. Prices for corrugated channels are an order of magnitude lower than for similar rigid types of pipes. At the same time, you can now purchase such products in almost any specialized store.
The price of corrugated channels depends on the material of manufacture and the diameter of the pipe. Almost always, aluminum ducts are chosen for domestic use. They are practical, durable and easy to install. Their length is usually 3 m. This is the generally accepted standard. If necessary, you can reduce the length by cutting off the excess with a knife.
Minimum costcorrugated channels for removing moist air from the room is 200-210 rubles. This is an aluminum air duct with a diameter of 100 (110) mm. It is applicable for 5-6 m² kitchen with low power hood.
Ventilation corrugation 125 mm costs a little more. You can buy a similar air duct at a price of 230 rubles. The price may be higher if there are certain improvements in the design. So, channels with reinforced metal rings are somewhat more expensive. In this case, the minimum cost is 270 rubles. This is largely influenced by the pricing policy of the store, as well as the pipe manufacturer.
Ventilation corrugation 150 mm is sold at a price of 350 rubles. Air ducts with a cross section of 200 mm can be purchased for 380-400 rubles
With their low cost, the presented products are also distinguished by low costs for related materials. They do not require additional purchase of adapters, corners. The duct is flexible. Therefore, only clamps are needed to fix it.
Diameter calculation
When choosing a ventilation corrugation from 100 to 200 mm, a simple calculation should be made. In this case, it will be possible to choose an air duct in accordance with the characteristics of the room and its operating conditions.
It is necessary to determine the total area of the room in which it is planned to create ventilation. Next, determine how many people live in the house. This is necessary to determine the air exchange rate. There are certain sanitary and hygienic standards that determine the rate of renewal of indoor air masses.
Yes,each person requires an air exchange of 60 m³/h. If two people live in the house, the indicator, respectively, is 120 m³ / h. Next, you need to use a simple formula:
CT=B3600/C, where CT is the section of the duct pipe, B is the air exchange in the room, C is the air velocity inside the system.
To perform the calculation, you need to look at the instructions of the manufacturer of the hood. The instructions indicate how fast the air moves in the system. Then it will be possible to say which ventilation corrugation (120, 110, 200 mm) is required for a particular room.
Material selection
Ventilation corrugation 200, 150, 110 mm or other sizes can be made from different materials. Most often, the presented air ducts are made of special plastic or aluminum. Both types of materials have their advantages and disadvantages.
The most reliable material for the production of corrugated channels is aluminum. It does not deform under the influence of temperature and humidity changes. Aluminum is a non-combustible material. He doesn't melt. At the same time, when the temperature rises, aluminum does not emit harmful, toxic substances. The ventilation duct of the presented type can be operated at a temperature of +250ºС…-30ºС.
Aluminum is not afraid of exposure to chemicals. Therefore, its service life is long. At the same time, a corrugated pipe made of this material has high aerodynamic qualities. The air inside such a channel moves quieter. Therefore, there is no need to purchase an additional specialsoundproof box. This also reduces installation costs.
Ventilation corrugation. plastic pipe looks neater. Such channels are made of special heat-resistant PVC. Plastic is not subject to corrosion, has small weight. It absolutely does not absorb moisture. However, the disadvantage of plastic channels is their increased noise level. Aluminum is also less susceptible to mechanical stress. Therefore, channels from this material are acquired in the vast majority of cases.
Benefits
By choosing the correct diameter of the ventilation corrugation, you can ensure the correct functioning of the system. It is also important to mount the system in accordance with existing regulations. In this case, the corrugated channel will perform the functions assigned to it. He has a lot of positive qualities. Among them are:
- Ease of installation. The pipe can be bent at different angles.
- The length is simply shortened with ordinary scissors or a knife. No special tools are required for this.
- The length of the channel can vary from 1 m to 3 m. To do this, you just need to stretch it. Even if the master made mistakes when calculating the ventilation route, he can easily compensate for them.
- A huge selection of corrugated pipes is on sale. Their diameter can be matched exactly to the operating characteristics of the system.
- Light weight. Both aluminum and plastic channels weigh a little. It also simplifies installation.
- No need to installadditional adapters. Only a few clamps are needed to fix it.
- The cost of corrugated ducts is negligible.
- Long service life. Materials that are approved by the standards for the manufacture of ventilation ducts are resistant to negative influences. Therefore, they do not collapse for a long time.
The above reasons explain the popularity of corrugated pipes for ventilation. However, before buying, it is worth considering the negative qualities of the presented products.
Flaws
Any ventilation corrugation (100mm, 125mm, 200mm, etc.) made of aluminum or plastic has certain disadvantages. You should know about them before buying.
Pipes quickly become covered with dirt and soot from the outside. Washing the ribbed surface that air ducts have is quite difficult. Dirt remains in the roughness. If you make physical efforts to wipe off the sticky coating, you can damage the channel. It may deform. It may also break its tightness. Because of this, the entire exhaust system will not be able to perform the functions assigned to it.
If you stretched the pipe, it will be problematic to assemble it in its original position. In this case, any mechanical manipulations can lead to damage to the channel. Such material must be handled with care. Bends and dents are especially dangerous. They affect the aerodynamics of the tube.
The speed of air movement inside the corrugated channel is less than in a smooth and rigid pipe. Therefore, in terms of performance, the presented varietiesinferior. They can be used for small to medium sized rooms.
Mounting Features
The ventilation corrugation for the hood is mounted in accordance with the established rules. First you need to prepare a sketch, which will indicate the size (in scale) and the position of the channel in the room. Also, the dimensions and configuration of the room should be indicated on the drawing. You should think in advance about the location of the ventilation duct, as well as all its elements.
You will need to purchase materials. The pipe is selected in accordance with the characteristics of the operation and performance of the system. Clamps required. With their help, pipes are fixed on the flanges. Also, such fasteners allow you to install the channel at the required height.
You will also need ventilation grilles. One of them should have a non-return valve in the design. It will not allow cold air from outside to enter the room. This will reduce heat loss during the cold season. During work, aluminum tape and sealant (sanitary silicone) may be required.
If the outlet of the hood is not round, you will need to purchase the appropriate adapter. Its cross-sectional area must be the same on both sides. Only the shape is different.
Installation of the system
To mount the ventilation corrugation, you will need to perform a series of sequential steps. First, the channel is stretched to its full length. If required, the excess piece of the duct is cut off. The outlet of the hood is treated with a sealant. You need to put it on (to the stop)corrugated channel. Next, a crimp collar must be put on the junction. It is tightened, ensuring the tightness of the joint.
Further, at a distance of no more than 1 m from each other, clamps with a dowel are installed. They will keep the duct in the correct position. In this case, the corrugated sleeve can be fixed on the wall or ceiling.
Next, the second end of the duct will need to be connected to the ventilation grille. The procedure is the same as for the hood outlet. The edge is treated with a sealant, and then a corrugation is put on it. It is fixed with another crimp clamp. After that, the ventilation grille can be installed in the place provided for it. To do this, use self-tapping screws or special glue.
Completing installation
The equipment is connected to the network (after the sealant has hardened). Next, the system is tested for performance. An ordinary sheet of paper is brought to the grate of the hood. If it sticks to it, then everything is done correctly. Otherwise, you need to look for an error. The system is most likely leaking.
If desired, the channel can be hidden with a decorative box. However, if the route is going to be laid on the surface of tall cabinets, this is not required.
After considering the features, advantages and disadvantages of the ventilation corrugation, as well as the rules for its selection, you can purchase a suitable duct. Its installation is quite possible to do it yourself.
