Do-it-yourself hood over the barbecue in the gazebo: how to make a chimney from metal or brick, distance and height, materials and tools

Cooking meat, fish and vegetables on the grill is a traditional, pleasant, festive affair, but it has its drawbacks. The process is sometimes interrupted by bad weather, and the smoke wafting through the yard creates some discomfort for those around. To make grilling barbecue a pleasure, use a barbecue umbrella. The element is installed above the firebox and serves as a smoke exhaust.

Functions and advantages of a homemade hood

Many summer residents mistakenly believe that a hood over a barbecue is needed solely to remove smoke from the gazebo and make people feel comfortable in it.

• However, this product also performs a number of other important functions:
• controls the strength of the fire in the grill;
• prevents the appearance of soot;
• prevents the negative influence of wind and fire extinguishing;
• gives the barbecue a complete, more attractive appearance.

Did you know? According to archaeological data, the first gazebos served as protection from the sun 20 thousand years ago, and they were built on the territory of Ancient Egypt. Large monumental structures of this type appeared a little later in Ancient Greece and Rome, where they were decorated with expensive marble and granite.

With the presence of a hood, you don’t have to worry about accidental fire of objects in the gazebo, and there will be much less cleaning work (soot will not settle on the floor and objects located next to the grill). Among other advantages of using such a device, there is also an increased speed of igniting the coals (provided by the presence of directional draft), so you do not have to wait too long for the selected dishes to be cooked.

There are a variety of models of exhaust systems for gazebos on the modern market, but homemade designs have a number of advantages over them.

You will be interested in learning how to make a landscape design for a country house with your own hands.

First of all this:

1. More affordable cost of construction. The average price of a finished smoke collector varies between 12–20 thousand rubles, and creating a structure with your own hands will cost an average of 5,000 rubles.
2. The ability to take into account the individual characteristics and wishes of the owners. Gazebos with barbecues can well be called objects of homestead creativity, which means that the hood should fit harmoniously into the overall picture, taking into account the size of the hearth and the design idea when decorating the entire recreation area. Of course, doing the work yourself is fraught with certain difficulties, because special knowledge and skills are required, but most often, with moderate financial costs, it is possible to achieve a worthwhile, exclusive result.

Interior decoration

The design of gazebos with barbecues is a matter of taste and capabilities of each owner. There are several recommendations, if followed, your barbecue corner will become a favorite place for the whole family and will decorate the area.

You need to start arranging the design of a gazebo with the idea of ​​the structure itself; it should be harmoniously placed on the site.

The gazebo must be positioned correctly. To do this, choose the most beautiful and quiet corner in the garden, away from prying eyes. This will allow its visitors to relax and unwind. The landscape and the summer kitchen should be combined with each other.

If we talk about the interior, then everything is more complicated here. The space inside should be beautiful, safe and functional at the same time.

When decorating a gazebo, the scope of imagination is unlimited. This is a great way to use up things you may have stashed away in the attic. For example, a horn on the walls or an old samovar can become interesting interior elements. Anything can become a beautiful element: curtains, forks hung on the wall near the barbecue, spatulas and grippers for meat, jars of seasonings, flowers on the table.

An important element of any interior is lighting. The cooking area should be illuminated as brightly as possible, while soft, subdued light is suitable for the relaxation area. It's good if the light level is adjustable.

Design of the food preparation area. The key element of this area is the stove. Depending on the size of the gazebo itself, the content of this zone will be different. For a small gazebo, it is possible to install a small table with a hand washbasin. The countertop material should be easy to clean and durable. It’s convenient if there is a small shelf next to the grill where you can put seasonings and the most necessary utensils.

If space allows, you can make a sun lounger in the gazebo or hang a hammock in a secluded corner. The space next to the gazebo is equipped as much as possible. For example, you can pave the area under an additional canopy in case the planned number of guests increases. You can install a large garden swing with a roof, which will become a favorite place for children and adults. For children, you can also arrange a sandbox or soft area for active games. Here the owner’s imagination can be unlimited.

The material of the gazebo itself can help create comfort. Here the undisputed leader will be the tree. As a complement to it, mats made of straw or other natural materials can be used. In a closed gazebo, you can use any type of textile: large interior chair cushions, soft bedspreads. It should be noted that the comfort of the gazebo is influenced by the size of the gazebo - the smaller it is, the more comfortable a person will be in it, as a rule.

All materials must be suitable for outdoor use or treated as such. They should also all be easy to clean, since staying in the gazebo involves eating.

The most common and pleasing to the eye is the use of natural colors in a natural range. The gazebo should not be conspicuous by its brightness or pretentiousness - this will quickly get boring.

The design style of the gazebo is often chosen based on the preferences of the owners or what is at hand. The Asian style involves complex flattened roofs with several floor levels inside. Country style is well suited for wooden buildings. The English style with forged elements will appeal to lovers of elegance and sophistication.

When deciding on the design idea for the entire gazebo and its interior in particular, one must not forget that this is an auxiliary structure, and the extra costs and difficulties during its construction are not necessary in all cases. And often they can turn out to be unnecessary and superfluous and only complicate the stay inside and the cooking process itself, which is the main one.

Features and Benefits

Many people don’t just install a barbecue, but equip a summer gazebo underneath it, where they can cook kebabs or barbecue and sit with friends. It is for this design that a hood is required. It’s scary to imagine how much burning and smoke appears indoors as a result of cooking meat on the grill. Without a hood, all this will settle on the ceiling of the gazebo. After the first preparation, the ceiling will have to be thoroughly washed, and in the future the situation will only get worse. The presence of a chimney or hood will allow you to quickly remove all smoke and remove it from the room.

The hood has a lot of advantages

Homemade hoods have a number of undeniable advantages over purchased ones:

1. Price. Making such a design yourself will be much less expensive than purchasing it in a store. Ready-made hoods cost approximately 12–20 thousand rubles, and by doing it yourself, you will save a decent amount of money.
2. Design. In stores you can purchase hoods that are suitable only for a certain type of gazebo or barbecue. A homemade hood will match exactly your type of barbecue.

There are several types of hoods based on their shape:

1. Wall-mounted. This type has a more elongated shape. They are well disguised and do not affect the overall interior design.
2. Ostrovnaya. They are wider than wall ones and are also located in a visible place. Therefore, island hoods should look more attractive than their wall-mounted counterparts.

Application

A brazier is an open brazier. The smoke rises and passes through the meat, making it even tastier. But then I would like to remove the smoke somewhere. And if this is tolerable in the fresh air, then in the gazebo the smoke creates a problem, and indoors it makes using the barbecue completely impossible. A chimney is needed. Extraction of smoke and fumes.

Whether you purchase a factory model or make it yourself, be sure to make sure that your hood can be cleaned of soot.

DIY metal version

The metal structure is an exhaust hood, the principle of operation of which is extremely simple. It collects combustion products and removes them from the room through a pipe. Such an umbrella must be very smooth, since any roughness reduces its effectiveness. If you prefer a metal umbrella, you must also provide it with a wide opening.

To make it you will need a sheet of steel, angles (made of metal), a riveter, rivets, screws, a welding machine, a grinder and a drill.

Now as for how to do it:

1. The first step is to create a drawing and put on it all the dimensions according to which the hood will be designed.
2. Now we make the frame. First, blanks of the required length are cut from metal corners. We alternately weld the lower and upper parts of the frame, and then connect them into one structure.
3. The frame of the exhaust pipe itself is assembled from the corners.
4. Treat the seams left after welding. They are polished using a disc and coated on top with a special varnish to prevent metal corrosion.
5. Let's start covering the finished frame. We cut out the metal sheets and make bends, having previously laid the sheets on the workbench.
6. We use a drill and make mounting holes to securely fasten the casing.
7. Finally, a riveter will help cover the frame with sheets of metal.
8. The final touch is the application of an anti-corrosion coating, which increases the service life of your structure.

Many people are interested in how such a hood is attached. This can be done either using racks or using hangers. The first ones are made of brick or iron. You can also add an interesting iron element - massive chains on which the hood will be attached.

Use in an apartment

There are often situations when you want to go to nature, but there is neither time nor a summer house to go to. In this case, it is permissible to use barbecues in apartments and on balconies, but only with significant restrictions.

So, the main problem is not even the smoke and foreign odors in the room, but the neighbors. Therefore, it is best to install the grill on the balcony. If it is open, then natural ventilation will avoid the need to install an exhaust system, otherwise you just need to worry about ventilation in advance.

A barbecue on a balcony is not such a rare occurrence. If you think through the ventilation system in detail, then such a device can be used at any time if desired. In particular, the most suitable option would be a metal exhaust hood installed above the grill itself. Such umbrellas are freely available for sale, and therefore purchasing them will not be a problem for anyone.

The problem is different - the grill is on the balcony, which means that if a standard design is used, smoke and odors will be drawn upward. Just in this case, it would be useful to attach several metal sheets to the outlet of the umbrella with your own hands or with the help of a knowledgeable person. This structure must be bent in such a way as to ensure that all combustion products are discharged to the street outside the balcony.

You can also install a barbecue in the apartment under the hood. To do this, simply install a standard exhaust system in the wall above the barbecue, which is usually installed above kitchen stoves. In this case, it is generally possible to use the grill at any time of the year and even at any time of the day.

Thus, a home grill is not a problem today in effectively extracting excess gases and odors from the apartment.

Components

Any barbecue hood consists of an umbrella and a chimney. It is recommended to add a grease trap and a smoke exhauster (an electric fan that creates draft). The most common design is a metal hanging umbrella and chimney. It provides complete freedom behind the grill and is quite cheap. Where the barbecue is located against a wall or a heavy material is selected (for example: brick), the umbrella rests on 1, 2 or 3 walls. In the latter version, the grill is very similar to a fireplace.

Umbrella

An exhaust hood is needed to collect the air above the barbecue with smoke, grease and soot. The most affordable material for an umbrella is sheet metal. The weight will be light.

A metal umbrella can become very hot. Be careful.

If the umbrella is made of brick or rubble, the inner surface should be without ledges and smoothly converge towards the chimney. The distance from the bottom of the hood to the roasting pan must be at least 75 cm.

A 5 cm flange along the bottom of the umbrella increases the efficiency of the hood: it pulls from under the umbrella, and not from all sides.

For reliable suction of gases, a hood with forced smoke exhaust is recommended to increase the area of ​​the fryer by 20-30%.

A natural draft hood is demanding on the height of the pipe, the area of ​​the channel and the size of the umbrella. The latter can exceed the size of the fryer by 5-8 times. For this reason, we do not recommend the passive traction option and are not considering it.

Chimney section

SP 7.13130.2013 5.8. The cross-section of chimneys (smoke channels) made of clay bricks or heat-resistant concrete, depending on the thermal power of the furnace, should be no less than: 140 x 140 mm - with a thermal power of the furnace of up to 3.5 kW; 140 x 200 mm - with a thermal power of the furnace from 3.5 to 5.2 kW; 140 x 270 mm - with a heat output of the oven from 5.2 to 7 kW.

For a barbecue with a thermal power of 15 kW, you need a chimney with natural draft, a cross-sectional area of ​​0.081 m2. Which means the dimensions for a square chimney are at least 285 x 285 mm, for a round one - a diameter of at least 321 mm.

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For a hood over a barbecue with forced smoke exhaust, the cross-section of the chimney must be no less than the hydraulic diameter (D) which we determined in the calculations and no less than according to SP 7.13130.2013 P 5.8.

Floor passage

Thin-walled iron or asbestos-cement pipes are highly heated by combustion products and require special heat-insulating layers to pass through the floors and roofs.

Brick pipes form thickenings in the same places, which reduces the temperature on their outer surface below critical.

The passage of floors and roofs for a chimney made of special sandwich pipes does not require any additional unit. We recommend sandwich pipes for the chimney. This is a convenient compromise between price, labor intensity and safety.

The height of the chimney, according to fire safety rules, should not be lower than indicated in the photo.

The height of the chimney above the roof and relative to neighboring buildings

Fan (smoke exhaust)

An exhaust fan above the barbecue is required: without it, it is almost impossible to organize the necessary draft. Not just any fan is suitable for hoods; they are also called duct fans. Need a high temperature or heat resistant fan.

What you need to pay attention to:

• Performance - the fan must provide a thrust no less than the calculated one;
• Heat resistance - requires a high-temperature fan;
• There is a seat for round and rectangular ducts; the size should fit the cross-section of your chimney.

There are axial fans and centrifugal fans. Axial ones are more compact, but louder than centrifugal ones.

The fan is installed outdoors with a barbecue. This is due to the noise from its operation and the fact that the exhaust gases need to cool.

Spark arrestor

SP 7.13130.2013 5.13. Chimneys for wood and peat stoves on buildings with roofs made of combustible materials should be equipped with spark arresters made of metal mesh with holes measuring no more than 5 x 5 mm and no less than 1 x 1 mm.

In our case, this is mandatory. No matter what kind of roof a gazebo with a barbecue or a summer kitchen has: the areas are small, and there will definitely be some kind of building nearby, dangerously close.

In addition to mesh spark arresters (spark arresters), there are designs in the form of a deflector:

Grease trap

A grease filter for the hood above the barbecue is an important and highly recommended addition. The grease trap protects the insides of the hood from grease, which means that soot and resins from the smoke will not stick to the grease film.

The presence of a grease trap will not completely protect against soot deposition on internal surfaces, but it will greatly reduce such deposits.

A grease trap is usually several layers of perforated aluminum or sheet metal or a complex labyrinth structure for professional hoods. Gas with a fat suspension, entering such a filter, settles in it. The grease trap is periodically washed using household anti-grease chemicals or dishwashing detergent.

Fungus, deflector

SP 7.13130.2013 5.12. The mouths of chimneys should be protected from precipitation. Umbrellas, deflectors and other attachments on chimneys should not interfere with the free exit of smoke.

There are a lot of deflector options. There are options for combining a spark arrester and a deflector. There are even those that increase thrust if there is wind, but the increase in thrust is small and in our case is not of interest. Less resistance (if such a parameter is specified) and appearance are the 2 main selection criteria.

Problems that may arise during the process

There are no products that are completely perfect - everything has flaws. This raises several problems, which we will consider below:

The biggest problem is if the smoke does not go into the hood, but diverges to the sides. This only happens if you have not made sure that the ventilation is equipped with a fan. They are usually electric and can be turned on as soon as you start working on the grill. Although, as a rule, smoke can remain in the room also because it simply did not have time to heat up and its density is the same as the density of air. Therefore, as soon as the smoke heats up, it will be able to rise up on its own and exit through the ventilation pipe to the outside. The cross-section of the chimney is about 25-27 cm. What will happen if this is not so? Nothing special, the smoke just won’t be able to be fully absorbed

By the way, it is also very important that the pipe has a diameter of about 16 cm. Also do not forget that the height of the pipe must be at least 3 meters from the ground. This is the only way the smoke will come out completely and dissipate.

The rest is simple. Assemble the exhaust hood as indicated in the drawing above and weld it to the pipe. Afterwards, simply attach the product in the right place.

Of course, you can also build a brick hood, but, firstly, it is only suitable for brick barbecues, and, secondly, this design is much more complicated.

Hood for barbecue. Tools and materials.

• Iron sheet 3 mm.
• Metal corners 20x20x3 mm.
• Rivets, screws, heat-resistant paint.
• Angle grinder (grinder) with discs for cutting metal.
• Welding machine, electrodes, mask.
• Drill with attachments for concrete.
• Riveter.

The umbrella consists of a frame made of metal corners, sheathed with metal. The height of the umbrella is 2 m, it will be installed on a grill measuring 105x60 cm.

The umbrella consists of three parts: the base, which is attached to the grill; domes with internal bridge to improve traction and pipes.

How to make it yourself?

A metal hood has the following advantages:

• light weight;
• it is possible to install additional options;
• low price;
• simplicity of design;
• ease of installation.

Brickwork has an undeniable advantage: such a structure can stand for a thousand years without visible damage.

After all, it has a detrimental effect on the quality of prepared dishes and the operation of the air duct itself. Traction will sooner or later decrease due to accumulated dirt, so it is best to do preventive cleaning.

It is important to decide at the very beginning which type of exhaust device is preferable. The materials needed to create a metal hood are simple:

The materials needed to create a metal hood are simple:

• iron sheets 1–3 mm;
• corners with a section of 30 x 30 x 30 mm;
• bolts;
• thermal primer.

The height of the umbrella can reach 2 meters, the optimal size of the barbecue is 110 x 65 cm. The umbrella is composed of three units: a base, a dome with internal fastening and a pipe.

It’s not difficult to make a barbecue hood with your own hands. First, markings are made on a sheet of metal with a marker, which corresponds to the previously drawn sketches. Then, using a grinder, the necessary components are cut out, the parts are assembled and the joints are welded.

Brick hood has its own characteristics. It is created from special bricks (fireclay) mixed with clay and sand. The clay must be of a certain grade and soaked in water for 48 hours. In a brick hood, a special frame is made on which the brick is placed. In this case, the material must be treated with special fire-resistant enamel.

This is followed by brick laying. The base, that is, the first rad, is laid with the pushing side of the brick, the shortest. A typical smoke collector consists of 9–11 rows. The masonry is made in such a way that it tapers, that is, the displacement occurs about 16 mm at each level, at the end part 35 mm. Then a square-shaped pipe is laid from brick.

At the top, the pipe has a cross-section of 265–265 mm. This figure was obtained empirically; it is optimal for the operation of the retractor, while the height of the pipe is about 3 meters.

It is important to wait at least 3-4 weeks after finishing the masonry to allow the structure to settle for greater strength. There is no rush to use a “raw” structure

This can lead to deformation and cracking of the material.

The surface is covered with a special primer, which will protect it from exposure to high temperatures. As you can see, technologically there is nothing overly complicated in such work; masonry can be done by a person with minimal construction skills.

When working, be sure to use safety glasses and gloves.

How to make a barbecue hood with your own hands.

Before starting work, measure your grill; if your dimensions differ, then you need to adjust the dimensions of the hood.

Before work, new metal corners must be cleaned from factory grease with a clean rag. We use a grinder to cut metal corners (dimensions for each part of the grill are in the drawings below). To avoid metal shavings when cutting metal, be sure to wear safety glasses.

1. We weld 2 sides of the hood base from metal corners:
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2. Then we weld the corners to them for the back surface of the grill base:
3. Assembling the lower part of the dome of the exhaust hood for the barbecue:

4. We weld the corners of the back of the barbecue dome onto it:
5. Assembling the side parts of the barbecue hood dome:
6. Assembling the pipe:

7. After welding, we process the seams of the hood with a grinding disc. In order to protect the metal, we treat the frame with heat-resistant paint.
8. We mark the metal for covering the exhaust hood:

9. We bend the edges and fold lines, securing the sheet to the edge of the workbench:

10. We cover the base of the hood with metal using rivets and an installation tool (rivet gun):

11. Before covering the hood dome, we add a metal plate diagonally inside, which will help improve draft. This plate is a metal sheet measuring 99x34 cm with 2 cm edges on the edges, to which it is attached to the bottom of the dome.
12. We mark and cut out the metal for lining the hood dome:
13. We cover the pipe of the exhaust hood for the barbecue:

14. We paint the grill hood with thermal paint.
15. We install the base on the grill, securing it to the brick with self-tapping screws for concrete (brick).
16. We install the dome, securing it with rivets to the edge of the base.
17. We install the pipe, putting it on the dome, using rivets for fastening.

Why build a chimney

Many lazy people do not see the point in arranging a chimney for barbecue in a summer gazebo. They count on the wind to blow the smoke out from under the canopy, but in reality this does not happen. As soon as you start frying the meat, the entire gazebo is covered with clouds of smoke, and if there is a hood, it is removed outside.

If this is not done, then after using the barbecue, a layer of soot and soot will settle on the ceiling, which is extremely difficult to clean off. If you frequently fry meat on a grill like this, the kebab will be seasoned with soot falling off on top.

In addition, a hearth with an open flame that is not equipped with an exhaust hood poses a fire hazard.

Barbecue hood: design options

You can modify the basic version of the hood by making other hood options. Often the base is laid out of brick, and then a dome with a pipe is installed on it.

The pipe can be either finished metal or brick.

In addition, instead of a U-shaped base, you can make a corner one: Exhaust hoods made of brick are made according to the same principle - a metal frame is welded, which is lined with refractory bricks.

In addition to brick, the hood is often decorated with wild stone.

A barbecue hood can also be decorated with wood - a metal exhaust hood is lined with wood using thermal insulating gaskets.

A DIY barbecue hood will create more comfort for you, eliminating annoying smoke in your eyes when cooking and leaving the aroma of an open fire for ready-made dishes.

If you are just starting to think about how to make a barbecue yourself, you will be interested in our article Do you want to make a barbecue with your own hands: 25 photos and drawings

Features of brick construction

The basis of the dome is an iron frame welded from a strong corner. Before laying, it is treated with a primer and painted for better protection. Since the temperature directly above the firebox is quite high, the smoke collector is made of refractory bricks. The shape of the structure is stepped, tapering.

Tip: file protruding welds in a metal frame so you don’t have to trim the bricks in the masonry.

The chimney is made of both fireclay and stove bricks. If the barbecue is located in an open area, drainage slopes are made of heat-resistant roofing material on the walls of the smoke collector. Then, during precipitation, moisture will not destroy the building structure. The umbrella over the chimney is metal.

Selection of materials

It is recommended to mount a metal hood strictly in the center so that it hangs over the equipment. The pipe is covered with a visor to prevent moisture from entering. The material commonly used is copper or stainless steel, which resist corrosion best. Such materials can be used for a long period of time.

A metal hood is the most acceptable option; it is relatively inexpensive and has excellent performance characteristics.

Red or fireclay bricks are also used for hood, which have no less good technical characteristics. The mortar used for masonry is made in proportions of 1: 3, where 1 is cement of a grade of at least 400, and 3 shares are sifted sand.

Accessories

The following components are required to create a hood for a large barbecue:

• pipe;
• spark arrester;
• grease trap;
• fan with motor.

All components are collected from different sources. A brazier fan can be purchased at a store; a spark arrester and a grease trap can be easily made from a metal sheet. The most important element is the pipe, which must correspond to the operating power of the device. If the cross-section is too small, combustion products will enter the room, which is extremely undesirable. Before creating a hood, you need to make a detailed drawing and carry out careful calculations.

Construction of drawings

A correctly drawn up drawing is a guarantee of flawless operation of the device for many years. The cross-section of the pipe and the weight of the barbecue are the main parameters that must be taken into account when developing the plan diagram. You should start drawing a drawing with a sketch and drawing the basic dimensions of the barbecue. Based on these numbers, it will be possible to further calculate and draw the hood. A correctly drawn up drawing will also allow you to calculate the amount of material required. Avoid overspending.

Assembly Instructions

• First, the dome is assembled. Then the pipe is assembled and secured.
• After completing the welding work, the seams are processed with a grinder. The finished surface is coated with a fire-resistant anti-corrosion primer.

• Then you should mark the metal that will be used to cover the exhaust hood. Sheets are bent at the corner of the workbench. The metal is attached to the base using rivets and bolts;
• It is recommended to place a metal plate (size 98 x 35 cm) diagonally into the dome, which will help improve traction. The distance from the edge should be about 1.5 cm; the plate will be attached to these edges.
• The base is mounted on the grill using anchors or special screws. Afterwards the dome is installed and the pipe is secured with rivets.

The pipe can also be made of brick, but in this case it will weigh much more.

It will require a massive, solid foundation to avoid deformation or distortion during operation. Exhaust hoods made of bricks are created according to a simple principle: a metal frame is welded, which is lined with fire-resistant material.

Often the hood can be decorated with wild stone. A metal umbrella can also be covered with wooden panels; There must be a thermal gasket between the panels and the metal.

Possible alternatives

Without breaking the law, you can cook barbecue on the balcony using two heat sources - electricity and gas. Moreover, it is highly advisable to purchase devices made by reputable manufacturers. They pay great attention to safety, so the risk of fire is negligible. But even these devices should not be left unattended.

Electric grill

An electric substitute for a classic barbecue can be:

• horizontal;
• vertical.

Horizontal models are more like regular barbecues. Even skewers with meat in them have to be rotated manually. Vertical devices have the form of an elongated cylinder. In addition to heating elements, they also have drives for rotating the skewers.

An electric grill for a balcony is the safest option. And since there are no prohibitions on its use even in enclosed spaces, no one will be able to make claims against you.

Stationary devices

A stationary barbecue is a massive structure equipped with:

• ventilation holes;
• lid;
• dust collector;
• grill grate, etc.

Such a stove has an impressive and prestigious appearance. But installing a stationary barbecue on the balcony will almost completely deprive it of free space.

Portable devices

Mobile structures for balconies are made using handicraft methods. They are small collapsible boxes. Many models are equipped with hooks for hanging on a balcony parapet.

The design features of portable barbecues are as follows: they can be quickly disassembled and stored away from prying eyes. But according to the law, you still cannot use it on the balcony: even in the smallest drawer there will be an open fire - an obvious source of danger.

Gas grill

This device consists of:

1. A metal grate that acts as a cooking surface.
2. Burner.
3. Regulator, hoses.

All components of the device are enclosed in a housing. The structure is covered with a lid that helps retain heat inside the grill.

It is impractical to install a stationary gas pipe on the balcony, and no one will give permission for this. There is only one option left - a gas cylinder. It is connected to the gas supply regulators using hoses.

Air fryer

The kitchen unit, which looks like a transparent pan with a lid, is equipped with a heating element and a fan. The lid has a large number of holes. Through them, air masses enter the air fryer. The air rising after heating warms up the food. The fan ensures uniform cooking.

Hood calculation

Thermal power of the fryer.

It is generally accepted that 1 kg of shish kebab requires 0.75-1 kg of coal. For 1 person you need 400-700 grams of meat. The specific heat of combustion of charcoal is 7.5 kW.

And we get for 6 guests we need a grill with thermal power: minimum 0.4*6*0.75*7.5 = 13.5 kW maximum 0.7*6*1*7.5 = 31 kW.

Usually, a large amount of meat is fried on the grill in several batches. For further calculations, we will use a “round number” of power of 15 kW.

Fryer area.

D=2*A*B/(A+B)

Where: A – width of the brazier, m; B – length of the brazier, m.

D = 2*0.4*0.6/(0.4+0.6) = 0.48 m

Share of convective heat releases.

Qk=QT*KЯ*KK

Where: QT – thermal power of the barbecue or hearth, kW; KYa is the fraction of sensible heat released from the fryer, the value is taken to be 250 W/kW; KK – fractional part of convective heat releases in relation to sensible heat releases of the fryer, the value is taken to be 0.5.

Qk = 15*250*0.5 = 1875 W

Convective air flow.

Lki=k*Qk1/3*(z+1.7*D)5/3*r

Where: k – coefficient equal to 5·10-3; Qk is the calculated fraction of convective heat release from the fryer, W. z – distance from the grill to the exhaust hood, m, cannot be less than 0.75 m; D – fryer area; r – correction factor for placement conditions: between 3 walls - 0.75, against a wall - 0.8, free or island - 1.1;

Let's calculate for a hood with access to the barbecue from all sides and a minimum height from the barbecue to the hood hood.

Lki = 5·10-3*18751/3*(0.75+1.7*0.48)5/3*1.1 = 0.224 m3

Volumetric gas flow rate for combustion products.

Lri=1.51·10-7*QT

Lri = 1.51·10-7*15 = 2.26·10-6 m3

Gas consumption in the hood.

Lo=Lki+Lri

Where: Lki is the value of air flow from the convective flow rising above the slab, m3/s; Lri – data on the volumetric flow rate of natural gas combustion products in the stove burners, m3/s.

Lo = 224·10-3 + 2.26·10-6 = 0.224 m3/s

Consumption per hour.

(D)/L=Lo*3600*D

(D)/L = 0.224*3600*0.48 = 421.63 m3/h

Brick construction

If your grill is made of brick, then the hood, as a rule, is made of brick. This is necessary to give the overall design an aesthetic appearance. Of course, building a hood from brick is more difficult than from metal, but you can try. First, let's decide on the tools. You will need fire bricks, sand, clay, metal angles, screws, a welding machine, a trowel and a drill.

Next, adhere to the following algorithm of actions:

1. Let's mix the solution. To do this, sand and clay must be thoroughly mixed in a suitable container in a ratio of 3:7. Mix this solution with water.
2. Now let's start laying the support. Stands of the required height are laid out of bricks, directly above the barbecue.
3. By analogy with the previous instructions, we make a frame from corners. First, the workpieces are cut, the upper and lower parts are welded separately, and then welded to each other. A frame is also made for the exhaust pipe.
4. Let's start with the lining. Using screws and a drill, the frame is mounted on a support.
5. After this, the frame is covered with brick, and each subsequent row is shifted by 17 mm. The topmost row of the umbrella must have an internal cross-section of at least 26x26 cm.
6. The final touch is to lay out the exhaust pipe.

A barbecue hood can be made from bricks

The main nuance of this type of structure is its enormous weight. Therefore, make sure that the fastenings are secure and hold it.

Building your own version

To successfully complete the entire project you will need the following hood components:

• sheet metal;
• corners with dimensions 25×25×2 mm;
• rivets and screws;
• fire resistant paint;
• welding machine;
• Bulgarian;
• drill;
• riveter

The first step is to assemble the frame of the hood in order to subsequently sheathe it with metal. The dimensions of the product will depend on the size of the grill used. In total, you will need to make three parts of the frame:

• base;
• dome;
• transition to pipe.

The base is necessary so that the entire structure rests on the grill or covers the side walls from gusts of wind. It is necessary to take measurements of the grill using a tape measure in order to select the correct size of the hood. The next step is to prepare the corner for processing. To do this, it is cleaned of rust or washed of factory preservative lubricant. The next step is cutting blanks for the hood from a metal corner.

The first module to be manufactured is the base. Its basis is a rectangle. Its smaller side is equal to the height of the base, and its larger side is equal to the length of the barbecue. It’s good if the ends of the blanks of this triangle have an angle of 45 degrees. After this, they are laid out on a flat surface and tack welded together into a common structure. After tacking, it is necessary to check the corners and fully weld the seams. When the rectangle is ready, the side walls can be welded to it. Their height is equal to the height of the rectangle, and their width is equal to the depth of the barbecue. The result should be a box without one of the walls.

The next module to be assembled is the base of the hood dome. It is assembled according to the model of the previous product, only it contains all the walls and its height is slightly less than that of the supporting base. An example can be seen in the illustration above. Now you need to make the base of the adapter for the pipe. It is a small square. It is also assembled by welding from a metal corner, as shown in the illustration below.

When it is ready, you can proceed to fixing the jumpers, which will be at an angle. The desired height of the hood is measured and the workpieces are cut. After this, they are welded with one side to the base of the hood, and the other to the previously prepared square.

A selection of exhaust umbrellas from the store

Hood umbrella for barbecue areas KM-9.1 ★

A tall pyramid-shaped structure with sloping edges, which simultaneously serves as both a roof for the brazier and a smoke hood. Made from durable structural steel.

The thickness of the metal sheets reduces the risk of deformation of the umbrella under the influence of heat from the firebox.

To extend the chimney, pipes with a cross section of 215x245 mm are suitable. A simple and useful design that can be used both under a canopy and outdoors.

Specifications

• Case material: steel.
• Metal thickness - 1.5 mm.
• Hood height: 125 cm.

• The length of the hood is 83 cm.
• Hood depth - 46 cm.
• The weight of the structure is 21 kg.

pros

• High quality material.
• Attractive shape without unnecessary sharp corners.
• You can extend the chimney.

Minuses

• Heavy construction.

Large double-walled exhaust dome for barbecue areas Loft-13 ★

This hood is an octagonal dome with a double wall. This design feature increases the level of heat absorption and increases the fire resistance of the umbrella.

These indicators, in turn, increase the fire safety of the hood. A convenient and reliable dome that can be installed in covered gazebos over a barbecue, grill or tandoor.

Specifications

• Case material: steel.
• Metal thickness - 1 mm for the outer wall of the dome, 2 mm for the inner wall of the hood.

• Hood height: 126.1 cm.
• The diameter of the dome is 100.2 cm.
• The weight of the structure is 65 kg.

pros

• Durable thick walls that do not deform from heat.
• Low level of fire hazard.
• High quality steel.

Minuses

• Heavy weight.
• It is necessary to secure the hood above the structure.

Hood umbrella for barbecue areas KM-9 ★

This exhaust hood is made of 1.5 mm thick structural steel. With this design you can remove smoke from summer terraces or gazebos while cooking on a grill, barbecue or tandoor.

The hood has a small cover that protects the outlet from precipitation. If necessary, you can extend the chimney using pipes with a cross-section of 215x245 mm.

Suitable for use not only on areas with canopies, but also in open areas.

Specifications

• Case material: steel.
• Metal thickness - 1.5 mm.
• Hood height - 94 cm.

• The length of the hood is 83 cm.
• Hood depth - 44 cm.
• The weight of the structure is 18 kg.

pros

• There is a possibility of extension.
• Convenient shape.
• Durable metal.

Minuses

• Heavy weight.

Hood umbrella for barbecue areas with apron ★

What makes this design stand out from other smoke-removing devices is the presence of an “apron”, thanks to which the barbecue or barbecue grill can be installed next to the walls in covered or semi-covered areas.

It is possible to manufacture to order according to specified dimensions, with the required chimney diameter. A convenient option for a country gazebo or a small partially covered terrace, where you can put a barbecue against the wall to save space.

Specifications

• Case material: steel.
• Metal thickness - 1.5-3 mm.
• Hood height - 120 cm.

• The length of the hood is 100 cm.
• Hood depth - 40 cm.
• The weight of the structure is 25 kg.

pros

• High quality material.
• Possibility to extend the chimney.
• The presence of a wall protecting the space behind the fryer.
• Low risk of deformation from heat due to thickened walls.

Minuses

• There is no cover to protect the umbrella opening from precipitation.

Exhaust umbrella for barbecue, wall-mounted, made of galvanized steel with a tire rail ★

This barbecue hood requires additional chimney installation. The structure is made of galvanized steel 0.5 mm thick.

This model is perfect for installation in public catering places, outdoor cafes, and kitchens. But here you need to take into account that the dimensions of an umbrella on a tire rail increase around the perimeter by 25 mm.

Specifications

• Body material: galvanized steel.
• Metal thickness - 0.5 mm.
• Hood height - 40 cm.

• The length of the hood is 50 cm.
• Hood depth - 30 cm.

pros

• Suitable for installation in public catering outlets with high production turnover.
• High-quality steel with a protective coating.
• Can be installed directly on the grill, rather than hanging over the roasting pan.

Minuses

• A chimney needs to be installed.

Tips for use

In some cases, even after installing the hood, smoke may remain in the gazebo. Usually this does not indicate an incorrect hood or its incorrect installation. In some cases, the lack of draft in the hood is caused by low smoke temperature. This usually happens at the beginning of the cooking process. The situation is solved by heating the air and the hood as the fire flares up. If, after the temperature has reached a good level, combustion products still remain in the gazebo, it is necessary to analyze whether the height of the hood pipes is correctly selected.

The extreme point of the exhaust pipes should be higher than the roof ridge. There should also be no tall objects nearby that could reduce the draft in the hood pipe. Typically, a height of three meters from ground level is sufficient for the exhaust pipe. The problem does not always lie in the height of the exhaust pipe. It may be in cross section. That is why, when designing the assembly, it is necessary to take into account that the optimal side size for a square hood is 26 cm. The round pipe that extends beyond the roof from the hood must have a diameter of at least 15 cm.

Specifics

The main aspect that should be taken into account is this: the hood dome is necessarily larger in area than the equipment over which it is located. This way the smoke is collected much more efficiently. The chimney should have a narrowing and bend. This improves the dynamics of exhaust combustion products and prevents reverse draft. The top side of the pipe is usually positioned at least 3 m from the ground. This provides the necessary exhaust conditions. If the cross-section of the chimney is incorrectly calculated, the result is ineffective removal of combustion results.

Every owner is especially proud when through his own efforts he creates both a barbecue and a hood for it

Thanks to additional components, the efficiency of the hood is improved. But this requires additional costs. These components are:

Spark absorber The position is the top of the chimney. This is a tubular metal sieve. Smoke flows easily through it and sparks are extinguished. Grease catcher. This frame has a special cassette inserted (the cassette is replaceable) for capturing fat. When this device becomes dirty, it needs to be rinsed thoroughly or replaced altogether.

It is important here how the model is set up and what filtering agent is used. Fan

It seriously develops traction power. When installing it, it is necessary to make competent calculations regarding the parameters of the required equipment.

Features of choosing hoods for gazebos

• As a rule, barbecues are most often arranged in gazebos. Consequently, hoods for barbecues are also obtained there.
• The gazebo itself, its components and the grill must be made of fire-resistant materials. Wooden elements are impregnated with fire-resistant varnishes.
• Here you may have a dilemma: what kind of hood to install? If the grill is made of brick, then in most cases the hood is made of brick. It is characterized by an impressive operational period, but requires a lot of space for placement. That is, if your gazebo has large parameters and a brick grill, then the choice is given to a brick hood.
• If the gazebo is small and has a grill of modest parameters, then a metal hood will do.

These are the basics of choice. But they do not always have to be followed. It’s just that a metal version of a hood for a barbecue in a gazebo is easier and more efficient than a brick one. And it is she who is given preference most often.

General characteristics

A barbecue hood, like any other ventilation system, is designed to purify the air, and in this case also to remove combustion products, food odors, etc. Its design solutions can be varied, based on the required power, location of the barbecue, etc.

However, the principle of operation of the hood itself is quite simple - it does not contain complex components and mechanisms. In its most general form, it can have two design solutions:

• Exhaust umbrella for barbecue.
• Ordinary chimney.

If everything is more or less clear with an ordinary chimney, then few know what is meant by an exhaust hood. This device is designed to remove smoke, fumes, grease and soot that arise during the use of the barbecue. Such umbrellas can be designed in different shapes - dome, parallelepiped, truncated pyramid.

The hood can be made of metal or brick; it can be stationary or portable.

There are no difficulties in acquiring an exhaust system or even making one for the barbecue with your own hands. However, it is worth considering a number of nuances, the main one of which is the location.

Design requirements

It was said above that the walls of the metal must be smooth so that soot does not settle on them. Other requirements for high-quality metal hood are:

• corrosion resistance;
• sufficient funnel area;
• correct metal thickness.

The ideal metal that can become the basis of such an umbrella is stainless steel. It perfectly withstands moisture, as well as various aggressive substances that can reach the surface along with smoke. In some cases, galvanized metal is used to lighten the structure, but its service life is significantly lower than that of steel. The minimum metal thickness should be 2 mm. Only in this case can you be sure of a long service life. The area of ​​the wide part of the hood should be two or more times the area of ​​the barbecue that will be located underneath it.

When using the structure only in the summer, there is no need to install additional modules. If your plans include cooking during the cold season, then it makes sense to think about additional fans that would speed up the release of smoke. In some cases, it is also necessary to install filters. Ready-made metal hoods are available for sale, so in some cases it makes sense to buy them. When making a barbecue yourself, the finished project may not fit in size.

Advice! Electrical wiring should not run near smoke exhaust ducts. It is worth placing it as far away as possible. Due to overheating of the braid, a short circuit may occur and a fire may occur.

A few words about folding barbecues

The folding barbecue is a lightweight brazier that can be easily moved and installed in the right place, including in the gazebo. The best material for its manufacture is considered to be stainless steel, the optimal wall thickness is two millimeters.

Thinner sheets will quickly burn out, thick ones will significantly increase the weight of the structure. To improve the combustion process, through holes are made around the perimeter of the lower part of the fryer. Through them, coals can fall onto the floor of the gazebo and ignite it

In addition, the folding grill easily tips over, so you need to use it very carefully

Advantages

However, a folding grill has certain advantages. These include:

• light weight for easy transportation;
• when disassembled, the grill easily fits into the trunk of a car;
• low cost.

The big advantage of a folding barbecue is the ability to use it without installing a hood.

A small roasting pan does not produce a lot of smoke when cooking meat. As a rule, a folding barbecue is installed in gazebos, which are a canopy without walls. In closed gazebos it must be equipped with a hood.

Newbie mistakes

When designing a hood, beginners make ridiculous mistakes, because of which they then have to redo everything:

1. Narrow chimney. Some people make a chimney with a narrow cross-section, and as a result, it will not be able to absorb a sufficient amount of smoke. This will lead to a rebuild of the entire hood. To avoid this problem, calculate the cross-sectional dimensions based on the fact that for a metal hood it is more than 15 cm, and for a brick hood it is 26 cm or more.
2. The pipe is too short. The aerodynamic properties of the device directly depend on the length of the pipe. In order for it to draw in a normal amount of smoke, its height must be at least 3 m.
3. Use of unsuitable materials. Since we are dealing with fire, all materials must be fireproof. Also, do not forget to further strengthen them by covering them with an anti-corrosion coating.

So, we looked at the features of a barbecue hood and how to make it. In conclusion, let's say a few words about the operating rules. Regularly clean the external (with detergents) and internal (with fat-dissolving agents) parts of the hood. Don't forget to clean the grease trap. Use a chimney brush to clean the chimney. The chimney pipe must be protected from rain and snow.

Some notes and recommendations

Any hood, including self-made devices, has certain disadvantages that should be kept in mind in advance so that you do not have to re-install it later.

The barbecue fan is installed after masonry using special bricks and clay mortar. Bricks should be laid flat on top of each other. The chimney must have a damper, and the back wall must have a bend that provides improved draft.

If you need to light a barbecue, the smoke will not go straight into the smoke collector. At first the device smokes in different directions. The smoke generated during the ignition process can have a fairly low temperature level. The moment the flame flares up, the draft becomes stable.

After the flame flares up, the smoke collector may not be able to cope with the removal of smoke, that is, the barbecue smokes. This sign indicates that the chimney has a small cross-section. Since it should cope with its functions without any problems, the dimensions of its square section should be at least 26x26 cm.

The best aerodynamics of a vertical metal pipe is ensured only with its narrower cross-section, the diameter of which is about 15-20 cm. Since the smoke coming out of the pipe begins to interfere with the cooking process, the upper part of the chimney should be located at a height of at least 3 m above the ground. Then there will be enough thrust, and the smoke will be brought to the required height and then dissipate in the air.

Advantages and disadvantages

Metal variations of hoods are attractive due to their light weight and affordable price; they can be equipped with additional equipment. Such models have a simple design and are undemanding to installation conditions. Brickwork structures are more reliable and have a long service life.

The presence of a fan for the barbecue means that cooking “smoky” dishes will take place in comfortable conditions; if you wish, you can also arrange a dining area here - all combustion products will leave the room through the hood. The only downside may be the need for careful design before starting to assemble the system.

Types of smoke exhaust structures

The types of smoke exhaust structures and materials for their manufacture do not differ in variety. In gazebos of any type, chimneys for barbecues are made of metal or brick. Brick structures are mainly used in stationary barbecues made from the same material.

They look very attractive, but cleaning them properly is quite difficult, and sometimes simply impossible. To build a brick chimney, you must have the skills of a mason; in addition, the cost of such a structure is much higher than that of a metal product. Therefore, prudent owners most often prefer to build a metal hood over the barbecue.

Metal

Chimneys made of metal have the following advantages:

• availability of DIY assembly;
• ease of installation;
• low weight;
• smoothness of the inner surface;
• ease of cleaning;
• the ability to give the product any shape.

Almost any home craftsman with skills in working with power tools and welding equipment can assemble a metal chimney.

If you do not have a welding machine, you can secure the structural elements with bolts. The metal hood does not create a serious load on the base of the gazebo; its walls have a smooth surface, on which, unlike brickwork, soot contaminants do not stick. If it is necessary to use it seasonally or move it to another place, the structure can be easily disassembled. It can be painted any color with heat-resistant paint.

Useful options

If you want to make your hood more functional, modify it by adding new elements. This will make its operation more comfortable, and you will need to spend less time cleaning after cooking.

So, what are these additional elements:

1. Spark arrestor. It looks like a metal cylinder with a fine mesh, and is installed at the outlet of the chimney. Its function is to trap sparks that fall into the chimney along with smoke. This reduces the risk of fire. This element can be made with your own hands.
2. Fan. Improves the performance of hoods that are installed in closed gazebos. It is installed directly into the chimney opening and connected to the electrical network using a wire.
3. Grease trap. Since particles of fat come out into the ventilation along with smoke, this device is installed. It helps reduce chimney clogging. If you do it yourself, do it only on removable frames that can be removed and washed.