Steel panel radiator Kermi therm-x2 Profil-K type 22 with side connection

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.

About the manufacturer ↑

The German company Kermi was founded back in 1960. Since 1967, the company has been closely involved in the production of steel panel radiators. (By the way, since 1976 it has also been closely involved in the production of shower cabins). And by 1975, Kermi had achieved a leading position in this segment. Kermi best known in Germany itself, but they are also well known in other European countries.

These heating batteries have appeared on the Russian market relatively recently, but they are trusted. And the 5-year warranty from the manufacturer is certainly captivating.

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.

There are two options for connecting Kermi flat panel radiators:

1. Side connection FKO Compact profile radiator therm X2 Profil K, 2. Bottom connection FTV (FKV) Compact valve radiator therm X2 Profil V.

To obtain different thermal power of Kermi radiators , panels and fins are combined in several options, and have different power (heat transfer). To choose the right size and power you need to know what each of them is. According to their structure, Kermi steel panel batteries are of the following types:

• Type 10 - This type has only one coolant panel. These are the lowest-power and lightest models without cladding, single-row radiators with a mounting depth of 61 mm ;

• Type 11 - Single-panel with convective fins, with cladding, with installation depth - 61 mm ;

• Type 12 - Two panels and between them one plate with corrugated metal, cladding, fast flow, installation depth - 64 mm;

• Type 22 - Perhaps the most popular type of Kermi radiators, two-panel, with two fin plates, with lining, installation depth - 100 mm ;

• Type 33 - Three-panel. The most powerful class, but also the largest. It has three panels, to which three fin plates are connected, have a fast flow, with lining and have an installation depth of 155 mm .

All these types can have different heights 200 (22 and 33 types) 300 , 400 , 500 , 600 and 900 mm. and lengths 400 , 500 , 600 , 700 , 800 , 900 , 1000 , 1100 , 1200 , 1300 , 1400 , 1600 , 1800 , 2000 , 2300 , 2600 and 3000 mm.

Calculation by area

• This is the simplest option for determining a more or less exact amount of heat required for heating. When calculating, the main starting point is the area of ​​the apartment or house where heating is organized. The area of ​​each room is shown in the apartment plan. For the average climate zone, the norm for a residential premises is defined as 100 W/1 sq.m.
• But since not all apartments have exactly these parameters and layout, there are some indicators that should be taken into account when calculating the number of radiator sections for each specific apartment.
• If the room has not one external wall, but two, then 100 Watts/sq.m. m. you need to add another 20%. And if there is not one window, but 2 or 3 (with two external walls), then to these 100 Watts/sq. m. you need to add 30%. If both windows face the colder northern side or northeast, then add another 10% to the resulting amount. All! That's the whole calculation!!! And no formulas are needed))
• of the Kermi radiator itself are also important . If you plan to install it in a so-called open niche, then you need to add another 5% to the amount already received, and if in a closed niche, then the entire 15%. Only by taking into account all these features of the room can you really correctly calculate the heat output of the heating device, which will be the most optimal for a particular apartment in the given climatic conditions.

Technical characteristics of heating radiators Kermi ThermX2 FKO:

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

Technical characteristics of Kermi ThermX2 FKV:

• Connecting thread: 2 x G3/4” (external).
• Radiator heights: 300 , 400 , 500 , 600 , 900 mm.
• Radiator length: from 400 mm to 3000 mm.
• The distance between the supply pipes (center distance) is calculated as follows: the height of this radiator minus 56 mm (for example, the height of the battery is 500 mm - 56 mm = 444 mm, i.e. 444 mm is the center distance).
• Radiator depth: type 10 and 11 - 61 mm , type 12 - 64 mm , type 22 - 100 mm , type 33 - 155 mm .
• Working pressure – 10 atm . (1.0 MPa).
• Maximum coolant temperature: 110°C .
• Operating temperature – 95°C .

• Crimping pressure – 13 atm . (1.3 MPa).

Contents of delivery:

• Kermi therm-x2 profile radiators with mounting plates (except for mounting height 200), the surface is powder-coated with preliminary primer;
• The side strips and the top decorative grille (except for type 10) are removable for cleaning;
• The delivery set includes installation accessories at no additional cost ( except for mounting height 200 );
• Compact profile radiators therm-x2: Types 12 – 33 additionally with dividing plug therm-x2 (except for installation height 200).

Fastening

• Fastening with 4 pads up to a length of 1600 mm and with 6 pads from a length of 1800 mm (installation height 200 without pads);
• adjustment is possible when mounted.

Coating

• Brilliant two-layer paint coating, does not emit harmful substances, uniform and environmentally friendly;
• Complies with DIN 55900-FWA : surface degreased, phosphated, primed with cathodic immersion varnish (ETL) and powder coated (EPS); Standard finish: Kermi white (similar to RAL 9016);
• Paint color from the Kermi color range.

Quality

• RAL checked;
• All radiators are tested for leaks;
• Control pressure: 13 bar ;
• Max. operating pressure: 10 bar ;
• Max. operating temperature: 110°C ;
• Certification according to DIN EN ISO 9001:2008.

Package

• Supplied already assembled in a cardboard box, packed in protective film;
• Protective packaging for installation on construction sites does not require removal during installation.

Connection

• Compact profile radiators therm-x2: 4 x G 1/2“ internal thread;
• Therm-x2 profile valve radiators: 2 x G 3/4″ external thread, standard connection at the bottom right, optional connection at the bottom left at no additional charge 3 x G 1/2″ internal thread at the side;
• Therm-x2 profile valve radiators with central connection: 2 x G 3/4“ external thread, bottom center connection, standard valve on the right. On request, a version with a valve on the left is possible (at no additional charge). The supply pipe is always located on the left, regardless of the location of the valve. The distance to the wall is the same for all multi-panel radiators;
• Mounting height 200 without x2 INSIDE.

Additionally for valve radiators:

• The valve is adjusted to the heat output of the radiator using factory preset kv values;
• Plugs and air bleed valves are installed and sealed.

5 year warranty

• The warranty only applies to radiators installed in a closed heating system.

* see below for technical information on Kermi profile steel radiators.

Our online store is an official dealer of the Kermi , in a full range at the best prices in Moscow, we offer you Kermi steel radiators and components at competitive prices!

Kermi radiators are a guarantee of impeccable functioning of the heating system at home not only for you, but also for your children and grandchildren!

Determining power

The power of steel panel radiators must be determined based on the heat loss of the room in which they will be installed. For apartments located in standard buildings, one can proceed from SNiP standards, which normalize the required amount of heat per 1 m 3 of heated area:

• Premises in brick buildings require 34W per 1m3.
• For panel houses, 41W is consumed per 1m3.

Based on these standards, you determine how much heat is required to heat each room.

For example, a room in a panel house is 3.2m*3.5m, the ceiling height is 3m. Let's calculate the volume 3.2 * 3.5 * 3 = 33.6 m 3 . Multiplying by the norm according to SNiP for panel houses we get: 33.6 * 41 = 1377.6 W.

SNiP standards are indicated for the average climate zone. For the rest, there are corresponding coefficients depending on average winter temperatures:

• -10 o C and above - 0.7
• -15 o C - 0.9
• -20 o C - 1.1
• -25 o C - 1.3
• -30 o C - 1.5

Correction of heat loss is also necessary depending on the number of external walls, because it is clear that the more such walls, the more heat escapes through them. Therefore, we take them into account: if one wall goes outside, the coefficient is 1.1, if there are two, we multiply by 1.2, if there are three, then we increase by 1.3.

Let's make adjustments for our example. Let the average winter temperature in the region be -25 o C, there are two external walls. It turns out: 1378W*1.3*1.2=2149.68W, rounded up to 2150W.

Let's use this figure as an example. Provided that the insulation of the house and windows is average, the found figure is quite accurate.

Appearance ↑

Kermi have truly become a recognized leader in their segment. Their steel panel radiators (and not only) have become widely known in the world, and popularity, as you know, is the second component of success. And quality. Today the company produces not only its traditional steel batteries, but also bimetallic ones. They have two types of connection - bottom and side. And three different thicknesses of metal.

Steel radiators are more suitable for country houses, where the pressure is not as high as in the city. Steel radiators are at risk of water hammer; bimetallic batteries are capable of maintaining pressure up to 30 atmospheres.

In order not to waste your time by describing their external advantages, I suggest watching a short video about these devices below, so you can form your own idea about them.

Consumers are interested in different models, including decorative batteries with an unusual stylish design

The heating equipment of the radiator series is mainly intended for individual houses and cottages, and have a corresponding appearance: refined, elegant, noble. This is not to say that they are cheap, but they say that the costs are justified by the high degree of comfort.

In fact, the operation of any liquid radiator is based on one principle - the coolant (in this case it is water) enters the radiator tank and slows down, gradually cooling down and transferring heat into the room.

The main advantage of these devices is their high specific thermal power. So Kermi radiators are considered very powerful.

Batteries transfer heat by thermal radiation from the front surface and have very decent heat transfer. They are usually installed in autonomous heating systems, since they are designed for low operating pressure.

It’s hard to disagree with the fact that the appearance of Kermi brand radiators is quite aesthetic. Batteries come in different sizes. Radiators are mainly produced in white color, they are coated with a special powder coating (according to the manufacturer, it is environmentally friendly! I have not yet seen any refutations, so it is quite possible that this is true), which seems to allow you to maintain the temperature longer. But there are decorative models that differ from the main line in both color and design.

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°

Bottom-connected Kermi ThermX2 Profil-V

All of these radiators have a thermal valve built into the design. Its thread is right-handed, with a pitch of M30x1.5. The temperature controller is not included in the package; it must be purchased separately. The thread of the pipe is external, its diameter is 3/4″. The center-to-center distance is 5 cm. This design is intended for two-pipe heating systems. If you need to connect to a single-pipe system, then purchase special fittings.

Technical characteristics of Kermi ThermX2 FKV:

• Connecting thread: 2 x G3/4” (external),
• Radiator heights: 300, 400, 500, 600, 900
• Radiator length: from 400mm to 3000mm
• Distance between supply pipes: 50mm
• Radiator 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)
• Maximum coolant temperature: 110°C
• Operating temperature – 95° C

In addition to connection methods, panel radiators also differ in type. In total, Kermi produces 5 types of steel panel radiators:

Type 10 is single-row, has a depth of 6.1 cm. There is no cladding or convector. Manufactured by pre-order only.

Type 11 - single-row, lined, depth - 6.1 cm. There is one convector.

Type 21 – double-row, lined, with a depth of 6.4 cm. One convector.

Type 22 – double-row, lined. Two convectors.

Type 33 – three-row, lined. Three convectors.

The most popular and frequently used is type 22.

Design Features

Any panel radiator consists of steel plates connected in pairs. The plates are stamped with channels through which the coolant moves. There are two horizontal channels - one at the top, the other at the bottom, and a large number of vertical ones. The plates connected in pairs are assembled into radiators one, two or three pieces at a time. To increase heat transfer, convective fins—corrugated steel sheets of small thickness—can be welded to them. They are located behind the front panel and do not spoil the appearance, but are covered with lids on the sides and top.

This is a variant of the heating panel with a corrugated front panel

Kermi batteries are made the same way. The order in which the coolant is supplied differs. It's parallel for everyone. This means that the liquid at the same temperature is supplied to all panels in the radiator. This feeding method works very well at high network temperatures. But as soon as the temperature decreases (warming, for example), the radiators become almost cold.

In Kermi panel radiators, the coolant supply is sequential and this technology is called Therm-X2. This means that the hottest flow is supplied to the first panel, and then to the second and third. Thus, the heated part is the part that faces the room. And the second and third are increasingly colder. In this case, most of the heat goes into the room, and non-production costs for heating the wall behind the radiator become much lower. Therefore, at the same coolant temperature and the same size, Kermi batteries heat the room 25% faster.

The new Therm-X2 technology makes it possible to warm up the room well even in low-temperature operating modes. This feature makes it possible to use Kermi flat panel radiators not only with traditional heat sources. They work very effectively with low-potential sources: with heat pumps of any type, solar panels and collectors.

Some people may find a smooth front surface more attractive.

Another new feature has been used in these radiators. The company installs balanced control valves. Balancing parameters were determined as a result of research. All bottom-connected steel radiators are supplied from the factory with balanced and adjusted thermostats (the thermal head must be purchased separately). By installing such a heating device, you get a stable temperature in the room: the amount of coolant required to maintain the temperature is supplied to the collector. You need to change the setting if you are not satisfied with the selected mode. Using a thermostat is not only comfort, for individual systems it is also an opportunity to save money: only the required amount of fuel is spent on heating.

There are some other features in connecting Kermi radiators. There are options for side and bottom pipe supply. Moreover, the bottom one can be not only right or left, but can also be located in the center. This allows you to make the wiring without being tied to the presence of heating devices. They can generally be installed after finishing the finishing work (you just need to first secure the brackets to the wall).

Selecting a radiator based on calculation

Steel radiators

Let's leave out the comparison of different types of heating radiators and note only the nuances that you need to have an idea about when choosing a radiator for your heating system.

In the case of calculating the power of steel heating radiators, everything is simple. There is the necessary power for an already known room - 2025 watts. In this case, look at the table and look for steel batteries that produce the required number of watts. Such tables are easy to find on the websites of manufacturers and sellers of similar products.

Here is an example of such a table:

The table indicates the type of radiator; in this example, we will take type 22, as one of the most popular and quite worthy in terms of its consumer qualities. And a 600x1400 radiator suits us perfectly. The power of the heating radiator will be 2015 W. But it’s better to take a little more than a little less power

Aluminum and bimetallic radiators

In this case, there is one important difference in calculating the power of radiators. Aluminum and bimetallic radiators are often sold in sections

And the capacity in tables and catalogs is indicated for one section. Then it is necessary to divide the power required to heat a given room by the power of one section of such a radiator, for example:

2025/150 = 14 (rounded to whole numbers)

And we got the required number of sections of such a radiator for a room with a volume of 45 cubic meters.

Innovative Kermi radiator design

If the story about radiators is replete with cliches like: “made of the highest quality sheet steel using the latest technology,” or “durable powder coating in any color,” then you will quickly become bored.

You say - this is written on the website of any battery manufacturer, everyone praises their products. And you’ll be right, they write everything well, but how everything is actually done is a question. Therefore, let’s move straight to the specific feature that distinguishes Kermi panel radiators from all others.

It would seem, what other solutions can be implemented in heating devices, when everything that is possible has already been invented? It turns out not all. The Germans added internal piping to the radiators. This allows you to heat only the front panel of the device in normal mode; no water circulation occurs in the rear part. But as soon as the room temperature drops, the built-in thermostat will open the way for coolant to the rear panel, bringing the radiator to full power. Otherwise, these are ordinary steel batteries, only very reliable and made in compliance with the highest quality requirements.

Note. In connection with the introduction of a new technology for alternately supplying coolant to the front and rear parts, the Kermi radiator received the prefix “therm X2” in its designation.

Power calculation

One of the options for calculating radiator power involves the use of a comparative method, when a typical cast-iron 12-section battery is taken as a basis.
From the studies conducted, it is known that with such dimensions it provides a heat transfer of about 1444 W. The capacity of the internal volume of the cast iron sample filled with coolant is 13 liters.

From the Kermi battery passport it is easy to find out that the heat transfer from a typical single-section unit code 10 is about 2100 W (with a working volume of 6.3 liters). Using this data when replacing cast iron batteries with new models, you can be sure that their heat transfer will be no worse, and even slightly higher.

To correctly determine the required power and radiator connection diagram, a tabular calculation option is used. To implement it, the following additional data will be required:

• the amount of heat loss in the apartment;
• liquid carrier parameters;
• expected room average temperature.

When choosing, the dimensions of the radiator are also taken into account, after which appropriate adjustments are made to the selection algorithm. The required value of thermal output is determined from a summary table provided by the manufacturer of a specific radiator from the popular Kermi line. The required model is located in the corresponding column, opposite which the power value suitable for it is indicated. Experts advise taking this indicator with a small margin, which guarantees obtaining the required result.

After all parameters are taken into account, the user will be able to more accurately determine the model suitable for specific operating conditions.

Radiators "Kermi": characteristics

Smooth and profile models with side and bottom connections have the following technical characteristics:

• Working pressure up to 10 Bar;
• Test up to 13 Bar;
• Maximum coolant temperature +110oC;
• Inlet pipes G 3/4” or G 1/2”;
• Height from 300 mm to 900 mm;
• Length from 400 mm to 3000 mm.
• Thermal output depends on the type, height and length.

When choosing, you must use tables. Read more about choosing the power of a panel radiator here.

The video describes in detail the types of Kermi batteries, connection methods - side and bottom, how to connect different types of pipes and what is needed for this.