Review of Kermi convectors and radiators, assistance in selection

Types of Kermi brand convectors

Kermi convection water heaters are produced in two main types: built-in and floor-mounted.
A special group consists of non-standard designs. The devices are united by a single operating principle. The heat exchange part receives hot water from the heating system. The heated metal transfers heat to the air. The warm air flow rises, giving way to cold masses.

The convection process promotes rapid heating of the room volume.

Steel floor

Floor-mounted heating devices are installed along wide-format windows. By generating a flow of thermal radiation, they create a screen against the penetration of cold air into the room.

A heat exchanger is located inside the galvanized steel casing. The device consists of metal pipes with fins.

Using pipes, the device is connected to the pipes of the heating system. Kermi floor convectors are made with side or bottom connections.

Floor recessed

Hidden installation convectors are distinguished by the fact that they are located flush with the floor. To do this, a recess is made in the floor covering. The niche houses the device housing with active equipment. The top of the device is covered with a decorative grille.

The devices can operate on the principle of natural or forced convection. In the second case, a fan is added to the kit to speed up the air mixing process.

Kermi built-in convectors heat the air evenly throughout the entire height of the room. There are no drafts and cold air does not accumulate under the device.

Special versions

For rooms with non-standard configurations, convectors of special shapes are manufactured to order.

For example:

• corner (for location at the junction of walls);
• radius (for rounded shapes);
• complex shape (with several bends, with a recess for a column).

To order special-design convection devices, the necessary measurements and calculations are first made.

Kinds

Buyers of Kermi radiators face a difficult choice task. The large range of indicators forces us to study the technical characteristics in more detail. The designs and size range of devices are different. Specific data is also related to the design of the units. For example, heating radiators on sale range from 40 cm to 3 meters in length, the height of the radiator is from 30 to 90 cm.

Tubular, panel, and finned options are common.

Panel steel appliances from this company come with one, two and three panels. The three-layer design is considered the most powerful. Devices are also divided into types, which are related to the number of panels. The table includes 10 to 33 product types. For example, the first is the 10th type, which includes one such part, the 11th type includes an addition in the form of ribbing, the 12th type - thin batteries 6.5 cm wide, the 22nd type - two panels and double ribbing. Type 30 and above include batteries with three rows and triple fins.

Batteries with a corrugated surface belong to the Profil category, and smooth radiators with a flat front panel are called Plan. In the group of smooth devices there are also various options that differ in characteristics and markings.

Plan-V options are designated FKO - these are radiators with a lower supply option, known to customers in the following three types:

• left-handed;
• right-sided;
• centered.

Plan-K models marked FKV are distinguished by lateral inlet.

The association includes suitable options for replacing old cast iron radiators with a distance between the axes from 50 to 90 cm. If the pipes are in normal condition, replacing them with these devices does not require their digestion.

Another unusual option is Verteo Plan.

This vertical type product is needed in cases where installing a horizontal version of the required power is impossible. FTV radiators are newer models that replaced the FKV variants. The models are equipped with a bottom connection option and allow the installation of a hidden pipe system. Communications for these products can be placed under the floor base. The radiators are distinguished by a two-layer varnish coating. Treatment inside and outside protects products from corrosive destruction.

The line includes a wide range of mounting sizes. Radiators of this type are easy to install. These radiators successfully combine excellent design and functionality of the devices. The models are characterized by high performance. The heat transfer of steel radiators mounted in the wall is comparable to bimetallic options. Replacing energy-consuming options with cost-effective batteries is easy and simple. It is enough to make the necessary calculations.

What to do after the calculation

After calculating the power of heating radiators for all rooms, it will be necessary to select a pipeline by diameter and taps. Number of radiators, length of pipes, number of taps for radiators. Calculate the volume of the entire system and select a suitable boiler for it.

For humans, home is often associated with warmth and comfort.

And in order for the house to be warm, it is necessary to pay due attention to its heating system. Modern manufacturers use the latest technologies to produce various elements of heating systems

However, without proper planning of such a system, these technologies may be useless for certain premises.

Steel panel radiators are a competitor to conventional sectional heating devices. They are attractive because, compared to all sectional models, with smaller dimensions, they have a higher heat transfer coefficient. They consist of panels in which the coolant moves along formed passages. There can be several panels: one, two or three. The second component is corrugated metal plates, which are called fins. It is due to these plates that a high level of heat transfer from these devices is achieved.

To obtain different thermal power, panels and fins are combined in several options. Each option has different power. To choose the right size and power you need to know what each of them is. By structure, steel panel batteries are of the following types:

• Type 33 - three-panel. The most powerful class, but also the largest. It has three panels to which three fin plates are connected (that’s why it’s designated 33).
• Type 22 - two-panel with two fin plates.
• Type 21. Two panels and between them one plate with corrugated metal. These heating devices, with equal dimensions, have less power compared to type 22.
• Type 11. Single-panel steel radiators with one fin plate. They have even less thermal power, but also less weight and dimensions.
• Type 10. This type has only one coolant panel. These are the most low-power and lightest models.

All these types can have different heights and lengths. Obviously, the power of panel radiators depends on both the type and dimensions. Since it is impossible to calculate this parameter independently, each manufacturer compiles tables in which it records test results. Based on these tables, radiators are selected for each room.

Manufacturer's description

Heating radiator Kermi

The German company was founded in 1960. The main profile of its activity is the production of panel-type heaters and modern shower stalls. A distinctive feature of Kermi heating radiators is the presence of two connection methods, as well as various design options. In addition to standard steel structures, the manufacturer offers relatively inexpensive bimetallic products.

A characteristic feature of German radiators is a high level of heat transfer, superior to that of models from other well-known manufacturers. It can be achieved due to the high efficiency of heat exchange processes occurring inside the heating system. Kermi heating radiators are an ideal option for installation in autonomous lines with low operating pressure (in a cottage or country house, for example).

Models Kermi FTV 22

Equipment in this series can be installed even in the living room, and the bottom type of connection will ensure that all pipes and wires are hidden under the floor. Good thermal conductivity is ensured by two heating panels and two convection elements (in previous versions there was only one element).

Characteristics

Models with bottom connection Kermi 22 are characterized by:

• material – carbon steel 1.25 mm thick;
• high heat transfer;
• not bulky dimensions;
• corrugated surface provides better heat distribution;
• pressure – 10 bar, length – from 400 mm, height – from 300 mm, depth – from 100 mm.

Price

This type of heater is designed for heating houses with spacious rooms. The presence of two convection elements allows you to make the heating system work more efficiently and quickly. The approximate cost of radiators of the FTV 22 type can be as follows:

• a 400x2000 mm model with a heat output of 3210 W and a capacity of 9 liters will cost 9,000 rubles;
• radiator 600x2300 mm with heat output 5173 W, capacity 14.49 l - 11,000 rubles;
• a heater 900x1200 mm with a heat output of 3797 W and a capacity of 10.8 liters costs 9800 rubles.

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The latest model is considered the most popular - it performs the maximum number of functions.

Options for increasing heat transfer

Any control device can lower the battery temperature. It is impossible to force a radiator to give off more heat. If the radiators in the apartment are cold, and the temperature in the room does not meet the standards (for corner rooms it is +20-22, for the rest - +18), you can try to change it in the following ways:

• try to remove air pockets in the batteries and clean the pipes and filters;
• analyze the connection diagram and possibly change it;
• add the required number of radiators.

I would like to dwell on the last point. When comfort in the apartment is at stake, it is advisable to avoid mistakes in choosing radiators, because it will be impossible to change anything.

Purmo steel panel devices show good results. The built-in convection elements of these batteries provide accelerated heating of the room; they can be used in both single-pipe and two-pipe heating options.

Their worthy competition is the company RIFAR Base, which presents a whole line of bimetallic and aluminum radiators. These batteries are able to withstand high pressure and perform their functions normally during significant surges in heating networks. The heat transfer rate of these heating devices is very high. The RIFAR Base 500 model is the most powerful in the range of bimetallic devices, and is designed for heating large rooms with poor thermal insulation.

German Kermi radiators deservedly enjoy a good reputation. They are steel or bimetallic. Three types of metal of varying thickness are used for production. Kermi heating equipment is mainly suitable for installation in cottages and private houses.

Types of radiators

produces two types of batteries: panel and tubular.

Panel

Panel-type radiators are equipped with protective linings made of thin steel that cover the heating element. The continuous design allows you to increase the heat capacity compared to the sectional one. The device panel can be smooth or ribbed.

Prices for panel heating radiators Purmo

panel heating radiators Purmo

Tubular

Tubular-type batteries consist of separate sections fastened together. They have a sophisticated design. Tubular structures are easy to clean. The main disadvantage: heat transfer is 15–20% lower than that of panel ones, with the same dimensions.

Peculiarities

The German company Kermi was founded in 1960. The main type of products produced are steel panel radiators, although the manufacturer is also known for shower cabins. However, it is German radiators that have gained wide popularity not only in Germany, but throughout the world. Russian buyers also liked the appearance of German batteries

An important component of success was the quality of products.

The features of the radiators include two types of connection, as well as three different metal thicknesses.

In addition to steel products, bimetallic options are available to customers. Russian consumers especially liked products intended for installation in individual houses and cottages. The appearance of the devices is refined, noble and elegant. The units are not cheap, but consumers note the cost recovery, as well as a high degree of comfort.

The operating principle of any radiators is based on the coolant circulating inside the device. The liquid entering the radiator tends to slow down its movement from device to device and also cool down. As a result, less heat is transferred into the room. The main feature of German radiators is their increased heat output characteristics. The heat transfer from the front surface of the installed batteries is quite decent. Therefore, Kermi radiators are ideal for autonomous heating systems with low operating pressure.

The company offers batteries in various sizes.

Mostly white models are on sale. According to the manufacturer, the powder coating of products is environmentally friendly. It is also claimed that this special coating allows for better temperature retention of devices. Decorative models found on sale differ from the main line in color and design features.

The main type of products manufactured by Kermi are panel radiators, consisting of steel plates connected in pairs. The coolant in such radiators moves through channels extruded by stamping. Usually there are several channels for circulating fluid. One of them is located at the top, and the other is at the bottom. There are several paired plates assembled in a steel product.

To increase efficiency, some models contain convective fins - these are corrugated steel sheets that are small in thickness and are usually welded behind the front panel. Externally, this usually does not change anything, but the sides and top of the product are decorated. Some Kermi batteries have a different media supply method. The Therm-X2 technology is considered consistent and renowned. In practice, hot liquid is supplied first to the front part, then to the subsequent ones. As a result, the hottest part is the part facing the rooms.

Greater heat consumption occurs in the room.

There is much less other heat consumption with this connection. In practice, Kermi series-type batteries heat the room faster than other types of devices. The devices showed a special heating quality when pumps and collectors were connected to the system. The company installs control valves on its devices. The new product allows you to optimally balance a stable temperature in all rooms. Basically, steel radiators from other manufacturers are supplied with thermostats, but the thermal head must be purchased separately. Kermi radiators add comfort to individual heating systems. The system consumes only a adjusted amount of fuel, which significantly reduces costs.

In addition to the sequential version, Kermi batteries have the possibility of a side and bottom version. The lower supply can be left or right, and it can also be in the center. Therefore, the installation of heating pipes can be done as conveniently as possible, without taking into account the features of the heating device. Installation of devices can be carried out after finishing is completed, it is only advisable to secure the brackets on the wall in advance. It is worth considering in more detail the technical characteristics of the main types of radiators produced by the company.

Adviсe

Reviews of Kermi batteries are mostly positive. High-quality raw materials and high-quality assembly make themselves felt. Kermi radiators are rated by users as correct and durable. At the same time, many consumers, when purchasing these products, largely rely on the recommendations of sales consultants. Russian consumers still know little about modern batteries. Those who have already replaced old analogues note the good performance of radiators with less filling of the system. As users note, consultants most often recommend type 22 radiators, which may be why they are so popular.

Few people know that, in addition to panel batteries, Kermi also produces designer models of various designs. If you want to buy something unusual but functional for your apartment, these are Kermi radiators with beautiful interweaving pipes in various designs. The models are highly durable, as the pipes are joined by laser. These radiators are of water type and also electric. The most productive units can heat a room up to 20 square meters. m.

It is worth noting the Kermi Ideos line. The shape of the ldeos pipes is refined and refined, reminiscent of stars. The assembly is of high quality.

Another original representative of the brand is Kermi Fedon. The model is not only original, but also easy to use. Particular comfort lies in the conveniently located temperature regulator. All connection points of parts in this model are hidden from view.

Kermi Credo Swing models are distinguished by an original connection of pipes with a triangular cross-section. Models in this line are characterized by smoothness. A heated towel rail is available to customers as an additional device.

The Kredo Duo model is similar to its previous brother, but is characterized by strict lines. The line of these radiators is famous for its improved heat transfer.

Credo Half are functional, beautiful products. The pipes in the radiator are transverse and harmonize perfectly with the screen block. Special spacers add stability to the product.

Credo Twist are presented with oval-shaped pipes. As a result, the battery itself looks beautifully curved. The size of the pipes is the smallest, but this adds a holistic look to the structure.

Karotherm is a model with perfect symmetry of numerous squares. Small squares are enclosed in a single outline.

Jive is the opposite of the previous option. The model seems ephemeral and light, but nevertheless transmits enough heat to warm the room. The Icaro model is similar in appearance to the previous version. This battery is also asymmetrical, light, airy.

The products from the Dekor line are somewhat similar to the usual finned radiators. The pipes in the models are large with a round cross-section. A distinctive feature is the built-in power control system.

The line is distinguished by varieties S, D. The latter variety is especially similar to our old radiator batteries, however, it has a more refined appearance.

Experts say that this particular line of products is ideal when replacing cast iron radiators with new modern models. When replacing, no additional adapters or switches are required. New radiators of the Decor D series are simply installed into the system. If you need to clarify more detailed characteristics of the products you like, it is best to study them according to the passport indicators.

To learn how to install Kermi radiators, see the following video.

Determining the power of radiators based on the volume of the room

According to building codes, one cubic meter of room requires the following heat transfer:

• in panel buildings – 0.041 kW;
• in brick - 0.034 kW.

For example, let’s take a room in a brick building. Ceiling height – 2.7 m. Walls 3 and 5 m long. Room volume – 40.5 m3. To obtain the average power indicator, it is necessary to multiply the volume by a factor of 0.034 kW. The result of the product (40.5x0.034) is 1.377 kW (1377 W).

But this result is valid only for the average climate zone and without taking into account the correction depending on the number of external walls and windows. The illustration shows the dependence of the coefficients on the average winter temperature.

Some coefficients by which you need to multiply the average required heat transfer, depending on the number of external walls and windows, as well as taking into account the location of window openings:

• 1 external wall – 1.1;
• 2 external walls and 1 window – 1.2;
• 2 external walls and 2 windows – 1.3;
• the windows “look” towards the north – 1.1.

If radiators are supposed to be installed in a niche, then for Kermi batteries the power calculation is adjusted taking into account a factor of 0.5. If the thermal structure is covered with a perforated panel, the average value should be multiplied by 1.15.

For example, in our conditional room with a volume of 40.5 there are two walls facing the street. At the same time, the average temperature in winter is -30. In this case, we multiply the resulting heat transfer by the required coefficients - 1377x1.2x1.5 = 2478.6 W. The rounded result is 2480 W.

This number is relatively accurate, but the matter is not limited to the mentioned coefficients. When making thermal calculations, specialists take into account what material the walls are made of, the characteristics of the surrounding rooms, etc. But, provided that the average indicators are averaged, this number can be used. To determine the type of batteries, the power table of Kermi radiators is used.

Don't overdo it

It should also be noted that 14-15 sections for one radiator is the maximum.
Installing radiators of 20 or more sections is ineffective. In this case, you should split the number of sections in half and install 2 radiators of 10 sections each. For example, place 1 radiator near the window, and the other near the entrance to the room or on the opposite wall. In general, it's up to you. It's the same story with steel radiators. If the room is large enough and the radiator is too large, it is better to install two smaller ones, but with the same total power.

If there are 2 or more windows in a room of the same volume, then a good solution would be to install a radiator under each window. In the case of sectional radiators, everything is quite simple.

14/2=7 sections under each window for a room of the same volume

But, since such radiators are usually sold in 10 sections, it is better to take an even number, for example 8. A supply of 1 section will not be superfluous in case of severe frosts. This will not change the power much, but the heating inertia of the radiators will decrease. This can be useful if cold air often enters the room. For example, if this is an office space that clients often enter. In such cases, radiators will heat the air a little faster.

Installation

Installation of Kermi radiators is not difficult, but each job has its own nuances. For example, when there is no need to replace pipes, adapters will help solve the problem with different diameters of communications and radiator outlets. The instructions will help with more competent installation. It is convenient to study the connection nuances using the diagram supplied with the product. For example, it indicates an important point regarding the connection of the separation plug, which ensures the functioning of Therm-x2 technology.

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The installation process also involves two types of connections, which means the installation schemes can be bottom and side.

It is important to choose the optimal location depending on the type of installation; the manufacturer’s recommendations are as follows:

• 100–120 mm from the floor covering;
• 80–100 mm from the window sill.

In both cases, this distance will provide the most efficient heat transfer. If the radiator is located 20–50 mm from the vertical, then there will be no energy loss for gentle heating of this area.

A distinctive feature of the company is that the batteries are supplied in stores with all the necessary components for installation. The heating device is presented in a branded box. The packaging may not be removed during installation, thereby leaving the device intact.

The standard Kermi kit includes the following items:

• loops;
• corner clamps, console;
• grill top;
• covers and damping sides;
• Mayevsky crane;
• thermostatic tap;
• instructions for installation and use.

The stages of attaching radiators can be presented in the following order:

choosing a location for the device taking into account optimal heat transfer; marking under hooks; fastening of auxiliary fittings; fixing the radiator on hooks; device alignment; connecting the device according to the diagram to the pipes; pressure testing - testing a system that can be hydraulic (water) or pneumatic (air); commissioning work, during which it is important to check the tightness.

13.09.2017 06:48

The required thermal output of Kermi radiators depends on:

• room area;
• room volume;
• heat loss of the room;
• characteristics of the heating system.

KERMI selection rules.

Rules for selecting KERMI :

These rules are simple. With an average ceiling height of 2700-2800 mm, a radiator with a heat transfer of at least 100 W/kW.m is selected. All.

And then, if the ceiling is higher (let’s say 3300mm), we calculate the heat transfer of the KERMI radiator:

3300mm : 2700mm = 1,22 .

This is the coefficient by which the specific heat transfer per square meter must be increased,

We get 122 W/kW.m. It's also easy.

Example: a room has 22 sq.m. and there are 2 windows, each 1200mm wide, with a standard ceiling height of 2700mm.

It is clear that this should be 2200 watts of heat output, from two radiators (1100 watts each radiator).

These can be radiators (your choice!) from the bottom (FKV), or from the side (FKO):

11 05 10, or 12 05 08, or 22 05 06, or 33 05 04.

Which KERMI radiator should you choose? Any one from the list above is suitable.

Design considerations come into play: the window width is 1200mm. Radiator KERMI 33 05 04 (40cm long) will look poor. It will be more beautiful if the length of the radiator is proportional to the width of the window. So, we chose KERMI, TYPE 11 05 10 .

This is at standard window sill heights.

The choice of radiator height depends on the height of the window sill. According to SNIPP, the radiator is installed at a distance of at least 100mm from the floor and at least 100mm from the window sill.

And if, in our case, the height of the window sills is, say, 500 mm from the floor?

This means that the height of the KERMI radiator cannot be higher than 300mm. On our website we select radiators,

300mm high, but with the same heat output = 1100W:

This is 11 03 16, or 12 03 12, or 22 03 09, or 33 03 06. We already understand that KERMI will look better

12 03 12 (length 1200mm), or 22 03 09 (length 900mm).

Now that we, dear Developer, have already selected KERMI radiators for each room, let’s stop.

So, before us is a plan of rooms with correctly selected and registered radiators.

And in the corridor you have nowhere to stick the radiator... This means that its heat transfer must be redistributed to radiators located in the rooms adjacent to the corridor, increasing their power proportionately.

You can increase the power of radiators everywhere: in the Children's room, in the bedrooms, in rooms whose walls are blown by the cold winds of the wind roses, in the hallway, etc. This must be done. And it is right.

A person’s desire to understand everything himself always commands respect.

And when there is no time? Or don't want to make a mistake? Then send me the house plan. We'll pick it up for you.

From the sent plan the following should be clearly visible and understandable:

1. The area of ​​each room.
2. The width of each window and the height of the window sill above the FINISHED floor.
3. Ceiling height.
4. And your considerations on the design of KERMI radiators are important, as well as your preference for the type of pipe connection to the radiators.

Comparison of characteristics of leading manufacturers

Bimetallic batteries are offered by many manufacturers, both Russian and foreign. There is no point in listing the characteristics of products from all brands here, especially since they are largely similar. For example, the interaxial dimensions of bimetallic radiators range from 200 to 800 mm, the most popular of them are 350 and 500 mm. The total height of such products is approximately 420 and 580 mm, respectively. The depth and width of each section is manufactured in the range from 80 x 80 mm to 100 x 85 mm.

There are heating devices with a center distance of 200 and 800 mm, the former are designed for installation under a low window sill or stained glass window and often have a floor mount and a bottom connection. The 800 mm standard size looks good near blank walls.

Let's look at the performance characteristics of heating radiators using the example of leading Italian and Russian brands: GLOBAL, RADENA and RIFAR. We will summarize all the data in a table.

Having carried out an express analysis of the given characteristics, we can say that Italian products place maximum emphasis on the reliability and durability of products, even at the expense of the available thermal power. This can be seen in the increased weight and high operating pressure threshold of the batteries. Although the increase in weight is insignificant in terms of complicating the installation of radiators. At the same time, the Russian manufacturer RIFAR separately offers the MONOLIT model, operating at operating pressures up to 100 Bar. This figure was achieved due to a monolithic design, where the sections of the bimetallic battery are inseparable from each other and there are no threaded connections.

Get a consultation

Suitable for all heat sources: oil, gas or district heating, powered by solar energy or a conventional heating system. This design meets the requirements of technology for maximum utilization of combustion heat.

Made to the high Kermi quality standard. Unique technique. High thermal output – ideal for low temperatures. Sensitive and dynamic adjustment thanks to low water content.

Suitable for all heat sources: oil, gas or district heating, powered by solar energy or a conventional heating system. This design meets the requirements of technology for maximum utilization of combustion heat.

Table for selecting the thermal power of radiators depending on the temperature of the network water:

Kermi steel panel radiators vary in type. The types differ in the number of heating (convective) panels.

This table shows the location of the Kermi radiator mounts depending on the radiator size.

Connection features

Radiator installation standards

Installing Kermi radiators is not at all difficult, especially if you take into account all the nuances of the upcoming work in advance

If you do not plan to change the existing wiring diagram, it is important to provide for the possibility of connecting it to the inlet and outlet pipes of the battery. With different standard sizes of pipes laid in the apartment and working openings of radiators, special adapters will be required

To identify the installation features of a new heating system, it is recommended to immediately read the installation instructions. After all the nuances have been taken into account, you can proceed directly to the procedure for connecting radiators. At the same time, we should not forget that there are two connection options, according to which it can be bottom and side. Each of these methods has its own characteristics.

Before installing Kermi radiators with bottom connections, for example, it is important to decide on their installation location, selected taking into account the following requirements:

• the distance from the floor should not be less than 100-120 mm;
• location relative to the window sill - no closer than 80-100 mm.

Compliance with these requirements guarantees the convenience of pipe installation and also ensures maximum heat transfer.

When purchasing radiators, consumers receive brackets, Mayevsky valves, plugs and adapters in the kit.

Another feature of these products is that they are supplied with all the necessary components for installation, which includes:

• mounting brackets (hooks);
• corner clamps;
• upper protective grille;
• covers and sides in the form of plugs.

The same kit includes thermostat and Mayevsky bleed valves, but not for all types of supplied products.

The procedure for installing and connecting radiators with bottom connections:

1. Marking of the mounting points for the brackets is applied at the selected location.
2. They are securely attached using the hardware supplied with the kit.
3. Upon completion of this operation, the radiator is hung on hooks and leveled.
4. After this, it is connected to the pipe system (including the return).

The last procedure is carried out in accordance with the diagram available in the instructions.

Advantages and disadvantages of Kermi batteries

German Kermi heating radiators have a lot of advantages and a minimum of disadvantages - this is typical for many types of products made in Germany. First, let's describe the key advantages:

Kermi Therm-x2 technology will help save your money thanks to the special circulation of coolant in the radiator.

• High efficiency due to the therm-x2 technology used – ensures reduced heating costs;
• High-quality steel base – ensures long service life;
• Resistance to pressure up to 10 atmospheres - test pressure for many models is 13-14 atmospheres;
• An abundance of models - for any interior;
• Availability of built-in thermostats (typical for some models);
• Fast heating of rooms is ensured by therm-x2 technology.

As for the disadvantages, there are very few of them:

• Lack of resistance to water hammer - steel cannot withstand strong overloads;
• Somewhat high prices - you have to pay for the quality of German products.

Thus, Kermi heating batteries will be an excellent solution for heating residential premises.

Generalization on the topic

The described radiators have unique technical characteristics. Innovative heating technology made it possible to form them. The principle of its operation is significantly different from that of conventional steel radiators. The difference lies in the design features of the heating equipment described and in the supply of coolant. In ordinary steel batteries, it flows evenly into all radiator tubes. Here it is first supplied to the front panel, and then goes through a convector located along the rear panel. This scheme made it possible to increase the efficiency of the heating device by 11%.

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Read further:

Gas boiler Navien - technical characteristics, design features and model range

Danish circulation pumps Grundfos - technical characteristics and design features

Technical characteristics of aluminum radiators and features of their design

Kermi steel radiators - low inertia, high-quality heating

Bimetallic heating radiators rifar - technical features and advantageous characteristics

Heating devices of single-pipe systems

An important feature of the horizontal “Leningrad” is the gradual decrease in temperature in the main line due to the admixture of coolant cooled by the batteries. If 1 ring line serves more than 5 devices, the difference at the beginning and end of the distribution pipe can reach 15 °C. The result is that the latest radiators emit less heat.

Single-pipe closed circuit - all heaters are connected to 1 pipe

To ensure that long-distance batteries transfer the required amount of energy to the room, make the following adjustments when calculating heating power:

1. Select the first 4 radiators according to the instructions above.
2. Increase the power of the 5th device by 10%.
3. Add another 10 percent to the calculated heat transfer of each subsequent battery.

Features of operation

Any radiators require cleaning from dust two to three times a season: dust greatly reduces heat transfer. In addition, in currents of warm air it rises to the top and can cause allergy attacks. But some models (except type 10 and hygienic) panel radiators are closed on all sides: there are side covers and a grille at the top. There are no latches or other devices visible from the outside.

There is only a plastic “Kermi” logo on the side panel. So he serves as the key. Pull the left edge of the logo towards you and turn it down a little. A hole opens. But the logo still needs to be turned counterclockwise until it comes off (it screws onto a plastic threaded pin, so don’t pull too hard). But the left edge needs to be pulled back all the time - there is a locking edge there that can scratch the paint. After you remove the logo, you can pull the side plate down so that it is removed from the latches. If the model has a valve, remove the left panel first; there is a valve on the right and is in the way. After removing the sides, nothing holds the lid. Can be cleaned.

Assembly proceeds in the reverse order: install the top grille, then the side panels (first right, then left), and then the logos.

Kermi radiators are found in approximately 80-90% of stores selling heating equipment. It’s easy to verify this - go to any store and check their availability, in the vast majority of cases the answer will be positive. Radiators from this German manufacturer are famous for their quality and durability, and their variety allows you to heat any type of room. Therefore, we decided to devote a separate review to Kermi. In it we will tell you:

• About the technologies used in production;
• About the technical characteristics of radiators;
• About the advantages and disadvantages of Kermi products;
• About the most popular models.

Finally, we will publish user reviews.

Reviews

“Kermi are one of the most expensive, but also the most reliable radiators. They are in my apartment. To prevent rust after the end of the heating season, I close the taps and the water remains inside. And further. These are the whitest radiators I’ve ever seen.”

Cherkasy

“They say Kermi has the most reliable panel radiators. This is probably so, because they have considerable weight. Only worn by two people. It’s only been there for a season so far, but there are no complaints.”

Nikolai. Eagle

“Very reliable. My Kermi's have been standing for 7 years now. The appearance hasn't changed one bit. What they were is what they are. They did not swell in any place, nor did they rust in any place. They are located in the house, so they are easy to use. It is problematic to clean the inside: neither a rag, nor a brush, nor a steam generator can completely clean it. You have to struggle with the wire, at the end of which there is a rag attached. But this is a disease of all panel radiators, not just Kermi.”

Alex, Tiraspol

Panel steel heating radiators KERMI ThermX2

Made according to all European standards, they have a wavy profile surface and are notable for their low price. They are only suitable for closed heating systems. The small volume of hot water coupled with high heat output makes these devices most suitable for autonomous heating. Moreover, it is better to use them in systems where the coolant is not excessively hot.

These radiators are made using the latest patented X2 technology, which significantly increases the efficiency of heating devices. By doubling the radiation of the infrared spectrum, this technology made radiators very comfortable. Heating time has accelerated by about a quarter, and savings have increased by 11%. The meaning of the X2 principle is that the front panel heats up first, and only after that the back panel. For more information about this, see the video below.

Video: Technical features of Kermi steel panel radiators

After joining the panels into a body, the finished product is first thoroughly degreased, then it is phosphated. The final finishing is done using electrostatic painting. The top layer of paint is processed at a temperature of 180 degrees. This makes it durable. The shiny coating gives the batteries an elegant look.

The radiator has screen grilles on the top and sides. They can achieve a significant increase in heat transfer efficiency - by 60%. The set includes 4 pads designed for attaching equipment.

There are 2 lines of Kermi panel radiators, which differ in the location of connection to the heating network. Radiators from the Kermi ThermX2 Profil-K (FKO) line are connected to the side. And devices such as Kermi ThermX2 Profil-V (FKV or FTV) are designed for connection from below.

Side-connected Kermi ThermX2 Profil-K

These radiators are equipped with convectors, and their panels are made of two profiled steel sheets connected by welding. There are screens on the sides, and an overhead grill-type grill on top. Radiators with a side connection type are marked with the letter combination FKO. To connect to the system on the sides, the Kermi Profil-K FKO device has four pipes with internal threads (1/2″ diameter). The radiator can be connected to the pipes from any side.

Technical characteristics of heating radiators Kermi ThermX2 FKO:

• Connecting thread: 4 x G1/2” (internal)
• Height: 300, 400, 500, 600, 900
• Center distance: total height minus 50 mm
• Length: from 400mm to 3000mm
• Depth: type 10 and 11 - 61mm, type 12 - 64mm, type 22 - 100mm, type 33 - 155mm
• Working pressure – 10 atm. (1.0 MPa)
• Crimping pressure – 13 atm. (1.3 MPa)
• Max. coolant temperature: 110°C
• Operating temperature – 95°

Characteristics of the model range of equipment produced by Kermi (Germany)

Consumer surveys have shown that equipment from Kermi (Germany) is relatively popular in Russia, and these steel batteries have received special attention thanks to:

1. high level of heat transfer and performance. Thus, one Kermi steel block outperforms 10 aluminum appliances;
2. stamped steel sheet acting as a structural material, 1.25 mm thick, the heating element can withstand extreme system pressure and water hammer;
3. double coloring extends the service life of Kermi Russia radiators. Heating elements operate at any pH value of the coolant;
4. A wide range of models and a rich assortment of standard sizes enable Russian consumers to choose what they need among the entire range of Kermi battery products. But panel radiators are characterized by a solid structure and, unlike sectional equipment, their length cannot be increased or decreased at your discretion;
5. Kermi steel panel batteries are used with all types of pipes - steel, plastic, copper. In the case of copper pipes, you don’t have to worry about electrochemical corrosion; the plastic structural elements will never lose their integrity, and the additional equipment that comes with the radiator will ensure a sealed connection.

Characteristics of standard sizes – panel steel batteries Kermi (Germany)

Kermi steel heating radiators have a high level of heat transfer.

The device consists of two steel panels welded together. Channels through which the coolant circulates are squeezed out. To increase heat transfer, U-shaped ribs are welded on the back side of each panel. They can be made in several rows; both the size of the radiator and its power depend on this. The entire structure is covered with decorative strips on top and sides. They increase the decorative value of the device.

Each panel radiator produced by Kermi Russia has a specific marking. From it you can determine the size of the device, its power, and structure.

So, today Kermi panel batteries are found with the following markings. Batteries marked type 10 indicate the presence of only one panel. Such a device will fit perfectly into the cramped passage of a small apartment. Next comes type 21 - it has two panels, between which there is one fin, type 22 - two panels and two rows of finned convectors, type 33 - respectively, three rows of fins and three steel panels.

Regarding the sizes. In general, equipment manufactured by Kermi (Germany) is produced in heights of 300-900 mm, width - 400-3000 mm, radiator depth - 45-158 mm.

Review of the model range - steel, panel batteries from Kermi (Germany)

Kermi heating devices today on the Russian market can be found in the following lines:

Kermi radiators are slightly more expensive than Purmo.

1. Kermi FKO Russia – option with side connection. All standard sizes are available. A distinctive feature is not only the side connection, but also additional convectors. They increase the heat output of Kermi FKO by up to 60%. Steel panel heating radiators of this type can be produced with either a smooth or ribbed surface. The decorative layer is unique. It consists of a high-gloss lacquer coating (iron phosphate), a primer or bottom layer of cathodic immersion varnish and powder coating in accordance with DIN 55900FWA. Additional equipment for the radiator is a fastening system (consoles, spacers, holders), there are thermal valve convectors, complete with a thermal head and a thermal valve. There are plugs and a Mayevsky air bleeder valve;
2. Kermi FKV Russia – bottom connection and external thread. All declared sizes are available. These heating devices are perfect for built-in heating systems, as they have a bottom connection. They can withstand pressure up to 10 atm. The two-layer painting system increases the durability of the product. Kermi FKV for Russian consumers is supplied complete with a thermostatic valve, fastening system, Mayevsky tap and plugs;
3. Kermi FTV Russia - bottom connection with conventional cut thread. Steel plates and stiffeners can be present in any quantity. These panel radiators are supplied complete with a standard set of additional equipment.

Important! Unlike products from Purmo (Finland), panel steel radiators from Kermi (Germany) are slightly more expensive