Heating batteries bimetallic rating. Improving the temperature regime: the best bimetallic heating radiators for an apartment. Requirements for the quality of the bimetallic radiator

Bimetallic radiators, which, as the name implies, are made from a composition of two metals, began to be produced more than fifty years ago in European countries. They quickly gained wide popularity due to their reliability and operational efficiency when installed in any heating system.

Which bimetallic batteries are best to choose, and what should you pay special attention to? This question always arises for all those who decided to replace old heating devices with more modern options, which are distinguished by both high performance characteristics and a respectable appearance.

Today the production of bimetallic radiators has also been established in Russia. Domestic products are quite popular, and they fully justified themselves when installed in central heating systems.

Design of bimetallic radiators

General design principles

This type of radiator consists of two main parts made of different metals.

Their inner part is made of stainless steel or, less often, copper, since these metals are highly resistant to the aggressive environment of the heated coolant. Pipes made of these materials are located vertically and horizontally, and it is through them that the coolant circulates.

The outer part of the radiators is, in fact, a casing equipped with fins, which is made of. This metal has excellent thermal conductivity and heats up quickly, giving off heat to the premises, which is why it was chosen for the outer part of the structure.

The inner and outer parts of each section of the radiator are joined together by injection molding or spot welding. The sections are assembled into a battery using steel nipples and heat-resistant rubber gaskets designed for temperatures up to 200 degrees. However, in addition to such batteries, there are also monolithic radiators made of the same materials.

The pressure test passport pressure of bimetallic batteries may vary from manufacturer to manufacturer - this indicator depends on the material of manufacture of internal pipelines and dimensional parameters. If, during the pressure testing of certain models, a test pressure of 35 atmospheres was created, then they will be able to withstand water shocks, during which pressure drops reach 25 ÷ 30. This allows the use of such radiators in central heating systems, which sometimes do not differ in the stability of the coolant pressure.

Due to their high thermal conductivity, bimetallic devices turned out to be even more effective than the familiar cast iron batteries.

In appearance, bimetallic radiators practically do not differ from aluminum models. However, they can be distinguished by their weight, since because of the steel tube "core", bimetallic batteries are heavier than aluminum ones, by about 50%. In order not to make a mistake when choosing, you should definitely study the certificate of conformity and other accompanying technical documentation, which must be attached to the batches of products, and is located at the seller of a specialized store.

Bimetallic and semi-bimetallic radiators

In addition to bimetallic, semi-metal radiators are also produced. You need to know how they differ from each other, and which one is better.

• Bimetallic devices

In real bimetallic radiators, only the outer casing of the device is made of aluminum.

The process of their production consists in the fact that the finished completely steel cores, laid in special forms, are poured under pressure with aluminum, which conducts heat well, but is not resistant to aggressive media and high coolant temperatures. In bimetallic versions, aluminum does not come into contact with the liquid medium in any way and serves only as a heat exchanger. A design made according to this principle is ideal for installation in both central and autonomous heating systems.

In some models, the core is made of copper, not stainless steel - such batteries are usually used for installation only in an autonomous heating system, where special antifreezes are used as a coolant. Steel pipes, even stainless ones, do not "behave" so adequately with some of these antifreezes.

Water is not the only possible type of heat carrier

To dust the circuits of an autonomous heating system, in addition to water, other liquids are also used - this may be due to the peculiarities of the operation of the system or requirements from the boiler equipment. More about - in a special publication of our portal.

• Semi-metallic batteries

For semi-metallic radiators, the inner channels are made of different metals. So, vertical pipes can be stainless steel, and horizontal ones - aluminum, as in conventional aluminum radiators. The opposite option also happens. In a word, they do not "pull" on full-fledged bimetallic ones.

This type of battery is not suitable for central heating, since the coolant there is often not of high quality and it is fashionable to contain a sufficiently high concentration of alkali. In contact with aluminum, such a composition can cause corrosive processes, which, among other things, will "capture" steel elements installed in combination with aluminum. In addition, the differing thermal expansion of these metals can even lead to displacement of elements when exposed to extremely high temperatures, which is fraught with leaks and even more serious accidents.

Such radiators are often confused with bimetallic ones - outwardly they are generally indistinguishable. Not really versed in the intricacies, they are often preferred because of the more affordable cost. However, as can be seen from the description, they differ quite significantly in their reliability.

As a last resort, a semi-metallic version of the radiator can be installed in a stand-alone system. But nevertheless, if it is decided to make the heating of a house or apartment as reliable as possible, then it is better to refuse from semi-metallic radiators, and opt for real bimetallic samples. Be sure to consider this when buying.

Monolithic or sectional bimetallic radiators

As already noted, collapsible bimetallic radiators are produced, which consist of sections fastened together with nipples, and monolithic non-collapsible ones.

In the sectional version, each of the sections inside the horizontal pipe sections has a multidirectional thread on both sides, intended for screwing in connecting nipples with sealing gaskets.

This design is the main significant disadvantage of sectional batteries, since these joints can be damaged from, for example, a poor-quality coolant, which significantly reduces their service life until the next preventive intervention. In addition, leaks often occur at the connections of the elements, under the influence of high temperatures and high pressure in the system.

To avoid these unpleasant moments, another technology for the production of bimetallic radiators was thought out. It consists in the fact that first, a one-piece welded copper or steel collector is made, which is placed in a special shape and poured with aluminum under pressure. These bimetallic batteries are called monolithic.

Both types have their own advantages and "vulnerabilities".

The lack of a collapsible circuit has already been mentioned. And the main advantage of such batteries is that if one of the sections is damaged, you will not have to completely change the whole, since it is quite enough to make a bulkhead - to replace or simply remove only the failed element.

In the event of any leakage in a monolithic radiator, it remains only - they have practically no maintainability.

Selective comparative characteristics of radiators of both types are shown in the table:

Cost is often the decisive criterion. The fact is that the monolithic type of radiators has a higher price than the sectional type, and this difference can be up to 20%.

When using monolithic bimetallic batteries, it will not be possible to vary the total thermal power - to reduce or increase the number of sections. Therefore, before purchasing them, you must carefully calculate what power is needed to heat a particular room. Choosing the right option is not difficult, since monolithic bimetallic radiators are produced in different sizes, both in length and in height.

When choosing between sectional and monolithic batteries, the features of the heating system should also be taken into account. For example, if they are planned to be installed in an apartment of a high-rise building, then it is better to choose a monolithic type of devices, since the pressure in the heating system of high-rise buildings is often quite high, water hammer is not excluded. and the connectors of the sectional batteries may not withstand it and give leaks.

Selection criteria for bimetallic radiators

When choosing a specific model, in addition to the characteristics already mentioned above, other points follow that will directly affect the quality of operation of heat exchange devices and the duration of their operation.

• The design of the radiator must withstand water hammer and high pressure. This is especially important to consider when installing them in a central heating system. Be sure to pay attention to the test pressure indicator.
• The battery material must be inert to the aggressive environment of a poor-quality coolant with an increased level of alkali or acidity. This factor also mainly concerns batteries installed in multi-storey buildings.
• The material of manufacture must also resist the occurrence of electrochemical corrosion.

• Radiators must be resistant to mechanical stress, that is, their outer casing must have sufficient strength. To check the quality of the aluminum (aluminum alloy) used, try to bend the rib with your fingers. In a poor-quality product, the ribs bend easily, and sometimes they can even crack or break.

• Internal ribbed channels should be made of one metal, and it is better if it is high quality stainless steel.
• The wall thickness of the inner pipe must be at least 3 ÷ 3.5 mm.
• An important element in the sectional design of the battery is the gaskets, since the reliability of the joints will depend on their quality and elasticity, therefore they are most often made of rubber or silicone. You can check the quality of the O-ring by bending it several times with your fingers. If the gasket is rigid and inelastic, then it will obviously not last long.

• In the sectional radiator, high-quality steel nipples should be installed, in which the internal "antennae" will not break off when the sections are twisted and the threads will not "gobble up". The fact that the nipple is of poor quality can be recognized by the softness of the metal of manufacture.

If this element is of poor quality, then when the battery is untwisted or twisted, the hooks for the key will definitely break off, and then the nipple will have to be sawed with a grinder, and then its parts must be removed from the holes in the sections.

• The width of the front part of the radiator fin should not be less than 70 mm, since if this parameter is smaller, the heat transfer from the device is significantly reduced. It is best if the section size in the section is 80 × 80 mm - such parameters are guaranteed to give high heat transfer.

Some manufacturers use a marketing ploy - they reduce the price of their products by reducing the size of the sections, which significantly reduces the total thermal power of the device. Therefore, when choosing a radiator, it is advisable to have a tape measure or a ruler in your pocket - so that you can check the optimal dimensions.

• In a high-quality battery, the thickness of the protruding ribs should be at least 1 mm.

If the thickness of the fins is less than 1 mm, then this most likely indicates an insufficient quality of the product, since the strength of the radiator casing is reduced in it, as well as the heat transfer is not so high - due to the low heat capacity of too thin heat exchange plates.

• You also need to know that if the manufacturer saves on high-quality nipples and gaskets, this means that the entire product, with a probability close to 100%, is not of high quality, and it is better to abandon it right away.
• It is not worth buying devices for which the manufacturer gives a warranty period of only 1 ÷ 2 years, despite the fact that the service life of bimetallic sectional batteries is 25-30 years, and monolithic ones - even about 50. Such a small guarantee suggests that the manufacturer himself is not confident in his products.

Advantages and disadvantages of bimetallic radiators

Positive their qualities include the following:

• Bimetallic radiators fit perfectly into modern interiors of both residential and office premises.

• This type of radiator is often available in different colors. If the desired color is not found, then self-staining is allowed. For this process, special heat-resistant paint compositions are used that can withstand temperatures up to 150 degrees.
• Smooth surfaces and rounded corners make these radiators safe enough from the point of view of the possibility of injury, and therefore suitable for installation in children's rooms.
• The advantage is a fairly long guaranteed service life, subject to the selection of high-quality radiators and their correct operation.
• Bimetallic radiators can be installed in any heating system, even with a low-quality coolant.
• This type of device, unlike other modern radiators, is capable of withstanding high intra-system pressure and temperatures up to 130 degrees.
• One of the key advantages of such batteries is their very high heat dissipation.
• Such devices, as a rule, are equipped with a thermostat, which allows you to set the desired temperature for their heating. Its correction occurs almost immediately, due to the small cross-section of the channels.
• The number of radiator sections for each specific room can be easily calculated independently using the mathematical formula that will be given below. The correct calculation will help to avoid unnecessary costs when buying radiators, their installation and further operation.

The calculation is carried out for each room separately.
Sequentially enter the requested values \u200b\u200bor mark the necessary options in the proposed lists

Indicate the area of \u200b\u200bthe room, m2

100 W per sq. m

Number of external walls

No one two three

The outer walls face:

North, Northeast, East South, Southwest, West

The position of the outer wall relative to the winter "wind rose"

Windward side Leeward side parallel to wind direction

The level of negative air temperatures in the region in the coldest week of the year

35 ° С and below from - 30 ° С to - 34 ° С from - 25 ° С to - 29 ° С from - 20 ° С to - 24 ° С from - 15 ° С to - 19 ° С from - 10 ° С up to - 14 ° С not colder than - 10 ° С

What is the degree of insulation of external walls?

External walls are not insulated Medium degree of insulation External walls have high-quality insulation

Indoor ceiling height

Up to 2.7 m 2.8 ÷ 3.0 m 3.1 ÷ 3.5 m 3.6 ÷ 4.0 m over 4.1 m

What's on the bottom?

Cold floor on the ground or above an unheated room Insulated floor on the ground or above an unheated room There is a heated room below

What's on top?

Cold attic or unheated and not insulated room Insulated attic or other room Heated room

Installed windows type

Ordinary wooden frames with double glazing Windows with a single-chamber (2 panes) glass unit Windows with a double-chamber (3 panes) glass unit or with argon filling

Number of windows in the room

Window height, m

Window width, m

Doors facing the street or balcony:

Proposed scheme for connecting heating radiators

Alleged features of the location of radiators

The radiator on the wall is installed openly The radiator is covered from above with a window sill or shelf The radiator is covered from above by a wall niche The radiator is covered from the front with a decorative screen The radiator is completely covered with a decorative casing

Indicate the power of one section of the selected radiator (when calculating for a non-separable model - leave the field blank)

Which manufacturers can you trust?

Bimetallic radiators from both foreign and domestic manufacturers are presented on the Russian market. This comparative table shows quality, field-proven models with various characteristics. Therefore, for those who are going to buy such devices, it is possible to study the basic parameters in advance, so that, going to the store, already have a certain idea.

Model	Distance between axles (mm)	Section dimensions: width × height × depth (mm)	Maximum working pressure (bar)	Thermal power of the section (Watt)	Coolant volume in section (liters)	Section weight (kg)	Maximum heat carrier temperature (° С)
"RIFAR" (Russia)
"RIFAR Forza 350"	350	415 × 90 × 80	20	136	0.18	1.36	135
RIFAR Forza 500	500	570 × 100 × 80	20	202	0.2	1.84	135
"RIFAR MONOLIT 350"	350	415 × 100 × 80	100	136	0.18	1.5	135
"RIFAR MONOLIT 500"	500	577 × 100 × 80	100	194	0.2	2/0	135
GLOBAL Radiatori (Italy)
"STYLE 350"	350	425 × 80 × 80	35	125	0.16	1.56	110
"STYLE 500"	500	575 × 80 × 80	35	168	2	1.97	110
"STYLE PLUS 350"	350	425 × 80 × 95	35	140	0.17	1.5	110
"STYLE PLUS 500"	500	575 × 80 × 95	35	185	0.19	1.94	110
ROYAL Thermo (Italy)
BiLiner Inox 500	500	574 × 80 × 87	20	171	0.2	2.0	90
BiLiner 500	500	574 × 80 × 87	20	171	0.2	2.0	90
"TENRAD" (Germany)
"TENRAD 350"	350	400 × 80 × 77	24	120	0.15	1.22	120
"TENRAD 500"	500	550 × 80 × 77	24	161	0.22	1.44	120
"GORDI" China
"Gordi 350"	350	412 × 80 × 80	30	160	0.21	1.4	110
"Gordi 500"	500	572 × 80 × 80	30	181	0.3	1.7	110
SIRA Industrie (Italy)
"Gladiator 200"	200	275 × 80 × 80	30	90	0.1	0.65	110
"Gladiator 350"	350	275 × 80 × 80	30	140	0.13	0.85	110
"Gladiator 500"	500	423 × 80 × 80	30	185	0.42	0.6	110
LLC "LITIZ" (Ukraine)
"Altermo LRB"	500	575 × 82 × 80	18	169	0.15	2.5	130
"Artermo RIO"	500	570 × 82 × 80	18	166	0.15	2	130
"GRANDINI" (Italy)

Recently, more and more often you can find bimetallic radiators, which are replacing ordinary cast-iron radiators inherited from Soviet apartments. The new options are not only more convenient, but also more beautiful. They can differ significantly in appearance and technical characteristics. However, it is possible to determine which bimetallic heating radiators are better to choose only after carrying out certain calculations. If you install batteries with a small number of sections, or an insufficient degree of heating, it will be cold in winter. Therefore, choose bimetallic radiators carefully, especially for residents of the northern regions of the country.

Basically, these types of radiators are purchased for apartments. Depending on the characteristics of the room, its dimensions and location in the house, certain batteries can be effective. The apartment owner must take into account all the indicators, otherwise the new and beautiful radiator will not be able to heat the room as efficiently as its cast-iron predecessor.

Bimetallic radiators may differ in appearance, size and connection type. One of the most popular options is considered to be a bottom-connected battery, as it has its advantages. However, it will not be able to optimally heat the room if the number of sections and the power of the radiator do not match the required indicators.

Therefore, before buying, it is necessary to carefully calculate the sections by area. It should be borne in mind that not only the power of 1 section is taken into account, but also many other indicators. This is the only way to correctly calculate the required size of the battery and buy a really effective heater.

The number of sections of bimetallic radiators depends on the power of the radiator and the area of \u200b\u200bthe room, the height of the ceilings

The width and depth of the radiator section also play a role.

Experts pay attention to the fact that a bimetallic radiator has a slightly higher heat transfer than a cast iron one. If the temperature of the coolant is 90 degrees, then the heat transfer from the bimetal will be at around 200 units, and from cast iron - 180. Thus, acquiring a new bimetallic heating battery of the same power as the previous one, you can expect greater heat transfer.

The advantage and design feature of a bimetallic radiator is that the pipes inside the radiator that come into contact with water are made of steel, and the outer shell is made of aluminum, which improves thermal penetration.

In terms of heat transfer, a bimetallic radiator can be compared in terms of efficiency only with a cast iron

The new radiator will work better anyway. The thing is that over time, the pipes become clogged, and the efficiency of the radiator decreases.

The simplest option for calculating the power of the battery would be to count the number of sections on the old heating element. If you take a new radiator with the same performance and the same dimensions, then the apartment will either be as warm as before, or even warmer.

How to choose a battery by area?

If the battery is purchased for a new room, where you will have to calculate the sections of bimetallic heating radiators by area from scratch, then one of the most important indicators to be guided by is the size of the room. For central Russia, there are special standards for the selection of heating radiators. There should be about 100 watts per 1 square meter. If we are talking about the northern regions, it is worth choosing more powerful options.

Note! But it must be borne in mind that calculating the battery solely by area may not be the best solution. Since errors are not excluded. They concern, first of all, those apartments, the dimensions of which do not meet the standards. We are talking about those rooms where the ceiling height is more than 3 meters.

In addition, when choosing a radiator, you need to pay attention to the number of windows in rooms and the degree of their insulation. If the apartment has features of location, for example, is corner, you should use correction factors when calculating the size of bimetallic heating radiators.

Please note that the heat dissipation of the room decreases depending on the characteristics of the room.

For starters, it should be borne in mind that each window in the room requires adding another 100 watts to the total. Another 200 units are added for the door. The correction factor for a corner apartment without wall insulation is 1.3.

In addition, there are special requirements when calculating indicators for different regions. For the Far North, for example, the correction factor is 1.6.

You also need to consider the location and method of installing the radiator. If it contains a decorative screen, and this option is widespread recently, then this addition will "eat" about 1/4 of the heat from the battery. Installing a niche under the windowsill takes another 7%.

It is also worth considering that the calculation of power for an apartment and a private house will be different. The first housing option is considered warmer due to the presence of common walls with neighbors. For private houses there is an additional factor of 1.5. This addition is necessary in order to compensate for heat leakage through a cold attic and uninsulated walls, which are located on each side of the house.

Heat loss scheme of a private house

It should be noted that bimetallic radiators are rarely installed in private households. This is due to the high cost of equipment. When a home owner is wondering which is better, aluminum or bimetallic, experts always recommend the latter option. They come in several types and differ in the way they are installed.

The difference between bimetallic and semi-bimetallic radiators

In both cases, several types of metal are used. Aluminum remains unchanged among them. In bimetallic radiators, only the upper part is aluminum, and the core itself is steel. The coolant is in contact exclusively with steel. This makes the battery powerful and durable and also protects against corrosion. Bimetallic radiators are made in a figured case, which increases their heat transfer performance.

The device of a standard bimetallic radiator

In rare cases, you can find such batteries not with a steel core, but with a copper one. These batteries are mainly used in heating systems with antifreeze. Steel pipes of constant influence will not be able to withstand non-freezing.

Bimetallic radiators with copper pipes and cores are suitable not only for water, but also for overflowing oil and antifreeze

A distinctive feature of semi-metallic radiators is a specific core. In the process of its manufacture, two types of metal are used. Here, only vertical elements are made of steel, and horizontal pipes are aluminum. All this allows you to significantly increase the heat transfer. Moreover, aluminum batteries are cheaper.

Nevertheless, this version of the heater also has several disadvantages. The main thing to note here is the rapid failure of the radiator elements. These are situations where water with a high alkali content is used. Such risks are relevant for apartments with central heating. Therefore, it is better to install aluminum semi-metal radiators in private houses equipped with an autonomous heating system. Here the equipment will last a long time and will not require constant repair or replacement.

It is especially important to choose the right radiators for apartments located in buildings where the central heating system is under heavy load. The battery must be of high quality, capable of withstanding high water pressure, characterized by sharp drops.

The difference in the heat transfer materials of heating radiators

Sectional or monolithic?

The technical characteristics of bimetallic radiators can vary significantly. Therefore, it is important before buying to clarify all the details that relate to the heating element. Some time ago, only sectional batteries could be found on sale, but now the buyer has the opportunity to purchase monolithic products that have a number of advantages.

The fact is that the presence of separate sections in the battery implies joints. It is a weak point that is prone to corrosion. It is obvious that the service life of sectional radiators due to the presence of such a "bottleneck" is less than that of monolithic counterparts.

Monolithic bimetallic radiators collect less dust and corrosion

The new technology makes it possible to create batteries from a solid steel or copper collector. A kind of aluminum case is put on top of it. Such radiators are called monolithic, and they are considered more hardy, safer and more durable.

The average service life of monolithic products is 50 years, and of sectional ones - only 25. The operating pressure of a monolithic radiator can reach 100 bar, while for sectional batteries this figure is 3 times lower. The only characteristic that will be the same for each type of radiator is the heat output. It averages 100-200 watts.

Another distinguishing feature is cost. Monolithic radiators last much longer, but they are also more expensive than sectional ones. From the disadvantages of solid models, one can also highlight the inability to add or remove sections. Therefore, when buying such a bimetallic radiator, it is necessary to carefully select it in all parameters, including size.

Best Bimetal Battery Manufacturers

Among the leaders in the rating of bimetallic heating radiators for an apartment are not only foreign firms, but also domestic manufacturers. But still, most buyers who are wondering which batteries are best for an apartment opt \u200b\u200bfor European products. Batteries made in Italy are in great demand. It is worth mentioning the companies Syrah, Raden and Global Style. The cost of one section of batteries of these companies is at the level of 1000 rubles. The products are distinguished not only by their durability and high quality, but also by their elegant design and interesting finishes. The thermal power of 1 section is about 150 watts, and the maximum temperature that an Italian battery can withstand is 110 degrees.

Syrah bimetallic radiator models

The flow diagram of the coolant in the Radena radiator

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A bimetallic heating radiator has long been considered a novelty, but it attracts buyers with its efficiency and good heating of the room. The thing is that bimetal is a composite material consisting of several layers of metal or alloys. This greatly increases its strength and also allows more heat to be generated into the surrounding atmosphere.

Bimetallic radiators are improved models of old cast iron batteries combined with aluminum options. Good heat dissipation and attractive appearance allows such products to remain in the top sellers.

Bimetal batteries are made from a combination of two materials - steel and aluminum. The outer part of the device is covered with aluminum, the core is made of steel. During operation, the coolant comes into contact only with steel, without affecting aluminum, so the heat transfer will be good.

Many consumers are asking themselves: what are the best batteries to put in an apartment? To answer it, you need to think: what does the buyer want in the end result? Sectional radiators made of bimetal seriously compete with monolithic devices, because the latter have twice the service life and withstand high operating pressure.

Which heating radiator is better to choose for an apartment

Manufacturers from the following countries are represented on the bimetallic radiator market today:

1. Russia is famous for its good section power up to 200 watts.
2. Italy is in demand due to the build quality, reliable materials and product warranty.
3. South Korea - produces models with a copper core
4. Poland - combination of low operating pressure and copper core.
5. Germany has high operating temperatures.
6. China - promotes affordable price segment.

According to customer reviews, devices from Italy, Russia and China have shown themselves well: it is these manufacturers that are represented in our rating. It is worth noting that bimetallic data also answer the question: which devices are better for a private house.

Rating of aluminum heating radiators for an apartment

Sectional radiators for an apartment are in demand due to the possibility of choosing the number of sections, so the BM 350/80 model from Oasis opens our hit parade of the best heating radiators. This product is manufactured in China, but this does not mean that its quality can be regarded as low. On the contrary, the model has a side connection, is mounted on the wall and has a heat dissipation of 140 W. The center distance is 350 mm.

The product is perfect for home use due to its characteristics: the volume of one section is 0.19 liters, the maximum working pressure is 25 bar, and the weight of one section is 1.1 kg. The product is made in traditional white color, which is important for any interior of the apartment.

• High heat dissipation;
• Several modifications;
• Modern appearance;
• Correct form of convection outlets.

• Not found

Svyatoslav, 42 years old

After a complete renovation of the heat supply in the apartment and the installation of a new heating boiler, it was decided to buy new radiators. I used to be wary of Chinese manufacturers, but I heard a lot of good things about Oasis. I bought 10 sections of this model for a room of 12 squares: in winter it is so warm that sometimes you have to turn off the system - the batteries heat very well.

Stylish, durable and safe heater - all this about the model from Halsen. Our rating for the quality of bimetallic radiators placed it in the fifth line of the top due to the possibility of using it in multi-storey residential buildings. The battery structure consists of an aluminum body and a steel core. Water hammer is not terrible for this model due to its strength.

Expert advice

Mikhail Voronov

Specialist in the field of household appliances, electronics, construction tools, auto products, sports and recreation, beauty and health.

Before buying a radiator, you need to decide how many sections are required in a particular room. The calculation is made based on the area of \u200b\u200bthe room: for this, the area of \u200b\u200bthe room must be multiplied by 100 watts of power and divided by the power of one section of the selected manufacturer.

Halsen BM 500/100 BS is a combination of practicality and high heat dissipation of 204 watts. The working pressure is represented by an indicator of 25 bar, the center distance of this radiator, which can be installed in an apartment, is 500 mm. In this model, the volume of water in the section is 0.38 liters. The length of one section is 80 mm, which the manufacturer indicates in the name.

• Good heat dissipation;
• Compactness;
• Quality material and painting;
• Affordable cost.

• Not found.

Pavel, 37 years old

We installed this radiator from 8 sections in our kitchen. I want to say that the device is very powerful and copes with the heat transfer function perfectly. The kitchen is constantly warm, even in the most severe frosts outside the window. I liked the simple connection - we installed it together with another plumber in just a couple of hours.

Manufacturer Global is one of the most demanded brands according to the rating of manufacturers of bimetal radiators. In most stores in Russia, you can find models of this company. STYLE EXTRA 500 are robust and reliable sectional radiators with increased resistance to water hammer. They are able to withstand pressure differences even when it reaches 35 bar.

Global STYLE EXTRA with a center section of 500 mm is considered the best Italian-made radiator in Russia. The heat transfer of one section is 104 W, the maximum operating temperature reaches 104 degrees. The volume of water in one section is average - 0.21 liters. The user has the ability to connect from 1 to 20 sections.

• Workmanship;
• The ability to choose a color to order;
• 10-year warranty;
• Easy to install;
• Possibility of connecting a thermal head.

• High price.

Andrey, 30 years old

I did repairs in the whole apartment 2 odes ago, it was decided to completely replace the cast-iron batteries. I chose the manufacturer Global and their model STYLE EXTRA 500. In my region, winter can show sub-zero temperatures down to -20 degrees, so a thermal head was installed. I am not overjoyed with new radiators - it is very convenient and practical, and most importantly Italian quality.

Another representative of Italy in our rating of water heating radiators is the Sira RS Bimetal 500 model. According to the manufacturer, the RS Bimetal series is a line of premium class radiators. The main feature of the model is its interesting design. The upper part, where the air outlets are located, is made in smooth, streamlined shapes. This option is better and more reliable for an apartment, because it does not contain sharp corners.

Advice! On the modern market there are models of foreign and domestic manufacturers. Russian bimetallic radiators are in no way inferior to foreign counterparts in quality.

The Syrah company gives a 20-year warranty on the radiator, which significantly increases the buyer's interest in the model. The center distance of the section is 500 mm, the volume of water is 0.2 liters. Ready-made options are supplied assembled from 4 to 12 sections, while you can independently assemble up to 20 sections. The maximum working pressure is 40 bar.

• High quality workmanship;
• Good heat dissipation;
• Finished models are assembled in Italy;
• Stylish design.
• Guarantee.

• Not found.

Ivan, 49 years old

My wife and I were bribed by the design of this model, so it was decided to take Syra. The model looks very elegant in the bedroom and in the kitchen, streamlined shapes are pleasing to the eye. As for the quality - it is beyond praise. I would even put this radiator in first place in the rating for reliability and heat dissipation.

On the second line of efficient radiators for a country house and an apartment is the model from the Royal Thermo company - PianoForte Tower. The special design of the radiator made it possible to break it out to the leading positions of the top. A characteristic and unique feature of this radiator is its vertical design. If we were considering the top 10 bimetallic heating radiators, this product would undoubtedly take the top lines.

PianoForte Tower is a wall-mounted sectional radiator with bottom connection. It fits perfectly into modern interior design and will delight you with its work. The center-to-center distance of the sections is 500 mm, the operating temperature is 110 degrees at maximum, and the volume of water in the section is 0.21 liters. The models are presented in 18 and 22 sections and are available in white, silver and black.

• Unique design;
• Special design that allows you to place the battery vertically;
• High power - 119 watts per section;
• Good build quality.

When choosing radiators, they are usually guided by two main criteria - the heat transfer rate and what is the maximum pressure for them. These two parameters should be based on.

The radiator body has a figured-ribbed structure, which is made of aluminum alloy. Copper or steel pipes are used for the heating circuit. An average bimetallic radiator can withstand pressures up to 40 atm., But there are models in which this figure reaches 100 atm., Moreover, the coolant has a temperature of 130 degrees. Aluminum made it possible to lighten the weight of the device, while not losing the quality of heat transfer.

Bimetallic radiators can be sectional or solid. Each species has its own defenders and opponents. Some believe that the presence of sections increases the risk of breakout at the joints. In addition, the quality of the coolant can also damage the battery from the inside. Therefore, focusing on such "shortcomings" a monolithic model was developed. It has a greasy or copper collector, which is covered with an aluminum "jacket". The structural integrity significantly reduces the risk of breakout. But even one such device has its original power, while the sections can be removed or added independently.

Some models are vertically mounted so there is no need for brackets when mounting. Therefore, there is no particular hassle with installation.

Is buying money worth it?

On average, one section of bimetallic batteries costs from 400 to 900 rubles. To some, such a price may seem high, while others may be surprised at the low cost. Nevertheless, it would not hurt to know what the money has to be paid for.

Such devices have their own advantages over other types of heating elements:

1. Aesthetics. Panel type radiators look so neat and attractive that they fit perfectly into any interior, be it a residential building, apartment or office. Compact dimensions allow to occupy a minimum of useful space. You can choose almost any color or paint the sections yourself, the main thing is to choose the right paint. Besides the fact that the absence of sharp corners makes for a more attractive appearance, this is what makes such batteries safe. Therefore, they can be installed in children's rooms, because even their surface is not heated to high temperatures, which means that children will not get burned.
2. Long-term operation. Manufacturers claim that their products can last 25-30 years. For this statement to justify itself, it is worth saying that this period depends on the operating conditions. And if in a private house the moments of pressure drops can still be controlled, in an apartment building this is practically impossible. It is also important to take care of the products from the inside, for which they need to be removed. But again, in the house this issue is easier to solve.

1. Versatility. Bimetallic batteries can work with any type of heating system. Unfortunately, in modern central systems, there is no need to talk about the good quality of the coolant. And this has a destructive effect from the inside, which significantly reduces the service life. Nevertheless, bimetal is highly resistant to chemical impurities in the coolant and corrosion. This material is also capable of withstanding pressure of 35-37 atmospheres.
2. High heat transfer rate. This plus is one of the most important in the list of all the advantages of this type of battery. If a thermostat is installed on the device, it becomes possible to control the temperature. Also, such an installation allows you to save the coolant (which is especially appreciated in private houses), since it allows you to almost instantly adjust the mode due to the small section of the channels in the batteries.

1. Convenience of repair. If you install a sectional battery, then if any element breaks down, it is disconnected by means of nipples. After completing all the necessary manipulations, the old or new section is returned to its place.
2. Easy calculation. There is a formula (will be given below) that helps to calculate the number of sections for a certain cubic capacity of the room. This allows you not to overpay for extra material. And if at the very beginning there is not enough money for a full-fledged purchase, then you can buy fewer sections, and then add the radiator.
3. Convenience of improvement. And here we mean not only the ability to add or remove extra sections. Such batteries can also be painted. The main thing is to choose a paint that does not produce chemicals when heated. Otherwise, the coating can not only quickly lose its attractive appearance, but also significantly harm the health of the household.

The list of advantages of bimetallic radiators is quite wide.

But for the sake of justice, it is worth saying a few words about the weak points of these devices:

• despite the fact that manufacturers indicate that the quality of the coolant does not play a special role, in fact, bad water significantly reduces the battery life;
• since two alloys (aluminum and steel) are used to create devices, they have a different coefficient of expansion - after a few years a creak occurs and the strength of the joints decreases;
• low quality of the coolant leads to rapid clogging of steel pipes, corrosion, and a decrease in heat transfer;
• price - the cost of bimetal is higher than cast iron, aluminum or steel.

But, if we compare the number of positive and negative aspects, it becomes clear that the former really win. But everyone decides for himself.

Quantity calculation

No matter where the radiator will be installed, in a house, apartment or office, there is a formula that helps to calculate the number of batteries for a room.

Initially, you need to calculate the area of \u200b\u200beach room where the battery will be installed. To do this, the length, width and height are multiplied among themselves. You also need to know the power of the device. But this indicator is always indicated on the packages. To determine the number of sections, the formula is used - the area of \u200b\u200bthe room is X 100 and divided by the power of the radiator. For example, 20 sq.m. X 100 and divide by 180 W. The result is 11.11. It can be rounded up or down. Experts recommend making a stock and then, as a result, 12 sections will be needed. BUT! As practice shows, devices in more than 10 sections do not heat effectively. Therefore, it is better to install two batteries, but 5 sections each.

How to choose a radiator?

The primary purpose of the battery is to provide heat that will heat the room. At first glance, it may seem that choosing a radiator is quite simple. But if you walk around the house, where there are already batteries of the old type, then you can notice that they are somewhat different from each other. Starting with the number of sections and ending with the location.

In order for the thermal device to fully fulfill its purpose, it is necessary to select the correct thermal power. To do this, you need to remember the following nuances:

1. Section size. If you compare several radiators from different manufacturers, you can see that the sections may differ slightly in size. Of course, "small" batteries are compact and cheaper, but their heating efficiency is slightly higher. Therefore, it is worth choosing models in which the center distance is 0.5 m, the width is 8 cm and the depth is 9, 5 (not lower than 8 cm). By the way, the last two parameters may differ for each manufacturer, in particular, decrease.

1. Section weight. The design provides for air channels for the passage of heated air. Ideally, there should be at least 4 of them. But it is impossible to visually count their number, and this is even more so, that few buyers generally pay attention to this moment. The greater the weight of the section, the more channels there are in it, which means that the thermal power will be higher. One bimetallic element must weigh at least 1700 g.

These two criteria will help you select the batteries with the best performance.

There are some more tips to help you make the right purchase:

• the seller needs to require all certificates and quality guarantors, as well as to compare the passport indicators with those indicated on the price tag;
• the seller needs to be interested in the thermal power of the model he liked and the weight of the section, which are then double-checked with the technical passport - if the seller lied, then there is a possibility that the store is not a quality product, which means there is a high risk of buying a fake (or the person is not competent in his field );
• the minimum thermal power of a bimetallic radiator must be 170 W, otherwise you will need to buy additional sections;
• it is important to clarify the service life for each element, and not just for the radiator - it is best to go to the manufacturer's website before going to the store and study the information there.

The place of purchase must be verified. Of course, everyone wants to save money, but these savings can affect the quality of the product. And then it will be difficult for anyone to make claims without a check and a warranty salon.

Review of popular manufacturers

The modern market for heating equipment is full of various companies. Some are more expensive and others are cheaper. Little-known manufacturers always have difficulties in selling, because there are few reviews of their products, which leads to a low level of trust from buyers. But as practice shows, not always a little-known company offers bad things.

However, there are a number of manufacturers that are in high demand among consumers:

1. Italy. Some of the most popular brands are Sira, Global Style and Radena. Such devices are distinguished by high-quality and neat finishing, aesthetic appearance, low weight and dimensions. Manufacturers give a guarantee up to 20 years. The power indicator of the sections goes from 120 to 185 W. The maximum temperature of the coolant is 110 degrees. Working pressure indicator - 35 atmospheres. Radena radiators are characterized by increased durability, where each section is interconnected by paronite gaskets and steel nipples. The inner frame is made of carbon steel. The cost of one section of such firms varies from 700 to 1500 rubles.

1. Russia. Initially, domestic manufacturers were famous for not very high-quality bimetallic radiators. But over time, they have perfected their capabilities, which is why Rifar batteries appeared on the market. The main lineup is represented by Base 200 (350) (500), Base Ventil 200 (350) (500), Monolit 350 (500) and Monolit Ventil 350 (500). Heat output - from 100 to 200 W, working pressure - up to 20 bar. The maximum temperature indicator of the coolant is 135 degrees. This company has a line of MONOLIT. Here the devices have more powerful characteristics: operating pressure - up to 150 bar, thermal power - 134-196 W, maximum coolant temperature - 135 degrees. Unlike the previous version, here the price per section is in the range of 500-900 rubles.
2. Forza. This option has proven itself well in central systems. All unfavorable conditions of service of radiators in domestic apartment buildings are taken into account here. There are models where the center distance is 200 and 350mm. Such radiators work easily in conditions with height differences at the installation points. There is also a closed back wall, so the appliances can be used in conjunction with French windows. But there is a requirement here - only water that meets the rules of technical operation can be used as a coolant. According to the manufacturer, Forza radiators can last 25 years. The average cost of one section is from 700 rubles.

1. MARS. This is a representative of a South Korean firm. There is a copper core at the base. The maximum indicator of the coolant is 130 degrees, the heat transfer is 167 W, the operating pressure is up to 20 bar. Despite the fact that this is an imported manufacturer, these models are adapted for specific operating conditions in domestic heating systems. The price of one section is 400 rubles.
2. REGULUS-system. This is Japan. There is also a copper core. The operating pressure is 15 bar, the maximum heating of the coolant is allowed up to 110 degrees. The manufacturer gives a 25-year warranty. The average price per section is 1000 rubles.

1. Global. An Italian company that has been on the market for several years. Style 350 (500), Style Plus 350 (500), Style Extra 350 (500) are the most popular models. These are ready-made radiators with an even number of sections - from 4 to 14. Products are produced in white. The company gives a guarantee from 10 to 20 years, depending on the model you like. The maximum temperature of the coolant is 110 degrees, the operating pressure is 35 bar. The average price of one section is 800 rubles.

There are many companies on the market, and each has its own technical characteristics. To make the right purchase, it would not hurt first to ask about the future "working conditions" for the battery. Indeed, if the system does not have a high-quality coolant or there are constant pressure drops, then it is better to buy a more expensive product. Yes, you will have to spend money for this, but then you will not need to think about repairing the battery or replacing it.