For your comfort and wellbeing, you must make sure your house stays warm and comfortable throughout the colder months. Efficient heating of your living areas is a vital component of keeping your home comfortable. We’ll discuss the significance of correctly sizing heating radiators according to the volume of the room they serve in this post.

Heating radiators are essential for evenly dispersing heat and fostering a cozy atmosphere for room occupants. But the secret to getting the best heating efficiency is choosing the correct size radiator. If you install radiators that are too small, the room may feel uncomfortable and cold due to insufficient heat output. On the other hand, large radiators may waste energy and increase utility costs.

A number of factors must be taken into account when determining the proper size for heating radiators, and one of the most important ones is the room’s volume. A room’s volume can be calculated by multiplying its length, width, and height together. This measurement gives an approximate idea of how much air in the room needs to be heated.

To ensure efficient heating, the radiator’s heat output must be matched to the room’s volume. Insufficient output from a radiator will make it difficult to sufficiently heat the entire space, leading to uncomfortable cold spots. On the other hand, an overly powerful radiator could cause overheating and wasteful energy use.

Homeowners can ensure effective heating while minimizing energy waste and lowering heating costs by precisely calculating the required heat output based on the volume of the room. A homeowner can design cozy, energy-efficient, and comfortable living spaces by knowing the proper size for heating radiators.

- Calculation of heating radiators by area
- How to calculate the sections of the radiator by the volume of the room
- Correction of results
- Walls and roofs
- Climate factors
- Calculation of different types of radiators
- Adjustment depending on the heating system mode
- The dependence of the radiator power on the connection and location
- Determining the number of radiators for single -pipe systems
- Calculation of the number of sections of heating radiators: analysis of 3 different approaches + examples
- Calculation by the area of the room
- Calculations depending on the volume of the room
- What to do if you need a very accurate calculation?
- How to calculate the number of radiator sections
- Calculation by area
- An example of calculating the number of sections of radiators by the area of the room
- We count the batteries in volume
- Example of calculation by volume
- Heat transfer of one section
- Video on the topic
- Calculation of heating radiators Part 2
- Calculation of the power of two radiators in one room
- how many radiators are needed for the room, calculation of the radiator for a residential building
- Selection of heating radiators by power and area. The main mistake in the calculations. Correct formula.

## Calculation of heating radiators by area

The simplest method. Determine how much heat is needed for heating by calculating the area of the room where the radiators will be placed. You are aware of each room’s dimensions, and the SNiP construction standards can help you assess whether heat is necessary:

- For the average climatic strip for heating 1m 2 dwelling, 60-100W is required;
- For areas above 60 O required 150-200W.

You can determine how much heat your room will need based on these norms. For heating area 16 m 2, if the residence is in the middle climate lane. 1600W of heat will be required (16*100 = 1600). We think 100W is necessary because the norms are average and the weather is not particularly consistent. However, you have soft winters if you live south of the average climatic strip (count 60W each).

The SNiP norms can be used to calculate the heating radiators.

Heating requires a power supply, but not a very big one—as the amount of power needed grows, so does the number of radiators. Also, the system contains more coolant the more radiators there are. If this is not a problem for people who have central heating, then for people who have or plan to have individual heating, the system’s large volume means high coolant heating costs and high system inertia (the maintained temperature is not as precisely maintained). And so it makes sense to ask, "Why pay more?"

We can determine the number of sections that will be needed after calculating the requirement for the premises in the warmth. The passport specifies the maximum temperature at which each heating device can detect heat. Divide the requirement for warmth by the radiator power. The number of sections needed to make up for losses is the outcome.

We figure out how many radiators are needed in that same space. We came to the conclusion that 1600W must be allotted. Allow one section to have 170W of power. 1600 divided by 170 equals 9.411 pieces. At your discretion, you can round in the greater or lesser direction. For smaller spaces, you can be rounded out in the kitchen, where there are plenty of extra heat sources. For larger spaces, a room with a balcony, a big window, or a corner room are preferable.

Although the system is straightforward, it has several obvious drawbacks, such as the inability to account for various ceiling heights, different materials for the walls, windows, and insulation, among other things. As a result, the number of heating radiator sections on SNiP has been estimated roughly. You have to adjust for the precise outcome.

## How to calculate the sections of the radiator by the volume of the room

Because you must heat every inch of the space, this computation takes into consideration both the area and the height of the ceilings. Therefore, this strategy makes sense. And the method is the same in this instance. After calculating the room’s volume, we calculate how much heat the space requires to be heated based on standard procedures:

- In a panel house, 41W is required to heat a cubic meter of air;
- In a brick house on M 3 – 34W.

- In a panel house. The heat required for heating is 43.2m 3 *41V = 1771.2W. If you take the same sections with a capacity of 170W, we get: 1771W/170W = 10.418pcs (11 pcs).
- In a brick house. Heat is needed 43.2m 3 *34W = 1468.8W. We count radiators: 1468.8W/170W = 8.64pcs (9pcs).

The discrepancy is noticeable: 11 pieces versus 9 pieces. Additionally, they obtained an average value of 10 points when calculating the area, if the rounds were done in the same direction.

## Correction of results

You must consider as many variables that affect heat loss as you can in order to obtain a more accurate calculation. This includes the type of material the walls are made of, how insulated they are, the size and type of glazing on the windows, how many walls in the space face the outside, and so on. To calculate these coefficients, the room’s calculated heat loss must be multiplied.

The size of the heat loss determines how many radiators are needed.

15% to 35% of heat loss occurs through the windows. The size and level of insulation of the window determine the exact number. Consequently, there are two matching coefficients:

- The ratio of the window area to the floor area:

- 10% – 0.8
- 20% – 0.9
- 30% – 1.0
- 40% – 1.1
- 50% – 1.2

- Three -chamber double -glazed window or argon in a two -chamber double -glazed window – 0.85
- Normal two -chamber double -glazed window – 1.0
- Ordinary double frames – 1.27.

### Walls and roofs

The kind of wall, the level of thermal insulation, and the quantity of walls extending into the street are crucial factors to take into consideration when calculating losses. The coefficients for these factors are shown here.

- Brick walls of two brick thickness are considered the norm – 1.0
- insufficient (absent) – 1.27
- Good – 0.8

The existence of exterior walls:

- Inner room – without loss, coefficient 1.0
- One – 1.1
- Two – 1.2
- Three – 1.3

Whether or not a room is heated affects how much heat escapes. If the heated attic is 0.9 and the inhabited heated room (such as the second floor of the house, another apartment, etc.), the reducing coefficient is 0.7. It is widely acknowledged that temperature B and (coefficient 1.0) are unaffected by an unheated attic.

In order to accurately determine the number of radiator sections, consideration must be given to the climate and features of the premises.

If the computation was done along the area and the ceiling heights are non-standard (a height of 2.7 m is used as the standard), the coefficient is used to determine a proportionate increase or decrease. It’s regarded as simple. Divide the actual ceiling height in the space by the standard 2.7 meters to arrive at this measurement. Obtain the intended coefficient.

As an example, we compute 3.0 meters for the ceiling height. The result is 3.0m/2.7m = 1.1. Thus, the number of radiator sections—which was determined using this room’s area—needs to be multiplied by 1.1.

These coefficients and norms were all established for apartments. You must raise the result by 50%, or the coefficient for a private house, in order to account for the heat loss of the house through the roof and the basement/foundation.

### Climate factors

Depending on the typical wintertime temperature, you can:

Get a more precise estimate of the number of radiators needed for heating by making all the necessary adjustments and accounting for the specifics of the space. However, there are other factors as well that influence thermal radiation power. We will discuss technical details in more detail below.

Selecting the proper size radiator for every room in your house is essential for efficient heating. Radiator size should be determined by taking into account the room’s volume to provide the best possible warmth and comfort with the possibility of energy savings. This calculation provides a customized solution for effective heating by accounting for variables such as room dimensions, insulation levels, and desired temperature. While undersized radiators might find it difficult to maintain a comfortable temperature, oversized radiators can waste energy. Hence, being aware of the volume-based computation aids homeowners in making defensible choices and guarantees that their heating system functions effectively and efficiently during the winter.

## Calculation of different types of radiators

There should be no problem calculating the number of sectional radiators if you plan to install standard-sized radiators (with an axial distance of 50 cm height) and have already selected the material, model, and desired size. The majority of reliable companies that offer high-quality heating equipment have technical documentation for every change, including thermal capacity. Transferring to power is straightforward if coolant flow rate is indicated rather than power: one kilowatt-hour (1000 watt-minute) of heat carrier consumption is roughly equivalent to one kW of power.

The height between the centers of the holes for the coolant supply and display determines the radiator’s axial distance.

On numerous websites, a specially created calculator program is installed to make life easier for users. The computation of the heating radiator sections then comes down to filling in the relevant fields on your property with data. Also, you will find a ready-made result at the exit: the total number of sections in pieces that make up this model.

The coolant hole centers are used to calculate the axial distance.

However, if you are merely speculating about potential solutions for the time being, it is important to keep in mind that radiators of the same size made of various materials have varying thermal powers. There is no variation in the process used to determine how many sections of bimetallic radiators to use when calculating aluminum, steel, or cast iron. One section’s thermal power is the only variable that can vary.

You can navigate by averaged data, which made counting easier. The following power values for a single radiator section with an axial distance of 50 cm are accepted:

- Aluminum – 190W
- Bimetallic – 185W
- Cast iron – 145W.

You can use these data if you are simply unsure about which material to select. For the sake of clarity, we provide the simplest calculation for bimetallic heating radiator sections, wherein the room’s area is the only consideration.

It is acknowledged that one section can heat 1.8 m 2 areas when calculating the number of heating devices from a standard bimetal (the center distance of 50 cm). The required room size is then 16 m^2 / 1.8 m^2 = 8.88 pieces. We need nine sections after rounding.

We also account for steel or cast-iron ramers. Norms are all that are required.

- Bimetallic radiator – 1.8m 2
- aluminum-1.9-2.0m 2
- cast iron-1.4-1.5m 2 .

This is data for sections with an interdose distance of 50cm. Today there are models on sale from a very different height: from 60cm to 20cm and even lower. Models of 20cm and below are called curb. Naturally, their power is different from the specified standard, and if you plan to use Non -Tandart, you will have to make adjustments. Either look for passport data, or count yourself. We proceed from the fact that the heat transfer of the heat device directly depends on its area. With a decrease in height, the area of the device decreases, which means that the power is reduced in proportion. That is, you need to find the ratio of the heights of the selected radiator with the standard, and then with this coefficient to adjust the result.

Cast-iron heating radiator calculation. can be taken into account by the room’s size or volume

We’ll compute aluminum radiators by area for clarity’s sake. The 16 m 2 room remains the same. The number of standard-sized sections is calculated as follows: 16 m 2 /2 m 2 = 8 pcs. However, we wish to use 40 cm high tiny sections. The ratio of the chosen size radiators to the standard is 50 cm/40 cm = 1.25. We now modify the quantity to 10 pieces (8 pieces * 1.25).

## Adjustment depending on the heating system mode

The maximum power of the radiators is indicated by the manufacturers in the passport data: for high-temperature use, the coolant should be 90 °C in the supply and 70 °C in the return (90/70) in the room, with a recommended quantity of 20. However, contemporary heating systems hardly ever operate in this mode. Typically, 75/65/20 or even low temperature with parameters of 55/45/20 is used for the average capacity mode. It is evident that the adjustment calls for the computation.

You must ascertain the system’s temperature and pressure in order to adjust the operating mode. The difference in temperature between the air and the heating elements is known as temperature pressure. In this instance, the average arithmetic of the feed and return values is used to determine the temperature of the heating devices.

In order to accurately determine the number of radiator sections, consideration must be given to the climate and features of the premises.

To make the calculation of cast-iron heating radiators for the two modes—high temperature and low temperature—sectional sections (50 cm) should be made more understandable. The space remains the same: 16 meters. 1.5 m 2 is heated by one cast-iron section in the high-temperature mode 90/70/20. We thus require 16 m 2 / 1.5 m 2 = 10.6 pieces. Witch: eleven pieces. The system is designed to operate in the 55/45/20 low temperature regime. Now, determine each system’s temperature and pressure:

- High-temperature 90/70/20- (90+70)/2-20 = 60 O C;
- low-temperature 55/45/20-(55+45)/2-20 = 30 o C.

In other words, you will require twice as many sections to ensure the premises of heat if the low-temperature mode of operation is used. In our example, 22 sections of cast-iron radiators are needed for the 16 m 2 room. Big extracts a battery. It is not advised to use these kinds of heating devices in networks with low temperatures for this reason, incidentally.

You can account for the desired air temperature with this calculation. Simply determine the desired coefficient and compute the thermal pressure in this scenario if you want the room to be, say, 25 °C instead of 20 °C. For the same cast-iron radiators, let’s create everything: the parameters will come out to be 90/70/25. In this case, we take into account the temperature pressure of (90+70)/2-25 = 55 o C. The ratio of 60 O C to 55 O C is now found to be 1.1. A temperature of 25 °C requires 11 * 1.1 = 12.1 pieces.

## The dependence of the radiator power on the connection and location

Apart from the previously mentioned radiator heat transfer parameters, there are additional variations based on the type of connection. When there is no heat loss and the supply is coming from above, the diagonal connection is thought to be ideal. A side connection is associated with the highest losses, at 22%. The others are only mediocrely effective. The figure provides an approximate percentage indication of the loss.

Radiator heat loss varies based on connection

When obstacles are present, the radiator’s actual power is decreased. For instance, heat transfer is reduced by 7-8% if the windowsill is hanging on top and by 3-5% if it does not fully cover the radiator. Losses from installing a mesh screen that is not in contact with the floor are similar to those from overconducting windows, ranging from 7 to 8%. However, there is a 20–25% reduction in heat transfer if the screen closes all the way.

The installation determines how much heat is produced.

The installation site determines how much heat is produced.

## Determining the number of radiators for single -pipe systems

There is another very important point: all of the above is true for a two -pipe heating system. When a coolant with the same temperature comes to the input of each radiator. A single -pipe system is considered much more complicated: there, for each subsequent heating device, the water enters the whole more cold. And if you want to calculate the number of radiators for a single -pipe system, you need to recalculate the temperature each time, and this is difficult and long. Which exit? One of the possibilities is to determine the power of radiators as for a two -pipe system, and then proportionally to add thermal power to add sections to increase the heat transfer of the battery in general.

The more cold water enters each radiator in a single-pipe system.

Let us explain the example. The diagram shows a single -pipe heating system with six radiators. The number of batteries was determined for two -pipe wiring. Now you need to make adjustment. For the first heating device, everything remains still. The second one is already the coolant with lower temperature. We determine the % drop in power and increase the number of sections to the corresponding value. In the picture it turns out like this: 15KV-3KV = 12 kW. We find the percentage ratio: the drop in temperature is 20%. Accordingly, for compensation, we increase the number of radiators: if it was needed 8pcs, it will be 20% more – 9 or 10pcs. This is where you know the knowledge of the room: if it is a bedroom or a nursery, round you in a greater direction, if the living room or other similar room, round you on a smaller. Take into account the location relative to the cardinal points: in the north, round to a large, in the southern – into the smaller.

You must add sections to single-pipe systems that are situated on the radiator branch on a branch.

This method is clearly not perfect: after all, it turns out that the latter in the battery branch will have to have just huge sizes: judging by the scheme, the coolant with the specific heat of its power is supplied to its input, and it is unrealistic to remove all 100% in practice. Therefore, usually when determining the power of the boiler for single -pipe systems, a certain supply is taken, shut -off valves are placed and radiators are connected through the bypass so that the heat transfer can be adjusted, and thus compensate for the drop in the temperature of the coolant. One of this follows one thing: the number or/and the size of the radiators in the one -pipe system must be increased, and as they move away from the start of the branch, put more and more sections.

The number of heating radiator sections can be quickly and easily calculated. However, clarification necessitates time and attention depending on the location, size, kind of connection, and all other aspects of the premises. However, you can choose how many heating appliances to use in order to create a cozy winter atmosphere.

## Calculation of the number of sections of heating radiators: analysis of 3 different approaches + examples

For every homeowner, accurately calculating heating radiators is a crucial task. The room won’t warm up during winter colds if not enough sections are used, and the cost of buying and maintaining too-large radiators will be excessively high. As a result, you must understand how to calculate heating radiators when installing a new heating system or replacing an old one. You can use the simplest calculations for standard rooms, but in order to get the most accurate result, it is occasionally necessary to account for various nuances.

## Calculation by the area of the room

The area of the room for which radiators are being purchased can be the focus of the initial computation. This is a very basic calculation that works well in rooms with 2.40–2.60 m ceilings. As per the construction standards, a room requiring heating will require 100 watts of thermal power per square meter.

We figure out how much heat the entire space will require. This is accomplished by multiplying the area by 100 watts, or 20 square meters, in this case. Two kW, or two thousand watts, will be the computed thermal capacity (20 kV.m x 100 W).

To ensure that there is enough heat in the house, heating radiator calculations must be done correctly.

This outcome needs to be split into the manufacturer-specified heat transfer of a single section. For instance, in our scenario, the necessary number of radiator sections will be: if it is 170 watts.

Given that the result needs to be rounded to the nearest whole number, 2000 W / 170 W = 11.76, or 12. Generally, rounding is done in the direction of increase; however, you can round the lesserway in rooms where heat loss is lower than average, like the kitchen.

Make sure you account for potential heat loss based on the particular circumstances. Naturally, heat loses more quickly in a room with a balcony or in a building that is positioned in a corner. In this instance, a 20% increase in the room’s computed thermal power value is necessary. If it is intended to mount the radiators in a niche or conceal them behind the screen, then the calculations should be increased by about 15% to 20%.

Additionally, we created this calculator to make counting easier for you:

## Calculations depending on the volume of the room

If you compute the heating radiator sections by the room volume, for example, and account for the height of the ceiling, you will get more precise results. This case follows the same general principle as the preceding one. The total amount of heat required is determined first, followed by the number of radiator sections.

The room’s thermal energy requirement must be increased by 15% to 20% if the radiator is obscured by the screen.

41 watts of thermal power are required, per SNiP recommendations, to heat one cubic meter of living space in a panel house. We multiply the total volume by this normative value after multiplying the area of the room by the ceiling height. The amount of heat required in apartments with contemporary double-glazed windows and external insulation is reduced to 34 watts per cubic meter.

For instance, we figure out how much heat is needed in a 20 square meter room with a three meter ceiling. The room will have a volume of 60 cubic meters (20 kV x 3 m). In this instance, the computed thermal power will be 2460 watts (60 cubic meters x 41 W).

How do you figure out how many heating radiators there are? Divide the data that was received into the heat transfer that one section’s manufacturer specified in order to accomplish this. Assuming 170 watts, as in the previous example, the required amount of power for the room is 2460 W / 170 W = 14.47, or 15 radiator sections.

Producers make an effort to overstate the heat transfer indicators of their goods, implying that the coolant temperature in the system will reach its highest point. Since this requirement is rarely met in practice, you should concentrate on the product passport’s minimum indicators of one section’s heat transfer. As a result, the computations will be more precise and realistic.

## What to do if you need a very accurate calculation?

Regretfully, not all apartments can be regarded as typical. Private residential structures are more affected by this. So, how do you figure out how many heating radiators you need while accounting for each one’s unique operating conditions? Numerous variables will need to be considered in this.

The height of the ceiling, the quantity and size of windows, the existence of wall insulation, etc., must all be considered when determining the number of heating sections.P.

This method’s peculiarity lies in the fact that several coefficients are used to account for a room’s unique features that may have an impact on the amount of heat energy it can retain or produce. This is how the calculation formula appears:

* P * K1 * K2 * K3 * K4 * K5 * K6 * K7 = 100W/kV.m.

CT: the quantity of heat needed in a specific room; P is the room’s square footage; K1 is the coefficient that accounts for window opening glazing:

- for windows with ordinary double glazing – 1.27;
- for windows with double glass packet – 1.0;
- For windows with triple glass packet – 0.85.

K2 is the walls’ coefficient of thermal insulation:

- low degree of thermal insulation – 1.27;
- good thermal insulation (masonry in two bricks or a layer of insulation) – 1.0;
- High degree of thermal insulation – 0.85.

K3 is the proportion of the room’s floor to window area:

K4 is a coefficient that lets you account for the typical air temperature during the year’s coldest week:

- for -35 degrees -1.5;
- for -25 degrees -1.3;
- for -20 degrees -1.1;
- for -15 degrees -0.9;
- for -10 degrees -0.7.

K5 – modifies the requirement for heat by considering the quantity of exterior walls:

K6 – the type of room accounting, situated above:

- cold attic – 1.0;
- heated attic – 0.9;
- Heated housing – 0.8

K7 is the coefficient that accounts for ceiling height:

Nearly all the subtleties are included in this calculation of the number of heating radiators, which is predicated on a fairly precise assessment of the thermal energy required by the space.

It is still necessary to round the result to the whole number and divide it by the heat transfer value of one radiator section.

Some manufacturers provide a quicker method for receiving a response. You can find a handy calculator made specifically for these calculations on their websites. To use the program, fill in the relevant fields with the required values. A precise result will then be displayed. You can also use specialized software.

They didn’t consider our radiators or whether they were getting close to our house when they got the apartment. However, a replacement was eventually needed, and this is where they started to emerge from a scientific perspective. Given that it was evident the old radiators’ capacities were insufficient. Twelve is sufficient, they decided after doing all the calculations. However, you still need to consider the current situation. If Tets performs poorly and the batteries are just a little bit warm, nothing will save you.

The final formula for a more precise computation is preferred, however it’s unclear what the coefficient K2 means. How can the level of wall thermal insulation be ascertained? As an illustration, a 375mm Penoblock "Grace" wall Is this degree low or average? And will it still be average or high if you add 100 mm of dense construction foam outside the wall?

Okay, the last formula makes sense and accounts for the windows, but what if the room has an external door? And if this is a garage with three 800 by 600 windows, a 205 by 85 door, and 3000 by 2400 sectional garage gates that are 45 mm thick?

If I were to do it for myself, I would add a regulator and more sections. And presto! We are already far less at the mercy of the TPP’s whims.

Home » Heating » How to figure out how many radiator sections there are

## How to calculate the number of radiator sections

Radiators need to be replaced when updating the heating system, in addition to pipes. And now they come in a variety of sizes, shapes, and materials. They differ in the amount of heat that can be transferred to the air, which is equally significant. Additionally, this must always be considered when calculating the radiator’s sections.

If the amount of heat that escapes is balanced, the room will remain warm. As a result, the calculations are used to determine how much heat escapes the building (they rely on the climate zone, wall material, insulation, window area, etc.D.). One section’s thermal power is the second parameter. At the maximum system settings (90 °C at the input and 70 °C at the output), this is the maximum amount of heat it can produce. This feature, which is frequently seen on the package, must be mentioned in the passport.

With your help, we calculate how many heating radiator sections are needed, taking into account the characteristics of the building and the heating system.

One crucial thing to remember is that, when doing your own calculations, the majority of manufacturers state the highest amount they could have obtained in ideal circumstances. Thus, round up any amounts. When low-temperature heating occurs—that is, when the coolant at the entrance is warmer than 85 °C—thermal power searches for the appropriate parameters or performs a recalculation, as explained below.

## Calculation by area

This is the most straightforward method for estimating how many sections are needed to heat the space. The norms for the average heating power of one square area are shown, based on numerous calculations. In order to account for the region’s climate, two norms were prescribed in SNIP:

- For the regions of the middle band of Russia, from 60 watts to 100 watts are required;
- For areas located above 60 °, the rate of heating per square meter is 150-200 W.

Why is there such a wide range provided in the norms? in order to account for the wall’s composition and level of insulation. The maximum values are used for concrete homes; the middle value can be used for brick homes. Minimal for homes with insulation. Another crucial point to note is that these norms are only calculated for average ceiling heights of 2.7 meters.

Formula for determining the number of radiator sections

Multiply the room’s area by its heat rate to find the setting that works best for you. Determine the room’s overall heat loss. Determine the thermal power of one section from the technical data for the chosen radiator model. Calculate their number by dividing the overall heat loss by power. It’s simple, but we provide an example to help clarify.

### An example of calculating the number of sections of radiators by the area of the room

16 m 2 corner room in a brick house on the middle lane. Will install 140-watt thermal capacity batteries.

We consider heat loss in the middle of the range for a brick home. Given the angular nature of the room, it is best to take more. Decide on 95 watts. Then, it is discovered that 16 m 2 * 95 W = 1520 W is needed to heat the space.

We are now counting the quantity: 10.86 pieces, or 1520 W / 140 W. It comes out to be eleven pieces. There will be a great deal of radiator that needs to be installed.

The square’s heating battery calculation is straightforward but far from ideal because it makes no allowance for ceiling height. A different approach is taken when dealing with non-standard heights: in volume.

## We count the batteries in volume

For the purpose of heating one cubic meter of space, there are standards in SNIP. They are provided for various kinds of buildings:

- For bricks per 1 m 3, 34 watts are required;
- for panel – 41 watts

This radiator section calculation is similar to the last one; the only differences are that volume and norms are taken into account instead of area. We divide the resultant number by the power of a single radiator section (cast iron, bimetallic, or aluminum) after multiplying the volume by the norm.

Formula for figuring out how many sections there are based on volume

### Example of calculation by volume

For instance, we will figure out how many sections a 16 m 2 room with a 3 m ceiling height needs. The structure is made of brick. The same power is used by radiators: 140 W:

- We find the volume. 16 m 2 * 3 m = 48 m 3
- We count the required amount of heat (the norm for brick buildings 34 W). 48 m 3 * 34 W = 1632 W.
- We determine how many sections are needed. 1632 W / 140 W = 11.66 pcs. Round, we get 12 pcs.

You now know two methods for figuring out how many radiators a room has.

## Heat transfer of one section

Radiators come in a wide variety these days. Even though most of them have similar exteriors, thermal indicators can vary greatly. They are contingent upon the material used in their construction, as well as the dimensions, wall thickness, internal section, and overall level of structural planning.

As a result, it is only possible to specify the precise number of kW in one section of an aluminum (cast iron bimetallic) radiator in relation to each model. The manufacturer has indicated these data. Ultimately, there is a noticeable disparity in size: some are low and deep, while others are tall and narrow. The Style 500 and Style Plus 500 tables below show that there can be a 15–25 watt difference in power between sections of the same height from different models made by the same manufacturer. Even more noticeable distinctions may exist between different manufacturers.

Specifications of certain bimetallic radiators. Please be aware that there may be a noticeable difference in thermal power between sections that are the same height.

However, the midpoint of each type of radiator’s heat capacity was determined in order to make an initial assessment of how many battery sections are required to heat the space. Approximate computations can be performed using them (data for batteries with an interax distance of 50 cm are provided):

- Bimetallic – one section selects 185 watts (0.185 kW).
- Aluminum – 190 watts (0.19 kW).
- Cast iron – 120 watts (0.120 kW).

More specifically, when you select a model and determine the dimensions, how many kW you can fit in one section of the bimetallic, aluminum, or cast-iron radiator. There can be a significant variance in cast-iron batteries. Their thermal power varies greatly because of their walls, which can be thin or thick. The average values for loved ones and regular-shaped (accordion) batteries are shown above. The "retro" style of thermal power uses radiators that are significantly smaller.

These are the technical specs for the Turkish manufacturer Demir Dokum’s cast-iron radiators. The distinction is not just noticeable. She has even greater potential.

These numbers, along with the average SNiP norms, indicate the average number of radiator sections per square meter.

- The bimetallic section will heat 1.8 m 2;
- aluminum-1.9-2.0 m 2;
- cast iron-1.4-1.5 m 2;

In light of these data, how many radiator sections are there? Even simpler. Divide the room’s area by the coefficient if you know it. For instance, a 16 m 2 room. To heat it up, you’ll need:

- bimetallic 16 m 2 / 1.8 m 2 = 8.88 pcs, round – 9 pcs.
- aluminum 16 m 2 /2 m 2 = 8 pcs.
- cast iron 16 m 2 / 1.4 m 2 = 11.4 pcs, round – 12 pcs.

Please note that these calculations are only estimates. You can roughly estimate the costs of purchasing heating devices based on them. By selecting a model and counting the number of radiators based on the coolant temperature in your system, you can determine the exact number of radiators in the room.

Room Volume (m³) | Recommended Radiator Size (kW) |

10 – 15 | 0.5 – 1 |

15 – 20 | 1 – 1.5 |

20 – 25 | 1.5 – 2 |

25 – 30 | 2 – 2.5 |

Ensuring that your home’s heating radiators are the proper size is essential to keeping your interior space cozy and energy-efficient. You can make sure you have enough heat to keep your space warm during the winter months by figuring out how much heat each room needs based on its volume.

The size of the room, the amount of insulation, the number of windows, and the intended temperature should all be taken into account when calculating the number of radiators that are required. Larger radiators are needed to make up for heat loss in rooms with higher volumes or inadequate insulation, whereas smaller rooms with better insulation might only require smaller radiators.

A simple formula that accounts for the room’s volume and the desired temperature rise is used to determine radiator size based on room volume. You can calculate the necessary heat output for that space by multiplying the volume of the room by a factor based on the insulation level and dividing the result by the specific heat capacity of air.

It’s crucial to remember that, although it offers a helpful beginning point, radiator size should not be determined solely by room volume. Your heating setup’s effectiveness is also greatly influenced by other factors, like the kind of radiator you use, where you place it in the room, and how efficient the heating system is overall.

In conclusion, for your home to have the best possible comfort and energy efficiency, heating radiators must be sized correctly based on the volume of each room. Your heating system can provide enough warmth without wasting energy if you consider things like room size, insulation, and desired temperature. If you’re unclear about the calculations or need help choosing the appropriate radiators for your house, speak with a heating specialist.

## Video on the topic

### Calculation of heating radiators Part 2

### Calculation of the power of two radiators in one room

### how many radiators are needed for the room, calculation of the radiator for a residential building

### Selection of heating radiators by power and area. The main mistake in the calculations. Correct formula.

**What type of heating you would like to have in your home?**