For the effective functioning of ventilation and chimney systems, stable natural draft is required. Only under this condition will normal air circulation and effective removal of combustion products occur. To prevent foreign objects and precipitation from entering ventilation and smoke ducts, as well as to protect the internal surface from soot and fat deposits, deflectors are widely used.
A modification of the TsAGI type deflector is one of the most common among such devices. This article will discuss the design features, operating principle, pros and cons of this device.
Types of deflectors and their purpose
There are several types of deflectors, which are based on the same principle of converting wind force into a directed air flow that enhances traction.
In practice, five main types of deflectors are used:
- TsAGI is a development of the Central Aerohydrodynamic Institute. One of the most common types of devices, consisting of a metal pipe, inside of which there is a shielding cylinder and a conical protective umbrella. The design prevents the so-called the draft blocking effect due to strong wind loads, and also protects the chimney from clogging and atmospheric moisture.
- Volpert - practically no different from the TsAGI deflector, but has a slight design difference: the visor to protect against clogging is located above the diffuser, and not inside it.
- The Grigorovich deflector is the most popular type of device, which is a truncated cone that expands at the bottom. At the top of the deflector there is a protective cap mounted on mounting studs.
- An H-shaped deflector is a more complex structure, consisting of a horizontally located metal pipe into which several pipes are vertically embedded. The horizontal and vertical parts of the pipes form a structure in the shape of the letter “H”. Such a deflector is considered very effective in enhancing draft and protecting the chimney from moisture and debris.
- Disc device - is a truncated cylindrical cap, similar in shape to a plate. An upper visor is attached to it on mounting studs, protecting the pipe from precipitation and creating a directed air flow.
We recommend that you read: Is it possible to build ventilation in a private house from plastic sewer pipes?
The types of deflectors described above refer to static structures. In addition to them, there are two types of movable aerodynamic devices for chimneys.
- The rotating deflector is a circular structure with blades located in the same direction. A spherical mini-turbine protects the chimney well and creates strong draft, but when there is no wind its efficiency is almost zero.
- Vane - the design principle is clear from the name. The deflector consists of metal canopies connected in series, fixed on a special weather vane that allows rotation. Canopies protect the chimney or vent from precipitation and pollution, but also require constant movement of air masses.
Regardless of the design, all types of deflectors work to enhance draft in the chimney and protect it from precipitation and foreign particles from the external environment. The difference between them is due to the device, which corresponds to different operating conditions.
These may be weather and climatic conditions in the area, the presence of natural or man-made barriers to the wind (trees, houses), as well as the shape of the roof and the design of the chimney.
Features of selection
The design of the caps is not complicated, but despite this, buyers should pay attention to the following points:
- the material from which the deflector is made;
- How does it work;
- take into account all the features of the device.
The choice is also made taking into account:
- if there is little or no draft, you should choose rotary or weather vane nozzles;
- when purchasing a rotating attachment, you should know that inexpensive devices work using an open bushing, which freezes in winter; it is recommended to pay attention to those that have a closed hinge;
- caps in the shape of the letter H are perfect for areas where there are strong winds.
Dynamic hoods are suitable for all types of terrain, but they must be serviced periodically.
Installation
The installation process is simple, but it should be remembered that not all actions are carried out directly on the roof, since the cap and the base of the device should be connected in advance, for convenience. So, the installation consists of:
- from installing the device on the inlet duct and securing it to it, this is done with special fasteners or bolts. In the second case, you will need to drill inlet holes for them;
- securing the diffuser funnel with clamps or brackets;
- placing the cap on the diffuser.
The last two steps are carried out before installing the device on the ventilation duct.
Experts in the field of installation of such structures recommend following some tips:
- The device is installed both on straight and pitched roof surfaces, chimneys and ventilation. The choice of location depends directly on the purpose for which it will be used.
- If the surface is sloping, then it is necessary to install it at the highest point; on a flat surface, before installation, the possible height of the snow cover is taken into account and placed higher. It is recommended to set the level to at least 18 cm.
- To avoid heat loss during the cold period, it is possible to install special dampers for residential premises and adjustable air intakes for non-residential premises.
When installing the device on a chimney, remember that it automatically extends its height.
Review of popular models
Let's take a closer look at the most common models of deflectors.
Ventilation deflector Tsaga
This model is considered the most popular. This device has a larger diameter than the chimney. Air flows flow around the device from all sides, as a result of which areas of high pressure are formed on the sides, and a vacuum occurs in the rear and front zones, increasing traction.
The design of such a product eliminates the protection of the chimney duct from precipitation. Therefore, after installing this device, additional installation of a protective cap is required.
The Tsaga deflector is suitable for use in both chimney and ventilation systems
Disc-shaped
A simple model that ensures fairly efficient operation of the system and high traction. The two main elements of the device form a protective canopy that prevents snow and rain from entering the chimney channel.
The lower part of the visor is covered with a cap, which is directed towards the chimney. This design allows the device to cope with the tasks assigned to it. The air flow can enter such a deflector from any side and, finding itself between the cones that form a narrowed channel, cause a vacuum.
Ball-shaped "Wolper"
This model has an almost identical device to the TsAGI deflector. However, there is one difference - the canopy, which protects the chimney channel from precipitation and debris, is located above the diffuser.
Grigorovich deflector
A very popular deflector model that increases draft in chimney and ventilation structures. This deflector is easy to assemble with your own hands. The design of this device includes the following components: a lower cylinder with two pipes, an upper cylinder, a cone and two brackets.
The smoke coming from the pipe ends up in the narrowed channel of the diffuser, causing a vacuum to occur. To assemble such a device, as a rule, a tin sheet or galvanized steel plate is used.
The Grigorovich deflector has a very simple design and is often made by hand
H-shaped
This model is used mainly in manufacturing plants or boiler houses that have high power. The installation of an H-shaped deflector occurs as follows: a pipe of a similar size is attached to the mouth of the pipe. In the central part of the pipe there is a special insert, which ensures a tight connection of the device with the chimney pipe. Two more tubes are fixed to the transverse pipe on the right and left, resulting in a device resembling the letter “H” is formed.
This design does not require a protective canopy, since the mouth of the chimney is already protected by horizontal parts. The H-shaped deflector enhances traction in any direction of air flow.
Rotating
Such a device rotates only in one direction. The circular motion provides additional efficiency of the device. In addition, this model provides protection for the pipe from precipitation and debris. Often used for gas-fired boilers.
Deflector "weather vane"
This model includes a rotating body. This device includes the following elements: weather vane, visors, bearing assembly. The rotation of the device is carried out due to the force of the wind acting on the weather vane. The weather vane type chimney deflector works on the principle of a ship's sail.
The weather vane deflector has a part in its design that rotates when the wind blows
The operating features of the device are as follows: air flows pass between the visors, so the air becomes rarefied. This model allows you to increase draft in the chimney, eliminate reverse draft and the formation of sparks.
What is a deflector?
A deflector is an additional device, or rather a nozzle, that fits onto the outlet of the ventilation duct, which, under the influence of wind, creates a vacuum and thereby reduces the aerodynamic resistance of the flow of air masses at the outlet. In addition to creating additional traction, the device also:
- performs protective functions and does not allow precipitation to enter the air duct;
- protects against wind, various debris, and birds getting inside the pipe
- prevents the formation of reverse draft and the accumulation of fat on the walls of the air duct system;
- The device also extinguishes sparks and removes smoke.
The basic principle of such a device is based on creating a vacuum and increasing the force of air flows. Some manufacturers equip structures with electric fans.
Causes of smoke
The principle of operation of the deflector as a gas exhaust structure
Smoking in the furnace is most often explained by the so-called “draft failure”, which occurs due to the heating installation being idle for a long time. This leads to cooling of the internal spaces and a decrease in the pressure gradient. As a result, the air flow in the pipe changes its direction and rushes not outward, but towards the heat source.
This phenomenon has nothing to do with the outside temperature and can occur in hot weather and cold weather. To eliminate the effect of backdraft in the chimney, you will need to increase the temperature in the outlet pipe. One of the ways this can be achieved is by installing a high-quality chimney deflector.
Installation of wind hoods
When installing the deflector, it is necessary to take into account SNiP standards.
Requirements for the height of the ventilation pipe and nozzle:
- if the ventilation duct is located less than 1.5 m from the top of the roof, then the height above the ridge should be more than 50 cm;
- if the distance is from 1.5 to 3 m, then on a par with the roof;
- at a distance of more than 3 meters, the nozzle should be no lower than a line drawn at an angle of 10 degrees, from the top point downwards;
- if the roof is flat, then the height of the nozzle is at least 50 cm.
Do not install deflectors in areas of the aerodynamic shadow of neighboring buildings.
TsAGI deflector design
The most common option for installation in a ventilation system is the TsAGI deflector. A simple device consists of the following elements:
- A diffuser, which is a part of a pipe having the configuration of a truncated cone. The narrow side is mounted on the pipe.
- The top is in the form of a cap or umbrella that protects the channel cavity from the penetration of precipitation and debris.
- A ring fastened to the outside of the diffuser using brackets.
- A pipe mounted on the head of the ventilation duct.
- Brackets for fastening the cap.
An exhaust ventilation deflector of this design is common in the construction market; purchasing the device is not difficult. If you wish, it’s easy to make it yourself, the main thing is to correctly determine the size and purchase the necessary materials. The best option is considered to be galvanized and stainless steel; tin and aluminum are less commonly used. There are also plastic products on sale, which have low prices compared to metal products.
In calculations, as can be seen from the deflector diagram, one should start from the value of the diameter of the ventilation shaft. Therefore, you need to measure carefully.
Independent production and installation of the device
You should start working with certain skills and self-confidence. For devices of standard sizes, the numbering (3-10) indicates the diameter of the ventilation outlet in decimeters. You should not resort to changing standard forms in order to avoid violating technical specifications. Having prepared the tools and a metal sheet 0.3-0.5 mm thick, we make patterns on cardboard for the main elements of the device - a diffuser, a ring, an inlet pipe and an umbrella. Brackets can also be made with your own hands from strips of galvanized metal 15-20 mm wide. Making patterns for the inlet pipe and the outer ring, shaped like a rectangle, will not take much time. A pattern for an umbrella is made as follows:
- A circle with a diameter of 1.7 is drawn, as in the diagram of the calculations performed.
- The radius is made by two lines separated at the bottom by an angle of 30º.
- When cutting out patterns, the area formed between the radius lines is removed.
- diameter of the air outlet channel;
- diffuser height;
- diameter of the circle corresponding to the increase in the diffuser in the wide part.
Cardboard patterns are placed as compactly as possible on a metal sheet and outlined with a marker. To cut, use a grinder or metal scissors. Having drilled holes at the joints, we fasten the elements using bolts or rivets. Having finished assembling the device, we proceed to installation. To fix the lower cylinder, bolts are used, a bracket is used to fasten the diffuser, the legs of the umbrella are also fixed with bolts. Far from being the most complex device, with a certain amount of skill, it can be quite successfully manufactured and installed with one’s own hands. The TsAGI deflector, if all work is carried out correctly and properly maintained, will be able to serve for quite a long time, while performing several functions at once and providing people with comfortable living conditions.
Protection of deflectors from low winds
Due to the presence of this feature of wind flows, deflectors began to be equipped with special protective devices that help increase the level of draft in the pipe in any weather. To do this, an axis is installed inside the chimney on two bearings located at different levels.
A semi-cylindrical screen, a weathervane and a cover are installed on the axis. It is this design that protects the entire chimney from the effects of the lower wind flow.
After the direction of the wind flow changes, the weather vane rotates, thereby closing the chimney from the wrong wind flow. Thus, any direction and strength of the wind is not able to block the path of the exhaust smoke, and the draft in the chimney remains the same power.
Do not forget that the deflectors are designed for round pipes, which can become a problem if you have an old brick pipe with a square cross-section. In order to solve this problem, special pipes are used that act as adapters.
For chimneys with a large square cross-section, which are built for fireplace heating systems, it is necessary to use adapters in the form of spacer legs that connect the pipe and the deflector itself. These legs are made of metal strips that can be galvanized or high-quality painted.
Brick pipes require an appropriate transition with an inlet in the desired direction, which allows you to connect a round deflector and a square chimney. In other words, it is not difficult to secure this element of the chimney system in the presence of any type and shape of chimney structures.
You don’t have to buy a deflector at a hardware store, because you can make it extremely easily with your own hands. To do this, you need to calculate the size and shape of the element, after which you can begin the manufacturing process.
On galvanized steel sheet it is necessary to draw the upper and lower cylinders of the future deflector, which can be easily done using an ordinary pencil. You can cut out the necessary elements using metal scissors, which can easily cope with this task.
Once these two parts have been cut and filed, which is required to properly join the two edges of one part, you can begin to secure these edges. As a rule, a welding machine, bolts or rivets are used for this.
It’s worth noting right away that connecting a galvanized steel workpiece using a welding machine is extremely difficult, because it burns through thin metal quite quickly. It is for this reason that rivets or small bolts are most often used.
The finished cone cap must be secured to the upper cylinder of the deflector. This is done using small brackets made of the same sheet steel. The brackets are secured to the pipe using rivets. Do not forget that the brackets should be attached only to the outer side of the deflector, so as not to create additional interference in the internal part for proper air flow and smoke extraction.
A reverse type cone must be attached to the element umbrella. In addition, the assembly of all parts of the deflector must be carried out directly on the pipe itself, which will allow for high-quality installation and fastening of each individual part of the structure.
Otherwise, it is possible to connect two elements of the system poorly, which will subsequently cause a malfunction of the structure and the entire chimney as a whole. In some cases, it is simply impossible to make this design on your own.
As a rule, this happens with brick chimneys, which require high-quality adapters or stands. From this we can conclude that it is much easier, more profitable and faster to buy this inexpensive element of the system than to try to make it yourself.
It is worth recalling that only galvanized steel can be used to make the deflector, which successfully resists the formation of rust, which negatively affects the life and quality of service of such a system element.
Advantages and disadvantages
Like any other product, the TsAGI deflector has its pros and cons. The feasibility of using the product is determined by their ratio. The advantages of the device include:
- reliable protection against foreign objects, birds and atmospheric influences getting inside ventilation ducts and chimneys;
- a significant increase in the service life of the head of ventilation ducts or chimneys. This is due to the fact that the presence of a deflector slows down the process of destruction of the upper part of the air duct caused by adverse atmospheric influences;
- prevention of reverse draft even with a large cross-section of ventilation lines and ventilation ducts;
- possibility of self-production. Thanks to its simple design and the use of available materials, a TsAGI type deflector can be made with your own hands. This does not require special tools or experience as a tinsmith.
A significant drawback is that in completely calm or weak wind conditions, such deflectors can create resistance to natural draft. In addition, if the ambient temperature drops significantly, the outer cylinder may freeze, which can lead to partial or complete blockage of the air ducts.
How to make a TsAGI deflector for a chimney pipe with your own hands
The process of developing and assembling a deflector for a chimney consists of four stages: drawing, creation of blanks, assembly, installation of the structure and its fastening directly to the chimney.
Required Tools
You will definitely need:
- a sheet of thick paper for drawing and layout;
- marker for marking;
- riveter for connecting structural elements;
- metal scissors for cutting out parts;
- drill;
- hammer.
Don’t forget about the necessary tools before installing the deflector
Development of a drawing of a TsAGI deflector model
There is an algorithm for how to make a deflector for a chimney pipe with your own hands. It is recommended to perform the first stage on paper. First you need to calculate the dimensions of the diameter of the nozzle and the upper cap of the structure, and also calculate the height of the reflector.
For this, special formulas are used:
- diameter of the upper part of the deflector - 1.25d;
- outer ring diameter - 2d;
- height of the structure - 2d+d/2;
- ring height – 1.2d;
- diameter of the cap - 1.7d;
- the distance from the base to the edge of the outer casing is d/2.
Where d is the diameter of the chimney.
To make the task easier, a table containing ready-made calculations for standard sizes of metal pipes will help.
| Chimney pipe diameter, cm | Outer casing diameter, cm | Height of outer casing, cm | Diffuser outlet diameter, cm | Cap diameter, cm | Installation height of the outer casing, cm |
| 100 | 20.0 | 12.0 | 12.5 | 17.0…19.0 | 5.0 |
| 125 | 25.0 | 15.0 | 15.7 | 21.2…23.8 | 6.3 |
| 160 | 32.0 | 19.2 | 20.0 | 27.2…30.4 | 8.0 |
| 20.0 | 40.0 | 24.0 | 25.0 | 34.0…38.0 | 10.0 |
| 25.0 | 50.0 | 30.0 | 31.3 | 42.5…47.5 | 12.5 |
| 31.5 | 63.0 | 37.8 | 39.4 | 53.6–59.9 | 15.8 |
If the chimney has a non-standard width, then all calculations will have to be done independently. But, knowing the formulas, it is easy to measure the diameter of the pipe and determine all the necessary indicators to use them when drawing up drawings.
When the patterns are made, it is recommended to first assemble a paper prototype of the future reflector. Even if you are an experienced craftsman and are sure that you can design a deflector for a stove chimney with your own hands without any problems, you should not skip this stage, since it will help you identify possible errors and shortcomings, and correct the calculations or drawing. Only after creating the correct paper layout, which confirms that the deflector diagram is accurate, can you move on to the next stage.
Step-by-step instruction
There is an order of work that must be followed, otherwise you will not be able to connect the individual parts of the chimney deflector yourself with your own hands.
The procedure is as follows:
- Using paper blanks, transfer the template to the surface of the metal from which you plan to make the reflector. Carefully trace the outlines of the paper parts. You can use a permanent marker, special chalk, or even a simple pencil for this purpose.
- Using metal scissors, cut out the blanks of the necessary structural parts.
- Along the entire contour of the cuts, the metal must be bent by 5 mm and carefully passed with a hammer.
- Roll the workpiece into a cylinder shape, drill holes for fasteners so that you can connect the structure with rivets. Welding is permitted, but not arc welding. You need to be careful not to burn the metal. Choose the distance between the main fastening points from 2 to 6 cm, it varies depending on the size of the finished structure. The outer cylinder is rolled up and fastened in the same way.
- By bending and connecting the edges, make the remaining parts: an umbrella and a protective cap in the form of a cone.
- You need to cut fastening elements from a galvanized sheet - 3-4 strips: width 6 cm, length - up to 20 cm. Bend them along the entire perimeter on both sides and go over them with a hammer. From the inside of the umbrella, you need to drill mounting holes, stepping back from the edge by 5 cm. 3 points will be enough. After this, secure the metal strips to the cap with rivets. Then they must be bent at an angle of 90 degrees.
- Connect the diffuser and cone using rivets to the inlet pipe. Having made a deflector for a round pipe with your own hands, you can begin installing it.
A Volper chimney deflector can be created using a similar method. Its design is very similar to the TsAGI model, but there are some differences in the upper part. They are also made of stainless steel, galvanized or copper.
Calculation and drawings
Before purchasing a factory deflector or starting to manufacture the device yourself, you need to carry out an aerodynamic calculation and familiarize yourself with the drawings of existing devices.
The main criterion when creating a deflector drawing is the internal diameter of the duct (D). The figure shows the dimensions of the structural elements.
TsAGI deflector dimensions
- diameter of the upper base of the diffuser – 1.18-1.26D;
- outer char diameter – 1.8-2D;
- outer ring height – 1-1.2D;
- distance from the ring to the base of the diffuser – 0.4-0.5D;
- height – 1.4-1.7D;
- diameter of the cap is 1.3-1.5D.
When making a deflector yourself, it is advisable to follow the SNiP recommendations given in the table.
| Deflector No. | Diameter of the lower base of the diffuser, mm | Diameter of the upper base of the diffuser, mm | Outer cylinder diameter, mm | Diameter of the lower base of the cone, mm | total height of the deflector, mm | Diffuser height, mm | Cone height, mm | Cylinder height, mm |
| 3 | 265 | 380 | 600 | 510 | 510 | 295 | 90 | 360 |
| 4 | 375 | 504 | 800 | 680 | 680 | 400 | 120 | 480 |
| 5 | 495 | 630 | 1000 | 850 | 850 | 500 | 150 | 600 |
| 6 | 595 | 736 | 1200 | 1020 | 1020 | 600 | 180 | 720 |
| 7 | 660 | 882 | 1400 | 1190 | 1190 | 700 | 210 | 840 |
| 8 | 775 | 1008 | 1600 | 1360 | 1360 | 800 | 240 | 960 |
| 9 | 885 | 1134 | 1800 | 1530 | 1530 | 900 | 270 | 1080 |
| 10 | 1025 | 1260 | 2000 | 1700 | 1700 | 1000 | 300 | 1200 |
Deflector installation
The structure can be installed in two ways - directly on the chimney and on a piece of pipe, which is then put on the smoke exhaust duct. The second method is much more convenient and safer, since the most labor-intensive process is performed below, and not on the roof. Most factory models have a lower fitting that is simply slipped onto the pipe and secured with a metal clamp.
Fixed deflector - photo
To install a homemade deflector, you will need a piece of pipe with a diameter slightly larger than the diameter of the chimney and threaded rods.
Step 1.
At one end of the pipe, departing 10-15 cm from the cut, mark the drilling locations for fasteners around the circumference. The same marks are placed on the wide part of the diffuser.
Step 2.
Drill holes in the diffuser and pipe, try the elements on each other. The top and bottom holes must match exactly, otherwise the fasteners will not be able to be installed smoothly.
Step 3.
Thread the pins through the holes and secure them with nuts on both sides on the diffuser and on the pipe. The nuts should be tightened evenly so that the deflector body does not deform.
Step 4.
They lift the structure onto the roof, put the pipe on the chimney and secure it with clamps.
It is very important that there are no gaps between the elements in this area, and therefore the clamp must be tightened very tightly. Additionally, you can treat the joint around the perimeter with a heat-resistant sealant
The installation of such a deflector is performed a little differently, since its design has certain differences. First, three holes are drilled in the chimney at the same level for mounting bolts. The ring part of the device is inserted into the cut of the chimney and secured with bolts. Next, the axle is inserted into the ring bearing, the cylinder is put on it, then the weather vane, and the protective cap. All elements are connected using brackets or rivets.
When choosing a deflector with a weather vane, remember that the bearings require regular lubrication, otherwise the device will not rotate. You should also not allow the hull to become icy, and knock off the ice as soon as it appears.
Video - Making a deflector with your own hands
The chimney is one of the most important components of stoves and fireplaces
Also a very important detail is the chimney cap, which ensures correct and stable removal of combustion products
It is quite possible to install a chimney cap yourself, but first you need to know the characteristics of these devices, their main functions and operating principle. We will also find out what reasons contribute to smoke, that is, the occurrence of backdraft in the pipe. A chimney cap (also called a chimney umbrella, visor, chimney, deflector, weather vane) is an ancient architectural element that in our time bears the imprint of antiquity and refined taste. Some modern chimneys are a real work of art that makes the chimney original and the roof complete.
Purpose
An umbrella is installed on the chimney to enhance draft by deflecting air flows. Deflectors of the correct design prevent atmospheric phenomena from entering the chimney - snow, slanting rain (see).
The chimney canopy also prevents debris and birds from getting inside. To do this, a mesh is installed, which freely allows smoke to escape outside.
Main functions
Thus, the chimney canopy performs the following functions:
- increased traction;
- increase in the efficiency of the chimney pipe (up to 20%);
- protection from snow, rain, debris;
- obstacle to the destruction of the brickwork of the chimney.
Chimney cap design
- cover or umbrella;
- drip or outlet for water.
A cover or umbrella is designed to protect against atmospheric agents entering the chimney. A drip line or water outlet is designed to remove draining moisture from the top of the pipe, thereby reducing the formation of ice during the winter.
Materials used to make a weather vane
When planning to make a chimney cap with your own hands, you should use materials that are heat-resistant and corrosion-resistant. The specified characteristics have the following materials:
- galvanized iron;
- stainless steel;
- copper.
It is important to remember that chimney caps are located in hard-to-reach places. Based on this, it is necessary to choose a cap that is made of high-quality material and that, according to its characteristics, is resistant to various atmospheric phenomena
One of the most durable is a chimney cap made of copper.
Material for production
Ventilation hoods differ not only in appearance, but also in the material from which they are made:
- Made from plastic, such devices are quite fragile and therefore are rarely found on store shelves;
- Made from metal coated with plastic, such models are more durable and have a rather attractive appearance;
- Made from metal intended for the manufacture of boilers, such devices are expensive, but are highly resistant to burnout from exposure to hot air flows;
- Made from galvanized steel, products made from this metal are considered the most common because they have an affordable price and at the same time have good strength;
- Aluminum, also popular among manufacturers, has good strength and an affordable price.
There are also caps made of copper, but they are too expensive and therefore this metal is practically not used for the manufacture of deflectors.
Area of use
Where exactly can turbo deflectors be used? The products have proven themselves excellent in rooms and facilities where air exchange is extremely necessary. Scope of use:
- For private and apartment buildings. In addition, it should be noted that increased demands are placed on the operation of ventilation ducts in a high-rise building. Often in such houses the quality of ventilation is not the best, since they were made in the Soviet Union. But thanks to the use of a deflector, this problem is solved.
- Turbo deflectors are good for livestock farms and agricultural buildings such as stables, poultry houses, granaries and haylofts. They help ventilation more effectively remove odors, fumes and gases generated when keeping livestock. In addition, the humidity in the room is controlled, it is optimal.
- For processing enterprises. Since the turbo deflector does not require electricity to operate, the savings on the device are corresponding. The exception is enterprises that produce or process substances hazardous to humans.
- Public buildings such as sports complexes, swimming pools, shopping centers and cinemas.
Important! The turbo deflector is also used to ventilate the under-roof space. But how to make turbo ventilation deflectors with your own hands? Let's find out
But how to make turbo ventilation deflectors with your own hands? Let's find out.
The best turbo deflectors
Galvanized metal turbo deflector, D 100 mm
Made in Russia, the model is made of high-quality galvanized steel with a thickness of 0.45 mm, which makes it lightweight. Thus, the blades of the product rotate even with the slightest wind flow, increasing the natural draft in the ventilation tunnels by up to 20%. Due to the use of high-quality materials in manufacturing, the service life reaches 15 years. The design perfectly protects against the entry of natural precipitation and debris into the ventilation.
Galvanized metal turbo deflector, D 100 mm
Advantages:
- appearance;
- works effectively no matter which direction the wind blows;
- long period of operation;
- easy to install;
- works great even in very cold conditions outside;
- additional energy is required to operate.
Flaws:
- the price is high.
Roof deflector/TD-150
The manufacturer of the TD-150 turbo deflector is Russia, the model is used on the roofs of residential premises, factories, garages, basements, toilets, the number of installed hoods depends on the area of the object. The device is ideal as a smoke nozzle for chimney systems. The material used for manufacturing is galvanized or stainless steel. Thanks to the installation of a turbo deflector, the draft of ventilation systems increases up to 20%; to obtain better performance of the device, it is recommended to install ventilation ducts on pipes located slightly at an angle.
Roof deflector/TD-150
Advantages:
- The appearance of the device is quite nice;
- works quietly but efficiently;
- the metal from which it is made;
- increase in traction by 20%;
- good protection of mines from various debris and precipitation.
Flaws:
- small dimensions;
- high price.
Turbo deflector, rotary ventilation turbine, D160, silver, plastic
The ventilation turbo deflector D160 is manufactured in Russia by the manufacturer Nanoturbo deflector.
The material of manufacture is ABS plastic. Its advantageous characteristics are resistance to atmospheric conditions, temperature changes, the possibility of installation even in regions with extreme weather conditions, and UV stabilization. The material is also impact resistant.
The design is quite light, weighing just over 1 kg, while being quite balanced and durable. Special fastenings and numerous stiffening ribs are responsible for the latter.
The device is designed so that moisture does not, under any circumstances, enter the bearings of the device.
The installation diameter of the deflector is 160 mm.
Cost: 2550 rub.
Turbo deflector, rotary ventilation turbine, D160, silver, plastic
Advantages:
- High performance;
- The turbine rotates smoothly;
- The device can be used even in harsh climatic conditions;
- Not afraid of falls or mechanical impact;
- High-quality bearings ensure silent rotation.
Flaws:
- No, unless you compare the strength characteristics of plastic and metal/steel.
Product design
If you plan to make a collet deflector with your own hands, then it would be a good idea to consider its design, that is, install all the individual parts of which it consists:
- Bottom cylinder or pipe. It will be attached to the end of the ventilation system duct or the end of the chimney duct pipe;
- Diffuser. This part is represented by an extended cone that goes from the pipe to the top of the product;
- Branch pipe or shell. This is the external part of the device;
- Cap or top cone. That part that is attached to the top of the entire structure and protects the ventilation or chimney system from precipitation;
- Legs for attaching the cap;
- Brackets for mounting the entire device.
Diagram of the collet deflector
It must be said right away that all these elements are made by hand from galvanized sheet or stainless steel. These materials can be found in sheet form in all construction stores.
Purpose
So, the collet deflector is designed to increase the draft of a chimney or ventilation system. Its operating principle is as follows: it is known from the laws of physics that hotter air is lighter than colder air. If the air is heated from below, then unheated air begins to press on it from above, since its mass is greater, and accordingly, the warm flow rises upward. A conventional chimney system is based on this, that is, smoke, like more heated air, rises upward by gravity. However, it is prevented by colder air, since the chimney is a closed system. So, in order to reduce this cold air pressure, that is, reduce the resistance, a deflector is installed that cuts the air flow, thereby establishing a low-pressure area (a vacuum area) above the chimney or ventilation pipe. This naturally increases cravings.
Tsaga deflector
Increased draft ensures that the efficiency of the underlying device, for example, if we are considering a chimney, it could be a stove, increases by 20 percent. This means that the combustion process will be much better without the use of additional combustible substances.
From all this we can conclude that the collet deflector is intended only to increase thrust. However, there is a special group of such devices. We are talking about rotary products. Their essence is that the central part rotates, which creates even greater rarefaction of the air around, and accordingly, the thrust increases.
Such deflectors also serve for forced ventilation, removal of gases and vapors from the room.
Installation of ventilation deflectors in a private house
Installing the deflector yourself is not difficult. When choosing a deflector, consider not only the size of the ventilation duct opening, but also its shape. If you have a rectangular ventilation pipe, then you need to order an additional transition. Also, during installation, take into account the position of the deflector; it should not be in the wind shadow.
To attach the deflector you will need:
- screwdriver or electric drill;
- silicone sealant;
- self-tapping screws
All joints between the transition and the deflector must be coated with sealant to prevent air flow from the outside. Then all the air that the deflector draws in will come from the ventilation shaft. Next, secure the deflector using metal screws.
Purpose of the device
Any type of ventilation system is designed to control the air condition inside a particular room. One of the conditions for proper operation of engineering communications is the presence of traction. To create the necessary pressure in shafts and channels with natural circulation of air masses, deflectors are installed on ventilation or chimney pipes. These devices help to strengthen the tray due to the wind from outside the building.
The movement of air masses in the direction from the room occurs due to the difference in temperature and pressure in the upper and lower parts of the pipe - the warm flow tends towards the cold one and vice versa. In the summer, the differences become insignificant, which contributes to a noticeable decrease in cravings. Such phenomena are often observed even with a properly designed system, correctly selected diameter and length of the channels. As a result, natural ventilation becomes ineffective. The solution to the problem is to choose one or another deflector for ventilation.
Diagram of the operation of a chimney during rain and strong winds with and without a deflector Source refite.ru
Additionally, the device protects the channel or shaft from such phenomena as:
- clogging with leaves, dust and other debris;
- birds getting caught and stuck;
- flooding and falling asleep with precipitation;
- increasing the efficiency of ventilation systems by an average of 15-20%, the efficiency of heating equipment with chimneys by 20-25%;
- the appearance of reverse draft or the formation of “air jams” due to which combustion products or exhaust air are retained or returned inside the room.
The deflectors installed on the chimney pipes also serve not only as a draft amplifier. Here, sparks are additionally extinguished during heating of the furnace. Many models can be classified as decorative elements.
