Low and long heating radiators

Having the appropriate heating system in our homes is essential to keeping them warm and comfortable. Long and low heating radiators are one option that’s becoming more and more popular. These cutting-edge radiators are a desirable option for homeowners wishing to increase comfort and energy efficiency because they provide a number of benefits over conventional heating techniques.

Heat is dispersed evenly throughout a room by low and long heating radiators, preventing cold spots and guaranteeing constant warmth. These radiators are longer and lower to the ground than standard radiators, which are usually tall and narrow. This gives them a larger surface area from which to radiate heat. This design lowers energy consumption and increases heating efficiency, which in turn lowers heating bills.

The placement flexibility of low and long heating radiators is one of their main advantages. These radiators can be positioned under windows or along walls without obstructing views or taking up important floor space because they are lower to the ground. They are perfect for both new construction projects and retrofitting existing homes with contemporary heating solutions because of their placement flexibility.

Low and long heating radiators have aesthetic benefits in addition to their practical ones. These radiators’ elegant touches add a touch of sophistication to any space, complementing any interior décor style with their sleek and minimalist designs available in a variety of finishes. There is a low and long heating radiator to fit your style, whether you like a more traditional appearance or a more modern one.

All things considered, long and low heating radiators provide a practical, cost-effective, and fashionable way to maintain a warm and cozy home. It’s not surprising that an increasing number of homeowners are selecting this cutting-edge heating option for their homes given its even heat distribution, energy-saving features, and adaptable design choices.

Benefits Drawbacks
Efficiently heat rooms over a longer period Take time to reach optimal temperature

Spheres and features of application, effectiveness

Due to altered building regulations, narrow batteries are now a viable substitute for regular batteries. Stained glass and panoramic windows are perfect for them. In addition, dimensional batteries don’t always fit in restrooms, balconies, or bathrooms. Low batteries practically have the same efficiency as standard analogues due to their small size, provided that no compromised technologies are used during installation.

Low horizontal structures are employed in small spaces with low partitions, walls, or expansive windows. Because they are so small in size, they are also essential for tiny loggias and balconies. Narrow horizontal batteries are also installed in long hallways and rooms.

The primary characteristic of these radiators is not their size or dimensions, but rather how well they warm the space: the longer and lower the heating element, the more evenly the room’s temperature rises and the air’s overall volume warms more effectively.

The lowest heating radiators

The standard radiator height is 500 mm, but it is also sometimes used at 300–400 mm. Raising the device at least 60 mm above the floor is still crucial, though. 2020’s smallest heating batteries measure 155 mm in height. These include, for instance, Vogel & Noot Delta 155 or Purmo Delta 155 steel tubular. The horizontal steel tubular radiators, which come in four sections, are a little taller at 180 mm. For instance, it’s Guardo Retta 6p 180 or Loten Grey Z 2000 for 4 sections.

Radiators with an intended distance of 150 mm are the lowest among steel panel, aluminum, and bimetallic panels; however, exercise caution—the device’s full height is typically 200 mm. There is a vast array of options among these devices, as nearly all reputable manufacturers produce them. We will still take into consideration the best of these models in more detail.

Heating convectors

The floor heating convectors can have a height of 80 mm (Savva KN 80) or 130 mm (Kzto Radiator Elegant Mini 130×130). Although the principles underlying their operation are different, these devices are frequently mistaken for heating radiators. Coolant flows through pipes with numerous metal plates on them in convectors. As a result, the device’s radiation area grows, heat transfer happens more quickly, and air convection is created by the design. Convectors are highly efficient and have a larger area of heating elements despite their much smaller dimensions.

Convectors offer a multitude of benefits in general.

  • Fast and uniform heating of the premises. Five minutes and the room is warm. Radiators will need one hour for this;
  • the long service life of some models (copper-aluminum);
  • the ability to embed devices on the floor;
  • The return is already heat at 35 ° of the coolant. In most batteries, this indicator is 65 ° C.

However, because convectors heat air primarily through convection rather than radiation, they can withstand dust accumulations and help to dry the air more thoroughly. In contrast to radiators, there are additional drawbacks:

  • cool faster;
  • more expensive 1.5-2 times;
  • soft materials of heat exchangers are easier to deform.

Both consume the same amount of heat.

Reviews of low heating devices: Advantages and disadvantages

Advantages Flaws
Small dimensions that allow you to install devices under any windows, as well as in rooms with insufficient free space High cost compared to standard products. For one narrow battery you have to pay 2-3 times more
More comfortable heating, the lower and longer the heating device, the smoother the temperature of the room and the entire volume of air warms up better Less effective, because with the same width they have a smaller heat exchange area, and it is not always possible to install extremely wide radiators
Models of 200 mm high have a wide selection (any of the materials, almost any manufacturer, different colors) More demanding on the quality of the coolant. According to owners, some models of a complex design are quickly clogged. This leads to air traffic jams
Stylish and modern appearance, most models do not need to be hidden from the eye Less service life
The small volume of the coolant (with the exception of steel tubular) makes the system more inert and functional Slightly more complex installation

Types depending on the material of manufacture

Cast iron

This material’s radiators are becoming well-deservedly famous. They are now performed in a traditional as well as a modern manner. Additionally, unique decorative floor samples are produced.

Cast iron goods come with a few benefits.

  • high resistance of cast iron to the adverse effects of the coolant and corrosion;
  • a huge service life of 30 years or more;
  • batteries heat up for a long time, but cool slowly.

But there are far more drawbacks than benefits:

  • low resistance to hydraulic impacts, they are able to withstand up to 10-12 atm (which is not always the limit in the apartments of high apartment buildings);
  • low heat transfer;
  • a large volume of the coolant, which even more reduces the efficiency of the heating system;
  • Light weight.
  • specific and, despite all the attempts of manufacturers, relatively monotonous design.

Nonetheless, cast-iron heating batteries are highly sought after due to their affordability and robustness.


There are two types of steel heating radiators: panel and tubular.

Panel radiators are made starting at 300 mm in height. This parameter has an alt height of 150 mm and starts at 200 mm for European manufacturers. This is the best choice in terms of cost and heat transfer.

Steel panel batteries’ benefits

  • optimal heat transfer;
  • Still low cost;
  • small volume of the coolant;
  • a huge selection of models with any connection method;
  • Aesthetic appearance.


  • instability to corrosion;
  • narrow channels that are easily clogged with poor -quality contaminated coolant;
  • intended only for closed heating systems;
  • wall thickness is only 1.25 or 1.4 mm;
  • Vulnerability to hydraulic boards of the central heating system (over 10-12 atm.).

With a height of 155 mm, tubular steel batteries can have an even more compact design and a more fashionable look. The range of depth is 50 to 250 mm. Low water floor radiators and their hinged counterparts are used in the same way.

Benefits of small tubular batteries

  • wide selection of width and depth;
  • a higher limit of permissible working pressure, often up to 15-25 atm.
  • large section of pipes;
  • attractive design;
  • large selection of decorative models;
  • Low hydraulic resistance.


  • tendency to corrosion;
  • large volume of the coolant;
  • smaller than panel analogues, heat transfer;
  • High cost of production, respectively, and price.
  • Designed for closed heating systems.


The height of aluminum radiators is 200 mm. These devices have a high thermal power (89–98 watts per section), but their application involves many subtleties.

Aluminum battery benefits:

  • extremely good efficiency;
  • light weight;
  • low thermal inertia;
  • Slight inner volume.

The quality of the coolant affects the devices. The PH indicator is required for stable work (7-8). Additionally, because aluminum reacts with copper pipes, heat exchangers, and other system components, they are incompatible with them. The technology used to manufacture the product has a direct impact on the working pressure. While cast models have an indication of 10–12 bar, extrusion models have 5–6 bar. These batteries are therefore more appropriate for autonomous systems. It is not recommended to use them in apartment buildings with centralized heating systems.


The radiators’ name implies that they are composed of two metals. Coolant collectors are composed of high-strength steel. Heat transfer is increased by the aluminum casing’s overflation on top. In the intersosteal distance, bimetallic radiators are identical to their aluminum counterparts. While keeping all of the benefits of aluminum radiators, this design is generally more sophisticated.


  • high threshold of permissible working pressure (30-35 atm.), the possibility of use in centralized and autonomous systems;
  • the highest heat transfer, from 140 watts to the maximum power market of 280 watts per 1 section (model Sira RS 800);
  • the ability to work with any coolant;
  • High service life, at least 20 years.

Bimetallic batteries are nearly impervious to flaws. Unless inertia radiators are very expensive and marginally less effective than aluminum radiators.

For a self-contained heating system capable of operating at three atms. Any type of radiator will work. Batteries for a 12-atm system are needed in an apartment where the system can support up to 10 atm. Cast-iron or aluminum batteries work well in heating systems where the coolant flows by gravity.

Heat transmission through heating radiators Analyzing and contrasting different indicators and computation techniques

In the world of home heating and insulation, the choice of radiators plays a crucial role in maintaining comfort and energy efficiency. Low and long heating radiators offer a smart solution for evenly distributing warmth throughout your living space. By extending closer to the ground, these radiators utilize natural convection currents, effectively heating the entire room from bottom to top. This design not only maximizes heat output but also reduces energy consumption by optimizing heat circulation. Additionally, their elongated shape allows for better heat retention, ensuring a cozy atmosphere for longer periods. Whether you"re renovating or building anew, opting for low and long radiators can significantly enhance the efficiency and comfort of your home"s heating system.

The minimum necessary thermal power

Houses are usually only thermally calculated once a year, so you have to calculate by rooms. Every radiator’s power should be 20% more than the boiler’s power. Heat loss for GOST-insulated buildings is 10 kW per 100 meters at ceiling heights up to 2.7 meters.

It is not always reasonable to count the number of radiators in every room in the area. Doors, windows, and walls all affect heat loss. It’s also not worth hanging an excessive number of batteries. But they ought to be sufficient to prevent the system from becoming too hot (beyond 70 °C).

A power distribution example can be found here:

  1. The interior room is heated by neighboring and can be equipped with a minimum number of radiators.
  2. The outer wall and window – 1 kW per 10 m 2 .
  3. A long outer wall and two windows – multiply the previous indicator by 1.2.
  4. Two external walls and window – multiply by 1.3.
  5. Two external walls and two windows – we multiply the primary data by 1.4 or 1.5.

This is how power is defined in relation to. A lot depends on other features of the home, such as the design and the dimensions of the windows and exterior walls. However, this kind of straightforward computation suffices for over 90% of typical Russian homes.

What else to pay attention to when choosing

Prior to purchasing low-profile batteries, you should consider a few product selection nuances. This will determine how efficiently the heating system operates. It is advised to consider the following factors in order to make prudent financial decisions:

  • Heat rooms equipped with panoramic windows is better than aluminum or bimetallic batteries;
  • It is better to heat own houses with an autonomous heating system with radiators of steel or aluminum;
  • The length of the radiator under the window should exceed the width of the window. This will create an effective thermal curtain over the entire area of the window;
  • It is necessary to clarify the working pressure in the system;
  • Determine the side of the connection of the battery.

Best famous manufacturers and models: characteristics and prices

Buderus Logatrend K-Profil 11 300

In Engels, Russia, the German company Bosch manufactures radiators under the Buderus brand. The products meet GOST requirements in full. Owners mention a large range of product sizes in their reviews. This company’s batteries are good because they don’t have a front and rear section. When the background is removed from the configuration, you can mount the battery from any angle.

The device is not particularly tall—300 mm—but it is sufficiently small—400–3,000 mm in length. The size of the battery and coolant temperature affect thermal power. The range of these indicators is 136–15,083 watts. The forced circulation method is intended for radiator design. A good and dependable coating and reasonably priced prices that are less than those of foreign, non-localized suppliers are additional benefits.

Among the drawbacks, the lack of even smaller models, which are 200 mm high, the flimsy brackets, and the challenges associated with dust removal could be mentioned.

Kermi FKO 22 200

This German-based Swiss company manufactures a broad variety of radiators for use in a variety of settings. Reviewers point out how batteries can be used in a variety of ways for design projects. They also enjoy a wide variety of products in terms of length. The manufacturer’s best radiators, known as Kermi FKO 22 200, combine the highest efficiency and tried-and-true quality.

Not to be overlooked is a durable, superior coating made with KEF technology, which is currently the most efficient and eco-friendly available. produced with a 510–2 210 W capacity and lengths ranging from 600 to 2,600 mm. Ten bar of working pressure. Only the exorbitant costs are a drawback.

Purmo Ventil Compact 200

Since the 1950s, the Finnish company has been manufacturing steel radiators. Radiators measure 200 mm in height and 600–3,000 mm in length. Radiators have four side and two bottom connecting holes with internal threads, making them a feature of a universal connection type. There is a thermostat included in the basic setup already. Any color execution is permitted under the order. The gadgets are generally regarded as dependable and trouble-free.

Depending on the length, thermal power can range from 589 to 2,942 watts. Ten bar is the highest working pressure that is allowed. The steel thickness, which is 1.2 mm in accordance with EN-442, is sufficient but not as good as some models that have 1.4 mm of thickness. The only drawbacks are the expensive devices.

Radena CS 150

Bimetallic heating radiators that are 250 mm high but have an interaceal distance of 150 mm. The vertical and horizontal collectors are thoughtfully shaped differently, with the former having a wide ellipse that greatly reduces hydraulic resistance. It’s also important to note the walls’ 1.9 mm thickness based on the features. The radiator’s coolant volume is minuscule, with 0.13 liters per section.

Maximum working pressure is 25 atm, and 120 watts of heat transfer per section. The length of the device is up to 1,184 mm, and there may be six to sixteen sections total. Please be aware that the radiator’s threaded connection has a non-standard diameter of 1 inch.

Loten Grey Z 750 180 mm

This brand of Russian steel tubular batteries features thermally conductive profiles positioned horizontally. High-quality materials and the newest technologies were used in the production. Products are thus very robust and long-lasting. It is important to note that radiators are a very attractive design that can be made in any RAL color. The quantity of materials used by the company is not reduced. The pipe walls have a thickness of 2.5 mm.

With a total heat transfer of 366 watts, the battery in this low version has just 4 sections and a width of 750 mm. Radiators can be installed in any closed system since the design allows for operating pressures of up to 16 atm. It is possible to establish a connection that is lateral or lower, depending on the execution variation. Despite all the benefits—these are among the least expensive tubular heating devices—the drawbacks are hard to identify.

Rettig Column H-2x200x700

An additional steel tubular model from the Finnish company, manufactured in Germany, featuring horizontal sections. Although they have an attractive design, are paintable in any color, and don’t raise concerns about dependability, their technical specs aren’t as good as those of the previous Grey Z. Heat transmission across a width of 700 mm is 319 watts, or kW/m – less. Since 10 atm is the lowest allowable working pressure, not all apartment building heating systems are appropriate for radiator use.

Possibly lateral as well as lower connection. The shortcomings are harder to locate and cost even less than with Loten Grey Z, in addition to having inferior technical qualities.

Cost: 7,800 rubles.

Selecting an appropriate heating system for your house is essential for both energy efficiency and comfort. Long and low heating radiators have a number of advantages that make them worthwhile to take into account. First off, because of their bigger surface area, the heat is distributed more effectively throughout the space, maintaining a more even and cozy temperature. Their smaller profile can also save space in smaller rooms and be aesthetically pleasing.

The capacity of low and long radiators to function at lower temperatures while still producing adequate warmth is one of their main advantages. This helps to extend the life of your heating system in addition to lowering energy usage. These radiators can further lessen your carbon footprint by working at lower temperatures and being compatible with renewable energy sources like heat pumps.

Long and low radiators are simple to install, especially in retrofit scenarios where space may be at a premium. They fit in well with both traditional and modern interiors thanks to their elegant design and flexible mounting options. For best results, it’s crucial to speak with an expert to guarantee appropriate sizing and positioning.

In summary, long and low heating radiators provide an effective, room-saving, and visually beautiful way to heat your house. Their even heat distribution and capacity to function at lower temperatures make them a desirable choice for homeowners seeking to increase comfort and energy efficiency. When selecting the ideal heating system for your home, it is important to take into account elements like room size, insulation, and heating requirements.

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