Calculate an aluminum radiator per room. Calculation of the number of heating radiators per area

Dear users of our resource! On our site you have the opportunity to choose a radiator yourself. This means that you can calculate the number of radiators you need to install in each room. In order to make this calculation, to have certain calculation information at hand, only then can radiators be selected with greater accuracy. Information needed to determine the number of radiator sections: The main one is the heat output of the radiator (heat transfer) - this is a value that shows how much heat energy the radiator gives off in a certain unit of time. Thermal power is expressed in watts. For each radiator, this value is determined by the manufacturer. Let's move on to the calculation part. From the foregoing, we come to the conclusion that it is necessary to determine the thermal power required to heat a particular room, for this we just need the dimensions of the room. Next step. Be patient, find a pencil, paper, tape measure and prepare the following information for the correct selection of radiators: type of windows, quality of thermal insulation, window and floor area, average temperature of the coldest week of the year, type of room above the calculated one, room size. So, if you have collected all the necessary information, let's get started.

Selection of a heating radiator (calculation of the number of sections)

Now you need to decide which radiators you want to install: aluminum radiators (extruded and die-cast); steel radiators (tubular, panel); bimetallic radiators (extrusion and injection molded); cast iron radiators (tubular). So, if you have already opted for radiators of a certain type, then the next question that arises is how to choose a radiator from the already existing variety that meets specific requirements. You can find out how to choose a heating radiator in the section "Articles" - "Articles about heating radiators"

Despite the wide range of modern heat-exchange heating devices, the familiar cast-iron “accordion” radiators are not going to go into oblivion at all. Moreover, manufacturers of such batteries do not experience any problems with sales. This is due to the excellent reliability of products that can serve for half a century or more, and high heat transfer rates.

How to correctly determine the number of sections of such radiators in order to ensure comfortable living conditions in the room? It all depends on the characteristics of the room where they are planned to be installed, and on the parameters of the batteries themselves - they can vary significantly. Our calculator for calculating the number of sections of the MC cast-iron radiator will help you come to the right decision.

Prices for cast iron radiators

cast iron radiator

The calculation requires some explanation - they will be given below the calculator.

The calculation is carried out for each room separately.
Sequentially enter the requested values ​​or mark the required options in the proposed lists.
Click the button "Calculate number of sections"

Room area, m²

100 watts per sq. m

Number of external walls

no one two three

External walls look at:

North, Northeast, East South, Southwest, West

The position of the outer wall relative to the winter "wind rose"

Windward side Leeward side parallel to the direction of the wind

The level of negative air temperatures in the region in the coldest week of the year

35 °С and below from - 30 °С to - 34 °С from - 25 °С to - 29 °С from - 20 °С to - 24 °С from - 15 °С to - 19 °С from - 10 °С up to - 14 °С not colder than - 10 °С

What is the degree of insulation of the outer walls?

External walls are not insulated Average degree of insulation External walls are well insulated

Ceiling height in the room

Up to 2.7 m 2.8 ÷ 3.0 m 3.1 ÷ 3.5 m 3.6 ÷ 4.0 m over 4.1 m

What's on the bottom?

Cold floor on the ground or above an unheated room Insulated floor on the ground or above an unheated room Heated room is located below

What is on top?

Cold attic or unheated and uninsulated room Insulated attic or other room Heated room

Type of installed windows

Ordinary wooden frames with double glazing Windows with single (2 panes) double glazing Windows with double (3 panes) double glazing or argon filling

Number of windows in the room

Window height, m

Window width, m

Doors facing the street or a cold balcony:

Estimated tie-in scheme for heating radiators

Estimated features of the location of radiators

The radiator is installed openly on the wall The radiator is covered from above by a window sill or a shelf The radiator is covered from above by a wall niche The radiator is covered from the front by a decorative screen The radiator is completely covered by a decorative casing

Radiator model MC

Calculation Explanations

The calculation algorithm is based on the fact that heating 10 m² requires 1 kW of thermal energy. It is clear that this ratio is very arbitrary, so it will be adjusted by a number of coefficients that take into account the specifics of the room.

• The area of ​​\u200b\u200bthe room is not difficult to calculate, especially if the room has a traditional rectangular configuration.

Assistance in calculating the area of ​​premises of complex shape

If the room has a more complex shape, then several different approaches can be applied. More about this, with a consideration of possible examples and with calculation calculators, in the article about.

• The number of external walls. The more of them, the more significant the heat loss, and this is taken into account by the calculation program.
• Of considerable importance is the location of the outer walls of the room relative to the cardinal points. The reason probably does not need to be explained.
• If the wall is located on the windward side of the traditional winter winds, then it will cool faster - therefore, a supply of thermal power is needed to compensate for this phenomenon.
• "Frost level" characterizes the climatic features of the region. This column does not indicate abnormal temperatures, but quite normal for the coldest decade of winter.
• If the wall is fully insulated, based on the heat engineering calculations, then the level of thermal insulation can be considered high-quality. In general, non-insulated walls, in principle, should not even be considered, since heating will be a transfer of money for energy resources, and still a comfortable microclimate cannot be achieved in the house.
• The higher the ceilings, the greater the volume of the room, and the more thermal energy is required to warm it up.
• The next two columns take into account the vertical proximity of the room - above and below, that is, in fact, heat loss through the ceiling and floor.
• Next - a few fields regarding the presence and features of windows. Naturally, the total need for thermal energy in the room to compensate for possible heat losses directly depends on these parameters.
• If the room has a constantly used door facing the street, a cold entrance or an unheated balcony, then any opening of it is accompanied by an influx of cold air. This must be compensated by a certain power addition.
• Features of a particular heating system can affect the scheme of inserting radiators into the circuit. And this, in turn, is reflected in the heat exchange characteristics of the batteries. It is necessary to choose the proposed tie-in scheme from the presented examples.
• A radiator placed openly on the wall, hidden in a niche or covered with a casing - all of them will seriously differ in their heat transfer. This is taken into account in a special input field - you must select the features of the installation from the list.
• Finally, the models of MC cast-iron radiators themselves differ in linear parameters and, accordingly, in their specific thermal power in terms of one section. The proposed list presents the most common types of MC cast iron batteries, and their characteristics are already included in the calculation program.
• The result will show the recommended number of sections for installation in a particular room.

More about cast iron radiators type MS

Heating a dwelling in our climate is the most urgent task for owners of country houses.

On the one hand, it is necessary to ensure a comfortable thermal regime, on the other hand, an optimal energy consumption.

In order to correctly solve this problem, and determine how many sections of heating radiators (bimetallic, steel, cast iron, etc.) are needed, it is necessary to make a reliable calculation based on the area of ​​\u200b\u200bthe room using the online calculator located below.

Indicate in the calculator the scheme for connecting radiators

Mandatory reading explanation of online calculator calculations

Types of heating devices - main characteristics

Before purchasing the elements of the heating system, it is necessary not only to calculate them, but to calculate the entire system so that its individual components are mutually consistent in all respects. These elements include:

• heating network boilers;
• radiators;
• pipelines;
• a circular pump, if one is provided for by the project;
• expansion tank - currently, as a rule, membrane units are used.

What you need to know when choosing radiators

When purchasing batteries for a heating system, you need to consider the following parameters:

1. Calculate the number of sections of heating radiators, based on the number of heated rooms in the house.
2. Maximum allowable working pressure.
3. Power.
4. Design features that may affect the installation of the heating network and the necessary components for this.

Currently, the construction market offers the following main types of heat exchangers for heating systems.

Cast iron

The positive aspects of these products include a presentable appearance and ease of care for them.

Bimetallic

Such heat transfer devices combine the best properties of steel and aluminum products. Their inner part at the points of contact with the coolant is made of stainless steel. This predetermines the long life of the device, since the base material is resistant to aggressive agents and does not tend to adsorb rust elements. The outer part shows its best qualities, corresponding to the material of manufacture. It has a presentable appearance, easy to maintain and clean.

Since the stainless steel interior is made of thin-walled metal, its low thermal conductivity does not adversely affect the operation of the device.

Copper heat exchangers

The use of this material for the manufacture of heat transfer devices in heating circuits has long been known. But such products have received a real renaissance only recently. The fact is that only pure refined copper is used for heating systems, and now its production is provided by relatively inexpensive technological methods.

Suffice it to say that with the same characteristics, a copper radiator weighs several times less, and the heat transfer from it is many times higher.

This contributes to a significant reduction in energy costs for heating residential and industrial buildings.

Copper has sufficiently high mechanical strength, which allows the use of pipes from it at temperatures up to 150 degrees at a pressure of 16 atmospheres.

In addition, copper heating systems have a presentable appearance.

Method for calculating heating radiators by area

Comfortable living in any living space is ensured by an optimally tuned heating system. Its formation is impossible without knowledge of modern methods of formation of heating systems, which includes the possession of methods for calculating heating radiators.

It should be noted that heat engineering calculations in construction are the most complex. It is safe to say that a detailed and reliable calculation can only be performed by highly qualified specialists or specialized organizations.

The basis for calculating radiators is based on accounting for heat losses in the room, which must be replenished in the process of life by the heat transfer of the heating system. Nevertheless, allowing redistributed simplifications, one can obtain a result close to reliable independently.

Heating power selection

When choosing a heating scheme for a small private house, this indicator is decisive.

To calculate the sections of bimetallic heating radiators by area, you need to determine the following parameters:

• the amount of necessary compensation for heat losses;
• the total area of ​​the heated room.

In construction practice, it is customary to use the first indicator in the above form as 1 kW of power per 10 square meters, i.e. 100 W/m2. Thus, the ratio for the calculation will be the following expression:

N = S x 100 x 1.45,

where S is the total area of ​​the heated premises, 1.45 is the coefficient of possible heat losses.

If we look at a specific example of calculating the heating power for a room of 4x5 meters, it will look like this:

1. 5 x 4 \u003d 20 (m 2);
2. 20 x 100 = 2000 (W);
3. 2000 x 1.4 = 2900 (W).

A typical place for installing a radiator is the space under the window, so we use two radiators of the same power of 1450 watts. This indicator can be influenced by adding or reducing the number of sections installed in the battery. It should be borne in mind that the power of one of them is:

• for bimetallic 50 centimeters high - 180 watts;
• for cast iron radiators - 130 watts.

Therefore, you will need to install: bimetallic - 1450: 180 = 8 x2 = 16 sections; cast iron: 1450: 130 = 11.

By using glass packages, heat loss on windows can be reduced by about 25%.

Calculation of sections of bimetallic heating radiators by area gives a clear primary idea of ​​their required number.

Accounting for the features of the room

Technical characteristics of different types of radiators are not the same. Heating engineers recommend using cast iron radiators in private homes; bimetallic or aluminum products are more suitable for an apartment.

The calculation of the section size takes into account not only the quadrature, but also the probable heat losses occurring through windows, doors, walls, ceilings and floors, as well as through ventilation ducts. For each type of unproductive heat consumption, its own coefficients are used, denoted by the letter Q.

The following parameters must be included in the calculation of heat losses:

1. Temperature difference between outside and inside, referred to as DT.
2. The area of ​​doors and windows and other similar structures - S.
3. The thickness of partitions or walls - V.
4. The value of the thermal conductivity of the walls, depending on the nature of the material and the insulation materials used - Y.

The calculation ratio looks like this:

Q = S x DT / R layer,

where R=V:Y.

All calculated coefficients must be summed up, and in the presence of ventilation shafts, the resulting figure increases by up to 40%.

The result is divided by the area of ​​\u200b\u200bthe house and added to the indicator of the estimated power of the heating batteries.

Depending on the location of the rooms in space, additional coefficients are introduced for verticals facing north, northeast and northwest. It is 10%, and for those facing the southeast and southwest - 5%. For the southern direction, the amendment does not apply. For a corner room with two walls facing the outside, the additional coefficient is taken equal to 5%.

If the wall height is more than 4 meters, an additional factor of 2% is introduced. A reduction in heat loss parameters can be obtained by insulating the ceiling from the attic side and the roofing pie.

Influence of other devices of the heating system

The calculation of heating radiators is the first link in the chain of such actions in relation to the entire heating system as a whole. In particular, its result directly affects the selection of the power of the heating boiler.

In addition, the balance of heating in the room is affected by the heat dissipation of piping.

Considering the many factors that affect the operation of the heating system, special calculators have been developed that allow you to quickly and with sufficient accuracy calculate the number of heating radiators based on the area of ​​\u200b\u200bthe heated room. Many such programs have been developed, and they all work according to different algorithms. But their results can be trusted.

Calculation of heating radiators per square meter with a calculator developed for our website will significantly reduce the time for performing auxiliary operations with sufficient accuracy of the result in terms of thermal power.

The efficiency of a heating system depends on many factors. But, as is clear from the above information, heating costs can be optimized by paying attention to the following factors:

1. It has been established that the main losses of thermal energy occur in the upper part of the house and range from 25-30% with an uninsulated roof.
2. Losses are also significant with insufficiently insulated floors.
3. The material from which the walls are made matters. Being installed from concrete blocks or cast walls, the enclosing structures quickly lose heat to the external space, which requires additional costs for their heating and maintenance in this state for a long time.
4. Floor insulation is of particular importance. Being constantly cold, it creates uncomfortable living conditions and creates a lot of inconvenience. In addition, underfloor heating significantly reduces the temperature of the main heating circuit, which saves fuel resources. But it should be remembered that the surface temperature of the warm floor should not exceed 30 degrees. Otherwise, ascending convection currents arise, raising dust from the floor, which is harmful to humans.

Thus, after reading this article, you will be able to independently calculate the required number of sections for radiators using formulas and check the correctness of the information received using a calculator.

Exists . To heat 1 m2 of a room to a comfortable temperature (+20 °C), the heater must emit 100 W of heat. This number must be used.

You need to do the following:

1. Determine the thermal power of one battery fin. Often it is equal to 180 watts.
2. Calculate or measure the temperature of the coolant in the heating system. If the temperature of the water entering the heater is tin. \u003d 100 ° С and leaving it is tout. \u003d 80 ° C, then the number 100 is divided by 180. The result is 0.55. It is 0.55 sections that should be used for 1 sq. m.
3. If the measured indicators are lower, then the ΔT indicator is calculated (in the above case it is 70 ° C). To do this, use the formula ΔT = (tin. + tout.) / 2 - tk, where tk is the desired temperature. Standard tk is 20 °C. Let tin. = 60 °С, and tout. \u003d 40 ° С, then ΔT \u003d (60 + 40) / 2 - 20 \u003d 30 ° С.
4. Find a special plate in which a certain value of ΔT corresponds to a correction factor. For some radiators at ΔT = 30 ° C, it is 0.4. These labels should be asked from the manufacturers.
5. Multiply the thermal power of one fin by 0.4. 180 * 0.4 = 72 watts. That is how much heat can be transferred by one section from a coolant heated to 60 ° C.
6. Divide the norm by 72. Total 100/72 = 1.389 sections are needed to heat 1 m2.

This method has the following disadvantages:

1. Norm 100 W is calculated for rooms whose height is less than 3 m. If the height is greater, then a correction factor must be used.
2. Not taken into account heat loss through windows, doors and walls if the room is corner.
3. The heat loss caused by a certain way of installing the heater is not taken into account.

Read also: Power and number of sections of aluminum radiators

Correct calculation

It provides multiplying the area of ​​​​the room by the norm 100, adjusting the result depending on the characteristics of the room and dividing the final figure by the power of one rib (it is advisable to use the adjusted power).

The product of the area and the norm equal to 100 W is corrected as follows:

1. For each window, 0.2 kW is added to it.
2. For each door, 0.1 kW is added to it.
3. For a corner room, the final figure is multiplied by 1.3. If the corner room is located in a private house, then the coefficient is 1.5.
4. For a room with a height greater than 3 m, apply the coefficients 1.05 (height 3 m), 1.1 (height 3.5 m), 1.15 (4 m), 1.2 (4.5 m).

It is also necessary to take into account the way the heater is placed, which also leads to heat loss. These losses are:

• 3-4% - in case of installation of the heating device under a wide window sill or shelf;
• 7% if the radiator is installed in a niche;
• 5-7% , if located near an open wall, but partially covered by the screen;
• 20-25% - in case of complete screen closure.

Example of calculating the number of sections

It is planned to put the battery in a room of 20 square meters. m. The room is corner, has two windows and one door. The height is 2.7 m. The radiator will be placed under the windowsill (correction factor - 1.04). The boiler supplies heat carrier with a temperature of 60 °C. At the outlet of the heater, the water will have a temperature of 40 °C.

Every home owner faces important questions when installing heating. What kind of radiator to choose? How to calculate the number of radiator sections? If a house is being built for you by professional employees, they will help you make the right calculations so that the distribution of heating batteries in the building is rational. However, this procedure can be carried out independently. You will find the formulas necessary for this in the article below.

Types of radiators

To date, there are such types of batteries for heating: bimetallic, steel, aluminum and cast iron. Radiators are also divided into panel, sectional, convector, tubular, and design radiators. Their choice depends on the coolant, the technical capabilities of the heating system and the financial capacity of the owner of the house. How to calculate the number of radiator sections per room? This does not depend on the type. In this case, only one indicator is taken into account - radiator power.

Calculation methods

In order for the heating system in the room to work efficiently and in winter it was warm and comfortable in it, you need to carefully use the following calculation methods:

• Standard - carried out on the basis of the provisions of SNiP, according to which heating 1m 2 will require a power of 100 watts. The calculation is carried out using the formula: S / P, where P is the capacity of the department, S is the area of ​​the selected room.
• Approximate - for heating a 1.8 m 2 apartment with ceilings 2.5 m high, you will need one radiator section.
• Volumetric method - heating power of 41 W is taken per 1m 3. The width, height and length of the room are taken into account.

How many radiators will be needed for the whole house

How to calculate the number of radiator sections for an apartment or house? Each room is calculated separately. According to the standard, the heat output per 1 m 3 of the volume of a room with one door, a window and an external wall is considered to be 41 watts.

If the house or apartment is “cold”, with thin walls, has many windows, the house is not located on the first or last floor, then 47 W per 1 m 3, and not 41 W, are needed to heat them. For a house built from modern materials using different insulation for walls, floors, ceilings, with metal-plastic windows. you can take 30 watts.

To replace cast iron radiators, there is the simplest calculation method: you need to multiply their number by the resulting number - the power of new appliances. When purchasing aluminum or bimetallic batteries for replacement, the calculation is carried out in the ratio: one cast iron fin to one aluminum fin.

Rules for calculating the number of branches

• An increase in radiator power occurs: if the room is end and has one window - by 20%; with two windows - by 30%; windows facing north also require an increase of another 10%; battery installation under the window - 5%; closing the heater with a decorative screen - by 15%.
• The power required for heating can be calculated by multiplying the area of ​​\u200b\u200bthe room (in m 2) by 100 watts.

In the product passport, the manufacturer indicates the specific power, which makes it possible to calculate the proper number of sections. Do not forget that the heat transfer is affected by the power of a separate section, and not by the size of the radiator. Therefore, placing and installing several small appliances in a room is more effective than installing one large one. The incoming heat from different sides will warm it evenly.

Calculation of the number of compartments of bimetallic batteries

• Dimensions of the room and the number of windows in it.
• The location of a particular room.
• The presence of open openings, arches and doors.
• The heat transfer power of each section, indicated by the manufacturer in the passport.

Calculation steps

How to calculate the number of radiator sections if all the necessary data is recorded? To do this, determine the area, calculating in meters the derivatives of the width and height of the room. Using the formula S \u003d L x W, calculate the joint area if they have open openings or arches.

Next, the calculation of the total batteries is carried out (P \u003d S x 100), using a power of 100 W to heat one m 2. Then the proper number of sections is calculated (n = P / Pc) by dividing the total thermal power by the heat transfer of one section indicated in the passport.

Depending on the location of the premises, the calculation of the required number of compartments of the bimetallic device is carried out taking into account the correction factors: 1.3 - for the angular one; use a coefficient of 1.1 - for the first and last floors; 1.2 - used for two windows; 1.5 - three or more windows.

Carrying out the calculation of battery sections in the end room, located on the first floor of the house and having 2 windows. The dimensions of the room are 5 x 5 m. The heat output of one section is 190 W.

• We calculate the area of ​​​​the room: S \u003d 5 x 5 \u003d 25 m 2.
• We calculate the thermal power in general: P \u003d 25 x 100 \u003d 2500 W.
• We calculate the required sections: n = 2500 / 190 = 13.6. We round up, we get 14. We take into account the correction factors n \u003d 14 x 1.3 x 1.2 x 1.1 \u003d 24.024.
• We divide the sections into two batteries and install them under the windows.

We hope that the information presented in the article will tell you how to calculate the number of radiator sections for a house. To do this, use the formulas and carry out a relatively accurate calculation. It is important to choose the right section power that is suitable for your heating system.

If you cannot calculate the required number of batteries for your home on your own, it is best to seek help from specialists. They will perform a competent calculation, taking into account all the factors affecting the efficiency of the installed heating devices, which will provide heat in the house during the cold period.