Plastic air ducts for ventilation: pipes and rectangular ducts, types and sizes of elements, design features

The ventilation catalog contains rectangular air ducts, which you can buy with convenient delivery conditions in St. Petersburg and the Leningrad region. It is also possible to send orders to other regions of Russia. We offer exclusively high-quality products that comply with the standards of SP 60.13330.2012 (SNiP 41-01-2003) “Heating, ventilation and air conditioning”, characterized by reliability, ease of operation and high performance.

Application area

Air ducts are used in the ventilation system. They provide an air channel through which gases are exchanged. Based on SNiP 41-01-2003, plastic structures can be used for ventilation in one-story buildings - residential, as well as public and administrative.

But use is strictly prohibited in:

• basements;
• attic spaces;
• technical premises
• in areas with high fire hazard.

An example of the placement of ventilation shafts in the kitchen Source blog-potolok.ru
Plastic pipes for ventilation are the optimal solution for country houses. They are easy to install and, if necessary, can be ergonomically integrated into the design of the room.

Features of connecting and shaped parts

In addition to the galvanized rectangular air ducts themselves and devices for air distribution, the design of the ventilation system includes various fittings and fittings. They are designed for fastening individual components and are used when creating turns/transitions.

The main list of such design parts:

• Bends (45 and 90 degrees). These products are used when it is necessary to connect short branches and a rectangular air duct.
• Transitions with right angles, having openings for the entry/exit of air mass flows. They are used when connecting lines with low capacity and trunk channels.
• Insets. Designed to connect new pipes to the main line of the ventilation system.
• Clamps. Using these fasteners, a rectangular air duct is fixed to supporting structures.
• Tees/crosses. They are designed for attaching auxiliary lines at an angle of 90 degrees.
• Translations. Used when installing pipes with a round cross-section on a pipeline with a rectangular cross-section (if required by the project).
• Ventilation hatches. By using them, you can design outlet openings on the ventilation system.
• Dampers. They allow you to automate the operation of the ventilation complex.
• Plugs. The products will protect against dust and moisture entering the interior of the room.
• Shiber. Such an element is capable of regulating the force emanating from the stream of moving air masses. It can be used if a number of sections are disabled as necessary.

Design differences: shape, size, material

The most common and popular sizes of channels and pipes are as follows:

For round pipes:

For square:

Diameter, length, width and height of the air duct elements Source blog-potolok.ru
Additional designations D1, b1, a1 are indicated to display the wall thickness. As a rule, they are 3-5 mm.

Material

The term “plastic” hides a group of polymers with different characteristics and properties. The most important indicator is the range of temperature differences withstand.

PP is excellent for kitchen hoods. The material perfectly resists chemical damage and is easy to clean. If there is a heating element in the room (stove, radiators, etc.), then choose PVC or PVDF.

See also: Catalog of companies that specialize in ventilation and air conditioning.

Straight seam and spiral

Air ducts in which the weld seam connecting the two sides of the metal sheet runs along the longitudinal axis of the air duct are called straight-through ducts.

Spiral ducts are either spiral-locked or spiral-welded. Spiral locks are made from cold-rolled steel or galvanized tape. They have the following advantages:

• have unlimited length of air ducts
• increased rigidity compared to straight-seam
• good appearance
• high seam density

The disadvantages of the design include the fact that 12-15% of the metal is spent on the formation of a seam seam.

Spiral welding is made from hot-rolled steel strip; the air duct joint is welded using an overlap seam. This design has two advantages:

• lower metal consumption for the formation of a weld compared to straight-seam and spiral-lock air ducts
• non-scarce steel strip is used

The disadvantage of the design is the impossibility of manufacturing air ducts from metal with a thickness of less than 0.8 mm.

Ventilation elements

The complete structure consists of the following components:

1. air channel (round or rectangular);
2. connectors;
3. adapters;
4. knee (90 degree rotation);
5. splitters;
6. wall linings (inserted into the wall and connected to the channel);
7. holders (for ceiling mounting);
8. protective grilles.

All parts are connected in series, as in a construction set.
Source dachnaideya.cx.ua Plastic ventilation elements are assembled sequentially from small blocks into a single system. The fastening points are insulated with a special compound and sometimes sealed. This is necessary so as not to disturb the air channel; any unplanned hole impairs the flow rate.

How the diameter is selected

When designing, engineers carry out mathematical calculations and then compare all the values ​​according to the table. Below is a table comparing parameters and air flow speed.

Detailed calculation guarantees the efficiency of the system Source stankoforum.net

The diameter of the duct is determined based on the volume of the room or the performance of the overall system. The volume and speed of air circulation is controlled according to regulatory documents. The picture shows air exchange rates per 1 family member for the premises of a private house.

Each room has its own air exchange rate Source homemyhome.ru

The types and sizes of plastic air ducts for ventilation are selected individually based on engineering calculations. It is important to consider system performance and airflow speed. If it is exceeded, there will be a regular draft, otherwise air stagnation occurs.

Which duct to choose: round or rectangular

Round pipes have better aerodynamic properties. But due to their shape, they are inconvenient to hang and embed in the wall.

For this reason, plastic rectangular ventilation can be seen in most homes. The shape features impair aerodynamics, but such channels are more convenient to install under the ceiling or along the wall.

Rectangular channels can be easily hidden or integrated ergonomically into the design. Source fasaddomstroy.ru

If aesthetics are not important in the room, use round parts. If ventilation is part of the design, then it is preferable to use rectangular ducts. In terms of money it comes out about the same.

Advantages and disadvantages

Compared to other materials, plastic products have the following advantages:

1. Low price .
2. Easy to install.
3. Prefabricated structure with a butt system.
4. Good aerodynamic properties .
5. There is no hum (iron structures hum a lot).
6. Do not rust.

Disadvantages include:

1. Flammability . When a fire occurs, acrid smoke appears. The integrity of the structure is compromised and harmful gases quickly spread throughout the room.
2. Electrification . Due to constant movement, plastic accumulates a static charge and attracts dust. This increases the fire hazard level.

The main problem is the high risk of fire. Because of this, according to SNiP requirements, it is prohibited to install plastic ventilation in large buildings and underground. In the event of a fire, the plastic will melt and acrid smoke will spread through the air ducts throughout all rooms.

Plastic easily ignites, therefore it is prohibited and is not used in the ventilation of large buildings Source cs.aviarydecor.com

Excellent quality and low cost

VINTEL products are famous not only for their reliability, but also for their low prices. We produce our products ourselves and sell them without intermediaries. That is why an exhaust duct fan or a steel semi-vent on the website vin-tel.ru will have a much more attractive price than on similar resources.

Just select a product and leave a request. The company manager will contact you in a few minutes and help you clarify the details of the order, such as: the required thickness of rectangular air ducts made of galvanized steel, the number of products, acceptable price, delivery time and place.

Payment is made in cash or by bank transfer.

Delivery of goods operates in the cities of Moscow, St. Petersburg and other, even the most remote regions of the Russian Federation through the selected transport company.

Features of the arrangement

Regardless of the type of ventilation, it consists of two components:

• Supply channel;
• Exhaust pipe.

The purpose of the pipes is to ensure air circulation, which is carried out due to the difference in pressure outside and inside the building, or by a fan.

Ventilation consists of supply and exhaust pipes Source moyavtomagazin.ru

Installation is carried out after drawing up a wiring plan for all rooms of the building. When making calculations, it is important to take into account many factors: flow speed, system performance, air movement, etc.

After precise planning and calculations, the installation of plastic air ducts begins. This process is quite simple, but has a number of features:

1. Vertical (exhaust) pipes should not have horizontal branches . If they are created, they should be included in the calculation of the overall system performance.
2. Plastic parts must be hermetically adjacent to each other . All cracks are coated with sealant.
3. In difficult places, the use of corrugations is allowed . But it is often not recommended to use them, since they have low aerodynamic properties. Corrugations are used without reserve so that the cross-section does not change during use (affects the overall resistance).
4. Plastic parts are installed after preliminary cleaning of the installation site from dust. All connections are treated with an antistatic agent to prevent small particles from clogging the free space.
5. When purchasing material, you need to count on a certain supply - both the pipes themselves and the fasteners. It is very likely that during construction some areas will need to be further strengthened.

Corrugations are semi-rigid air ducts that consist of a wire frame and a plastic shell Source ownerprofit.ru

Air duct price

The cost of air ducts depends on the size and thickness of the metal used. The type of connection, which can be flange or nipple, also influences the formation of the final price. To save money, it is better to purchase products directly from manufacturers, since intermediaries will be more expensive. Many companies resell air ducts; it is better to contact the factory directly.

If you need rectangular air ducts made with integrity and quality, don’t hesitate to contact us! We will quickly complete your order and help with the delivery and installation of air ducts, the price of which will pleasantly surprise you!