Chimney deflector: 2 main types of devices

The normal operation of your furnace will not be possible without a good thrust implying adequate air intake and the correct output of gases. All this provides a qualified designed and qualitatively made chimney. However, there are a number of factors substantially deteriorating traction and reduced furnace efficiency. These are atmospheric precipitation, strong wind, and trash that clog the chimney and impede its normal operation. Chimney, begins to greatly smoke.

Consider how the deflector works on the chimney pipe

The presence of a good chimney contributing to the stable and natural output of combustion products is an important condition for the operation of the heat generator operating without chance. If there is no such device, you should use a smoke pipe deflector. This device creates an obstacle on the path of the air flow formed by the impact of the wind.

Such a simple, but effective structure, like a deflector, perfectly protects the chimney against winds, precipitation and garbage. Its functions can still be attributed to a good removal of smoke from the pipe.


According to experts, after installing the deflector, the efficiency of the heating device becomes higher by 15-20%. However, this device will only act when the chimney is installed without errors and flaws. Its height should be sufficient, and the cross section is competently selected. An important value is the location of the pipe on the roof.

Principle of work of the deflector for chimney:

  • The wall of the upper cylinder prevents airflows, which when a collision with it is simply supplied;
  • Some of the air coming from the overall jet is rapidly raising the topping up and finds smoke out of the chimney;
  • Intensively moving in the pipe smoke, sucking with outer air, after that, it becomes much more productive, and increases the thrust.
  • Regardless of where the air flows are directed to the deflector, the necessary thrust in the heating device will be a good quality.

In the upper cylinder there are gaps, through which air suction occurs. However, at the same time, under the wind, the air flows can form certain twists under the cap of the deflector, which will slow down and prevent the exit of smoke from the chimney. This disadvantage, unfortunately, is inherent in all deflectors. But many solve it by installing under the umbrella of the cones upside down cone. Such a simple adaptation will lead to reflection, dissection and withdrawal from the chimney of air masses mixed with smoke.

Simple deflector on the pipe with your own hands: Calculation and drawings

If your chimney is not fully equipped, and from time to time you see that there are problems with the withdrawal of combustion waste, you can try to solve this problem in two ways: buy a finished deflector corresponding to the parameter of your chimney pipe, or make a homemade device.

If you have chosen the second option to solve the problem, then it is necessary to create a drawing of the deflector, which you will wear on the chimney. Without this type of design, it is impossible to be taken. The design scheme must be present.


Only after you carefully measure all the parameters and make a competent drawing of the device, you can move to practical actions. In addition, before making a chimney deflector, it is necessary to prepare some materials and tools.

For the manufacture of a deflector will be needed:

  • The cloth of stainless steel, the size of 0.5-1 m. If there is no stainless, then galvanized, although it will last less.
  • Scissors for metal;
  • Riveter;
  • Drill;
  • Dense cardboard;
  • Drill;

First, all the details, strictly in size, are drawn on the cardboard in a natural value, and then cut out. Paper elements are assembled as they must be in the finished product. If everything is assembled correctly, then all the same actions can be done with a sheet of metal. To do this, paper elements are laid on the metal and supply the marker. Then cut out all the details with scissors. In places of cutting, metal pieces need to be adjusted with pliers and catch up with a hammer. The diffuser is made from a piece of metal, cylinder. In the edges drill holes, edges are fastened with rivets, bolts, welding to the choice. Similarly, we make an external cylinder. Thus, we make a cap made of metal cone. In the next stage of the sheet, we cut 3-4 strips, in length about 20 cm, the width should be about 6 cm. The sides are sweep and disable with a hammer. In the cap at 5 cm from the edge we drill bolt holes. Strips will be attached to the cap and bend them in the form of the letter P. Scheps umbrella we connect to the diffuser. At the final stage, the resulting design insert into the outer cylinder.

How to make your hands the grigorovich deflector

Among devices for chimneys should be mentioned by the grigorovich deflector. This design allows you to increase the craving by 20% and increase energy efficiency.


If you collect the grigorovich deflector, then you need to add the device with a reverse cone. Then the protective umbrella is done in diameter more than such a cone by 3-4 cm. Having made both parts, it is necessary to lower in the larger and gently into the marker. After that, on a larger cone, we make cuts to the conducted line, as a result of which we obtain about 8 strips located at the same distance. Strips bend inside. With their help, our reverse cone is securely fixed in a protective umbrella without welding. When using this reverse cone, the attachment of the umbrella to the diffuser is better to produce with spills.

The resulting structure will be highly reliable, it is not afraid of strong busting winds and serves you for a long time.

The chimney deflector consists of:

  • Inlet nozzle;
  • Hull;
  • Diffuser;
  • Umbrella (volley);
  • Brackets.

To install such a deflector on the chimney, you need to drill 3 holes exactly at the same level. The device is inserted into the pipe and secure bolts. Then we collect on the axis the bearing, a protective cap, a socket, a cylinder and a canvas of the fluger. Brepping all among themselves rivets. In order for the deflector and the fluger to function normally, it is necessary to follow the state of their bearing. It needs to be well lubricated, otherwise the rotation will be difficult. Make sure that in winter it was not icing design.

Practical deflector on the chimney of the gas boiler

A channel must be included in the heating system, to remove smoke from the furnace. The task of this device is the leading of harmful burning products. Its good functioning affects the operation of heating equipment.


It is very important to ensure that the system is good. If this does not adhere to this, the design will not work normally. The wind will blow the boiler, and the room will cool.

When the strong gusts of the wind blown the flame of the burner, the gas boiler sweeps. In order for this not happened, it is necessary to take appropriate measures - to establish a smoke deflector.

What do you need a chimney deflector:

  • Protects the chimney channels from atmospheric precipitation;
  • Will save garbage from entering the boiler;
  • Tightened from strong wind gusts;
  • Improve the boiler.

Externally, the deflector looks like a cap, skiing on a smoke exhaust pipe. This design should be made with extension. It will help protect the boiler from strangling. In some cases, where strong wind gusts are often used, the n-shaped deflector is used.

What is a chimney deflector (video)

The deflector is a device installed in the headband of the smoke tube. The task of this device is to improve the thrust and protection against garbage and precipitation. The deflector for chimney can be divided into several varieties. This product is flat, or has the form of a semicircle, which opens the lid.

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