Dimensions of bimetallic batteries. Dimensions of bimetallic heating radiators: height, depth, center-to-center distance. The positive aspects of using bimetallic radiators

If you read our article about the characteristics of aluminum radiators, then you probably remember that with all your positive qualities these devices have a number of significant drawbacks that do not allow their full use in city apartments. Now we will talk about their bimetallic counterparts, which will help overcome all technical limitations when installed in multi-storey buildings. residential buildings connected to public heating networks.

The bimetallic radiator looks the same as the aluminum one. This is understandable: its outer body is made of the same metal and painted with the same paint. You can distinguish it only by weight - it already affects internal structure device containing steel inserts protecting aluminum from direct contact with the coolant. It is thanks to them that the battery sections are not subjected to the destructive action of various impurities that are transferred along with the coolant in the utility network. In addition, steel is much more resistant to acids and alkalis, which are also rich in urban heating systems and does not interact with copper pipes and heat exchangers.

The use of a steel core for the passage of the coolant provides other useful features bimetallic radiators:

• Strength. The maximum pressure that the body of a bimetallic radiator can withstand is 30-40 atmospheres. Such a device is not afraid of any water hammer;
• economy. The narrowing of the coolant supply channels makes it possible to achieve the optimal combination of energy consumption for heating and the thermal inertia of the radiator;
• Durability. The resistance of steel internal cavities to corrosion and destruction allows manufacturers to set a long service life for their products - on average up to 20 years.

If we add here the advantages that have passed from aluminum models, such as high heat dissipation, elegant appearance and compact dimensions, it can definitely be said that bimetal radiators are the best choice for heating a city apartment today.

Dimensions

To choose a bimetal radiator great importance have their dimensions. Typically, heating appliances are installed under the window in order to create thermal curtain cold air passing through the glazing. The radiator must fit into the existing niche and provide the necessary heat transfer characteristics.

The dimensions of heating radiators in height have standard values. Devices are produced with a center distance of 200, 350 and 500 mm. Usually these numbers are contained in the model name.

However, it should be borne in mind that the center distance is not the total height of the body, but only the length of the segment between the centers of the inlet and outlet manifolds. The actual height of the device can be obtained by adding 80 mm to the center distance.

So, for example, a radiator marked 350 will take about 430 mm, and the 500th model will take about 580 mm.

It must be borne in mind that technical standards provide for a distance of at least 100 mm from the body of the appliance to the window sill and at least 60 mm from the body to the floor.

The width of the battery depends on the number of sections, which is determined by calculation. We will talk about this in the next section.

Radiator calculation

The determination of the number of sections for all types of radiators is carried out in the same way.

Technical requirements for heating houses in middle lane Russia determines the power required to heat 1 m 2 of area, equal to approximately 1 kW.

For each battery, the manufacturer usually indicates the power value of one section. Sometimes this parameter is called a little differently - the heat transfer of the section. Knowing the power, the number of sections can be calculated by the formula:

where N is the required quantity, S is the area of ​​the room, Q is the power of one section.

The standard section width of most models of bimetallic radiators is 80 mm, the heat transfer of a conventional 500 mm section is about 180 watts. Thus, if our room, for example, has an area of ​​​​20 m 2, then 12 sections will be needed to heat it, and the width of such a radiator will be about 1 m.

Design features

As we have already said, the difference between a bimetallic radiator and an aluminum one is that, according to its inner surface steel tabs are laid to protect the body material from corrosion.

Steel tabs can be installed in different parts radiator:

Section capacity and connecting dimensions

Due to the presence of steel inserts inside the bimetallic radiator, its section capacity is even less than that of aluminum. On the one hand, this is good, and we have already noted the better small size sections is a reduction required amount coolant and thermal inertia, and as a result - comfort in operation and energy savings. But we must not forget that too narrow channels can become clogged with debris and sludge, which are inevitably present in modern heating networks.

The width of the channel depends on the wall thickness of the steel insert. The thicker the walls, the better the characteristics of the strength and durability of the radiator, but the narrower the channels for the coolant.

A good bimetallic radiator has wall-thick steel inserts water pipe. In this case, the capacity of the section depends on the center distance:

• For a battery with a distance of 200 mm - 0.1-0.16 l;
• For 350 mm batteries - 0.15-0.2 l;
• For 500 mm - 0.2-0.3 l.

As we can see, the volume of coolant in such radiators is really small. For example, the popular RIFAR 10-section heater with a height of 350 mm holds only 1.6 liters. At the same time, it is able to heat an area up to 14 m 2, and its width is 80 cm. However, it will weigh 14 kg. This just says that the radiator is bimetallic - usually they are 1.5-2 times heavier than aluminum ones.

Most bimetallic radiators are sold in one section. This is convenient, because you can buy exactly as many sections as you need to provide the required power. Each section has two inlets and two outlets, ¾" or 1" ID, depending on the model. For ease of assembly, two of them have a right-hand thread, and two have a left-hand thread.

Installing a bimetallic radiator makes sense only in city ​​apartment. If you have a private house and own heating boiler, it is better to buy an aluminum battery.

When choosing a bimetallic radiator with the desired heat dissipation, it is recommended to take into account the following characteristics:

1. Operating pressure. It usually does not exceed 15 atmospheres. The radiator must withstand such a load;
2. Power. It is necessary to calculate the number of sections according to the above method;
3. Dimensions. The width of the radiator is determined by the number of sections, and the height is determined by the center distance. For standard window sills 80 cm high, the 500th model is suitable, but if it does not fit, you need to take the 350th modification;
4. Thickness of steel tabs. Make sure it's not too small. An indirect indicator of the thickness of the tabs is the weight of the device;
5. Price. Usually bimetallic radiators cost at least 15-20% more than aluminum ones.

If you do everything right and choose suitable radiator, heat in your house will not be in short supply even in severe frosts.

In order for the house to always be warm, the heating worked without failures and was distinguished by a low price, it is necessary to choose the right heat source and radiators. It depends on them how efficient the operation of the entire system will be. Today on Russian market can be seen very a large assortment very different heating devices. Among such an abundance, bimetallic radiators can be called the most profitable.

Any bimetallic heating radiator is made of two main elements:

• metal pipes;
• aluminum panels.

Due to this combination of components, a very efficient heat transfer occurs. The hot coolant moves along a steel core made of metal pipes. The aluminum shell heats up quickly and heats the room well.

The figured aluminum shell of such a core has a beautiful appearance. She plays important role in an even distribution of heat.

Thanks to aluminum panels, the radiator is quite light when compared with similar cast-iron batteries. This makes it much easier installation work. original form The case is always eye-catching. A bimetallic radiator, in addition to a stylish look, increases heat transfer many times over.

The metal pipes from which the core is made are characterized by increased strength. They can freely withstand a pressure of 40 atmospheres and a coolant temperature of over 130 degrees.

Each device is accompanied by a passport, which indicates limit parameters coolant temperature and maximum pressure.

Which is better: monolith or section

When choosing bimetallic equipment for your heating, you need to think about the design of the radiator itself. It has several varieties:

• sectional;
• monolithic.

Comparative characteristics of such devices can be seen in the table below:

Manufacturers accompany their products with a variety of technical materials. They include instruction manual, user manual and product catalogs. In the tables presented, you can understand how many sections are needed to heat a room of a certain area.

Sectional systems with their performance characteristics are significantly inferior to monolithic bimetallic radiators. Leaks can form at the joints.

The main disadvantage of monolithic structures can be called their cost. It is much higher than the price of sectional devices.

Monolithic bimetallic radiators must be installed in high-rise buildings. The fact is that the coolant is always supplied under very high pressure. Only monolithic structures can freely bear it.

Comparison of bimetallic radiators

Each owner, creating in his house heating system, always tries to choose a product that has the most optimal technical specifications and best performance.

To compare bimetallic radiators, consider them specifications.

First of all, they must have the same size.

All directories indicate the parameters of only one section, but this is not enough for comparison. This means that it is necessary to compare not the devices themselves, but only the structural parts.

The main parameter of any battery is its center distance. It is measured between the axis of the upper and lower manifold. Today, models are mainly manufactured in which the center distance is in the range of 200–800 mm.

Devices with a large center distance are usually produced with a greatly increased section height. However, the width of the radiator is much smaller. Such structures are quite rare. They are used only when the interior of the room is so small that it makes it impossible to install a horizontal radiator.

Dimensions of bimetallic radiators

The most important geometric parameters devices are considered:

• width;
• height;
• section depth.

Usually the height is greater than the center distance by 60–80 mm. Mostly, factories produce devices in which the section width is not more than 80 mm. The total width of the radiator is determined by the number of sections.

The depth is in the range of 80–100 mm. This dimension may be constant or vary in height. bright representative such a design is the device of the company "Royal Thermo" from the series "Dream Liner".

Appliance power

Depending on the value of this parameter, the number of battery sections is determined so that a specific area can be heated.

Section capacity

The coolant circulates through metal cores. This is an H-shaped system with 2 collectors connected by a vertical pipe. The sections are connected with steel nipples. This design does not allow aluminum to come into contact with the coolant.

The cores of bimetallic devices are made of round tubes, which make it possible to reduce the capacitance of the section. For example, in the Rifar Base 500 model, the capacity reaches 0.2 liters, and in a conventional aluminum radiator of the Rifar Alum 500 type, with the same size, the capacity reaches 0.27 liters.

Section weight

Bimetal radiators heating systems are heavier than aluminum ones. This is due to the use of metal cores. The density of metal is always higher than that of aluminum. Therefore, the mass is more.

For example, if you take a bimetallic radiator brand "Varmega Bimega 500/80", its weight reaches 1.75 kg. The Almega 500/80 aluminum battery, produced by the same manufacturer, weighs only 1.2 kg.

Pressure

Bimetallic devices freely withstand pressure in the range of 16–40 atmospheres. When the system is tested, the pressure is applied 1.5 times higher than the working one. No leaks are allowed. The passport of the device indicates the maximum pressure that can be in the system. If the parameter is higher, the device may be destroyed.

How to calculate the number of sections

In the instructions attached to the device, its power must be indicated. Based on this value, the number of sections is calculated.

The main indicators are calculated according to the formula A \u003d B x 100 / C:

• A is the number of required sections.
• B is the area of ​​the heated room.
• B - thermal power.

For example, we need to heat a room with an area of ​​​​12 square meters. meters and a ceiling height of 3.5 meters.
We calculate the power of one section using the formula. As a result:
A \u003d 12 x 100/200 \u003d 6 sections.

Sometimes when calculating the final number is not an integer. Rounding is done up. Manufacturers produce bimetallic batteries of various sizes, so it will not be difficult to create a combination of them.

Manufacturers

When any product is purchased, it is very important to know where it was made, which company produced it. After all, branded goods are always better than ordinary ones. This also applies to bimetallic devices.

There are many different devices on the Russian market today. Among them, the following types are considered the most recognized and popular.

Italian radiators

Engineers Italian company Sira came up with the design of a bimetallic radiator. Today, several models can be purchased on the construction market:

• "Radena";
• Global Style.

The appearance of such Italian devices differs from analogues in its attractiveness and originality. The radiators are compact, have a high quality finish, interesting design. They are designed for a long service life. One section can be purchased within 1500 rubles.

Russian appliances

Rifar remains the most popular brand. The quality of these devices is not lower than Italian models, but their cost is almost 3 times less. One section can be bought within 500 rubles.

South Korea

Bimetallic radiators are manufactured by MARS. The devices have a copper core. Each section is sold on the market for 400 rubles.

Polish models

The release is carried out by the company "REGULUS-system". As in Korean radiators, the core is made of copper tubes. The company gives a 25-year warranty on its products, subject to proper operation.

China

Chinese bimetal radiators do not have special decor, they do not differ in beautiful appearance. However, the cost of such models is an order of magnitude less than similar products.

Unique Features bimetallic batteries allow you to replace the usual cast iron radiators, while the efficiency of heat transfer and durability of new radiators is not inferior to traditional ones, and in appearance they are much superior to old models. Batteries of this type are successfully used for heating country cottage and for installation in high-rise city buildings. The steel core is able to cope with the powerful pressure characteristic of centralized networks, and is also resistant to water hammer, from which urban heating plants are not immune.

6503

In addition to strength characteristics, bimetallic products show high resistance to aggressive environments, which is important in urban environments, when the coolant is subjected to excessive alkalization or there is an increased acid content in it.

These devices are lightweight, attractive looking, they have high level heat dissipation and long service life. It is not difficult to choose a radiator of the required size, as manufacturers have launched the production of various models.

Advantages and disadvantages of bimetallic radiators

The considered devices have positive properties that distinguish them from other types of heaters:

• Extended service life. Device made with high quality without violations technological process, will reliably heat the room for at least 30 years;
• The steel basis gives to this product the increased durability;
• Steel core, especially if it is made of high carbon steel, the coolant with an excess content of alkali and acids is not terrible;
• High degree of heat transfer (up to 190 W per section);
• AT standard equipment the radiator has a temperature controller that allows you to reduce or increase heat transfer;
• A large selection of colors and many design solutions for the appearance of the product allow you to choose a radiator for any interior.

To negative qualities the following points can be included:

• Over the years, the different coefficient of expansion of the material can lead to the occurrence of internal friction, which is expressed in the appearance of noise;
• A small inlet and outlet diameter of the radiator pipes, if there are foreign substances in the coolant, can cause clogging. To avoid this problem, it is recommended to install a supply filter;
• High price.

Technical and operational characteristics

When choosing a radiator, you should pay attention to its technical characteristics, which are reflected in the product passport. Typically, the following information about the device is important for the consumer:

• Power. It is measured in W and determines the ability of the device to transfer the amount of heat to the room at a standard value of the heating network of 70 ° C. Using this indicator,
• calculate the required number of sections for a particular object;
• Material strength. This characteristic important when determining the type of heater in terms of heating system pressure. It is measured in bar and ranges from 15-35 units;
• The limiting level of the coolant temperature. Any bimetallic radiator copes with a temperature of + 90 ° C;
• Dimensions. It is important to determine the center distance and correlate it with the dimensions of the eyeliner. There are models with this indicator from 200 to 800 mm. The height, width and thickness of the product must comply with the recommended standards for installing a radiator in a room;
• Volume. Characterize the capacity of the radiator in liters, ranges from 0.15 to 0.4 liters;
• Weight. Standard products measuring 580x80x80 mm weigh about 2 kg.

The device of bimetallic batteries

Radiators of this type are produced using a complex technology by combining two types of metals. The basis of the product is a steel frame, inside which the movement of the coolant passes. The rigidity of the steel allows it to successfully withstand high pressure, as well as resist corrosion.

Outside, the frame is clad in an aluminum casing. Aluminum is able to quickly heat up and transfer heat to the atmosphere. Also, the casing is equipped with special ribs that direct the flow warm air into the room.

Prefabricated models are fastened together using nipples with the installation of rubber gaskets. Such connections can withstand temperatures up to 200°C and network pressure up to 35 atm. Cast models have no internal connections.

Types of bimetallic batteries

Bimetallic radiators are produced in two types:

1. Cast. In this case, the battery case is cast in special molds;
2. Sectional. This option is assembled from separate sections, which are joined together using a threaded connection.

The convenience of sectional models lies in the ability to build new sections as needed. It will not be possible to increase a monolithic battery in this way, but due to the breadth of the size range of radiators, they can be selected for any task.

The cost of monolithic models is higher than sectional models by 20-30%.

For heating devices in residential premises and administrative buildings both types of bimetallic heating radiators are used. Which is better for an apartment - depends primarily on the design of the heating system. For standard apartments in high-rise buildings it is better to use cast products, and in a country house, sectional ones will also perfectly cope with the load.

How to choose and what to look for

To decide which radiator to choose, it is necessary to take into account the peculiarities of the organization of heat supply at home and the following characteristics of the heaters themselves:

• the value of the pressure test, which is determined when testing the product - this indicator should not be less than the peak values ​​\u200b\u200bof the heating system;
• with an increased content of alkali or acids in the heating network, you should choose a heater with a core from of stainless steel or copper;
• the outer aluminum casing must be of sufficient thickness and not bend under mechanical stress, and the thickness of the rib protruding from the base must be 1 mm or more;
• recommended core wall thickness - more than 3 mm;
• in sectional batteries, it is advisable to check the connecting gaskets for elasticity;
• the edge of the battery must have a width of at least 7 cm, this size gives maximum heat transfer;
• minimum guarantee period(less than two years) indicates the unreliability of this device, since average term The service life of this type of radiators is from 20 years.

Monolithic or sectional

Monolithic cast products withstand significant pressure and water hammer, so they should be installed in multi-storey buildings. Sectional products are not able to withstand such tests due to the weakening of the structure by the threaded connection of individual parts, but such heaters are easy to maintain and, if necessary, build up, which is impossible in the case of cast batteries in a private home.

Bimetallic or semi-bimetallic

In addition to standard radiators made of steel (or copper) and aluminum, semi-bimetallic heaters are produced. In these products, the inner core is made not only of steel - it also contains elements of aluminum. Usually aluminum is used to install vertical pipes.

Such a replacement of the base material significantly reduces the strength characteristics of the product, and in terms of durability in aggressive heating systems, semi-bimetallic radiators differ little from conventional aluminum batteries. Connection points aluminum pipe with a steel pipe become unusable very quickly due to the difference in the expansion coefficient of these metals when heated.

Semi-metal radiators are slightly lighter than the original, so when buying, you should pay attention to this point, as unscrupulous manufacturers may not indicate the exact parameters of the product. These heaters are closer in characteristics to aluminum ones, so it is better to install them in a private house.

Distance between axles

All types of produced bimetallic radiators are subdivided according to the distance between the inlet and outlet. Most often, the distance between the axes is 350 or 500 mm, but some manufacturers make batteries with a center distance of 200 and 800 mm.

Production material

Most of the bimetallic batteries are made with a steel frame and an aluminum shell. The steel core perfectly copes with the excess pressure of the network, resists corrosion, and the aluminum shell serves as an excellent heat diffuser. Some manufacturers use high-carbon steel grades, which makes it possible to achieve higher strength characteristics and product durability.

The more expensive, but the best version of bimetal radiators, include batteries with a copper core. This is actually eternal material with high strength. The service life of such products is at least 50 years.

The best bimetal radiators

There are many models and brands of bimetallic batteries in retail chains, such as domestic production, and foreign analogues. The rating of bimetallic heating radiators for an apartment in terms of reliability includes several well-known manufacturers.

Reliable manufacturers

The most famous and reliable manufacturers include the following companies:

• global style. An Italian brand that produces radiators under the markings: Style, Style Extra, Style Plus. In the product line of this manufacturer, models with standard features and products with unique strength characteristics.
• Sira. Also a manufacturer from Italy, which focuses on the production of premium products.
• Rifar. Domestic brand. The company launched the production of heaters with different meanings center distance from 200 to 500 mm. The quality of products is confirmed by a guarantee of 10 years.
• Tenrad. A manufacturer from Germany produces heaters for private houses equipped with an autonomous heating system, but the product line also includes devices that can withstand the high pressure of a centralized heating network.
• WARMA. Joint Russian-Chinese venture. Technical task is developed in Russia, and the assembly finished products carried out in China. The radiators of this company are used both for autonomous and for central systems heating.
• Konner. Russian company producing bimetallic batteries on production facilities China. The products of this company are also universal. The features include increased anti-corrosion resistance of the metal and high strength, allowing you to hold powerful hydraulic shocks.
• TENRAD. German company placing orders for production in China. All products are quality tested by German engineers.
• Radena. The development of the design of radiators and the control of finished products is carried out in Italy. Production China. Used center distance from 150 to 500 mm. Most models are well suited for Russian operating conditions in the central network.
• Fondital. Italian manufacturer predominantly aluminum heaters. Bimetallic products are also present in the product line, and in terms of quality and cost they can be attributed to the premium segment.

This review will allow the consumer not to get lost in the multitude trademarks and choose a quality product.

Models, prices and their characteristics

The most popular and high-quality models include the following bimetallic radiators:

• WB350 from WARMA BIMETALL. This product has dimensions: height - 41 cm, depth - 8 cm, center distance - 35 cm. Refers to prefabricated batteries. The number of sections varies from 5 to 6. The power of one section is 140 watts. The maximum network pressure is up to 25 atm. 10 year warranty. The cost is 450 rubles per section.
• WB500 from WARMA BIMETALL. Dimensions: height - 56 cm, depth 8 cm, center distance - 50 cm. The number of sections is from 6 to 7. The power of one section is 180 watts. The maximum network pressure is up to 40 atm. 10 year warranty. The cost is 600 rubles per section.
• Konner. Are issued with interaxal distance of 350 and 500 mm. Both options withstand a network pressure of 30 atm. Power from 140 to 190 watts. The maximum temperature of the heat carrier is 110°С. The volume of one section is 0.14 - 0.18 liters. Dimensions: height - 413 and 560 mm, depth - 80 mm, width of one section 80 mm. Warranty 15 years. The cost for one section is about 500 rubles. Number of sections from 4 to 12.
• TENRAD BM350. The maximum pressure is 24 atm. The power of one section is 120 watts. Heat carrier temperature not more than 120°С. The volume of one section is 0.15 l. Dimensions: height - 400 mm, center distance - 350 mm, depth 77 mm, width of one section 80 mm. The cost is from 600 to 700 rubles per section. Number of sections from 4 to 12. Warranty 50 years.
• Radena Bimetall CS 500. Permissible network pressure 25 atm. The power of one section is 120 watts. Heat carrier temperature not more than 110°C. The volume of one section is 0.13 l. Dimensions: height - 552 mm, center distance - 500 mm, depth 85 mm, width of one section 80 mm. The cost is from 650 to 800 rubles per section. Number of sections from 4 to 12. Warranty 15 years.

Calculation of the number of required sections

To calculate the required number of radiator sections for efficient space heating, you will need to determine the area of ​​​​the room and know the heat transfer power of one section in watts. It is believed that in order to create comfortable conditions 0.1 kW (or 100 W) of thermal energy per square meter is enough to live, which means that the following calculations must be carried out to obtain the required number of sections.

The owners of apartments in houses with centralized heating have been waiting for a long time for manufacturers to create batteries that can withstand all its shortcomings: high pressure, low-quality coolant and powerful water hammer that can destroy weak aluminum or steel radiators.

The combination of these two metals made it possible to produce bimetallic radiators that are completely unique in their technical characteristics.

Feature of bimetallic devices

When a steel coil was placed inside the aluminum case, fixing the entire structure tightly by welding, several problems were solved at once:

Consumers who have already tested bimetallic structures in their apartments say that their only drawback is their high cost. But, as a rule, quality, safety, beauty and economy are just those properties for which it is not a pity to pay any money.

Types of aluminum-steel radiators

Manufacturers, following the lead of consumers, are trying to reduce the cost of production of bimetallic structures without changing their device as a whole. Now on the market you can find several types of batteries of this type:

If the installation of radiators is supposed to be in a room with an autonomous heating system, then it makes no sense to invest a lot of money in expensive models. In this case, it is enough to calculate the power and determine optimal dimensions bimetallic heating radiators (10 sections - this is the standard type, although you can choose a different type of device).

Types of radiators

Unlike the Soviet era, when the batteries had the same standard view"accordions", meet today different types radiators, and bimetallic ones are no exception in this regard.

Monolithic models are a one-piece section consisting of steel pipes that cannot be disassembled. Such a design cannot be changed in size, increase or decrease the number of sections. If the power required for the room is calculated correctly, then a better and more reliable "friend" for a system with strong pressure drops cannot be found. Cast bimetallic radiators are able to withstand pressure up to 100 atmospheres and are the most expensive on the market.

Collapsible or, as they are also called, sectional models, allow you to independently determine what size sections of a bimetallic heating radiator are needed for each particular room.

In order for the apartment to be truly warm, it is necessary to determine in advance how much power the radiator should have, taking into account all heat losses. The capacity of the device depends on the size of the device, and the smaller it is, the more economical it works.

Standard battery dimensions

The dimensions of bimetallic radiators are exactly the same as other types of heaters. They are determined by the center distance between the lower and upper horizontal collectors. Do not consider these parameters as the size of the entire structure. To calculate the height of a bimetallic radiator, add 80 to the center index indicated on the product. There are three center distances - 200, 350 and 500 mm, but these are not the only parameters of these devices.

• the length of the standard section is 80 mm;
• depth - from 75 to 100 mm;
• height - 550-580 mm.

To calculate what height, for example, standard bimetallic radiators of 500 mm have, you need to add 80 to this indicator, and the resulting 580 mm is its true size, which should be taken into account when determining the place where it will stand.

In addition to standard models, there are so-called design options for bimetallic radiators.

tall structures

When the interior of an apartment or office requires a special approach to the arrangement, then the heaters should harmoniously fit into it. So, if indoors panoramic windows, then it is possible to install bimetallic radiators, the dimensions of which are 880 mm or more in height, with a section length of 80 mm and a depth of 95 mm.

As a rule, these are cast reliable devices that can be mounted on walls. They can not only heat the room, but also decorate it, as they are produced in a fairly rich color scheme. In extreme cases, you can order the manufacturer a model of the desired shade or with a specific pattern.

Low batteries

Another design solution are low bimetal heating radiators. They can be installed under large windows, where standard models do not fit in height. Bimetallic radiators with a minimum center distance of 200 mm, while their feature are the same strength, reliability, high pressure capability and heat dissipation level as the standard models.

This is due to the fact that the design of these heaters does not change depending on the size. True, there are manufacturers who are "cunning", saying that the price of their products is lower due to their dimensions. In this case, in fact, bimetallic radiators (300 mm, 400 mm or 200 mm does not matter) have a different structure. They do not have a steel horizontal core, and only vertical collectors are made of this metal. You can identify a fake by the data sheet, which indicates a pressure level of 20-40 atmospheres that is not usual for "real" bimetallic heaters, but only 12-15, which is unusual for these devices.

It is not worth buying such a product in an apartment with a centralized type of heating, but in an autonomous system they will be in place.

The ratio of power and size of radiators

As shown by many years of experience using heating appliances, the width of the sections of a bimetallic radiator (like any other), its length and height are reflected in the power, and this is understandable: what more area radiator, the higher its heat transfer.

If we compare the heat transfer, mass, capacity, size and pressure level of a bimetallic structure with an aluminum counterpart, we will see what is the difference between them.

• Bimetal radiators 350 mm (center distance):
• Heat dissipation 136 W (aluminum - 139)
• Pressure level (working) 20 bar (15 bar for aluminum)
• Crimping index 30 Bar (20-25 Bar respectively).
• Section capacity 0.18 l (0.19 l)
• The weight of one section is 1.36 kg (aluminum - 1.2 kg).
• Bimetal radiators 500 (80 deep):
• Heat dissipation from one section 204 W (180 W aluminum with similar dimensions).
• Working pressure 30 bar (20 respectively).
• Crimping pressure 40-50 bar (30 bar).
• Section capacity 0.2 l (0.27 l).
• The weight of one element is 1.90 kg (1.45 kg).

As can be seen from the above parameters, the power varies depending on the size of the radiator, as well as its pressure level, and weight, and volume.

When choosing which type of batteries to install, you need to start from the real needs of the room in the amount of heat, and not from the style and quality of interior design. Luckily, modern manufacturers produce models of any level - low bimetallic heating radiators are in stores next to high analogues.

Knowing how much power the device should have, it is enough to look at the table provided by either sellers or manufacturers for each product and find the corresponding size indicator. When installing a sectional model, it can always be increased to increase power, but if the radiator does not fit under the window, then designer heater options should be chosen.

Until recently, aluminum and cast-iron radiators reigned supreme in the Russian market for heating devices. The appearance of bimetallic batteries occurred relatively recently. But already many homeowners have fallen in love with them. More can be said in this moment in popularity, they are significantly superior to aluminum. And all thanks to the characteristics that these heating devices possess.

Design features and varieties of bimetallic radiators

If we talk about the design of radiators of this type, then we distinguish two main elements - steel pipes and aluminum panels. It is they who make up the design of these products. This ensures the efficiency of heat transfer. The core of bimetallic radiators, the characteristics of which are important for any consumer, heats up the aluminum shell when passing through it hot water. From them, heat passes to the air in the room.

Aluminum shell provides bimetal radiators beautiful view, and in addition contributes to the efficient transfer of heat. In addition to this battery is light weight thanks to aluminum, which itself is a lightweight metal. This provides additional comfort during the installation of these products. The case of the bimetallic battery has an intricate shape, which has a positive effect on the appearance of the product, and in addition, it provides excellent battery properties in terms of heat transfer.

To get acquainted with the technical characteristics of a bimetallic radiator, just look at the product passport. They may be different. It all depends on the model. The manufacturer is also an important factor influencing the characteristics of the product.

At the moment, two types of bimetallic radiators are offered in stores:

• radiators that are 100% bimetallic. How should this be understood? Such products have a steel core of pipes, which is surrounded by a shell of aluminum. Their main technical characteristic is increased strength. During their operation, the occurrence of leaks is excluded. Such radiators are produced mainly by Italian companies: Global Style and Royal Thermo BiLiner. Domestic companies are also engaged in the production of bimetallic batteries, for example, Santekhprom BM;
• semi-bimetallic radiators - products that are only half bimetallic. Steel in their manufacture is used only for pipes. They reinforce the vertical channels of these batteries. In this case, aluminum is partially in contact with water. Their main advantage is that they are 10% better, in comparison with bimetallic ones, they give off heat. Their other plus is a 20% lower price.

The following companies are engaged in the production of radiators of this type:

• Rifar, Russia;
• Gordi, China;
• Sira; Italy.

Experts, even after comparing the technical characteristics of the two types of these products, there is no consensus on which of them are better suited for a centralized heating system, and which ones are best option for an autonomous system in a private house.

One of important characteristics bimetal radiator, which makes it a good solution for a centralized heating system is that he is not afraid of chemistry, which is added to the water by city services. However, under conditions of increased pressure, aluminum is noticeably superior to steel. The only thing the experts agree on is that if your home is using old heating pipes, then when replacing a radiator, it is better to make a choice in favor of bimetallic batteries.

Sectional or whole?

Most bimetallic radiators consist of certain number sections. In other words, during the manufacturing process first a whole separate section is created, and then right amount sections are interconnected. Nipples are used as a fixing element.

Note that in addition to sectional radiators, solid batteries made of metal are also available for sale. A core is made from steel immediately right size. Then it is wrapped in a figured shell made of aluminum. The finished bimetal battery has excellent characteristics. The probability that it will burst during operation is excluded even under pressure conditions of 100 atm.

Details about the characteristics of bimetallic heating radiators

Arriving at the store and picking up suitable model radiator, do not rush to give money for it. Ask the seller technical certificate per battery and carefully read the technical characteristics of heating radiators. We will talk about the parameters specified there later.

Heat dissipation

The most important technical characteristic of a bimetallic radiator is its heat dissipation. The amount of heat that the radiator gives off at a coolant temperature of 70C is measured in watts. If we talk about the average value of this parameter, then it usually varies between 170-190 watts.

Withstanding pressure during operation

For heating devices of this type, it is 16-32 atm. and depends on the model. The manufacturer of the product also matters. In a centralized heating system, the working pressure does not exceed 14 atm., And in autonomous ones it is 10 atm. To avoid rupture of the radiator from high pressure the manufacturer reserves this parameter in bimetallic radiators.

center distance

It is customary to understand the distance between the upper and lower collectors in the radiator. The following values ​​are standard: 800, 500, 350, 300 and 200 millimeters. Different values ​​​​of this parameter make it possible to choose a battery model that fits perfectly into the piping in the apartment.

Maximum coolant temperature

Bimetallic radiators are able to withstand coolant with temperatures up to 90C. Some manufacturers claim that their products can work normally with water circulating in them at temperatures up to 95C or more. But such statements should not be trusted. When choosing a heating device, this parameter should pay special attention because it affects the heat transfer coefficient.

Reliability and lifespan

Taking into account the characteristics of bimetallic radiators, we can confidently say that you can use them in your apartment for 20 years. There is no need for their maintenance.

Ease of installation

The sections that make up the bimetallic battery are exactly the same. This makes it possible to install them even to the left, even to the right of the radiator. In places where the pipe is supplied to the product, a branch pipe is connected. The plug is mounted from the opposite end. It is completed by a Mayevsky crane mounted on the side. At the bottom, another plug is being installed.

Many people know about Mayevsky's crane. He is enough convenient invention. In the first weeks heating season airing of the system may occur. Due to the presence of air in the pipes, the batteries remain cold. Using the Mayevsky crane, you can bleed off excess air from the radiator. In this case, there is no need to turn off the entire riser. The main advantage of this device is that you can get rid of air in the pipes without the help of craftsmen.

In stores you can find not only heating radiators with Mayevsky taps, but also products with pipes located on the underside. When installing the battery, a valve and a thermostat are connected to them. The latter controls the air temperature in the room.

Note that the kit for each bimetallic radiator includes pipes, plugs and a Mayevsky tap. In addition to them, it also contains brackets that allow you to securely mount the battery on the wall.

Disadvantages of bimetal radiators

Like other types of radiators, bimetallic batteries have their drawbacks. Among the most significant, we note the following:

• price is the main disadvantage of bimetal products. The cost of their acquisition in comparison with cast-iron heating appliances is very high. But they do look nicer. These heating appliances easily integrated into modern interior , and in terms of the duration of the period of operation, they are ahead of all other types of heating products;
• another disadvantage of these products is the poor resistance to corrosion of the core of these radiators, which is made of steel. This happens under the influence of water and air. Rust on bimetallic radiators can also appear under the influence of antifreeze, which is used as a coolant in autonomous systems heating is used by the owners of private houses. If the choice was made in favor of such a coolant, then the best solution- aluminum batteries.

Characteristics of bimetallic radiators of some manufacturers

On the market, many companies offer their products, which mean bimetallic radiators. About the products of some of them, their technical characteristics, we will tell further.

A well-known manufacturer of batteries of this type is Global Style. It makes products that are of high quality, and in the process of operation they show themselves as reliable. If we evaluate their technical characteristics, then we can say that for the conditions of Russian thermal networks, heating devices of this manufacturer - perfect choice. One of the advantages of these batteries is a 20-year warranty.

In addition, bimetallic radiators from an Italian company have a high heat transfer coefficient and last a long time. Of course, in terms of cost, Global Style products are expensive. But, having spent money on their acquisition, you can be sure that they will serve without problems for many years.

Another Italian company offering its products on the Russian market is Sira. The production of heating appliances has been its main specialization for more than fifty years. Main Feature its products is high heat transfer coefficient produced bimetallic radiators. Rectangular products have rounded corners, which gives Italian batteries an unusual look.

Bimetal radiators are an improved form of traditional radiators. Installing these heating devices in your apartment - perfect solution. They will provide warm atmosphere and in addition to this, they will perfectly fit into the interior of the apartment. In addition, their service life is several decades, so they will not require attention for a long time.