Bimetallic heating radiators are one of the most popular heating options for any room. Their main difference from analogs is their high thermal conductivity, durability and reliability. This was achieved by combining two metals - steel for the inner shell and aluminum for the outer one. These materials were not chosen by chance: steel is very resistant to high temperatures and corrosive environments, and aluminum heats up quickly and gives off heat well. The result is high-quality radiators with good technical characteristics, a pleasant appearance and an affordable price.
The most common bimetallic sectional radiators, consisting of several identical sections, arranged vertically. Each section consists of an aluminum casing with a steel pipe inside, into which coolant flows. In addition, at the top and bottom of all sections are connected in one design horizontal steel pipes.
There are also monolithic bimetallic radiators that do not have connecting elements (nipples). They are a single steel manifold placed in an aluminum casing. This design ensures the resistance of pipes to high pressure and hydraulic shocks, eliminates the possibility of leakage, has a long service life. However, the weight of monolithic radiators is higher, the price is also higher than that of sectional ones, and in the event of a breakdown, the battery will have to be completely replaced (while sectional counterparts need only replace the damaged section or connecting element).
Bimetal radiators are suitable for both residential and non-residential premises, they can be connected to a central and autonomous heating system. To create a comfortable temperature in the room, it is important to choose the right number of sections and know how to calculate them. The calculation of bimetallic radiators is based on the parameters of the floor space and the power of one section (it is indicated in the accompanying documentation). The following formula is used for calculation: A = B * 100 / C, where A is the number of sections, B is the area of the room, C is the power of one section of the radiator.
However, in addition to calculating the area, it is necessary to take into account the characteristics of the room, namely: the number and size of windows, the balcony (glazed or not glazed), the presence of external walls, the floor of the house, etc. Considering these factors, you should use incremental factors and multiply the result by 1 , 1, 1,2, 1,3, etc. The resulting numbers to round up.
The advantages and disadvantages of bimetal radiators
As with all types of collectors, bimetallic devices have both advantages and disadvantages. Their advantages include:
- Universality, thanks to which it is possible to mount bimetallic batteries in any house or room and connect to any heat carrier.
- The service life of sectional models is at least 20 years, and monolithic structures work up to 50 years.
- High heat dissipation ensures fast heating of the room and maintaining a comfortable temperature.
- The use of steel tubular batteries ensures resistance to high pressure and temperature.
- The weight of the radiator allows installation by one person.
You also need to take into account the fact that bimetallic models have a neat shape with rounded edges. This reduces the risk of injury when hitting the battery and adds aesthetics to the appearance of the structure.
The most famous and popular are Italian, German, Russian and Chinese companies, it is difficult to choose among them. The rating of bimetallic radiators is unanimously headed by Italian companies GLOBAL Radiatori, ROYAL Thermo, SIRA Industrie and GRANDINI. The second place is occupied by the German company TENRAD, the third - the domestic manufacturer RIFAR. The Chinese brand GORDI closes the rating of bimetal radiators of heating.
In addition to these, there are other manufacturers in the market, but these brands are the best parameters for quality and durability.
Before buying, you should carefully study your favorite model: make a visual inspection of it, try the metal on the bends and strength, study the technical characteristics shown in the accompanying documentation.
When visual inspection should pay attention to the size of the sections of the bimetallic radiator. The optimal width and depth of the sections is 80 mm, but depending on the size and type of room in which the radiator will be installed, you can choose bimetallic heating radiators with smaller parameters. The main thing is to correctly calculate the number of sections. It is more critical to approach the section thickness. In quality models, it is at least 1 mm. There are models with a thickness of 0.8 mm or less - this figure is allowed to production, but due to it the strength of the case and heat transfer is reduced. In general, the smaller the heating radiators for an apartment, the slower and weaker they heat the air, so a powerful collector must have either impressive dimensions or a sufficient number of sections.
When choosing a radiator, you need to carry out a small mechanical test: try to bend the section, check the softness of the nipple, evaluate the elasticity of the gasket. If even small chips are visible on the collector, this indicates a low quality of aluminum and it is better not to buy such radiators.
From the technical characteristics shown in the passport of the product, it is important to pay attention to the test pressure test indicator - it is responsible for the resistance of the battery to high pressure and hydraulic shocks. You also need to look at the warranty period - if it is 1-2 years, this is an occasion to think about the quality of the device.
Installation of bimetallic radiators
As mentioned above, the installation of bimetallic radiators can be made in the premises of any purpose with connection to any heating system. The installation process in the private house, in the apartment, and in the non-residential premises is the same.
At the first stage, old batteries are removed and a place for new ones is prepared. The marking for brackets is done, the position of the collector is calculated and the eyeliner is tried on. The recommended distance from the floor to the radiator is from 6 to 12 cm, from the radiator to the window sill - at least 5 cm, from the back of the collector to the wall - at least 2 cm.
At the second stage, direct installation is carried out: first, brackets are installed in the wall, then the collector itself is mounted on them. The installation is completed by connecting the radiator pipes to the pipes.
There are several schemes how to connect a bimetallic radiator to a pipe. The most common option, which is recommended to choose for an apartment, is a one-way (or side) connection scheme. In this case, the inlet pipe is connected to the upper nozzle, and the discharge pipe is connected to the lower one, and all this is on one side of the battery. With this scheme, heat loss is minimal (up to 2%).
The bottom connection scheme is different in that both pipes are located at the bottom. This option is justified with certain features of the room, but the heat loss in this case reaches 12%.
Another diagonal circuit is suitable mainly for multi-section collectors. It provides for the connection of the supply pipe at the top of the radiator on one side, and the connection of the outlet pipe at the bottom of the radiator on the other side.
After all stages of installation on the radiator opens the valve for the flow of coolant. As a rule, installation is performed by experienced professionals who have the necessary equipment. However, with the availability of technology, experience and knowledge, you can install the radiator yourself.
Use in the interior
The choice of bimetallic radiators is largely due to the fact that the size and number of sections can be varied in any way, choosing the best option for a particular room. For example, for a country house with tall windows, shorter models with a height of 40 cm are suitable: thanks to their compact dimensions, they easily fit into a limited space.
If you choose a model for a spacious living room of an ordinary apartment building, it is better to choose a collector with sections of 50-60 cm in the amount of 12-14 pieces. The exact number of sections must be calculated based on the area of the room and the technical characteristics of the radiator.
One of the advantages of bimetallic models is that they can be painted in different colors, but only with special paints. Having shown the imagination and talent of the designer, you can create an original element of the interior from a conventional battery that best suits the style of the room.
In order for the battery to serve for many years and not cause problems, it is important to correctly calculate the power of the radiator and decide which model of company is better to purchase. Before you choose bimetallic radiators, you need to examine the documentation and carefully inspect the product - in this case, the probability of buying low-quality goods is reduced. Radiators of bimetal are versatile, and therefore are perfect for any purpose.