Among the brands that produce steel heating appliances, the undisputed leader is the German brand Kermi. The products of this company are distinguished by high quality, reliability and the introduction of modern technologies aimed at minimizing energy costs. In this article, we will review the types and technical characteristics that distinguish Kermi steel radiators.
Innovative Kermi Radiator Device
If the story about radiators is replete with clichés like “made from the highest quality sheet steel using the latest technology”, or “durable powder coating in any color”, then you will quickly become bored.
You will say - this is written on the website of any battery manufacturer, everyone praises their products. And you will be right, they write everything well, but how everything is actually done is a question. Therefore, let's go straight to the specific feature that distinguishes Kermi panel radiators from all others.
It would seem, what solutions can still be implemented in heating devices, when everything that is possible has already been invented? It turns out that not all. The Germans added internal piping to the radiators. This allows you to heat only the front panel of the device in the normal mode, there is no water circulation in the rear part. But as soon as the temperature in the room drops, the built-in thermostat will open the way for the 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 the alternate supply of coolant to the front and rear, the Kermi radiator received the prefix "therm X2" in the designation.
Types and characteristics of Kermi heating appliances
At the moment, the brand offers the following types of traditional steel batteries:
- profile therm X2 profil K (compact) and Profil V (valve);
- smooth therm X2Plan K (compact), Plan V (valve), Verteo Plan (vertical);
- with horizontal profiling of the front panel therm X2 line K (compact), Line V (valve), Verteo Line (vertical).
As for the types of radiators offered, under the Kermi brand, all standard types are produced from the 10th to the 33rd. Recall that the first digit in the designation indicates the number of heating panels, and the second - the number of convective fins. Type 22 is considered the most popular, where 2 panels and the same number of fins are used, as shown in the figure:
General technical characteristics of Kermi radiators are presented in the table below:
The listed 3 types of batteries externally differ in the type of profiling or its absence. While their heat transfer performance is somewhat different. It should be noted that the power of Kermi radiators is declared by the manufacturer in relation to the installation length. Therefore, first we will give a table of the thermal power of 1 m of profiled devices (therm X2Profil) depending on the height, type and operating temperature graph of the coolant:
Note. Since vertical-type steel batteries Kermi therm X2 Verteo are used less often than traditional ones, we will not give their characteristics here. The relevant tables can be found on the manufacturer's website.
Wiring diagrams
All three types of products provide side and bottom connection of Kermi radiators, and the connections for connection from below can be located in three options to choose from: right, left and in the middle. The lower connection method is provided in all valve devices (at the end of the designation is the Latin V), and the side connection is in compact ones (the letter K in the designation). The internal wiring is clearly visible on bottom-connected batteries:
For the reliable operation of their products and the full functioning of the X2 series switching effect, the manufacturer requires that the connection be made in accordance with certain requirements.
The diagram of how to connect radiators with side connection is shown below:
Advice. After purchasing and installing the Kermi battery in its place, carefully read the instructions that come with it. It details how to correctly install the separating plug in the return line of the appliance when it is operated in a one- or two-pipe heating system. This plug provides the X2 function (panel sequencing), so you can't go wrong here.
It is also possible to connect a radiator from different sides from below, as is customary in the popular Leningradka one-pipe heating system. But in this case, the separating plug is not installed, the X2 effect does not work, and the heat transfer value of the battery is reduced by 8%.
Valve radiators, in which the connecting pipes are located at the bottom, are not allowed to be connected from the side on any side, but only as required by the manufacturer. The following figure shows the installation diagram of a radiator with a bottom connection:
In a situation where, when replacing old heaters with new ones, the center distances of Kermi batteries may differ from the previous ones, the situation can be corrected using special adapters. Their installation allows you to adjust the distance between the pipelines without dismantling or altering them.
Conclusion
Kermi radiators are a high-quality product manufactured using high technology, and therefore a priori cannot be cheap. This is the only drawback of these devices, which you will have to put up with if you want to have warmth and comfort at home for many years.
A note for buyers about Kermi Type 22 radiators, specifications, reviews, questions. Differences between Kermi FTV and Kermi FKV 22. Battery coating features. An example of calculating the center distance for Kermi radiators.
To create warmth and comfort in their home, many choose Kermi brand radiators. This is a German company that has been producing various models of steel panel radiators for more than half a century. Despite their compactness, they have excellent heat transfer performance. And attractive appearance allows you to fit batteries into any modern interior.
The most popular model is Kermi 22 500 500 . The device consists of two steel panels, between them there are two convectors, which are made in the form of U-shaped fins. A distinctive feature is the use of the unique Kermi Therm x2 technology in the manufacture of batteries. Due to the special design, the coolant first enters the front panel, so that the air in the room is heated first. The back panel heats up later and works like a screen.
By the way, before the introduction of the Therm x2 innovation, Kermi radiators with a bottom connection had the abbreviation FKV, but they have already been discontinued.
Specifications Kermi 22 type:
- The maximum coolant temperature is 110 degrees Celsius.
- Power depends on size. With a temperature regime of 90/70/20 and dimensions of 500x500, the power Kermi 22 radiatorsis 965 watts.
- Working pressure - 10 atmospheres.
- The maximum crimping pressure is 13 atmospheres.
- Thickness - 100 mm.
- Height - from 200 to 900 mm.
- Width - from 400 to 3,000 mm.
- Center distance - for FKO, 54 mm must be subtracted from the height, for example, for the Kermi 22 500 500 Radiator, this value will be 500 mm - 54 mm = 446 mm; for FTV, the distance between the tubes is 50 mm.
- Standard color is white Kermi RAL 9016
There are two versions depending on the type of connection.
1. RadiatorsKermi FKO 22. These are models with lateral connection, piping is carried out on the left or right.
2. Radiators Kermi FTV 22. Batteries with bottom connection. The advantage over FKO 22 is the ability to hide pipes in the floor or under the skirting board. Due to the increased complexity of manufacturing these devices, and also because of their high aesthetic qualities, the cost of Kermi FTV is higher.
Regardless of the type of connection, the steel Radiator Kermi Type 22 recommended for installation in closed heating systems. In this case, the circulation can be natural or forced, the system is one- or two-pipe.
Upon purchase, the device package includes a plug, a Mayevsky valve - a valve for bleeding air, a set of wall mounts. AT radiators Kermi 22 type with bottom connection built-in thermostatic valve, which allows you to install equipment to control the air temperature in the room.
Kermi panel radiators have an advantage over their counterparts - they are coated with iron phosphate and two layers of varnish. Such processing significantly increases the service life!
Externally, the radiator looks modern and stylish. It will not only warm your home, but also become a stylish part of the interior. The ideally white surface is a lacquer coating that, when heated, does not release toxic substances into the air. On the sides, the radiator is closed with solid panels, and on top - with a grille.
Kermi radiators are found in approximately 80-90% of stores selling heating equipment. It is easy to make sure of 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 endurance, and their variety allows you to heat rooms of any type. Therefore, we decided to dedicate a separate review to Kermi. In it we will tell:
- About the technologies used in production;
- On the technical characteristics of radiators;
- About the advantages and disadvantages of Kermi products;
- About the most demanded models.
Finally, we will publish user reviews.
Technical characteristics of Kermi radiators
Kermi heating radiators are made in Germany. It immediately becomes clear that we are dealing with high-quality German products - they simply do not have anything else. Having started its activity in 1967, Kermi achieved brilliant results and became one of the leaders in the heating market. As of 2016, it produces the following lines of radiators:
- Profile;
- smooth;
- Radiators of the Line series.
Types and dimensions of panel radiators of the German manufacturer of heating appliances Kermi
Technical characteristics of Kermi radiators include the following parameters - height, length, depth, number of rows and number of rows of convective fins. The following types of radiators are on the market, indicated by numerical indices.
- Type 10 are single row devices without convective fins.
- Type 11 - single row radiators with one row of fins.
- Type 12 - two-row Kermi batteries with one row of fins.
- Type 22 - two-row radiators with two rows of fins.
- Type 33 - three-row batteries with three rows of fins.
The depth of the radiators varies depending on the type. For example, therm-x2 Profil-V single row models are 61 mm deep, double row 100 mm and triple row 155 mm. If you need low batteries, you should pay attention to profile models with a height of 200 mm. Also on sale are vertical radiator panels Verteo Profil, which have an excellent appearance and a fairly large height.
The list of important technical characteristics should include the type of connection. The V index is bottom-connected batteries, the K index is side-connected batteries.
Kermi profile heating radiators is a line that includes compact models with a height of 200 mm or more. These include the therm-x2 Profil-V, therm-x2 Profil-K and Verteo Profil product lines. The segment of smooth radiators includes the therm-x2 Plan-V, therm-x2 Plan-K, Verteo Plan, therm-x2 Plan-K replacement series (designed for quick and painless replacement of old batteries without altering the heating system) and therm- x2 Plan-V hygienic (for use in environments with strict hygiene requirements). All of these lines are characterized by a sleek design.
Radiators of Kermi of the Line series differ in attractive design. They are able to fit into any interior.
Kermi Line series batteries have an attractive front panel design – they are able to fit into any interiors. The series includes the therm-x2 Line-K, therm-x2 Line-V, therm-x2 Line-Hygiene, Verteo-Line and therm-x2 Line-K replacement lines (for the repair and modernization of old heating systems).
What does therm-x2 mean in the name of the rulers? This is an energy-saving technology used in the development of Kermi heating radiators. Thanks to this technology, the heating time is reduced and the efficiency of the heating system is increased. The water entering the batteries passes first through the front panel, and only then goes to the rear. This design provides a quick supply of heat to the premises. Today, therm-x2 technology is used in all Kermi batteries.
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 goods made in Germany. Let's start with the key benefits:
Kermi Therm-x2 technology will save you money thanks to the special circulation of the coolant in the radiator.
- High efficiency due to the applied therm-x2 technology - provides a reduction in heating costs;
- High-quality steel base - ensures a long service life;
- Pressure resistance up to 10 atmospheres - test pressure for many models is 13-14 atmospheres;
- An abundance of models - for any interiors;
- The presence of built-in thermostats (typical for some models);
- Rapid heating of rooms - provided by therm-x2 technology.
As for the shortcomings, there are very few of them:
- Lack of water hammer resistance- steel does not 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.
Popular models of Kermi radiators
The best-selling model of Kermi radiators - FKO 11 900
The market leader was the Kermi FKO 11 900 model. Their length varies from 400 to 3000 mm, power - from 770 to 5778 watts. The maximum working pressure is 10 bar, the volume is from 1.8 to 13.5 liters. The design of batteries is wall-mounted, connection to the heating system is lateral. If you need more compact batteries, you should look at the Kermi Therm-X2 FKO 22 200. Their height is only 200 mm, length - from 600 to 3000 mm, power - from 406 to 2034 watts.
The third in the list of popular was the radiator Kermi FTV (FKV) 10 600. The height of the product is 600 mm, depth - 46 mm, length - from 400 to 3000 mm. Power varies from 140 to 2466 kW, volume - from 1.26 to 9.45 liters. There is no convective finning here, the connection is at the bottom. If you need batteries with a flat design, you should pay attention to the Kermi therm-x2 PTV 22 905 model. Its power ranges from 929 to 6892 W, height - 905 mm, volume - from 3.62 to 26.89 liters.
Kermi battery reviews
Most reviews of Kermi heating batteries are positive. And this was to be expected - the high build quality and the use of good-quality raw materials affect. Adding here the German desire to make the right and durable things, we get excellent radiators for private houses and apartments. Read reviews of Kermi products in our review.
My apartment is in need of renovation. Therefore, when I retired, I immediately ripped off the floors, tore off the wallpaper, and threw away the old furniture and chandeliers. Since such a dance has gone, I decided to change the batteries. I didn’t hear anything about modern batteries, so I succumbed to the persuasion of the sellers - they advised German-made Kermi radiators. I readily believe the Fritz, they know how to make things of high quality and durable. Therefore, I didn’t have to think long, I chose Kermi. For 3 years now they have been pleasing me and my wife with warmth and good appearance. There were no leaks, so we and our neighbors sleep peacefully.
The Kermi trademark belongs to the German holding AFG Arbonia-Forster-Holding AG. Steel panel radiators are produced under this brand. At a considerable price, the demand for them is stable - the quality is high, the technical characteristics allow them to be used not only in individual, but also in centralized heating systems (with some restrictions).
Design features
Any panel radiator consists of steel plates connected in pairs. In the plates, the channels through which the coolant moves are squeezed out by stamping. There are two horizontal channels - one above, one below, and a large number of vertical ones. Plates connected in pairs are assembled into radiators one, two or three pieces each. To increase heat transfer, convective fins can be welded to them - corrugated steel sheets of small thickness. They are located behind the front panel and do not spoil the appearance, and are covered with covers on the side and top.
Kermi batteries are made in exactly the same way. They differ in the order of supply of the coolant. All of them are parallel. This means that liquid of the same temperature is supplied to all panels in the radiator. This method of feeding works very well at high temperatures in the network. 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 stream is fed to the first panel, and then to the second and third. Thus, the part that faces the room turns out to be the most heated. And the second and third are all 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 less. 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 heat the room well even in low-temperature operation. 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: from any type, .
One more novelty is applied in these radiators. The firm establishes balanced Balancing parameters were determined as a result of research. All bottom-connected steel radiators are shipped from the factory with thermostats balanced and adjusted (thermal head must be purchased separately). By installing such a heater, you get a stable temperature in the room: the amount of coolant that is required to maintain the temperature is supplied to the collector. You need to change the setting if you are not satisfied with the set mode. Using a thermostat is not only comfort, for individual systems it is also an opportunity to save money: only the right amount of fuel is spent on heating.
There are some more features in connecting Kermi radiators. Side and bottom piping options are available. Moreover, the bottom can be not only right or left, but can also be located in the center. This allows you to make wiring without being tied to the presence of heating devices. They can generally be installed after finishing work is completed (only you will need to first fix the brackets on the wall).
Models of Kermi panel radiators
There are two main types: smooth and profiled. Smooth ones have an absolutely flat front panel - they are called Plan, profile ones are called Profil - and have the usual slightly corrugated surface.
In the group of smooth radiators there are Plan-V models, which are marked as FKO. These are the same Kermi radiators with a bottom connection, and in three versions: left, right, or in the center.
The Plan-K models are the side connection option (FKV marking). This group has an option for replacing old cast-iron radiators - with a center distance of 500 mm and 900 mm. In this case, it will not be necessary to digest the eyeliner (if the pipes are in good condition).
FKO and FKV radiators are available in types 10, 11, 21, 22, 33. The first digit is the number of panels through which the coolant flows, the second is the number of additional convective plates.
In the group of smooth panel batteries there is Plan-V hygienic - without additional ribs and covers. Such models are required for medical institutions or for those who suffer from allergies. A large number of ribs contributes to the accumulation of dust, and small distances between the plates make cleaning difficult. The hygienic version is devoid of this disadvantage.
There is an unusual Kermi Verteo Plan. This is a vertical smooth panel radiator. It is useful in cases where the place to install a wide radiator can not be found. But you need to keep in mind that its working pressure is lower than that of all other models - 6 bar.
Kermi profile radiators are available in two versions - Profil -V and Profil -K - lines with a lower (V) and side (K) connection. There is also a modification of vertical radiators Verteo Profil. The types of these panel batteries are the same, slightly less deep (by 2-3 mm).
Radiators "Kermi": characteristics
Smooth and profile models with side and bottom connection have the following technical characteristics:
- Working pressure up to 10 bar;
- Test up to 13 bar;
- Maximum coolant temperature +110 o C;
- Inlet pipes G 3/4” or G 1/2”;
- Height from 300 mm to 900 mm;
- Length from 400 mm to 3000 mm.
- The heat output depends on the type, height and length.
The video details the types of Kermi batteries, the connection methods - side and bottom, how to connect different types of pipes and what is needed for this.
Operation features
Any radiators require cleaning from dust two or three times a season: dust greatly reduces heat transfer. In addition, in the currents of warm air, it rises to the top, and can cause allergy attacks. But some models (except type 10 and hygienic) of panel radiators are closed on all sides: there are side covers and a grill at the top. From the outside, no latches or other fixtures are visible.
There is only a plastic Kermi logo on the side panel. Here he is the key. Pull the left edge of the logo towards you, turn it down a little. A hole opens. But the logo still needs to be turned counterclockwise until it unscrews (it screws onto a threaded plastic pin, so don't pull too hard). But the left edge needs to be pulled back all the time - there is an influx-lock that can scratch the paint. After you remove the logo, you can pull the side plate down to release it from the latches. If there is a valve in the model, first remove the left panel, there is a valve on the right and interferes. After removing the sides, the lid does not hold anything. Can be cleaned.
The assembly is in the reverse order: install the upper grille, then the sidewalls (first the right, then the left), and then the logos.
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The required heat output of Kermi radiators depends on:
- area of the premises;
- the volume of the room;
- room heat loss;
- characteristics of the heating system.
Determining the power of radiators based on the area
Building codes determine the average heat consumption per 1 m2 of the floor of the room - 100 W. This is a very approximate indicator, so they often resort to using the formula Q \u003d (2So + Sp + Sns) (0.54Dt + 22), where:
- Q is the desired total heat transfer of radiators;
- Dt is the difference between outdoor and indoor temperature;
- So is the window area;
- Sp - floor area;
- Sns is the area of "street" walls.
When choosing the Kermi model (radiators), the power is calculated according to this formula, but taking into account the heat losses inherent in a particular room. Experts can determine the exact indicators.
Determining the power of radiators based on the volume of the room
According to building codes, one cubic meter of space 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 an 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 middle climatic zone and without taking into account the correction, which depends 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 outer wall - 1.1;
- 2 external walls and 1 window - 1.2;
- 2 external walls and 2 windows - 1.3;
- 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 will be 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 obtained heat transfer by the required coefficients - 1377x1.2x1.5 = 2478.6 W. The rounded result is 2480 watts.
This number is relatively accurate, but the matter is not limited to the mentioned coefficients. Specialists in thermal calculations take into account what material the walls are made of, the characteristics of the rooms located around, etc. But subject to average indicators, this number can be used. To determine the type of batteries, the Kermi radiator power table is used.
Choosing the type of Kermi radiator, taking into account the required power
The table shows the power of various brand radiators. Red highlighted values suitable for our case. These batteries can be installed indoors with similar characteristics.
But for Kermi radiators, the power table only works if the average values \u200b\u200bof the temperature of the coolant and air in the room are observed:
- coolant t (supply) - 70 degrees;
- coolant t (return) - 65 degrees;
- t air - 20 degrees.
If the system characteristics differ from the average, it is required to multiply the received power by another factor. The latter can be determined using a table.
