Bimetal heating radiators: characteristics, heat dissipation, types, installation features

01.09.2019 House, Repair
Bimetal heating radiators: characteristics, heat dissipation, types, installation features

Heating issues are relevant in our country due to the fact that it is cold in most of its territory. For this reason, heating a living room periodically takes the thoughts of Russians. This means that we should consider this topic and tell more about bimetal heating radiators. Their technical specifications are excellent, so they are in demand among buyers. Consider them and compare with competitors.

General information

Bimetal heating radiators are very distinguished by their characteristics and therefore are currently one of the leaders in their group of products. In terms of mass, they lose only to the old classic cast-iron radiators. It can be assumed that this is because the cast iron version was extremely common at the time. Still, such batteries are reluctant to change, although the deadline has already come. This is due to the peculiarities of people's thinking and their difficult financial situation, but we will not leave the topic and talk about it.

Radiator device

Bimetal batteries are made of two metals. The inner part is made of stainless steel, and the outer part (heat exchanger) of aluminum. Vertical steel channels are pipes. They are connected by welding in their lower and upper parts to horizontal pipes of a larger diameter, which, after assembly of the battery, form collectors. The coolant circulates in this steel tube structure.

Battery sections can be equipped with a thread (coupling) for connection to each other, and can be planted for factory welding (rare). From here comes the division into two types:

  • sectional collapsible radiator;
  • one-piece integral version.

I must say that the one-piece is quite relative , because you can always add several separate sections to a non-separable battery or just connect several blocks that are considered non-separable.

Sectional bimetal radiator


Excellent bimetal radiator performance the ditch of heating forces people to choose them. They are bought for private homes, and for city apartments. A feature of a bimetallic battery is that, when compared with aluminum and steel analogues, it has a noticeable pronounced resistance to high pressure and high temperatures.

But it is worth saying that the above applies only to quality products. This means that it is worth giving preference to manufacturing companies that have long existed in the market and have been able to prove themselves excellently during this time. It is necessary to take a responsible approach to the selection of bimetal heating radiators. Technical specification is an important aspect, but other aspects matter (manufacturer, etc.).

Steel channels are incredibly high resistance to various aggressive components of the coolant system. This is especially noticeable in comparison with all-aluminum counterparts. In bimetal, an acid-base indicator (pH) of 5-11 units is allowed, and this is several times higher than the same indicator for aluminum batteries. It also makes bimetal heating radiators more popular with buyers. The characteristics of such products can be considered close to ideal. This should always be considered when choosing batteries for the home.

Long bimetal radiator

Bimetal heating radiators: specifications

I must say that bimetal has the best performance if we compare it with aluminum radiators and steel batteries. This is because aluminum is the best in terms of heat transfer, and steel - in terms of heating. Thus, the bimetallic option is the pluses of both metals and the exclusion of the minuses of each of them separately. Now you can talk about specific manufacturers to learn a little about the situation on the market and the main players in it.

White bimetal radiator

Characteristics of bimetal heating radiators " Rifar »

Rifar is our Russian manufacturer from the Orenburg region (the city of Guy). The production is modern, the line is fully automated. The batteries are an internal monolithic collector made of stainless steel, which is placed in an aluminum case.

The high quality of products is confirmed by compliance with European quality, as well as with the Russian main regulatory documents (GOST 31311-2005, TU 4935-004-41807387-10).

It is often found in multi-story residential buildings and office premises bimetal heating radiators "Rifar Monolith 500". The characteristics of these batteries are such that they are optimally suited for these purposes (high strength and full compliance with all parameters for use in domestic heating systems).

I must say that Rifar Monolit has two dimensions. The difference is the distance between the axles. About the 500 mm variant just mentioned above, now is the time to say about 350 mm. You can often find bimetallic radiators "Rifar Monolit 350" in country and private houses. The characteristics and dimensions of the radiator are such that it can be used where a battery with a height of 500 mm does not fit. This is an important feature that you need to talk about when talking about heating radiators.

Integrated bimetal radiator

Rifar Monolit 500:

  • Working pressure - 98 atm.
  • Heat transfer of one section - 196 W.
  • Maximum temperature of the heat carrier - 135 0 C.
  • The pH value is 7-8 pH.
  • The volume of the section is 0.21 liters.
  • The weight of the section is 2 kg.
  • The diameter of the inlet is 1 inch.
  • The color of the radiator is white.
  • Warranty - 50 years.

Rifar Monolit 350:

  • Working pressure - 98 atm.
  • Heat transfer of one section - 134 W.
  • Maximum temperature of the heat carrier - 135 0 C.
  • The hydrogen index is 7-8 pH.
  • The volume of the section is 0.18 liters.
  • The weight of the section is 1.5 kg.
  • The diameter of the inlet is 1 inch.
  • The color of the radiator is white.
  • Warranty is 50 years.


Sanitaria Technica Italiana has been on the market for about 30 years. Brand products meet absolutely all international quality standards and customer requirements. It should be noted that the price of brand products is very affordable.

In Russia, Italian STI radiators appeared only in 2013. But, despite this, they quickly conquered a significant part of the market in this niche. The company has not only its own modern equipment for production, but also its own technological department, in which all products undergo a three-stage strict quality control.

Let's take a closer look at the STI bimetal heating radiator. Reviews, specifications - this is the most important moment in this case, it is then that we will touch upon. Consider the parameters on the STI Grand model:

  • The working fluid temperature is 2.4 MPa.
  • The maximum temperature is 110 0 C.
  • The heat dissipation of one section is 195 W.
  • The capacity of 1 section is 0.2 liters.
  • The weight of one section is 1.8 kg.

Pay attention to the main parameter of bimetal heating radiators - heat transfer characteristic. It is worth emphasizing that the Italian version of the heat transfer of one section is 195 watts, and in our domestic version of the above option, the similar parameter is 196 watts. Does this mean that these are the same indicators? To find the answer to this question, you need to look at the reviews.

Reviews say that STI radiators are better at warming rooms. The difference is not so noticeable in small areas, but if we are talking about large houses, then this trifle already becomes something significant.

Rifar bimetal radiator


WARMA is a large Russian-Chinese company. The production is located in China, but the automated lines use only high-class European equipment, and quality control is carried out by Russian specialists.

The products comply with GOST 31311-2005 and other standards in the field of central heating system. WARMA bimetal batteries are suitable for installation in both private homes and apartments with centralized heating plants.

Consider the WB350 model to compare with the 350 mm bimetal heating radiator considered above. Technical characteristics of WB350:

  • Working pressure - 25 atm.
  • Heat transfer of one section - 130 W.
  • Maximum temperature of the heat carrier - 110 0 C.
  • The hydrogen index is 6-10.5 pH.
  • The volume of the section is 0.17 liters.
  • The weight of the section is 1, 45 kg.
  • The diameter of the inlet is 1 inch.
  • The color of the radiator is white.
  • Warranty is 10 years.

If you analyze the WB350 and Rifar Monolit 350, you can notice similar parameters of these bimetal heating radiators. The sizes, technical specifications are almost the same, but there are also nuances that are worth paying attention to.

Rifar’s operating pressure is noticeably higher, which means that the pressure of quality checks was also higher. The weight of the section at "Rifar" is also more than that of the Russian-Chinese competitor. From all this we can conclude that WARMA products are at least somewhat inferior in terms of quality to similar products from the Russian manufacturer Rifar.


A German company founded in 2005 year. The head office is located in the city of Dresden. Production is located in China. Here the plant is equipped with modern equipment and its own chemical-technological laboratory. We also note the availability of the most advanced metal casting systems Farm New Brass. All equipment of automated lines is made by German and Swiss companies. The production of radiators is strictly controlled by vigilant German experts.

Consider the battery parameters using the TENRAD BM 500 as an example:

  • Operating pressure - 24 atm.
  • The heat transfer of one section is 161 W.
  • The maximum heat carrier temperature is 120 0 C.
  • The hydrogen index is 5-11 pH.
  • Section volume - 0.22 liters.
  • Section weight - 1.45 kg.
  • Inlet diameter - 1 inch.
  • The color of the radiator is white.
  • Warranty - 50 years.

People respond well to the company's products. The quality of the products is beyond doubt. If you are satisfied with the price of radiators from the Tendar company, then you can safely take them, you will not be disappointed in the choice


This is an Italian company with an office, design office and testing laboratories in Italy itself, but the company’s production is located in China, and Italian experts control the production. In Russia, the manufacturer has existed on the market since 2010. It should be noted that product reviews are flattering, Rada’s radiators are well suited to work in our networks. The price of products is not too low, but this does not scare buyers. Consider the parameters of one non-standard model (radiator height 150 mm):

  • Working pressure - 25 atm.
  • Heat transfer of one section - 120 W.
  • Maximum coolant temperature - 110 0 C.
  • Hydrogen indicator - 6-10.5 pH.
  • Section volume - 0.13 liters.
  • Section weight - 1.19 kg.
  • Inlet diameter - 1 inch.
  • The color of the radiator is white.
  • Warranty - 15 years.
    Bimetal radiators of different heights


The company was established in 1970 in the city of Weston (Italy) . All these years, the company worked in the design and manufacture of heating systems. Today, a small company has grown into a powerful enterprise with several large production facilities.

The Fondital Alustal bimetal model is optimized for installation in a central heating system for common multi-storey buildings. Reviews about the company are extremely positive. Consider the parameters of Fondital Alustal:

  • Working pressure - 40 atm.
  • Heat transfer from one section - 190 W.
  • Maximum heat carrier temperature - 110 0 C.
  • The hydrogen index is 7-10 pH.
  • The volume of the section is 0.14 liters.
  • The weight of the section is 1.23 kg.
  • The diameter of the inlet is 1 inch.
  • The color of the radiator is white.
  • Warranty is 20 years.

Excellent heat dissipation is noteworthy for the small volume and weight of the section. This is not the most budget model, but it costs the money that the manufacturer asks for it.


We did not consider all the manufacturers that are present on the market, but only some that are especially in demand. But this is enough to understand a little for yourself the subtleties of choice and decide. Of course, many people prefer cheaper options, but in this situation you can’t try to save a lot, because in this case you can lose a lot in terms of quality.



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