Bimetallic heating radiators characteristics, heat transfer, types, installation features

Advantages of bimetallic heating radiators

The popularity of batteries of this variety is explained very simply. Cast iron radiators are quite reliable, but do not look too aesthetically pleasing. In addition, they are difficult to install. Aluminum batteries look modern and attractive. However, this metal does not tolerate contact with oxygen in the coolant very well. Therefore, aluminum radiators quickly fail and begin to leak. Steel batteries last longer. However, at the same time, they do not look so aesthetically pleasing.

Bimetal models combine the advantages of aluminum and steel radiators. In a modern interior, such batteries fit just perfectly. The sections are made of aluminium. At the same time, they serve for a long time, since the pipes through which the coolant flows through them are made of steel.

Battery dimensions

The dimensions of the device matter, because with the necessary power parameters, it must fit in a niche under the window. What sizes can bimetallic batteries have?

Bimetallic heating radiators are characterized by standard height dimensions. The device has a marking that indicates the center distance of the device - 200, 350 or 500 mm.

Important! When choosing a radiator, it must be taken into account that the center distance is the gap between the inlet and outlet holes of the battery, which does not correspond to the entire height of the case. To find out the real height of the device, you need to add 80 mm to the value of the center distance

The total height of the device with different markings:

• marking 200 - real height 280 mm;
• 350 - device height 430 mm;
• 500 - height 580 mm.

The width of the heating device will depend on the number of sections, which is calculated based on the parameters of the room and the power of a separate section.

Attention! When choosing the size of the radiator, do not forget that, in accordance with technical standards, the device must be installed at a distance of at least 10 cm from the windowsill and 6 cm from the floor

The best bimetallic radiators with a center distance of 500 mm

The choice of heating equipment with a center distance of 500 mm for the rating is not accidental. The vast majority of modern residential premises have sufficiently large window openings, and the distance between the window sill and the floor is, as a rule, at least 60 cm. Therefore, bimetallic radiators of this qualification are most popular among the population.

Royal Thermo Piano Forte 500

A lot of positive user ratings for this Italian radiator on Yandex.Market, which fully confirm the reliability of the design, long service life, original design, puts it in first place in the rating.

• heat transfer from 740 W to 2590 W (depending on the number of sections);
• the number of sections varies from 4 to 14;
• Power Shift technology that increases heat transfer;
• steel collectors are designed for pressure surges in the system up to 30 atmospheres;
• resistant to the most aggressive coolants;
• wall and floor mounting possible;
• original design;
• manufacturer's warranty - 10 years.

rather high cost.

In general, as the British say, we are not rich enough to buy cheap things. Therefore, in this case, the price corresponds to the quality. Particular emphasis is placed on the presence of Power Shift technology - the presence of additional ribs on the vertical collector, which significantly increase the heat transfer of the model. In addition, in addition to the basic white and black colors, the buyer can order other tones or RAL palettes.

Rifar Monolit 500

Domestic development, deservedly taking second place in the rating in terms of the number of collected laudatory reviews in its direction. The features include the technology of the same name used in the production process - the sections are connected using contact-butt welding.

• a monolithic design that allows operation in the most severe conditions;
• heat transfer from 784 W to 2744 W;
• complete set of sections - from 4 to 14;
• high resistance to aggressive coolants (pH 7 - 9);
• there is a bottom connection;
• manufacturer's warranty - 25 years.

• expensive for a domestic product;
• there are no odd sections - for example, 5 or 7.

However, in general, the radiator of this model collects extremely positive reviews. Moreover, management companies strongly recommend it for use, due to the high resistance of the model to corrosion and a long guaranteed service life.

Global Style Plus 500

Once again, the Italian model, who has collected a significant number of admiring reviews addressed to her. The inside of the radiator is made of alloy steel, while the outside is coated with aluminum alloy.

• high strength;
• maximum working pressure 35 atmospheres;
• crimping pressure - 5.25 MPa;
• heat transfer in the range from 740 W to 2590 W;
• equipment - from 4 to 14 sections;
• pH value (aggressiveness of the coolant) - from 6.5 to 8.5;
• manufacturer's warranty - 10 years.

heat transfer decreases slightly with a decrease in the temperature of the coolant.

Satisfied with the purchase, the owners shower this model with extremely positive assessments - high resistance to pressure drops in the system, the presence of silicone gaskets between the sectional joints prevent leaks, adjustment works stably, and so on.

Sira RS Bimetal 500

Another Italian, appreciated by the domestic user, as the reviews speak eloquently.

• high strength - working pressure up to 40 bar;
• heat transfer from 804 W to 2412 W;
• equipment - from 4 to 12 sections;
• coolant resistance is expressed in pH - from 7.5 to 8.5;
• manufacturer's warranty - 20 years.

Well, that's what premium class is for! In addition to satisfactory assessments regarding the technical characteristics of this radiator model, satisfied with the purchase, the owners note the unique design - smooth, curved shapes, the complete absence of sharp corners.

Fondital Alustal 500/100

Also, the Italian miracle of engineering, which won the approval of Russian users, which was reflected in the number of positive reviews.

• heat transfer from 191 W to 2674 W;
• equipment from 1 to 14 sections;
• high strength - working pressure up to 40 bar;
• the most aggressive coolants are not afraid (pH 7 - 10);
• manufacturer's warranty - 20 years.

In general, a minor minus, due to the fact that this model is a continuous water chamber. On the other hand, there is an internal anti-corrosion coating, as the owners of this radiator note, and a stroke pattern that prevents the system from airing.

What you need to know about the size of radiators

Heating radiators are produced in different sizes, which allows you to choose the optimal place for their installation in the room.

An error in choosing the size of heating radiators will lead to an excessively low, or, conversely, high temperature in the heated room.

Knowing the size of heating radiators, their power and the area of ​​\u200b\u200bthe room where you are going to install them, it is easy to calculate the optimal number of necessary heaters. The choice of the height of the heating radiator depends on the intended installation location. Often, radiators are installed under the window, so to calculate the height of the heating radiator, it is necessary to measure the distance from the floor to the window sill. Also, all heaters must be at the same level. According to the height, heating radiators are divided into three types:

• standard height.
• Low radiators.
• Tall radiators.

The length of the radiator depends on the number of sections.

Dimensions of cast iron radiators

• Standard dimensions of cast iron heating radiators: section length 93 mm, depth - 140 mm, height 588 mm.
• Low heating radiators dimensions: height 388 mm, other parameters are the same.
• High cast iron radiators: height from 661 to 954 mm, section length 76 mm, depth - 203 mm.

Cast iron heating radiators can last up to 50 years without replacement

Dimensions of aluminum heating radiators

• Standard sizes of aluminum heating radiators. height 575-585 mm, section length - 80 mm, depth - 80-100 mm.
• Low: height from 200 to 400 mm, section length from 40 mm, depth up to 180 mm.
• High: height 590 mm, depth 95 mm, section length 80 mm.

Aluminum radiators have good heat dissipation

Dimensions of bimetallic heating radiators

• Standard dimensions of bimetallic heating radiators: height 550 - 580 mm, section length 80-82 mm, depth 75-100 mm.
• Low: height 30 -500 mm, section length 80 mm, depth - 95 mm.
• High: height 880 mm, section length 80 mm, depth 95 mm.

Bimetal radiators combine all the best qualities of steel and aluminum radiators

Dimensions of steel heating radiators

• Standard dimensions of sectional tubular radiators: height 600 mm, radiator length 400-3000 mm.
• Low: height 400-500 mm, radiator length 400-3000 mm
• High: height 700-900 mm, same length.

Steel radiators are most often used in individual heating systems.

Main dimensions

Dimension means:

The center distance (it is also called inter-nipple or center-to-center) should not be confused with the height of the radiator. The first indicator indicates how many centimeters are between the upper and lower collectors (holes). The height is the distance between the lowest and highest point of the section.

Aluminum heating radiators have the following dimensions:

1. The center distance ranges from 150 to 2,000 mm. Very tall radiators are rare. The most popular are radiators with an inter-nipple distance of 500 mm. This is because the existing heating network pipe system was created for cast-iron batteries, which have the same center-to-center distance. Since many owners did not have and do not have the desire to digest pipes, they simply selected / selected a suitable radiator and, thereby, raised the popularity of a battery with a center distance of 0.5 cm. This indicator is very important, and therefore manufacturers indicate it in the name of the battery (RAP-500, Rococo 790, Magica 400, etc.).
2. The height is in the range of 245-2000 mm. According to this criterion, batteries can be divided into low, medium and high. Features of each type will be discussed below.
3. The depth of the section is from 52 to 180 mm. Some models may have greater depth, however, this is rare.
4. The width of the section is 40-80 mm.

Bimetallic heating radiators which is better selection instructions

The first heating radiators made from two metals (bimetallic) appeared in Europe more than sixty years ago. Such radiators quite coped with the assigned function of maintaining a comfortable temperature in the room during the cold season. At present, the production of bimetallic radiators has been resumed in Russia, while the European market, in turn, is dominated by various aluminum alloy radiators.

Bimetal heating radiators which are better

Bimetallic radiators are a frame made of steel or copper hollow pipes (horizontal and vertical), inside which the coolant circulates. Outside, aluminum radiator plates are attached to the pipes. They are attached by spot welding or special injection molding.Each section of the radiator is connected to the other by steel nipples with heat-resistant (up to two hundred degrees) rubber gaskets.

The design of the bimetallic radiator

In Russian city apartments with centralized heating, radiators of this type perfectly withstand pressures up to 25 atmospheres (when pressure tested up to 37 atmospheres) and, due to their high heat transfer, perform their function much better than their cast-iron predecessors.

Radiator - photo

Externally, it is quite difficult to distinguish bimetallic and aluminum radiators. You can verify the correct choice only by comparing the weight of these radiators. Bimetallic because of the steel core will be heavier than its aluminum counterpart by about 60% and you will make an error-free purchase.

The device of a bimetallic radiator from the inside

The positive aspects of using bimetallic radiators

• Bimetal panel-type radiators fit perfectly into the design of any interior (residential buildings, offices, etc.), without taking up much space. The front side of the radiator can be one or both, the size and color scheme of the sections are varied (self-coloring is allowed). The absence of sharp corners and too hot panels makes aluminum radiators suitable even for children's rooms. In addition, there are models on the market that are installed vertically without the use of brackets due to the additionally present stiffeners.
• The service life of radiators made of an alloy of two metals reaches 25 years.
• Bimetal is suitable for all heating systems, including central heating. As you know, low-quality coolant in municipal heating systems adversely affects radiators, reducing their service life, however, bimetal radiators are not afraid of high acidity and poor quality of coolants due to the high corrosion resistance of steel.
• Bimetallic radiators are the standard of strength and reliability. Even if the pressure in the system reaches 35-37 atmospheres, this will not damage the batteries.
• High heat transfer is one of the main advantages of bimetal radiators.
• The regulation of the heating temperature using a thermostat occurs almost instantly due to the small cross section of the channels in the radiator. The same factor allows you to halve the amount of coolant used.
• Even if it becomes necessary to repair one of the radiator sections, thanks to the well-thought-out design of the nipples, the work will take a minimum of time and effort.
• The number of radiator sections needed to heat a room can be easily calculated mathematically. This eliminates unnecessary financial costs for the purchase, installation and operation of radiators.

The negative aspects of using bimetallic radiators

• As mentioned above, bimetallic radiators are suitable for operation with a low-quality coolant, but the latter significantly reduces the life of the radiator.
• The main disadvantage of a bimetallic battery is the different expansion coefficient for aluminum alloy and steel. After prolonged use, creaking and a decrease in the strength and durability of the radiator may occur.
• When operating radiators with low-quality coolant, steel pipes may quickly become clogged, corrosion may occur, and heat transfer may decrease.
• The contested disadvantage is the cost of bimetal radiators. It is higher than that of cast iron, steel and aluminum radiators, but considering all the advantages, the price is fully justified.

Heating radiators aluminum section dimensions

Today, in every house and apartment there are heating radiators. Cast iron radiators are widely used due to their efficiency, durability and high heat transfer coefficient. However, over time, they become clogged with rust and silt that enters the heating system through pipes.This disadvantage significantly reduces the efficiency of cast-iron radiators. It is for this reason that aluminum heating radiators have come to replace cast iron

Heating radiators aluminum section dimensions must be selected based on the following factors:

1. Room area;
2. Estimated capacity of the section;
3. Heat transfer coefficient;
4. Availability of free space for installation.

What is an aluminum radiator section?

The section (heating radiator) is a two-tube aluminum structure, which is finned by convection and radiation methods to improve thermal transfer. The section is the smallest structural element of a heating radiator.

Available sizes of sections of aluminum radiators:

1. Section width - 80 mm;
2. Section height - 350, 500, 600, 700 mm;
3. Section depth - 80, 95 mm;

The working pressure of aluminum sections can reach 16 bar.

In order to choose the right size of aluminum sections, it is necessary to calculate the power of the radiator. As a rule, this value is indicated by the manufacturer on each of the available models of aluminum radiators. There is also a simple and effective formula for calculating the required number of radiator sections:

S is the area of ​​the heated room (room);

P is the power of the aluminum radiator section;

K is the number of sections;

100 - the value of 100 watts per 1 sq.m. with a standard ceiling height in the room of 2.7 meters.

When calculating and choosing the size of an aluminum radiator section, it must be taken into account that the power reserve should be at least 20%.

To date, aluminum sections of various sizes are presented by the following famous manufacturers:

Aluminum heating radiators - impeccable quality, high efficiency and versatility.

A very important topic. Especially today, when there are many varieties of radiators, and you have to make the choice yourself, since it is simply dangerous to entrust this choice to anyone. Will boiling water explode somewhere in the middle of winter! They are so light and elegant that they seem unreliable when you are not used to them. Although it's beautiful. So I study everything that is on the Internet. You have written well the calculations for the number of sections and heat transfer. Healthy. When replacing radiators, I ordered to put ball valves on all pipes. So that if anything immediately shut off the hot water. So I made sure.

Bimetallic heating radiators of which company to buy

Sira Group

A brand from sunny Italy, which many experts in this industry attribute to the founder of bimetallic equipment. Having started its victorious march around the planet at the beginning of the second half of the last century, the company by this moment has many production sites, a significant part of which are located outside the country. The brand has earned such success with consumers by offering high-tech equipment with elegant external forms and efficient heat dissipation. Orientation to the needs of people is not the only advantage of the company. Today, the brand's efforts are focused on the production of resource-saving equipment, coupled with a claim to protect and restore the environment.

Another Italian brand founded by the Fardelli brothers in 1971. At the first stages of its development, the company produced exclusively aluminum radiators. This fact is easily explained - at that time in Italy, energy resources were very expensive, and with equal consumption, aluminum radiators give 4 times more heat than cast-iron or steel batteries. However, having entered the Russian market in 1994, the company had to master the production of bimetallic radiators. The fact is that the domestic heating system is somewhat different from the Italian one. For example, the pressure of the working medium in our pipes is much higher than in European countries. The equipment of this company complies with domestic state standards.In addition, the company gives an unprecedented warranty period of operation - 25 years!

Royal Thermo

A brand that owes its origin to the merger of the English corporation "Industrial Investment Fund Ltd" with several construction companies from Italy. After a couple of successful transactions in the northern regions of Italy, the British believed in the rapid development of the real estate market and began to invest in the production of radiators for water heating. Until 1998, all brand products were aimed at meeting the needs of the domestic market. However, at the turn of the millennium, it became necessary to develop the markets of Eastern Europe and in particular Russia. Today, heating equipment adapted for difficult natural conditions is successfully implemented in the post-Soviet space. Evaluating the brand's products, experts say that the company confidently occupies a leading position in this industry in terms of price and quality ratio.

Also an Italian brand founded by Silvestro Niboli in 1970 in the province of Brescia. Naturally, the history of the brand is directly linked to its creator, who almost 50 years ago left the small production of elements for chandeliers, with the firm intention of developing and manufacturing die-cast radiators under his own brand. Today it is a dynamically developing company whose products are well known to many consumers around the world. High-quality equipment and constant production of new products, coupled with a realistic assessment of the market and its development course, make the company competitive.

Domestic brand, which began its activity in 2002. The design development of bimetallic radiators of this company was carried out together with specialists from Italy. Production equipment - machining lines, high pressure casting and so on also come from Italy. A distinctive feature of the radiators of this brand is a high heat transfer, which allows them to be installed even in large areas. In general, the company's products are an ideal combination of European quality with the vast experience of Russians in using heating equipment in climatic conditions close to extreme!

Calculation of the number of radiator sections

The thermal power of the radiator section depends on its overall dimensions. With a distance between the vertical axes of 350 mm, the parameter fluctuates in the range of 0.12-0.14 kW, with a distance of 500 mm - in the range of 0.16-0.19 kW. According to the requirements of SNiP for the middle band per 1 sq. meters of area, a thermal power of at least 0.1 kW is required.

Given this requirement, a formula is used to calculate the number of sections:

where S is the area of ​​the heated room, Q is the thermal power of the 1st section and N is the required number of sections.

For example, in a room with an area of ​​15 m 2, it is planned to install radiators with sections of thermal power of 140 W. Substituting the values ​​into the formula, we get:

N \u003d 15 m 2 * 100/140 W \u003d 10.71.

Rounding is done up. Given the standard forms, it is necessary to install a bimetallic 12-section radiator.

Important: when calculating bimetallic radiators, factors that affect heat loss inside the room are taken into account. The result obtained is increased by 10% in cases where the apartment is located on the first or last floor, in corner rooms, in rooms with large windows, with a small wall thickness (no more than 250 mm)

A more accurate calculation is obtained by determining the number of sections not for the area of ​​\u200b\u200bthe room, but for its volume. According to the requirements of SNiP, heating one cubic meter of a room requires a thermal power of 41 watts. Given these rules, get:

where V is the volume of the heated room, Q is the thermal power of the 1st section, N is the required number of sections.

For example, a calculation for a room with the same area of ​​​​15 m 2 and a ceiling height of 2.4 meters. Substituting the values ​​into the formula, we get:

N \u003d 36 m 3 * 41 / 140 W \u003d 10.54.

The increase is again carried out in the big direction. a 12-section radiator is required.

The choice of the width of the bimetallic radiator for a private house is different from the apartment. The calculation takes into account the coefficients of thermal conductivity of each material used in the construction of the roof, walls and floor.

When choosing sizes, the requirements of SNiP for battery installation should be taken into account:

• the distance from the top edge to the window sill must be at least 10 cm;
• the distance from the bottom edge to the floor should be 8-12 cm.

For high-quality space heating, it is necessary to pay attention to the choice of sizes of bimetallic radiators. The dimensions of the batteries of each manufacturer have minor differences, which are taken into account when buying.

Correct calculation will avoid mistakes.

Find out what the correct dimensions of bimetallic heating radiators should be from the video:

Dimensions of cast iron radiators

Standard Soviet batteries of this type had a height of 580 mm, a rib width of 94 mm and a thickness of 140 mm. Many owners of houses and apartments still consider such models the most reliable. Therefore, cast-iron radiators are still in demand today. Manufacturers, of course, noticed this and began to supply the market with retro-style cast-iron radiators, which have a very attractive design. If desired, for the home, you can, of course, buy such batteries. Their sizes can be different. There are low, standard and high models of this type on the market. The approximate dimensions of cast iron heating radiators of different types can be found in the table below.

Dimensions of cast iron batteries

Very often, stylish cast iron retro radiators have small legs. In this case, the height is calculated, of course, taking them into account.

Bimetallic radiators, which are better

Bimetallic radiators on the Russian market are fully certified, but they differ not only in the company and country of origin, there are small but very important nuances that you should pay attention to when buying. Price is one of the most important aspects that consumers pay attention to.

But before judging the quality of a product by its price, you should figure out what makes up the cost of a radiator.

Price is one of the most important aspects that consumers pay attention to. But before judging the quality of a product by its price, you should figure out what makes up the cost of a radiator.

The most inexpensive bimetal radiators are presented by manufacturers from China and Russia. The price of one section does not exceed four hundred rubles. The low cost is due to a simplified design, material savings in the production of goods. The working pressure of such radiators is slightly lower than analogues produced by other countries, and the appearance is not perfect.

If we compare bimetallic radiators from the price range from 400 to 600 rubles for each section, then we will meet two manufacturers from Italy (Global, Sira) and another brand from Russia - RIFAR. The radiators of these companies look more aesthetically pleasing and attractive with a coating of snow-white or cream shades. Some models are equipped with an air vent or thermostat. Mounting methods and some production nuances (center-to-center distance, equipment, etc.) are different, which do not significantly affect the performance (power) and reliability of radiators. But all of them managed to establish themselves on the positive side of satisfied customers.

The RIFAR MONOLIT special series includes models of radiators specially designed for operation at operating pressures up to one hundred atmospheres. If you need to choose a radiator not straight, but rounded, you should evaluate the quality and design of the RIFAR FLEX series.And if your choice fell on radiators with a copper core with increased resistance to corrosion, then models of such heaters are presented by PILIGRIM.

• We choose which batteries are better to put in the apartment
• Do-it-yourself installation of heating batteries
• Calculation of the number of sections of heating radiators
• Heating system - Leningradka installation, installation

Dimensions of heating radiators

The standard height of the most popular models of heaters with a center distance along the eyeliners is 500 millimeters. It was these batteries that in most cases could be seen about two decades ago in city apartments.

Cast iron radiators. A typical representative of these devices is the MS-140-500-0.9 model.

The specification for it includes the following overall dimensions of cast iron heating radiators:

• length of one section - 93 mm;
• depth - 140 millimeters;
• height - 588 millimeters.

It is not difficult to calculate the dimensions of a radiator from several sections. When the battery consists of 7-10 sections, add 1 centimeter, taking into account the thickness of the paronite gaskets. If the heating battery is to be installed in a niche, it is necessary to take into account the length of the flushing valve, since cast-iron radiators with side connections always require flushing. One section provides a heat flow of 160 watts at a temperature difference between the hot coolant and the air in the room equal to 70 degrees. The maximum working pressure is 9 atmospheres.

Aluminum radiators. For aluminum heaters on the market today, with the same interaxal spacing of the connections, there is a significant variation in the parameters (in more detail: “Dimensions of aluminum heating radiators, section volume, preliminary calculations“).

Typical are the following dimensions of aluminum heating radiators:

• the length of one section is 80 millimeters;
• depth 80-100 millimeters;
• height - 575-585 millimeters.

The heat transfer of one section directly depends on the area of ​​its fins and depth. Usually it is in the range from 180 to 200 watts. The working pressure for most models of aluminum batteries is 16 atmospheres. Heating devices are tested with a pressure one and a half times greater - this is 24 kgf / cm².

Aluminum radiators have the following feature: the volume of coolant in them is 3, and sometimes 5 times less than in cast iron products. As a result, the high speed of movement of hot water prevents silting and the formation of deposits. Bimetal radiators. The steel core in such devices in no way affects their appearance and dimensions of heating radiators, but the maximum working pressure increases significantly. Unfortunately, the increase in the strength of the bimetallic battery leads to a high cost. And the price of such a product is already inaccessible to a wide range of consumers.

Bimetallic heating radiators section dimensions are as follows:

• length 80-82 mm;
• depth - from 75 to 100 millimeters;
• height - a minimum of 550 and a maximum of 580 millimeters.

In terms of heat transfer, one bimetallic section is inferior to aluminum about 10-20 watts. The average value of the heat flux is 160-200 watts. Due to the presence of steel, the working pressure reaches 25-35 atmospheres, and during testing - 30-50 atmospheres.

When arranging the heating structure, pipes should be used that are not inferior in strength to radiators. Otherwise, the use of durable devices loses all meaning. For bimetallic radiators, only steel eyeliner is used.