Which bimetallic heating radiators are better? The best bimetallic radiators
10 minutes to read.
Today, the market for bimetallic radiators is represented by manufacturers from such countries as:
Russia is famous for its good total power of sections up to 200 Watts.
Italy - in demand due to the build quality, reliable materials and a very long warranty on products.
Germany is characterized by high operating temperatures and pressures.
China - represented by models with an optimal price-quality ratio.
These are the manufacturers that appear in our rating, based on customer reviews. The presented devices also answer the question: which ones are better for a private home.
| Brand | Manufacturer country | Warranty, years | Characteristics in the rating |
|---|---|---|---|
| Global | Italy | 25 | High build quality. Buyers' choice. |
| Sira Group | Italy | 20 | Better heat dissipation. Quiet operation. |
| Royal Thermo | Italy | 25 | Excellent heat dissipation. |
| Fondital | Italy | 20 | Premium segment in terms of quality and cost. |
| Rifar | Russia | 25 | The best ratio of price and quality. |
| Radena | Italy. China. | 15 | Minimum coolant volume per section. Optimal ratio prices and quality. |
| Warma | Russia. China. | 10 | Increased strength. Manufactured according to GOST. |
| Könner | Russia. China. | 15 | Increased anti-corrosion resistance of the metal and high strength. |
| Tenrad | Germany | 10 | German quality. |
| Rommer | Russia. China. | 5 | Minimum defects. Long service life. |
| Lammin | Finland. Russia. | 7 | High-quality filling and neat appearance. Very durable coating. |
| Gordi | China | 10 | Optimal price/quality ratio. |
Bimetallic heating radiators: the best companies
Radiators from Global.
The Italian company Global was founded by the Fardelli brothers in 1971, at the very beginning of the emergence of the aluminum radiator. Over almost fifty years of history, the company has gone from a small workshop to a large production plant producing not only aluminum batteries, but bimetallic radiators.
The company has its own testing laboratory, in which all raw materials entering the enterprise are subject to strict quality control. We are constantly developing new models and improving the technical and operational characteristics of existing product samples. What gives them the right to give on their products 25 year warranty!
GLOBAL sells about 20% of its products in Italy itself and exports about 80% to Western and of Eastern Europe, as well as to the CIS countries and other countries of the world. The wide distribution area of GLOBAL radiators indicates the great trust of customers in the brand.
Bimetallic radiators from Sira Group
The Sira Group, created in Italy over 50 years ago, is a pioneer in the production of bimetallic radiators. After all, the first such radiator was released in 1961, and the patent was received by this Italian company. The main office of the company is located in Italy, and production sites are located in many countries around the world. The design of Sira radiators contributes to resistance to pressure changes and high heat transfer, which makes these heaters and the entire heating system reliable. By purchasing a product from this brand you get 20 years warranty.
Royal Thermo
The creation of these radiators is carried out by Italian company. Leading scientists from Russia are working on the project together with Italian developers. Over half a century of its existence, the company has been constantly improving its products, improving their technical and operational characteristics.
The model of each collection is distinguished by unique design, patented innovative technologies, impeccable workmanship and high operational reliability. The radiators are available in three basic colors - white (Bianco Traffico), black (Noir Sable) and silver (Silver Satin).
Fondital
The Fondital company was founded by Silvestro Niboli in 1970 in the city of Weston, Italian province of Brescia, and since its inception has been engaged in the design and production of heating systems. Over its half-century history, the small enterprise has grown into a large company with several large production facilities under its own brand. Today it is a dynamically developing company, whose products are well known to many consumers around the world. High-quality equipment and the constant production of new products, coupled with a realistic assessment of the market and its development course, make the company competitive.
Rifar
The manufacturer of this equipment is the Russian company Rifar, which has reliably proven itself in the market for such products. The company gives 25 year warranty for your products. Its production facilities are located in Russia. In its work, the company constantly uses innovative technologies, introducing them into production; the development of radiators was carried out jointly with the best engineers in Italy.
Bimetallic heating devices of this company are equipped with an internal monolithic collector made of steel and housed in an aluminum housing. Batteries are produced with bottom and side connections, in three sizes.
Radena
An Italian company whose office, design bureau and testing laboratories are located in Italy, but the products themselves are manufactured again in China, at the WANGDA Group plant, under the close supervision of Italian specialists.
This brand of radiators has decent quality. The products have been presented on the Russian market since 2010, and during this time they have gained wide popularity, despite the relatively high price. This is explained by the fact that buyers are attracted by the quality and reliability of these radiators.
The center distance used is from 150 to 500 mm. Most models are perfectly suited for Russian operating conditions in a central network, under the technical guidance of Russian engineers.
Warma
A Russian-Chinese company whose production facilities are equipped with high-quality European equipment. All produced radiators comply with GOST 31311-2005. The batteries of this company are used for both autonomous and central heating systems. The steel core of these radiators is made of carbon steel - its vertical channel has a wall thickness of 2 mm and inner diameter 20 mm, and the thickness of the steel of the horizontal collector sections of the sections is 4 mm.
Könner
Radiators are made of high quality aluminum and steel. The radiator manifolds are made entirely of steel, which allows aluminum to be protected from exposure to environments that steel is resistant to. Thus, the service life and resistance to water hammer of such a radiator is much longer than that of radiators that are lightweight for the sake of economy. . KONNER radiators are distinguished by the highest quality of surface treatment and painting.
Tenrad
TENRAD Heizung und Sanitar Armaturen GmbH is a company founded in 2005 by Sebastian Tengler and Paul Radenfeld (the first three letters of the founders' surnames formed the name of the company), young employees of the Faculty of Civil Engineering of the Technical University in Dresden (Germany). A German company placing orders for production in China. All products undergo quality control; adherence to technological discipline, ensuring the highest quality of products, is guaranteed by leading specialists from TENRAD who are constantly present at the plant.
Rommer
The Rommer radiator production plant is located in Yongkang, Zhejiang Province, in eastern China. Control is carried out by an official Rommer representative, who is always at the production site and is responsible for ensuring that each radiator meets the established requirements
Lammin
The Lammin company has been operating since 1989 and initially specialized in the complex design of water radiator heating systems.
During the first 5 years the company was engaged in designing, completing and organizing installation work at large engineering facilities in Europe and Asia.
Since 2000, the accumulated experience and increased financial capabilities have allowed the company to invest in production workshops and laboratories for the creation of an engineering office. Even at the beginning of their activities, specialists from our engineering bureau took part in the development of heating equipment for several brands, which to this day are considered the premium segment and are in wide demand in the markets of Europe and Asia.
Today Lammin is high tech aimed at developing all possible complex equipment, automatic and semi-automatic production lines and machines for various fields of activity.
Gordi
Gordi radiators are manufactured in China. Available in two versions - bimetallic (steel plus aluminum) and all-aluminum. The entire model range belongs to the middle price segment.
What are the best bimetallic heating radiators to buy?
The most popular and purchased radiators in our country are heating devices with center distance 500mm. It is in this category that our rating is compiled. best batteries heating.
One of the best bimetallic radiators made in Italy. Certified quality, with maximum heat transfer. We definitely recommend purchasing.
Advantages:
The inner part, which is in direct contact with water, is made entirely of steel, and the outer layer is made of aluminum
Working pressure up to 3.5 MPa (35 atm)
Pressure during hydraulic tests up to 5.25 MPa (52.5 atm)
Destructive pressure over 6.2 MPa (62 atm)
Flaws:
They heat poorly if the temperature of the coolant (water in the radiators) is less than 100 degrees, compared to panel radiators.
Italian premium quality. The unusual rounded design will not leave anyone indifferent.
Advantages:
Withstands sudden changes in pressure and temperature that often occur in our heating networks.
High heat transfer rate of 1 section - 199 W
20 year warranty
Working pressure - 40 Bar
Coolant temperature up to 110°C
Flaws:
High price
The top three is also completed by a purebred Italian with an extraordinary design.
Advantages:
Absolute brand guarantee of 25 years
Additional fins on vertical collector sections increases the heat transfer of the radiator by 5%
The unique design of the device with an asymmetrical arrangement of sections provides the 3D Heating effect, increasing the heat transfer of the radiator by 5% due to front convective windows
The use of only all-steel manifolds guarantees reliable operation in systems subject to water hammer and with chemically aggressive coolants
Ultra-resistant 7-stage NANO painting TECNOFIRMA®
Flaws:
High price
And again the Italian with his innovative technology- can be used in mixed systems heating systems consisting of various structural materials, both in residential, industrial and public buildings.
Advantages:
Good heat dissipation of 1 section 191 W
20 year warranty
Working pressure 40 bar
Can be used with different coolants
Radiators made in Russia. The sections are connected using innovative domestic technology of flash-butt welding.
Advantages:
Suitable for use in aggressive environments
25 year warranty
No center joints
Operating coolant pressure - up to 30 atm
Flaws:
Serially produced from 4 to 14 sections, without an even number of 5 and 7 sections
high price range for domestic producers
Radiators jointly produced in Italy and China. Full bimetallic heating radiators with a carbon steel frame.
Advantages:
Increased strength and reliability
Coolant temperature up to 110°C
Low cost
Flaws:
Working pressure up to 25 atm
Advantages:
Absolute 15 year guarantee
Increased power, POWERSHIFT technology.
New generation all-steel manifold
Maximum operating pressure up to 30 Bar
Relatively low cost
Flaws:
Weak heat dissipation of 1 section 168 W
One of the most powerful among bimetallic radiators, which makes it a priority when choosing radiators for heating large and poorly insulated rooms.
Advantages:
Excellent heat dissipation of 1 section 197 W
Coolant temperature up to 135°C
Increased corrosion resistance
Flaws:
It is allowed to use only specially prepared water
The model was developed by leading engineers of the Russian Federation, which guarantees reliability, durability and high thermal conductivity.
Advantages:
All steel manifold
No sharp corners or edges
Flaws:
Working pressure up to 20 bar
Low heat dissipation section 143 W
Advantages:
Low affordable price
Maximum operating pressure 25 Bar
High heat output of 1 section 180 W
Maximum operating coolant temperature 110°C
Made from high quality aluminum and steel.
Advantages:
All steel manifold
High quality assembly and painting
High heat output of 1 section 190 W
Operating pressure up to 30 bar
Full bimetallic heating radiators, the design of which eliminates contact of the shell metal with the coolant.
Advantages:
All steel core, heat dissipating jacket
Can be used in low temperature networks
Operating pressure 24 bar
Maximum coolant temperature 120°C
Anton Tsugunov
Reading time: 6 minutes
Among different types of batteries, bimetallic radiators occupy a special place. The combination of the positive characteristics of two metals - aluminum and steel - allows you to achieve outstanding strength and heat transfer. Let's look at the design and features of these devices and get acquainted with the rules for selecting and connecting bimetallic batteries.
Design and properties of a bimetallic radiator
Bimetallic radiators have a combined structure - their internal part, in contact with the coolant, is made of steel; the outer part, responsible for the quality of heat transfer, is made of aluminum. This distribution of materials allows you to make the most of the positive qualities of both metals, neutralizing their disadvantages.
From aluminum, bimetallic heating radiators received:
- high thermal inertness;
- excellent heat dissipation;
- quick response to battery temperature regulation.
The steel core gives the batteries the following characteristics:
- resistance to pressure drops and water hammer;
- resistance to electrochemical influences;
- undemanding to the quality of the coolant;
- durability.
Available number of sections – from 4 to 14, effective work with coolant up to 135 °C, withstand pressure up to 100 atmospheres. A well-thought-out logistics system, cooperation with reliable suppliers and partners, as well as warranty and insurance directly from the manufacturer make the STOUT brand the best choice.
Advice: since the exterior is bimetallic sectional radiator practically indistinguishable from aluminum, you can understand which radiator is in front of you, first of all, by weight. A bimetallic device with a steel core is much heavier than its aluminum counterpart.
Possible problems during operation
Bimetal devices have a large number of advantages. Which of their features can be considered disadvantages?
- Despite the possibility of using bimetallic batteries in a system with any coolant, the low quality of the latter negatively affects the service life of the device.
- Different coefficients of expansion of the metals present in the battery design can, over time, lead to instability of heat transfer and a decrease in the strength of the device.
- The use of low-quality coolant in the system can lead to clogging of channels, corrosion, and deterioration of heat transfer.
Design features
Bimetallic batteries can have two types of designs.
- Cheaper models are distinguished by the presence of a steel core only in the vertical channels. Such radiators are sometimes called semi-bimetallic. Despite the fact that their characteristics are significantly superior to aluminum devices, they still do not have sufficient strength inherent in full-fledged bimetallic batteries.
- Real bimetallic heating devices have a solid steel frame, which is filled under pressure with an aluminum alloy during the production process.
Separately, we can mention copper-aluminum radiators, which in their characteristics surpass all existing species batteries They have excellent corrosion resistance, excellent heat dissipation and a long service life, but their high cost has prevented them from becoming widespread.
Battery sizes
The dimensions of the device are important, since with the required 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 is necessary to take 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 actual height of the device, you need to add 80 mm to the center distance.
Full height of the device with different markings:
- marking 200 – actual 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 the individual 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 window sill and 6 cm from the floor.
Calculation of the number of sections of bimetallic batteries
How many bimetal radiator sections can fully heat a room? Calculation of bimetallic radiators requires knowledge of two parameters:
- how many square meters does the room occupy?
- power of one section of the device.
According to building regulations To heat 1 square meter of living space, approximately 100 W of power is required. In order to find out the total power required for, the area value is multiplied by 100. The result obtained is divided by the power of the section of the selected radiator.
Let's find out how many sections of the device are needed for a room of 25 square meters. m. when using a bimetallic device, the power of one section of which is 170 W.
- 25 x 100 = 2500 W – required power.
- 2500: 170 =14.7 – round to 15 – we get the required number of sections.
Considering the fact that system parameters may change due to equipment wear or blockages, you can add a 20% reserve. More sections may be needed for heating corner apartment, rooms with many windows, high ceilings. For regions with harsh climates, the required number of sections will be 1.5–2 times greater.
Important! Since batteries with more than 10 sections do not heat up efficiently, it is advisable to install several radiators with fewer sections.
What to look for when choosing
Let's find out what characteristics of a bimetallic radiator you need to study when purchasing.
- Operating pressure. A bimetallic sectional radiator must withstand a constant load of 15 atmospheres; for a centralized heating system, it is better to choose a device with a maximum operating pressure.
- The rated power of the section is needed to calculate their number.
- Dimensions. For standard window sills with a height of 80 cm, a model with a center distance of 500 mm is suitable.
- Thickness of steel inlays. The thicker the walls, the stronger the device and the longer it will last.
- Price. Bimetallic radiators cost at least 20% more than aluminum ones. If the price is lower, most likely it is a low quality “semi-bimetal”.
Radiator installation
Which pipes are best suited for bimetallic batteries? Experienced craftsmen It is recommended to combine bimetallic heating radiators with reinforced polypropylene pipes. It is allowed to use steel and metal-plastic pipes on collet connections, however in this case you need to be prepared for leaks and blockages. Due to its reliability, the optimal connection method for connection is the spot welding method.
Traditionally, it is customary to place the radiator under the window strictly in the center. This allows the device to create thermal curtain, creating an obstacle to the penetration of cold air currents through the window.
What are the options for connecting a bimetallic radiator?
- Lateral or one-way connection has maximum efficiency, but only with a small number of sections (up to 12 pieces). At more sections, the area remote from the supply pipe will not warm up well.
- The bottom connection is less efficient in terms of heat transfer and is used only in the case of a specific system configuration.
- Diagonal connection is used for radiators with 12 or more sections and allows for uniform heating of the device.
The topic of this article is the installation of bimetallic heating radiators. In it I'm going to talk about what pipes to use to install the radiator, what tools you will need to replace the battery and how to do this job correctly. So, let's go.
Why
Why and when is it necessary to install bimetallic radiators?
They are useful only and exclusively in the central heating system of an apartment building or (less often) a private house connected to a heating main.
The advantages of bimetallic batteries are high heat transfer per section (on average 180-190 watts) with significant resistance to hydrostatic pressure (for domestic radiators Rifar Monolit - up to 100 atmospheres).
Rifar Monolith is a champion in tensile strength. The radiator is designed for pressure up to 100 atmospheres, and is tested at a pressure of 150 kgf/cm2.
Why high heat transfer is needed - I think there is no need to explain, but strength is necessary when the parameters of the heating system go beyond the standard values.
Let me give you a couple of examples of such situations:
- After each heating season Heating mains are tested for density. The pressure in it increases from the standard 3-7 atmospheres to 12 or more. During testing, the input valves of the elevator unit must be closed, but do not forget about the so-called human factor;
If the valves are not closed and the vents are open, the pressure in the heating circuit will equalize the pressure in the line - with quite predictable consequences for aluminum and cast iron radiators with low mechanical strength.
- Rapid filling of the circuit or an instant stop of circulation in it (for example, when the cheeks of a valve fall) means water hammer - a short-term increase in pressure at the front of the coolant flow to 25 - 40 atmospheres.
Consequences of depressurization of the heating circuit due to destruction heating device quite predictable. Usually all floors down to the bottom are flooded. It’s not hard to guess what happens when hot and dirty water floods the apartment’s decoration and household appliances (especially those connected to the network).
How
Materials
Which pipes for bimetallic radiators are best to purchase when moving a battery or changing the wiring configuration?
Metal.
More specifically?
- Water and gas pipes made of black steel or galvanized;
If a black steel pipe can be mounted on welded joints, then galvanized pipes can only be mounted on threads. The melting point of steel is 1300 - 1400 degrees, the boiling point of zinc is 900C. When electric or gas welding, the anti-corrosion coating in the seam area will inevitably evaporate, and you will get a regular steel pipe at the price of a galvanized one.
- Corrugated stainless steel pipes with compression fittings;
- Copper pipes on press fittings or socket fittings for soldering.
I vote for stainless steel with both hands. Not everyone has welding and related skills. Galvanization is deterred by labor-intensive threading and a large number of threaded connections; copper is deterred by the exorbitant price of the pipes themselves and the fittings for connecting them.
Please note that the maximum operating pressure is only achievable at room temperature. When heated to a maximum of 95 degrees, the tensile strength of a polypropylene pipe decreases to 7-9 atmospheres.
The standard parameters of a heating system powered by a heating main (up to 7 kgf/cm2 at a temperature of 40 - 95C) seem to fit within these values. However, in practice, deviations from the normal operating mode are always possible. In addition to the examples of situations I gave above in which the pressure in the circuit may differ noticeably from the standard one, scenarios are also possible in which the maximum temperature specified in SNiPs is exceeded.
Let me give you the most obvious example of such a situation. If there are a large number of complaints about the cold in apartments, during the peak of cold weather, the housing organization, in theory, should agree with the heating networks (the organization responsible for delivering thermal energy from the thermal power plant to consumers) to increase the diameter of the nozzle of the water-jet elevator.
Dismantling, delivery of the nozzle to a higher organization, boring it, return delivery and installation takes a long time.
It is impossible to stop the heating circuit during the peak of cold weather, even for a few hours: at a minimum, the access heating will be defrosted and will require a long and painful (it’s cold!) repair. Housing workers cannot ignore residents’ complaints: this risks recalculation of heating costs through the courts and loss of part of the funding.
This is why the following step is often taken as a temporary measure during the coldest few weeks of winter:
- The nozzle is removed from the elevator;
- The suction (a jumper with a return line through which part of the waste coolant is drawn into the repeated circulation cycle) is suppressed with a steel pancake.
As a result, the heating system does not receive a mixture of water from the supply and return lines, but only water from the supply. Which, for a minute, at the peak of frost comes out of the boiler room with a temperature of 150C and does not evaporate only due to excess pressure.
What will happen to polymer pipes designed for an operating temperature of 95C at 130-150 degrees?
- In the best case scenario for the apartment owner, their resource will decrease from the planned 30-50 years to several months;
- At worst, he will get a flooded room and lawsuits from neighbors on the riser.
In case of unauthorized replacement of any utility lines, the owner of the property bears responsibility for any accident. Accordingly, the renovation of apartments on the lower floors and the purchase by neighbors of a new household appliances will burden his wallet.
What size should the pipes be?
The internal diameter should correspond to the internal diameter with a minimum error (typically 20 or 25 millimeters). The narrowing of the riser will cause a drop in the temperature of the batteries of all neighbors below and above.
In addition, it is at the narrowing that scale or a wooden chip that has flown into the heating system from the heating main will get stuck (yes, yes, this has happened in my practice).
Do I need any additional fittings to install the radiator?
Typically, the wiring of a heating device includes:
- Two through radiator plugs;
Radiators are often equipped with four blind plugs and two plugs for them. This allows you to use any connection method - both one-way and two-way.
- One blind plug and one flush valve. The flusher allows you to combat siltation of the radiator: a hose is connected to it, through which water, along with the silt that interferes with circulation, is discharged into the sewer;
- A pair of ball valves or a set of a valve and a throttle or thermal head. Shut-off and throttling valves will help reduce the heat transfer of the heating device during thaws and spring;
The photo shows a throttle that allows you to regulate the heating of the heating device.
- A couple of Americans. They provide much simpler and faster dismantling compared to sweeps;
- Jumper (a piece of pipe or a long bend with a lock nut and two tees). The jumper allows the coolant circulating in the riser to pass through itself when the supply taps are completely or partially closed. If you close the valve that opens the riser through a short time offended neighbors will come to you and begin to loudly question your high moral qualities;
- On the top floor of a house with a bottom bottling (in which the heating supply and return are separated in the basement, and the risers are connected in pairs on the top floor) there is a Mayevsky tap.
Tools
What tools will it take to install a bimetallic battery yourself with dismantling the old battery?
Here are the typical contents of my suitcase:
- Gas wrench No. 2-3 for unscrewing the radiator plugs of an old radiator (usually cast iron), for tightening new plugs and, if necessary, for cutting threads;
- Gas wrench No. 1 for unscrewing and tightening locknuts and fittings;
- Plumbing flax for sealing threaded connections;
Sealing will be more reliable if you apply a little on the flax when winding. quick drying paint in any organic solvent. The paint will prevent the flax from rotting when the heating is turned off and from fading when the heating is on.
- A grinder with a cutting wheel for steel or a hacksaw for cutting pipes (if installing a radiator requires changing the hose configuration);
- Die with holder for cutting pipe threads DN 15 - DN 25 (depending on the diameter of the riser);
- Machine oil (for example, for lubricating sewing machines);
- Rough file for metal.
How
How to properly dismantle old cast iron batteries and installation of bimetallic heating radiators?
Just
Let's start with the simplest scenario: the supply lines and shut-off valves do not need to be replaced, new batteries are installed on the old leads.
Here is our procedure:
- We reset the heating riser (in a system with bottom filling - a couple of risers). You can find your risers in the basement by following the flights of stairs at the entrance to the entrances;
- We unscrew and drive the locknuts on the connections along the threads;
- We clean the threads from the old winding;
- We unscrew and thread the radiator plugs through the threads;
- Remove the radiator from the brackets;
Keep your basin ready. There will probably be some water and a lot of sludge left in the battery.
- We unscrew and remove the old radiator caps from the connections. They do not fit the threads of bimetallic batteries (32 mm versus 25);
- Screw new plugs onto the connections;
- We screw the blind plug and flush valve into the radiator, having previously wound the external threads;
Radiator plugs are often equipped with rubber or silicone gaskets. To avoid jamming such a gasket when screwing in the plug, apply a little liquid soap to the end of the outer section.
- Place the battery on the brackets;
Sometimes they have to be replaced. The easiest way to cut off old brackets is with a grinder. New ones are screwed into a plastic dowel inserted into a pre-drilled hole.
- We screw the plugs wound or equipped with gaskets into it;
- Rewind and tighten the locknuts. That's all. You can perform a test run of the riser.
Difficult
How to install a new radiator with alteration of the liner?
The key difference from the scenario described above is the need for manual threading.
This is done like this:
- The dropped riser is cut;
- At the end of the cut pipe, a file or grinder is used to chamfer it at an angle of about 20-30 degrees to its axis. The chamfer is needed as a lead-in for the die;
- The pipe is lubricated. Lubrication will avoid scuffing and reduce the force required for thread cutting;
- The die is put on the pipe with the long end of the holder and pressed against it with the maximum possible force, while simultaneously rotating clockwise. After the first thread has been cut, the die does not need to be pressed;
Hold the riser with a pipe wrench. When cutting threads, you can break the tightness of the connection between the radiator and the liner in the apartment above or below yours, or even tear off the liner altogether.
- To install a fitting (angle or tee), five threads are cut.
The technology for installing supply connections is determined by the type of pipe:
- Corrugated stainless pipe inserted into the fitting with a loosened union nut, after which it is tightened;
- The copper pipe and the inner surface of the fitting are ground, treated with flux and heated gas burner or construction hairdryer. Then a solder rod is introduced into the burner flame or into the stream of hot air, which, melting, fills the gap between the pipe and the fitting due to the capillary effect;
- Threaded fittings on galvanized or black steel pipe are assembled on plumbing linen impregnated with paint.
Conclusion
As you can see, replacing batteries is not very difficult and is quite accessible even for a beginner in the field of plumbing. The video in this article will help you learn more about it. I look forward to your comments. Good luck, comrades!
Bimetallic batteries today occupy one of the leading places in popularity. They are inferior in this position, probably, only to the usual cast iron radiators, and even then, most likely, only due to the extreme prevalence of the latter, the adherence of many consumers to established traditions, and a kind of “inertia of thinking.”
Bimetallic radiators are increasingly being chosen for installation in the heating circuit of both a private house and a city apartment, since they, unlike aluminum and steel, have a pronounced resistance to increased pressure loads and temperatures. However, when choosing these heating devices, it is very important not to run into low-quality fakes or purchase products from a manufacturer that has not yet passed the test of time. Therefore, let us consider the question formulated this way: “ bimetallic rating manufacturers” - since this selection criterion plays a far from secondary role.
It is very difficult to give an accurate assessment of all bimetallic radiators on sale. Therefore, the publication will consider only a few companies, but they have already gained indisputable authority with the quality of their products.
General information about bimetallic radiators
Before moving on to considering the products of various manufacturers, a few minutes of attention should be paid to the design of these heating devices. It’s worth figuring it out, if only so as not to purchase aluminum batteries at the cost of bimetallic ones, since they look very similar in appearance, but the performance is at a completely different level, and the difference in price is considerable.
Their outer heat exchange casing has almost the same shape and is made of the same material - aluminum. But that's where the main similarities end.
Bimetallic battery models can be divided into two parts - internal, made of steel, and external, heat-exchange, made of aluminum - hence the name. The steel vertical channels of each section consist of pipes that are connected by welding in the lower and upper parts with horizontal sections of larger diameter, which form collectors when assembling the battery. All this pipe steel structure intended for coolant circulation.
Sections can be assembled into a single battery using a threaded coupling connection, factory welding is less commonly used. Depending on the type of this connection, the battery can be sectional, collapsible, or a block one-piece design. A single block may include several (for example, 3÷4) sections, but if necessary, it is quite possible to add the required number of sections to it or assemble a battery from several such blocks.
Steel channels are much more resistant to aggressive components of the central heating system coolant than all-aluminum batteries. Therefore, the permissible acid-base indicator (pH) of the coolant can lie in an extended range, from 5 to 11 units - aluminum batteries have never even dreamed of such indicators.
The internal steel tubes are a kind of “skeleton” of the bimetallic radiator, which makes the entire structure more rigid and durable. Steel, especially if it has a protective coating, or if high-quality stainless steel is used for the manufacture of channels, is inert to corrosive processes, and the connection of such pipes can withstand increased pressure.
This type of battery has excellent heat dissipation, and this is due to the fact that steel is capable of accumulating and retaining heat when warming up, and the aluminum outer casing is sufficiently large area, due to the high thermal conductivity of this metal, effectively transfer thermal energy to the premises.
You might be interested in information on how it is calculated
Almost all modern designs bimetallic devices are equipped with additional ribs - “petals”, which form convection channels. And the more there are, the larger the heat exchange area and the higher the heat transfer from the heating device. Moreover, these elements are configured in such a way that convection currents warm air heading towards the room.
High-quality bimetallic radiators must be designed for a pressure of at least 40 bar, therefore, when choosing them, you must pay attention to this parameter Special attention. It is usually indicated as used when testing products. You shouldn’t be surprised at such a high figure - such pressure may well be caused by water hammer in the central heating system.
By the way, bimetallic radiators fully reveal their operational capabilities precisely in conditions high pressure and heating temperatures, therefore they are preferable for central heating systems. And if this type of battery is planned for an autonomous system, then you will have to install a powerful water pump in it, which will create the necessary coolant circulation pressure.
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Popular manufacturers of bimetallic radiators
The Russian market offers products from various manufacturers, both domestic and foreign, and their products differ in their characteristics and price levels. To give an idea of these parameters, a number of models of bimetallic radiators manufactured by different companies will be considered below.
And it’s worth starting with the most affordable option.
Company "WARMA"
"WARMA" is a Russian-Chinese company that produces sectional cast bimetallic radiators. Production facilities are located in China, but they are equipped with high-quality European equipment, and technical control of manufactured products is carried out by Russian specialists.
These products fully comply with GOST 31311-2005 and all other standards of the Russian central heating system.
Bimetallic batteries “WARMA” are designed for installation in autonomous circuits of private houses and high-rise apartments connected to heating plants.
WARMA BIMETALL models are produced in two versions - WB350 and WB500. They differ in the center distance and, accordingly, in some other operational parameters. The main characteristics of these batteries are summarized in the table below.
The steel core of these radiators is made of carbon steel - its vertical channel has a wall thickness of 2 mm and an internal diameter of 20 mm, and the thickness of the steel of the horizontal collector sections of the sections is 4 mm.
The manufacturer declares the following technical and operational characteristics of its products:
| Name of parameters | Radiator model “WARMA BIMETALL”, numerical parameters | |
|---|---|---|
| WB350 | WB500 | |
| Working pressure, atm. | 25 | 25 |
| Test pressure, atm. | 40 | 40 |
| 130 | 180 | |
| 110 | 110 | |
| Hydrogen index, pH | 6-10,5 | 6-10,5 |
| Section volume, l | 0.17 | 0.23 |
| Section weight, kg | 1.45 | 1.64 |
| Center distance, mm | 350 | 500 |
| Section height, mm | 410 | 560 |
| Section depth, mm | 80 | 80 |
| Section width, mm | 80 | 80 |
| 1 | 1 | |
| Radiator color | White | White |
| Guarantee | 10 years | 10 years |
To make it easier for the consumer to decide on the number of WARMA radiator sections required to heat a room of a certain area, the manufacturer provides tables indicating the recommended solution.
Model WB350 with a height of 410 mm, a depth of 80 mm and a center distance of 350 mm, made up of batteries from different quantities sections and are assembled with the following heating capabilities:
| Number of sections in the battery, pcs | Radiator width, mm | Heat dissipation from battery, W. | Room area, m² |
|---|---|---|---|
| 4 | 320 | 520 | 5÷6 |
| 5 | 400 | 650 | 6÷7 |
| 6 | 480 | 780 | 8 |
| 7 | 560 | 910 | 9 |
| 8 | 640 | 1040 | 10 |
| 9 | 720 | 1170 | 11÷12 |
| 10 | 800 | 1300 | 13 |
| 11 | 880 | 1430 | 14 |
| 12 | 960 | 1560 | 15÷16 |
The WB500 model, having a height of 560 mm, a depth of 80 mm and an interaxial distance of 500 mm, composed of a one-piece structure, also of a different number of sections, has greater heat transfer, which is:
| Number of sections in the battery, pcs. | Radiator width, mm | Heat dissipation from battery, W. | Room area, m² |
|---|---|---|---|
| 4 | 320 | 720 | 7 |
| 5 | 400 | 900 | 9 |
| 6 | 480 | 1080 | 10÷11 |
| 7 | 560 | 1260 | 12÷13 |
| 8 | 640 | 1440 | 14 |
| 9 | 720 | 1620 | 16 |
| 10 | 800 | 1800 | 18 |
| 11 | 880 | 1980 | 19÷20 |
| 12 | 960 | 2160 | 21÷22 |
In order not to return to this issue again, it should immediately be noted that this approach to determining the number of radiator sections based only on the area of the room is very approximate. It does not take into account many other features of the room and the way the batteries are installed. Therefore, in the appendix to this article we will provide a convenient universal calculator that allows you to calculate the number of sections of a radiator of any brand with high accuracy.
The cost of one section of the “WARMA” radiator is approximately 450÷500 rubles for the WB300 model, 600÷630 rubles. for model WB500. The price level, naturally, may vary somewhat in different regions of the country.
Radiators "Könner"
“Könner” - despite the clearly German-language name, a Russian company is registered under this trademark. Its products (again, completely Russian-made) are in no way inferior in quality to other European analogues, since they are designed on the basis of modern technologies and taking into account the characteristics of the regions of Russia. Könner's main production facilities are located in China.
The company began its work producing cast iron batteries about 25 years ago, but responded sensitively to market demands and launched the development and production of more than modern devices heating. Thus, already at the beginning of the 2000s, aluminum and bimetallic radiators of their own design began to arrive in Russian construction stores. For this short term The products have become quite popular due to their affordable prices and high quality.
The company's engineers, knowing the special specific conditions of the Russian central heating system, improved and adapted specifications devices whose design was taken as a basis. That is why these radiator models compare favorably with others foreign analogues. Due to their reliability, Könner radiators are suitable for installation in both central and autonomous heating systems.
Heating devices of this brand have high anti-corrosion characteristics, have good resistance to baric loads, and can easily withstand water hammer. Radiators owe their reliability to durable vertical pipes and a horizontal collector, which are made of high-alloy steel and form the backbone of the structure. Die-cast aluminum housing with a large contact area provides excellent heat dissipation.
The high quality of Könner products is confirmed by international ISO certificates and full compliance with domestic GOST 31311-2005, section “Heating Appliances”. Products from this manufacturer have repeatedly taken first place in the Russian Federation in terms of consumer demand.
The technical characteristics of these products are presented in the table:
| Name of parameters | “Könner” radiator model, numerical parameters | |
|---|---|---|
| 350 | 500 | |
| Working pressure, atm. | 30 | 30 |
| Test pressure, atm. | 44÷45 | 44÷45 |
| Heat transfer of one section, W. | 140 | 190 |
| Maximum coolant temperature, ˚С | 110 | 110 |
| Hydrogen index, pH | 7-9,5 | 7-9,5 |
| Section volume, l | 0.14 | 0.18 |
| Section weight, kg | 1.35 | 1.75 |
| Center distance, mm | 350 | 500 |
| Section height, mm | 413 | 560 |
| Section depth, mm | 80 | 80 |
| Section width, mm | 80 | 80 |
| Inlet diameter, inch | G 1" | G 1" |
| Radiator color | White | White |
| Guarantee | 15 years | 15 years |
Bimetallic radiators "Könner" go on sale in sectional and block versions. The block can include from 4 to 12 sections. The price for one section averages from 400 to 500 rubles. It is more profitable to purchase a block version - prices for a block decrease as the number of sections increases, and can even be less than 400 rubles per section.
Radiators "TENRAD"
"TENRAD" - a company producing radiators, was established in 2005 in Germany in the city of Dresden. The enterprise was organized by young talented engineers working in the design of heating systems.
Like many other companies, the production of these heating devices, due to favorable conditions on the labor market, was placed in the PRC. The TENRAD radiator manufacturing plant is equipped with its own chemical-technological laboratory, state-of-the-art metal casting complexes "Farm New Brass", robotic manipulators developed by the German company "Kuka" and body painting lines made in Switzerland. All this equipment turned a small factory into a high-tech enterprise, in no way inferior to leading European factories. The production of radiators is carried out under the watchful supervision of German technologists from the parent company TENRAD.
The walls of the TENRAD VM radiator collector on horizontal channels have a thickness of 3.6 mm, and on vertical channels - 1.8 mm. The fins, installed in three rows, create two convection gaps in the upper part of the radiator, through which heated air enters the room. Radiators are covered with high-quality paint and varnish compositions in two layers, and the outer one consists of sprayed epoxy polyester, which meets the requirements of SanPiN 2.1.2.729-99 and standards RD 52.04.186-89, establishing the hygienic safety of materials. In addition, TENRAD VM products comply with GOST 31311-2005, which confirms their adaptation to Russian systems heating.
Prices for bimetallic radiators TENRAD
bimetallic radiators TENARD
The technical characteristics of these devices are as follows:
| Name of parameters | Radiator model “TENRAD VM”, numerical parameters | |
|---|---|---|
| VM350 | VM500 | |
| Working pressure, atm. | 24 | 24 |
| Test pressure, atm. | 36 | 36 |
| Heat transfer of one section, W. | 120 | 161 |
| Maximum coolant temperature, ˚С | 120 | 120 |
| Hydrogen index, pH | 5÷11 | 5÷11 |
| Section volume, l | 0.15 | 0.22 |
| Section weight, kg | 1.22 | 1.45 |
| Center distance, mm | 350 | 500 |
| Section height, mm | 400 | 550 |
| Section depth, mm | 77 | 77 |
| Section width, mm | 80 | 80 |
| Inlet diameter, inch | G 1" | G 1" |
| Radiator color | White | White |
| Guarantee | 50 years | 50 years |
The average cost of TENRAD VM radiators is from 620 to 720 rubles per section, but can vary up or down, depending on the region of the country. You can purchase batteries already assembled into blocks of 4÷12 sections.
Bimetallic radiators “Radena”
Radena is an Italian company whose office, design bureau and testing laboratories are located in Italy, but the products themselves are manufactured again in China, at the WANGDA Group plant, under the close supervision of Italian specialists.
This brand of radiators has decent quality and good adaptation to Russian heating networks, so it’s difficult to find negative reviews about them. The products have been presented on our market since 2010, and during this time they have gained wide popularity, despite the relatively high price. This is explained by the fact that buyers are attracted by the quality and reliability of these radiators.
The model range is presented in three names - with different center distances: 150, 350 and 500 mm.
The design features of these radiators include the following:
- Self-aligning gaskets installed between sections are made of graphite, so there will be no distortions when assembling and disassembling the battery. Thanks to this it is achieved high degree sealing, and there are no leaks at the connections.
- The threads on the section connections are absolutely straight and never filled with paint.
- The ends of the radiators are perfectly cleaned and ready for installation.
- High-quality original packaging reliably protects products from damage during transportation.
This brand of radiators is one of those products that are characterized by increased thermal conductivity and durability. All manufacturing materials fully comply with European environmental standards.
This table presents the technical characteristics of different-sized Radena models:
| Name of parameters | Radena radiator model, numerical parameters | ||
|---|---|---|---|
| Bimetall CS 150 | Bimetall CS 350 | Bimetall CS 500 | |
| Working pressure, atm. | 25 | 25 | 25 |
| Test pressure, atm. | 40 | 40 | 40 |
| Heat transfer of one section, W. | 120 | 135 | 185 |
| Maximum coolant temperature,˚ C | 110 | 110 | 110 |
| Hydrogen index, pH | 6.0 ÷ 10.5 | 6.0 ÷ 10.5 | 6.0 ÷ 10.5 |
| Section volume, l | 0,1/0,13 | 0.16 | 0.22 |
| Section weight, kg | 0,88/1,19 | 1.43 | 1.85 |
| Center distance, mm | 150 | 350 | 500 |
| Section height, mm | 241 | 403 | 552 |
| Section depth, mm | 120 | 85 | 85 |
| Section width, mm | 74 | 80 | 80 |
| Inlet diameter, inch | G 1" | G 1" | G 1" |
| Radiator color | white | white | white |
| Guarantee | 15 years | 15 years | 15 years |
All surfaces of these radiators, both internal and external, undergo special anti-corrosion treatment before painting. After this, they are dipped into a bath with a colorful composition, and then dried well and subjected to a second stage, during which they are sprayed upper layer high strength epoxy coating.
The price of Radena radiators with different center distances may vary not only depending on this parameter, but also on the region where they are purchased. So, “CS150” - 420÷500 rubles; “CS350” - 600÷800 rubles; “CS500” - 645÷ 850 rubles.
Radiators "Rifar"
"Rifar" is a widely known domestic manufacturer, specializing in the production of aluminum and bimetallic batteries. Bimetallic heating devices are equipped with an internal monolithic collector made of steel and housed in an aluminum housing. Batteries are produced with bottom and side connections, in three sizes.
Production facilities are located in Russia, in the city of Gai, Orenburg region. The equipment of automated lines, from beginning to end of the entire technological chain, is at an ultra-modern level.
Heating appliances of this brand comply European quality and Russian regulatory documents GOST 31311-2005, TU 4935-004-41807387-10. This version of radiators is primarily intended for installation in multi-storey residential and administrative buildings, as they are highly durable and suitable for domestic systems heating performance characteristics.
- "Rifar Monolit" is produced in two dimensional versions - with an interaxle distance of 500 and 350 mm. Due to the fact that this Rifar model range is clearly resistant to corrosion processes, housing management companies often recommend it for installation in apartments in multi-storey buildings.
Technical and operational characteristics of Rifar Monolit radiators look like this:
| Name of parameters | Radiator model “Rifar Monolit”, numerical parameters | |
|---|---|---|
| 350 | 500 | |
| Working pressure, atm. | 98 | 98 |
| Test pressure, atm. | 148 | 148 |
| Heat transfer of one section, W. | 134 | 196 |
| Maximum coolant temperature, ˚С | 135 | 135 |
| Hydrogen index, pH | 7÷9 | 7÷9 |
| Section volume, l | 0.18 | 0.21 |
| Section weight, kg | 1.5 | 2 |
| Center distance, mm | 350 | 500 |
| Section height, mm | 415 | 577 |
| Section depth, mm | 100 | 100 |
| Section width, mm | 80 | 80 |
| Inlet diameter, inch | G 1", optional 1/2" and 3/4" | G 1", optional 1/2" and 3/4" |
| Radiator color | White | White |
| Guarantee | 50 years | 50 years |
The average price for domestic Rifar Monolit radiators is quite high and is approximately 715 - 850 rubles, but it can also vary and be different for individual regions.
- One more model line The bimetallic battery of this company is “Rifar Base Venti”. It, in turn, is divided into three options, which have an interaxle distance of 200, 350 and 500 mm.
In terms of color quality and design, the models in this series are more aesthetically pleasing than those of the Rifar Monolit, however, they are significantly inferior to them in their technical and operational characteristics. Therefore, the manufacturer gives a guarantee for these products for only 10 years, and estimates the operating period at 25 years.
Prices for bimetallic radiators Radena
Radena bimetallic radiators
It should be noted here that the manufacturer clearly warns that this battery option is more suitable for autonomous heating systems, since all indicators are designed specifically for it. For example, “Rifar Base Venti” radiators require a clean coolant, which can only be provided in an autonomous system. In addition, the test and operating pressure of these heating devices is several times lower than that of Rifar Monolit.
So, the main technical and operational characteristics of this line are as follows:
| Name of parameters | Radiator model “Rifar Base Venti, numerical parameters | ||
|---|---|---|---|
| 200 | 350 | 500 | |
| Working pressure, atm. | 20 | 20 | 20 |
| Test pressure, atm. | 30 | 30 | 30 |
| Heat transfer of one section, W. | 104 | 136 | 204 |
| Maximum coolant temperature, ˚С | 135 | 135 | 135 |
| Hydrogen index, pH | 7÷8.5 | 7÷8.5 | 7÷8.5 |
| Section volume, l | 0.16 | 0.18 | 0.2 |
| Section weight, kg | 1.02 | 1.36 | 1.92 |
| Center distance, mm | 200 | 350 | 500 |
| Section height, mm | 261 | 415 | 570 |
| Section depth, mm | 100 | 90 | 100 |
| Section width, mm | 80 | 80 | 80 |
| Inlet diameter, inch | G 1" | G 1" | G 1" |
| Radiator color | White | White | White |
| Guarantee | 10 years | 10 years | 10 years |
The cost of radiators in this line is quite high, ranging from 725 to 900 rubles per section, but can also vary.
Bimetallic radiators "Fondital"
The Fondital company was founded in 1970 in the city of Weston in the Italian province of Brescia, and since its inception it has been engaged in the design and production of heating systems. Over the years of work and constant development, the small enterprise has turned into a large company with several large production facilities. Today Fondital is one of the world leaders in the development and manufacture of devices and components for heating systems. This manufacturer mainly produces aluminum radiators as heat exchange devices, but its product range also includes a bimetallic model, which is quite popular among consumers.
The bimetallic model “Fondital” has a name that speaks for itself - “Alustal”, and is intended for installation in the central heating system of multi-storey buildings.
"Fondital-Alustal" is characterized by the following technical and operational indicators:
| Indicator name | Numeric parameter values |
|---|---|
| Working pressure, atm. | 40 |
| Test pressure, atm. | 60 |
| Heat transfer of one section, W. | 190 |
| Maximum coolant temperature, ˚С | 110 |
| Hydrogen index, pH | 7-10 |
| Section volume, l | 0.14 |
| Section weight, kg | 1.23 |
| Center distance, mm | 500 |
| Section height, mm | 559 |
| Section depth, mm | 80 |
| Section width, mm | 97 |
| Inlet diameter, inch | G 1" |
| Radiator color | White |
| Warranty from installation | 20 years |
Radiators “Fondital-Alustal” can be block-based, and the batteries offered for sale can include from 4 to 14 sections, to which additional blocks or individual sections can be added. The devices are quite expensive: average cost one section in different regions of the country is 740÷950 rubles.
The manufacturer provides a guarantee for free elimination of all types of defects in production for a period of 20 years from the date of installation. However, such a guarantee only applies if the installation is carried out by a qualified technician in compliance with all installation conditions specified by the manufacturer in the product passport.
Bimetallic radiators from the Global company
The Italian company “Global” was created in 1971 and, we can say that it was at the very origins of the development and production of aluminum radiators. Having come a long way from a small workshop where assembly was done by hand to industrial automated workshops, today the Global company produces not only aluminum versions of heating devices, but also four models of bimetallic radiators of different sizes.
The company has its own testing laboratory, in which all raw materials entering the enterprise are subject to strict quality control. We are constantly developing new models and improving the technical and operational characteristics of existing product samples. The Global company received certification for the production of radiators according to the European standards ISO 9002 and ISO 9001-2000, and in 1996, the products of this manufacturer were certified in the GOST system of the Russian Federation. Year after year, the demand for heating appliances from this company is growing, which indicates high consumer confidence in products bearing the “Global” logo.
The main characteristics of bimetallic radiators produced by the company are shown in the table:
| Name of parameters | “Global” radiator model, numerical parameters | |||
|---|---|---|---|---|
| "Style" 350/500 | "Style Extra" 350/500 | "Style Plus" 350/500 | "Sfera" 350/500 | |
| Working pressure, atm. | 35 | 35 | 35 | 35 |
| Test pressure, atm. | 52 | 52 | 52 | 52 |
| Heat transfer of one section, W. | 125/168 | 120/171 | 140/185 | 119/165 |
| Maximum coolant temperature, ˚С | 110 | 110 | 110 | 110 |
| Hydrogen index, pH | 6.5 ÷ 8 | 6.5 ÷ 8 | 6.5 ÷ 8 | 6.5 ÷ 8 |
| Section volume, l | 0,16/0,18 | 0,17/0,21 | 0,17/0,19 | 0.16÷0.20 |
| Section weight, kg | 1,50/1,87 | 1,42/1,87 | 1,50/1,94 | 1,40/1,87 |
| Center distance, mm | 500/350 | 500/350 | 500/350 | 500/350 |
| Section height, mm | 425/575 | 418/568 | 425/575 | 418/568 |
| Section depth, mm | 80 | 80 | 95 | 80 |
| Section width, mm | 80 | 80 | 80 | 80 |
| Inlet diameter, inch | G 1" | G 1" | G 1" | G 1" |
| Radiator color | 8 colors | 8 colors | 8 colors | 8 colors |
| Guarantee | 20 years | 20 years | 20 years | 20 years |
The color range of GLOBAL bimetallic radiators is wider, but the coloring of released models is often carried out at the request of consumers, and the standard color for batteries remains glossy white.
Bimetallic radiator “GLOBAL STYLE PLUS” 500 - 7 sections in basic color
All radiators undergo a two-stage painting process. The first stage involves immersing the products in a special bath and is called anaphoresis. The second stage includes spraying onto prepared surfaces coloring matter based epoxy resins with the addition of coloring pigment.
As you can see from the table above, GLOBAL produces four models of bimetallic radiators, named “Style”, “Style Extra”, “Style Plus” and “Sfera”. Each of the models is available in two versions - with center distances of 350 and 500 mm. The table also shows the difference in some parameters of radiators from this manufacturer - this makes it easier to navigate when choosing batteries for specific conditions.
Please note the warranty period is 20 years. This once again indicates that the manufacturer is completely confident in the quality of its products.
The price of GLOBAL radiators is quite high (the highest of all those discussed in this publication), but they are justified by the reliability, durability and efficiency of the devices. Thus, the average cost of one section of a heating device starts from 800 and reaches 1200 rubles. More information about the price can be found at this link
Appendix: How to independently calculate the number of sections of a bimetallic radiator
A frequently practiced method of calculation is based on 100 W of thermal energy per square meter area, does not differ in accuracy - each of the rooms has its own own characteristics, which also need to be taken into account. Therefore, we will take the liberty of offering the reader a more accurate algorithm, which is implemented in the program of the calculator located below.
Necessary comments on the calculation program
A few brief explanations on the calculations:
- On total heat loss is affected by the presence and number of walls in contact with the street, as well as their location to the cardinal points and in relation to the prevailing winter winds. The program provides appropriate fields for entering this data.
- The climatic features of the region will be taken into account when indicating minimum winter temperatures. In this case, you should indicate not abnormal, but quite normal frosts for your region in the coldest decade of winter.
- The wall insulation parameter may raise questions. Here it is better to approach it from the position that a wall is considered fully insulated if its thermal insulation was carried out in full on the basis of completed thermal calculations. There should be no uninsulated walls in residential buildings at all - no heating with this approach simply will not help: the room will still be cold, and the walls will be damp.
- The characteristics of the room, that is, its height and proximity below and above, directly affect the required amount of thermal energy to warm up the volume of the room and replenish heat loss through the ceilings.
- After entering the window parameters, the program will calculate the percentage of glazing (from the area of the room) and enter the appropriate correction factor. A similar approach is used if there are regularly opened doors to the street or an unheated balcony.
- Finally, the overall heat transfer from heating radiators is significantly influenced by the scheme of their connection to the circuit and the features of their location on the wall. All this is taken into account by the calculation algorithm.
- Attention! The program is capable of producing two total values.
— If a calculation is selected for a non-separable radiator model, then the result should be taken into account "A"- this is the required total radiator power for a given room, expressed in kilowatts.
You may be interested in information about what to consider when choosing
Prices for popular bimetallic heating radiators
— If the goal is to calculate the number of sections of a collapsible radiator, then after selecting this path an additional field will appear in which you must enter the nameplate power of one section of the selected model (in watts). The result is taken from the point "B"- this is the required number of sections, rounded up to the nearest whole number.