How to make a deflector on the chimney with your own hands?

Normal operation of any thermalThe unit requires the presence of a chimney. It is important at the same time to ensure a good draft, which will guarantee the operation of the furnace, boiler or fireplace. Many owners of private houses face a problem that is expressed in poor draft, it can be caused, for example, by a strong wind. To solve such problems today it is customary to use a deflector on the chimney.

The need for a deflector

The described part of the chimney representsa device that is located at the very top of the structure. It can be located at the end of the ventilation duct. If you select the right view, and also the size of this device, you can achieve an increase in the coefficient of efficiency of the equipment by 20%. Among other things, the deflector on the chimney serves as a protection against rain, birds, small animals, debris, dust and snow. The installation of this part of the heat unit is especially effective when it is not possible to equip the smoke channel in such a way that it is straight.

Deflector device

The described components of the chimney of differenttypes, as a rule, have the same structure. Among the constituent parts, it is possible to distinguish an inlet branch pipe, a body, an umbrella, the latter of which has a conical shape. It does not dispense the deflector on the chimney and without the brackets to fix the hood, as well as the outer top cylinder, which is called the diffuser. As a material for manufacturing, galvanized iron sheets are most often used. Recently, the products made of metal coated with a protective layer of plastic or enamel have been widely used. For installation on ventilation ducts where there is no air outlet with increased temperature, it is possible to use deflectors made of plastic.

Defining parameters

Before you start working, you need toto make a calculation. For the basis should take the internal diameter of the chimney, which will determine the width of the diffuser and the height of the deflector. Thus, with a diffuser width of 240 millimeters and a deflector height of 144 millimeters, the inside diameter should be 120 millimeters. With the increase of the first value to 1000 millimeters and the second to 600, the desired value becomes 500 millimeters. As an alternative solution, you can use a ratio that will help to make the correct calculations. Thus, the height of the deflector is 1.6-1.7d, the width of the diffuser should be 1.2-1.3d. At the same time, the umbrella width is equivalent to 1.7-1.9 d. Here, "d" is the inner diameter of the chimney.

Preparation of materials and tools

If you manufacture a deflector onchimney, there is no way to do without roulette, welding machine, electric drill, galvanized iron cloths, as well as metal scissors. Each master probably has a Bulgarian, a set of lockshives, as well as bolts and nuts. It will take a strip of metal.

Manufacturing technology

If you decide to make a deflector on a pipe, thenafter the calculations, you can begin to manufacture the components of the structure. With the help of a pencil, the master should depict the relevant parts, namely the hood, the outer cylinder and the diffuser.

Experts recommend to make a template inby applying cardboard. After this, the workpiece will need to be transferred to the surface of the metal. Using scissors for metal, you need to cut out all the components that were listed above, as well as the cone. Rivets and a welding machine, which can be replaced with small bolts, will allow to connect all the parts together. From the metal strip, you need to prepare the brackets to fix the hood. In order to save material, the metal strip must be cut into thin strips along.

Features of the work

When you make a deflector onpipe, the brackets for fixing the hood should be fixed to the outer surface of the diffuser, which has a cone-shaped shape. To the hood will need to strengthen the cone. After all the details have been fulfilled, the master can begin the assembly manipulations, performing work on the chimney.

Assembling

Below is an example thatinstallation of a deflector on a metal chimney with an internal diameter within 120 millimeters. The lower cylinder must be mounted on the flue pipe using a bolted connection. On the lower cylinder, the clamp should be fixed to the upper one. Brackets allow to fix the cap-umbrella and the reverse case to each other. When the deflector is installed on the chimney with your own hands, it is important to mount the return cone under the hood. This will ensure effective functioning even under conditions that are characterized by a grass-roots wind. In the presence of an impressive diameter chimney, it is necessary to ensure a qualitative fixation. For this, it is customary to use additional stretches, which are made of metal wire.

Additional recommendations

If you will be self-madedeflector chimney, the drawing will guarantee success. Since it determines the design features and dimensions of the future product. Caps are capable of removing combustion products, but it is important not only to properly execute and assemble such a device, but also to install the technology. Proper organization of the removal of soot and smoke is not only a matter of taking care of the environment and heating appliances, but also a very important factor in the safety of tenants. The deflector on the chimney of the gas boiler is not installed. But in all other cases it is important to know about certain provisions. To fix the structure, which has a circular cross-section, you need to use a transition pipe. This is true for gas flues of boilers that have a square or rectangular shape. If there is a chimney of the fireplace or a boiler of too impressive a cross-section, a special foot must be fixed to the deflector. They are a kind of prop, made of steel. The transition from the brick chimney of the boiler or the furnace to the circular cross-section of the deflector is performed only after the brickwork has been laid. It is forbidden to install deflectors on the chimneys, which are part of the gas boiler. This prohibition applies to the installation of the deflector on the flue gas ducts of the boilers, which operate at the expense of gas, and is regulated by SNiP 2.04.05.

Conclusion

Air duct deflector for heating equipmentacts as a sufficiently important element of the system. If there is a need to increase the thrust in the channel, which is part of the furnaces and boilers, then the described design is absolutely indispensable. An effective device designed to improve the functioning of the heater is permissible not only to produce, but also to be installed in the future without the help of professionals. It is important to remember the prohibitions, and also that, not having enough experience, it is preferable to purchase the described device in the store of the corresponding goods.