Let’s choose the radiators for the apartment

What types of radiators are better: a comparative review of all types of heating batteries

The duration of the heating season in our latitudes is close to 2/3 of the year. The figure depends on the region, but on average it’s about 250 days. All issues related to the efficiency of the heating system are extremely important to us, which largely depends on the right choice of its devices.

Let’s break down what kind of heating radiators are better, how varieties differ. The article presented for review describes in detail the criteria for selecting heating devices. For do-it-yourself homeowners, we have listed tips from experienced plumbers.

For a private house or apartment?

There are dozens and hundreds of companies that specialize in the production of radiators. The competition is frantic. Marketers keep on coming up with new arguments in favor of their products. This makes the choice of characteristics richer, and making the purchase by the average buyer. more difficult. Let’s start with the simplest.

If you need a device for a private house or apartment with an individual heating system, then choose by power and design. Т.е. you saw the model you liked in appearance, chose the capacity/size. and that’s it. For an apartment in a multi-storey house, where the coolant is supplied by pipes of centralized heating system, you should also take into account the operating pressure set by the manufacturer. It should not be below 10-12 atm. Otherwise, the design will break when the water supply.

And now let’s deal with the types of radiators for heating, traditionally presenting the data in the form of a “tiny” table.

  • it is convenient to vary the capacity of the device by changing the number of sections
  • – collapsible design
  • – risk of leaks in the joints if the quality of the gaskets is low
  • similar to the sectional, but without their disadvantages
  • – high cost
  • minimal risk of leaks, it is easier to match the size, the rapid temperature control RO (due to the smaller volume of coolant inside)
  • – many models are designed for relatively low pressure and are only suitable for private houses, where a heating system with a circulating pump is provided
  • durable, inexpensive
  • – heavy, only sectional, with high thermal inertia, which does not allow you to quickly adjust the temperature in the room, the design of available devices to the amateur. more interesting models are expensive
  • a variety of types of structures made of this material, rapid heating, affordable price
  • – susceptibility to corrosion, caused by the use of low-quality alloys. Due to the relative ease of production, you can come across inexpensive products of unscrupulous manufacturers. Accordingly, such companies use the cheapest steel, and the thickness of the radiator walls is minimal. All this causes RO failure in a short period of time.
  • are light and durable, easy to install, due to low thermal inertia allow you to quickly change the temperature in the room
  • – more expensive than steel, due to the special requirements for the heating medium. suitable only for individual heating systems (in private houses or apartments with a heating boiler)
  • are considered more durable than aluminum and steel
  • – high price
  • long-life, high heat dissipation
  • – direct connection to steel pipes is unacceptable, high cost, impossibility of painting

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Before choosing a radiator you need to check the maximum pressure value in the heating system. Remember that all radiators are suitable for the central heating system, except aluminum radiators!

We are often asked how to choose the right radiator according to its wattage. To make life easier for you and us, we have developed a handy calculator. ♪ Use it in good health ♪!

For those, who want to estimate the heat power by themselves, we can use the following method. Determine the required values per unit area of the room: 100 W/m 2. one window and one exterior wall; 120 W/m 2. one window and two exterior walls (corner room); 130 W/m 2. two windows and two exterior walls (corner room). For example, we have a corner room with two windows of 20 m2. Then the approximate power of the RO will be: 20 × 130 = 2600 W. Let’s make a correction to the fact that the radiators specifications are tied to the ideal conditions of the device. 10% is enough. Total heat power requirement: 2600 × 1,1 = 2860 W.

It remains only to decide on the model you want, which you can find among the 20 units we selected.

Brief characteristics of the RC models from the rating

Brand and country of production Model and dimensions of section / panel (W×HW×D) Material, nominal heat output per section / panel, W Approximate price per unit / section
1. Global (Italy) STYLE PLUS 500 (80×575×95) bimetal, 185 from 1041
2. RIFAR ALP-500 (81×570×75 mm) bimetal, 158 from 630
3. SIRA (Italy) RS 500 (80×572×95) bimetal, 201 from 850
4. RIFAR Monolit 500 (80×577×100) bimetal, 196 from 850
5. Royal Thermo (Italy) PianoForte 500 (80×591×100) bimetal, 185 from 1500
6. Global (Italy) ISEO 500 (80×582×80) aluminum, 180 from 790
7. Thermal Standard Plus 500 (79×531×72) aluminum, 198 from 400
8. Oasis Al 500/80 (79×531×72) aluminum, 170 from 420
9. Sira (Italy) ALICE ROYAL 95/500 (80×580×95) aluminum, 190 from 560
10. Royal Thermo Indigo 500 (80×591×100) aluminum, 185 from 630
11. Buderus (Germany) Logatrend K-Profil 33 300 1200 (1200×300×155) steel, 670 from 2000
12. KZTO Harmony 2-500-12 (70×545×80) steel, 180 from 2250
13. Lideya (Belarus) Type 22 500×1000 LU 22-510 (1000×500×47) steel, 697 from 2850
14. Kermi (Germany) 22 0510 (1000×500×100) steel, 965 from 2650
15. Viadrus (Czech Republic) Styl (60×580×130) cast iron, 70 from 1500
16. MZOO (Belarus) MS-140M-05 (104×588×140) cast iron, 160 from 500
17. EXEMET Modern 3-745/600 (45×745×100) cast iron, 102 from 2000
18. Terma (Poland) Aero H (325×900) steel, 290 from 41000
19. Arbonia (Switzerland, Germany) Karotherm KM90 (500×943×22) steel, 481 from 100000
20. GuRaTec (Germany) Apollo 765/05 (76×768×250) cast iron, 145 from 6600

Calculation of heat output according to the basic formulae for easy selection

Heat output is an important factor in choosing a radiator. Calculated on the basis of the area or volume.

choose, radiators, apartment

By area

There are building standards for heating needs in the room:

To make a calculation of the necessary amount of heat to multiply the area of the room by the desired figure given above. To eliminate the risk of error, it is better to choose the upper limit of the norm.

It is acceptable to make a calculation with a small margin.

By volume

In order to find out how many sections a radiator should contain, you can do the following calculation based on the volume of the room. The height of the ceilings determines how much heat is needed to heat the entire apartment.

The formula remains the same: calculate the volume of the room, multiplying the area by the height of the ceiling, determine the amount of heat needed:

  • To heat an apartment in a panel house for 1 sq. One meter of air needs 40 W, the number of sections is 9.75;
  • In a house made of bricks. 35 W, the number of sections. 8,5.

Nuances of choosing a radiator

Now let’s analyze a few special cases and other parameters that will help you finally understand what radiator heating is better to choose for an apartment or private home.


The main condition when choosing a radiator for heating in an apartment building: the heater must withstand the working pressure in the riser system of the high-rise, that is not less than 12 atmospheres

For this reason, steel panel radiators for high-rise buildings are not suitable: their working pressure is only 6 atmospheres. And among the sectional radiators you can choose any radiator for the apartment. Of course, also taking into account the operating pressure of a particular model, which can be found in the technical passport of the device. With how to choose radiators for the house, everything is a little easier: you can put there any radiator you like, regardless of its working pressure.

Radiators for pump and gravity heating systems

Pump heating system is also called forced: the water in their pipes is driven by a pump. For such a system you can choose any type of radiator: aluminum, bimetallic or steel panel radiator. with the restrictions on the operating pressure, which we have already mentioned above.

In a gravity, or natural, heating system, there is no pump. Water in it gets to the radiators according to the laws of physics: under the influence of gravity and through the expansion of water when heated

The density of hot water is less than cold water, so the boiler starts to move upward by gravity along the contour, gradually transferring heat to the radiators, and when it cools down, it goes back in a circle to the boiler.

For the natural system is very important that the flow of water through the pipes was free and nowhere held, so for the sectional radiators, the diameter of the tubes that connect the upper collector to the lower. water flows through them to fill the radiator. Bimetallic for gravity flow will not work: in it the intercollector tube is too narrow. It is better to choose aluminum or cast iron.

How many radiators do you need?

With the type decided, now it’s time to talk about their number, sufficient to keep the house warm.

Please note!

The general rule for calculating the number of radiators per room is: one radiator under each window

But it should not be strictly adhered to for several reasons. First, there are exceptions to every rule, and the radiator is not placed under the window if:

it is a dormer or a small dormer

The space under the window is occupied by stationary furniture that cannot be moved, such as kitchen cabinets. It makes no sense to put a radiator inside a cupboard, because it will only heat this cupboard and nothing else. And by the law of meanness, it is the heater, which is the most difficult to reach, will leak first.

Secondly, there are reverse situations when there are no windows in the room, but the radiator must be installed in it: we are talking about e.g. bathroom, hallway, anteroom or other small rooms where you do not want to freeze.

That’s why the calculation of the number and the choice of the radiator for each house cannot be reduced to one formula. It all depends on its layout and personal preferences of the owner.

Radiator capacity

Most often, the required capacity of the radiator is proposed to calculate based on the area of the room in which it will stand: 100V/kv.м. But that’s not quite right.

The main task of the radiator. compensate for the heat losses through windows, roof, floor, therefore it is not the size of the room that is important, but its location in the house: what floor, how many windows, how many walls are in contact with the street. That is two rooms with the same size will have different heat losses if one of them has two windows and the other one has. only one.

Therefore it is possible to estimate approximately required power of radiator by area, but it is obligatory to do a correction on heat losses:

100 W/sqm.м

In a room with one exterior wall and one window


for premises with two outside walls and one window

130 W/sq.m.м

in rooms with two exterior walls and two windows

Also remember that rooms on the first and last floors of buildings, especially directly under the roof, lose much more heat than medium-sized rooms, and you should choose radiators more powerful. Sectional radiators allow you to increase the power and heat output of an individual unit, if necessary, by adding additional sections. But in the steel panel radiators with the parameters will have to be determined at the stage of purchase.

With the right choice of radiator heat output equals but does not exceed the heat loss of the room. If this condition is met the boiler is stable, the thermal head does not have to open and close the radiator all the time, and it, respectively, wears less.

choose, radiators, apartment

Types of batteries and their connection

The variety of heating radiators on the market is really striking. And it is especially difficult to make the right choice for an untrained user.

Therefore, within the framework of our article, we will try to consider in detail the varieties of heating devices, paying attention to their key characteristics, and give recommendations for choosing the appropriate option, based on living conditions, type of heating system and the specific requirements of the owner.

Principles of classification of radiators for apartments

As the coolant in centralized heating systems is usually used heated to 95 ° C water. It is used not purified distilled but technical with dissolved salts and additives.

As a result, the material from which the battery is made in the apartment, must long time safely withstand the effects and temperature fluctuations, and moisture, and impurities contained in the coolant.

To serve for many years, the radiator for heating the apartment should:

  • withstand working pressure of up to 9 atm (ideally 12-15 atm);
  • To be made of metals resistant to chemical and electrochemical corrosion;
  • Have a high heat output.

Pressure in the apartment radiators varies between 4-7 atm. Much depends on the number of floors in the apartment building, the temperature outside the window and the conditions of the heating system. But during hydrostatic pressure test and shock the pressure can rise briefly up to 15 atm and higher.

All heating radiators are made of metals (aluminum or iron). only they can withstand the working loads generated in heating systems

Also, the heater in question should be easy to install, have a presentable appearance and low cost. But, most importantly, it should have excellent characteristics of heat dissipation.

The main task of the radiator is to give the room the heat that comes through the pipes with water. The more efficient it does it, the better for the owner of the apartment.

There are two main criteria for classifying heating batteries:

All other parameters are already technical characteristics of a particular radiator model.

Cast iron radiators for heating the apartment

Cast iron radiators in apartments today buy rather rarely. They are heavy, do not look modern, and poorly regulated.

This type of radiators was widespread in the USSR. They were installed almost everywhere. In the low houses of the time, the heating systems had a working pressure of 4 to 8 atmospheres, so the cast-iron products coped very well with a working pressure of 9 to 12 atmospheres. In modern apartment buildings working pressure can reach 12 atmospheres or even higher. For all its hardness and density, cast iron is quite brittle metal, and can not withstand this pressure.

Another serious problem is the water hammer, which with the advent of ball valves have become a frequent phenomenon in apartment buildings. A cast-iron radiator can withstand bursting pressure of up to 16 atmospheres, and water hammer can reach more than 20 atmospheres. Abruptly closed ball valve generates a pressure jump that can literally split the fragile cast iron battery. Previously, such problems did not exist, because heating systems used screw valves, which provide a smooth flow and shut-off of water.

Cast iron products in this respect does not differ from the steel panel. They can be used in low houses and preferably with screw cocks in the boiler room, or with special pressure-compensating reducers. Then good old cast iron can serve in the central heating system for up to 50 years.

Otherwise, cast iron is quite unpretentious metal, which is not afraid of neither chemical impurities, nor fragments of particles and sludge that come together with technical water in open heating systems.

Types of radiators

Among the huge variety of models, the consumer faces the problem of which heating batteries are better to choose for the apartment, and which for a private home.

Types of batteries can be grouped according to the following characteristics.

Cast iron

Sections of the first cast-iron heating batteries can still be seen in old apartment buildings of the Soviet period of construction. The external appearance left much to be desired. They were quite cumbersome and did not decorate the interiors of apartments.

Modern devices of this type have stylish design and high heat output. Due to the structure of cast iron, the radiator can withstand critical pressure levels up to 30 atmospheres (A), which saves it from a powerful water hammer and burst housing.

Cast iron heats up quickly and slowly gives out heat.

Better cast iron radiators for the apartment

Products of cast iron are “tolerant” to water quality and can withstand many years of operation with a polluted coolant. Due to the design, the batteries can be assembled and disassembled, varying the number of sections.


In an apartment we can recommend the installation of a steel radiator. They compare favourably with their cast iron “brothers” by their light weight.

Significant drawback is the susceptibility to corrosion.

Devices are designed for the limit temperature of the heat carrier of 90 0 C. Steel batteries can be tubular and panel. Both have a high degree of heat dissipation.

They heat up almost twice as fast as their cast iron counterparts, but they cool down just as quickly. At the end of the heating season the water from steel radiators is not discharged. This is done to prevent the inner surface of the product channels from rusting from contact with the air.

Panel models are not collapsible design, while in the tubular products you can replace sections or add new ones.


Aluminum radiators for apartments are often a budget option. The battery, made by extrusion, can not be repaired. Using the technology of extruding molten metal into a mold, one-piece device with flow-through channels is obtained.

choose, radiators, apartment

Unquestionable advantage of such radiators is their fast heating-up time, light weight and easy installation. The metal of the products is anodized, resulting in a protective oxide film on the aluminum surface.

The disadvantages include the high cost of products and complexity of connection to steel pipes only through special couplings on the outside. Aluminum heaters are capricious with respect to district heating fluid. Their channels can quickly become clogged with deposits of untreated hot water.


The battery is made of two metals, steel and aluminum. The basis of the radiator is horizontal inlet and outlet steel tubes with transverse tubular channels, surrounded by converter aluminum plates.

Bimetal construction combines the best thermal properties of the two metals. Steel, heated by the coolant, transfers the heat to aluminum plates. They release heat energy into the air space of the apartment much faster than a steel body.

What’s the advantage? In that aluminum does not come into contact with the liquid heat carrier, thereby not exposed to the risk of corrosion. This allows you to create an efficient heat transfer and greatly increase the service life of heating devices.


Copper is an excellent conductor of heat, which cannot be compared to any metal. Copper heat exchangers are ideal for space heating. Along with beautiful appearance radiators serve at least 25-30 years.

The surface of the metal has virtually no adhesion, thanks to which even dirty hot water does not leave any deposits in its tubes. Copper is absolutely indifferent to corrosion processes, can withstand a pressure in the pipe up to 36 atmospheres and a temperature of over 100 0 C. The only and significant disadvantage is the high cost of copper products.


Plastic radiators. today’s innovation in the market of heat engineering. In technical terms, the new products are still far behind their counterparts made of other materials.

Operating temperature of heat carrier in them should not exceed 80 0 C. Operational pressure in the heating system should be less than 3 atm.

Despite this, because of its advantages, the plastic heating device is expected to have a great future. Plastic products are several orders of magnitude cheaper than batteries made of other materials. They are easy to connect to plastic pipes. The material can be any color, which makes it possible to give the interior of the room an unusually beautiful color.

The shape of the device and how to place

According to the form of the device radiators are divided into panel and tubular products (see: “Radiators”). above chapter “Steel”).

Regarding the method of placement, the floor units are based on feet, and wall-mounted models are attached to the vertical railing.

Selection algorithm

First you need to determine your heating system. It can be centralized heating or individual, which is carried out with the help of a boiler.

choose, radiators, apartment

The next step is for you to understand how your heat exchanger functions.

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The third step is to understand the quality of the liquid that fills the radiators. If it is good enough, then you can give preference to inexpensive models. If the liquid is filled with various impurities, in this case it is better to give preference to expensive models.

Also the appearance plays an important role. If you want exactly a stylish device that will stand out from other units, then in this situation you should pay attention to the copper or bimetallic radiator. However, if you’re not looking for quality, you can also try aluminum. Cast iron batteries are efficient, but less attractive units.

However, you can choose for yourself the model that will fit perfectly into the interior.

But always remember that some unscrupulous dealers may present one material as another. Therefore, before you give your money, carefully study the technical data sheet of the device. It is important that it corresponds to the model you have chosen, as well as detailing the materials from which it was made.

What radiators for the apartment is better? This question is asked by everyone who is planning to do repairs in the near future. The answer to this question can be very diverse. Someone believes that you should give preference to cast iron. Others, on the other hand, copper or bimetal. Others do not mind aluminum, knowing that they will use the room to live for a short time. Everything is made up of individual moments and details that surround a person’s life.

However, if you have not decided what radiators will buy in your apartment, be sure to review the list of the best radiators for the apartment. There is a high probability that you will discover a lot of new information, which means that the probability increases that you will make the right choice.

Beware of scammers who pass off one material as the other. This often happens in small stores that operate without a license from the manufacturers. Ideally, if you come to the manufacturer’s store and talk to the manager, and purchase a licensed, certified product

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