We make an umbrella for the ventilation pipe. Which umbrella for the exhaust pipe is better: types, device and installation. Quality products from a reliable supplier

The root of construction troubles is hidden in the details. Neglecting small details, the owner of private housing inflates the family budget inefficiently with repair costs. But if the owner treats the house as a whole organism in which everything is interconnected, his money does not fly out the pipe, and the costs are limited to scheduled maintenance. Improper installation of protective devices on the chimney provokes losses - both financial and human.

Installing an umbrella on the chimney helps to maintain the heating system in optimal mode, prevent premature aging of the chimney, and improve air circulation in the house.

Caps and caps on pipes are designed for the following purposes:

• close the ventilation duct, protecting it from rain, snow and dirt. The lack of protection can lead to the accumulation of a large amount of water in the chimney, which contributes to a decrease in draft and, accordingly, a drop in the efficiency of the heating system;
• protect the pipe material from damage, removing accumulated condensate due to the presence of special grooves;
• do not allow insects and birds to fall into the pipe, serve as an obstacle for leaves and branches from trees;
• perform a decorative function. They give the roof a complete look, especially if the design contains elements of artistic forging.

Note! Using an umbrella, you can solve one of the problems of dampness in a house or bath. If the pipe is open to all winds and rains, the moisture that has got into it penetrates into the premises. As a result, the walls and floors are affected by the fungus, an unpleasant smell appears in the air.

Some types of caps have a design that creates a rarefied environment in the upper part of the pipe. Due to this, an improvement in draft in the chimney is achieved, excess moisture, exhaust air and combustion products are removed faster.

The main purpose of an exhaust ventilation hood is to protect vertical ventilation ducts from rain, snow, and leaves. Even such a small detail of exhaust ventilation as an umbrella must comply with technical standards. An unsuitable ventilation hood can cause poor traction, precipitation, or blockage of the system.

The size and type of the umbrella is selected depending on the parameters of the ventilation duct neck. Protective devices are produced in accordance with TU and GOSTs, their dimensions and characteristics are determined by SNiPs.

Types of ventilation umbrellas

Depending on the shape and purpose, exhaust ventilation hoods are:

• round;
• rectangular;
• exhaust;
• sewer.

Round ventilation umbrellas

Round umbrellas are installed on the heads of ventilation pipes of the corresponding section. They are suitable for systems with any type of draft, protecting pipes from precipitation. Umbrellas are fastened with a bandage, flange or nipple connection.

We produce round umbrellas for ventilation systems from:

• sheet galvanized steel;
• copper;
• of stainless steel.

Plastic is used mainly for the production of ventilation sewer umbrellas.

Some models are supplemented with a mesh that covers the outlet from small rodents, birds, and dry foliage.

Rectangular ventilation umbrellas

Rectangular and square ventilation hoods are usually installed on insulated exhaust shafts. Fasten with a nipple connection.

Rectangular umbrellas for ventilation are produced from sheet steel with a thickness of 0.55 - 1 mm according to specifications. The aspect ratio can be selected depending on the design of the mine, but taking into account GOST for ventilation system umbrellas. The outlet of the rectangular ventilation hood can also be covered with a mesh.

Sewer ventilation umbrellas

PVC umbrellas for ventilation of internal sewerage have the same protective function, but they also regulate the pressure in the pipes. The ventilation umbrella is installed on the head of a non-pressure sewer pipe, it can withstand up to +60 degrees. For fixing PVC ventilation umbrellas, a socket connection is used, which is sealed with a rubber ring that does not allow leakage.

GOST requirements for PVC umbrellas of ventilation systems:

The diameters of PVC ventilation umbrellas coincide with the standard size range of sewer pipes and can be 50 or 110 mm. Umbrellas for ventilation from PVC are made only under round section.

Exhaust ventilation hoods

Exhaust hoods are installed in the kitchens of cafes and restaurants above the hobs and ovens. Hot air and steam rise up and immediately fall into the dome of the exhaust hood. To increase efficiency, a fan is often built into the umbrella. There are also supply and exhaust models of kitchen umbrellas.

Exhaust ventilation hoods can be:

• Wall-mounted. They are hung on the wall above the source of heat and moisture. Umbrellas of small diameter are attached only to the wall, larger ones are additionally attached to the ceiling with chains;
• Central. Such umbrellas are installed with an "island" arrangement of plates. The optimal effect is achieved by arranging two umbrellas, which are attached to each other with their back surfaces, and chains to the ceiling.

At catering establishments, wall-mounted ventilation hoods are more often installed.

Any umbrella model consists of a body and labyrinth filters, which are periodically dismantled for washing. All parts are made of food-grade stainless steel, resistant to heat, moisture, grease and detergents.

Central and wall ventilation hoods are equipped with a drain channel and storage tanks into which grease flows from the filters.

The principle of operation of the central and wall umbrellas for ventilation is quite simple: hot air with oil particles hits the walls of the labyrinth filter, oils condense, which, as they accumulate, drain into storage tanks through sealed drain pipes. To facilitate cleaning of storage containers, a small amount of detergent is poured into them. Glasses are cleaned 1 time in 7 days.

Main characteristics

As a rule, do-it-yourself exhaust ventilation hoods are not made. Therefore, when choosing, the main parameters that determine the work will be useful:

• Dimensions. The width of the dome should be 10 cm larger than the surface of the slab. For example, with a hob width of 450 mm, the width of the umbrella is 550 mm or more. Otherwise, he will not be able to qualitatively capture steam and fats;
• Air speed and resistance. Air resistance and speed depend on the design of the labyrinth filter. In order for all the oil to settle on its walls, the air speed must be in the range of 0.8 - 1.5 meters per second. Otherwise, the quality of the umbrella will noticeably decrease;
• temperature inside. If the temperature in the umbrella is above +100 degrees, the fat will evaporate and settle in the air duct;
• Air flow. This is one of the most important indicators, which is calculated depending on the volume of the room, the power and number of stoves and ovens, the intensity of the workshop.

As you can see, it is not easy to make a ventilation umbrella with your own hands. There are GOSTs for ventilation system umbrellas that regulate the dimensions, characteristics and materials for their manufacture.

Scheme and dimensions of roof ventilation hoods

Unlike kitchen umbrellas, ventilation system umbrellas made of galvanized sheet steel are easy to make on your own.

The simplest umbrella for the ventilation system is made of galvanized steel sheet. It consists of a roof in the form of a cone, a cylindrical base and 3 holding legs.

To work, you will need the following tools:

• galvanized sheet;
• a sheet of cardboard;
• pencil;
• ruler;
• compass;
• metal scissors;
• rivets or bolts with nuts.

Starting to create a ventilation umbrella with your own hands, you need to familiarize yourself with the size ratio.

Dimensions in centimeters:

Dimensions in centimeters:

• On a sheet of cardboard, draw a drawing of the individual parts of the umbrella (legs, roof and holding legs), using the above diagrams and dimensions;
• Cut out every detail and get patterns;
• Transfer images to metal, cut out using metal scissors;
• Fasten the metal with rivets. When the leg and roof are ready, connect them together with the paws.

Although a home-made tin product can properly serve for more than a dozen years, plastic products are more often used as sewer ventilation umbrellas. They are very neat, practical and durable.

Video review of a plastic sewer umbrella (fungus):

The perfect functioning of the exhaust ventilation ensures that hot air is removed from the kitchen areas, facilitating the flow of fresh oxygen into the building. The use of centrifugal fans ensures the creation of a strong air flow, which is the key to effective ventilation.

Duct protection

A well-thought-out ventilation system provides efficient air flow. The removal of heated air filled with combustion products and all kinds of carcinogenic substances frees up the space of the room, opening up the possibility of replacing it with flows of fresh atmospheric oxygen. The most effective option for creating a reliable ventilation system is the use of round galvanized air ducts, which ensure the creation of a light and airtight system.

The umbrella is round. Specifications

Umbrella diameter d, mm	Cap diameter D, mm	Height H, mm	Nipple connection Price	flange connection Price
100	170	220	197	291
125	213	243	197	298
140	238	256	218	324
160	272	274	225	330
180	306	292	480	596
200	340	310	269	384
225	383	333	280	400
250	425	355	290	410
280	476	382	310	463
315	536	414	343	497
355	604	450	452	625
400	680	490	514	696
450	765	535	586	806
500	850	580	845	1066
560	952	634	922	1181
630	1071	597	1134	1431
710	1207	639	1423	2034
800	1360	720	1610	2250
900	1530	810	2250	3161
1000	1700	900	2799	3785
1120	1904	1008	3630	4818
1250	2125	1125	3630	4486

The air outlet area on the roofing is equipped with protective devices connected to the air ducts. The round umbrella is used for complex protection of outlet openings of air ventilation systems. The successful combination of a simple device and high functionality ensures the popularity of using round umbrellas on roofing of various designs. Round umbrellas made of galvanized steel have numerous advantages, among which the following characteristics stand out:

• A light weight;
• Low cost;
• Corrosion resistance;
• Protection against penetration of precipitation;
• Unobstructed air flow;
• Protection against ingress of foreign objects;
• Gives a finished look to the roof structure of the structure.

Quality products from a reliable supplier

The company "Venti" supplies reliable products for the protection of air duct systems, ensuring the creation of effective ventilation, protected from the influence of atmospheric factors. A wide choice of different designs and standard sizes allows you to choose a copy that exactly matches the diameter of the air ducts, fan power and unique roof design.

In rooms associated with cooking, there are large emissions of steam, fats, combustion products, etc. To prevent their spread to other rooms and to clean the air from them, exhaust hoods are often used. Next, we will consider what these devices are, their types and features.

Installation of kitchen exhaust systems

Any room has a ventilation system that provides fresh air inflow and polluted outflow. However, such ventilation is not enough for cooking places, because emissions, before getting into the general system, spread throughout the room and mix with clean.

Therefore, in the food industry and in household kitchens, local ventilation is usually used, the main element of which is a ventilation hood. Most often, this is a domed structure that is connected to a common ventilation system.

Umbrellas for ventilation systems are made of galvanized sheet steel so that when hot air enters the box, oxidation and even more air pollution do not occur.

The whole structure consists, as a rule, of several main elements:

• box- is the main product, as it prevents the spread of emissions throughout the space of the room, and is also a housing for other parts.
• Filters– as a rule, all models are necessarily equipped with a grease trap. In addition, they may have additional filtration systems.
• Fan- forcibly sucks polluted air into the box. I must say that it is not available in all devices. For example, if the structure is connected to forced exhaust ventilation, then it may not.
• air duct- a channel through which polluted air enters the ventilation system from the duct. The diameter of the duct can be different: 110-150 mm. In addition, there are square and rectangular ducts.

Note!
When working with open fire, the product must be equipped with a flame filter.

Depending on the type of device, the design may have some nuances. For example, recuperative ventilation hoods do not have an air duct, as they are not connected to general ventilation. The air in such devices undergoes fine cleaning and enters back into the room.

Thus, the principle of operation of the design is quite simple - polluted air is sucked into the hood, it is cleaned there to prevent it, and then it is brought out through the air ducts.

Kinds

All existing kitchen umbrellas differ in several ways:

Household and industrial hoods

An industrial exhaust hood for ventilation is in many ways similar to household hoods.

The difference is only in a few points, such as:

• Size - industrial devices have much larger dimensions, as they cover the area of ​​\u200b\u200bindustrial furnaces.
• Fan power is much higher.
• Filters - industrial hoods have special grease traps, from which the settled impurities drain into a special glass. Such a drive must be periodically emptied and washed with soapy water. Household devices, as a rule, have paper and fibrous disposable filters.

I must say that the difference between industrial and domestic hoods is sometimes not very pronounced. For example, devices are often installed in cottages, which are very similar in their characteristics to industrial hoods.

Note!
The price of these products mainly depends on the fan power, dimensions and availability of additional functions.

Mounting methods

As mentioned above, there are two types of hoods according to the installation method:

• Island ventilation umbrellas - suspended from the ceiling. They are often installed above kitchen stoves located in the middle of the room. As a rule, such devices contain several rows of filters.
• Wall-mounted - as you might guess from the name, they are mounted to the wall. Such structures are often installed above stoves located near the wall. Do-it-yourself installation of such a hood is quite simple.

Note!
When installing the hood above the stove, according to GOST for ventilation system umbrellas, it must be at least 100 mm larger than the hood.
This will avoid the release of harmful substances into the environment.

It should be noted that the umbrellas of ventilation systems have a completely uncomplicated design. A rectangular chimney umbrella consists of a main body, a grease collection tray and filters that perform. Filters are always installed at an angle of exactly 45 degrees Celsius.

If we are talking about supply and exhaust hoods, then in this case it is imperative to use a grill or a device such as a diffuser.

In some cases, air duct umbrellas are also equipped with additional elements, such as connection ears, fans, lamps and many others.

1 The principle of operation of the ventilation hood

This device works as follows. The air that is processed to become hot has a much lower density, and therefore rises to the top, and it is replaced by cold air currents.

Then the air enters the pipe and passes through special grease filters, where it is saturated with a large amount of oil vapor, due to which it begins to cool over time.

In the end, passing through such a pipe due to strong temperature changes, the oil condenses, air flows begin to separate from it and allow the fat to drain into the bath through special channels.

In turn, the air, which after such a process is purified, enters the round or.

2 Device classification

Today, two types of rectangular umbrellas are used for the chimney:

1. Hoods . Their main purpose is the complete elimination of unnecessary gases, substances, combustion products from the chimney. Heavily heated air streams are drawn in by an umbrella, after which they are transported through a pipe where grease filters are placed and are eventually transported back to the air duct, with the help of which they are removed from the building. All this can be easily done by hand.
2. Supply and exhaust umbrellas . Thanks to them, both the exhaust of polluted air and the supply of new, clean air into the room are ensured. These umbrellas are best used in those rooms where, due to certain circumstances, the flow of clean air is limited. It is always necessary to carry out the calculation, taking into account the fact that the volumes of supplied and exhausted air flows will always differ from each other. Therefore, in no case should you rely on the fact that exhaust hoods will contribute to the complete destruction of odors, gases and other substances. Although the chimney, of course, will work much more efficiently.

There is also a classification according to the type of construction. So, exhaust and supply-exhaust rectangular and round umbrellas are divided into island and wall.

2.1 Do-it-yourself installation and calculation features

I would like to note that installing such umbrellas with your own hands is quite real, since in fact there is nothing complicated in such work. Below are some of the most popular ways to install a chimney umbrella.

• Method number 1. Installation of wall exhaust hoods using anchors. After a certain calculation, the length of the umbrella is selected and 2 or 3 equal holes are drilled in the back of the wall. Using enlarged models of washers, the exhaust hood is first attracted, and then installed on the wall. It is very important that the wall is perfectly flat.
• Do-it-yourself installation of rectangular umbrellas through collets and studs to the ceiling. At the very beginning, it is necessary to drill 4 identical holes for the studs. All these holes are drilled strictly along the edges of the umbrella, after which the device is attached directly to the ceiling. A modern chimney works perfectly if this option is used. The only negative, the calculation of the ceiling height to the standard length of the stud, does not allow the use of this technology if the height of the room is more than 4 meters.
• Installation of exhaust hoods for the chimney using various cables and chains through anchors and brackets to the ceiling. In order to do everything with your own hands, you need to weld 4 brackets of the required parameters to the upper horizontal part of the umbrella, after which, using a carabiner, securely fix the chain or cable. The second end of such a chain or cable must also be securely connected to the ceiling. Among the disadvantages of this method, one can note the precariousness of the structure, so it is not at all easy to tie it with air ducts, but such a scheme is perfect for a chimney.

As you can see, it is not at all difficult to do the installation yourself. The main thing is to adjust the umbrella as close as possible to the chimney pipe and take into account some of the nuances.

Application area

Supply and exhaust and exhaust hoods of ventilation systems are widely used today by industrial enterprises and not only. Such systems are widely used in public catering establishments, such as restaurants, canteens, bars, food processing plants, cafes and so on.

Also, the installation of umbrellas is carried out over all kinds of devices of thermal equipment, in particular, this applies to deep fryers, gas stoves, and ovens. If the calculation allows you to install such umbrellas, then they are also used in various industrial premises - food, pharmacological, physical, chemical.

2.2 It looks like a ventilation rectangular umbrella - video