How many radiators are needed per room: types of products,

19-01-2018

Heating

Many developers and those who make repairs, the question arises how to calculate the number of sections of the radiator for a room. In fact, everything is quite simple, and most importantly - to avoid miscalculations, otherwise the room will be too cold, and you will have to use additional heaters. We will tell you how to carry out all the necessary calculations on your own, and consider the difference between the different versions of products so that you can make the right choice.

Types of products

First of all, you need to decide on a specific option, before choosing room radiators, you should familiarize yourself with the features of each type:

Cast iron	A well-known variant, which has been used for a long time and is distinguished by durability and unpretentiousness, but due to high thermal inertia, the design heats up for a long time, besides, one can not but mention a very large weight that makes it difficult to install with your own hands, and an unattractive appearance, and radiators require periodic staining
Steel	This type of battery weighs much less than the first option, which makes it easier to install and move; also, it’s worth noting such advantages as low price and high heat transfer rates. Of the minuses should be allocated susceptibility to corrosion in the absence of fluid in the system and low resistance to water hammer
Aluminum	Nowadays, this solution is one of the most popular due to such factors as low cost, excellent heat dissipation and attractive appearance of batteries. But due to the fact that the elements may be damaged by hydraulic shocks, and if the heat carrier quality is poor, corrosion develops inside, it is recommended to use this option in individual heating systems.
Bimetal	It is a construction of two materials - steel channels and the outer shell of aluminum alloy. This allows for high strength and durability with excellent heat output. The only downside is the considerable cost.

Note! We do not consider other options, since they are not very common and are very expensive. The only kind that can be mentioned is bimetallic products with a copper core, this is a very effective option that has good performance properties, and if you need high quality, then this solution may be the best.

Copper tubes are very reliable and resistant to corrosion.

Before you choose a heating radiator for a room, consider the features of your system, sometimes you can use only some options.

Features of calculations

Now let's figure out how to calculate heating radiators for a room, everything is quite simple, but it is important not to make mistakes and not do the work on the eyes, as this can lead to the fact that during the cold season you will always be cold.

Methods for determining the required heat output

Developers use many ways to count, but not all of them are accurate and correct, consider the most popular solutions and tell about their features.

Let's start with the simplest and most common option for which you only need to know the area:

It is necessary to divide the area by the thermal power of one edge and multiply the result by 100 (it is exactly the amount of watts required for heating 1 m2 in the middle lane), in the end you will get the required number of sections.

The option is simple, but does not provide the necessary accuracy.

The result is rounded up., Now you know how many radiator sections you need per room. This option can be used for well-warmed buildings with high-quality double-glazed windows, in which case the result will be relevant.

There is another option that was used back in Soviet times to determine how many radiators are needed per room, simply divide its area by a factor of 1.8. This technique was most often used for cast iron radiators, so if you have another option with different characteristics, it is better to consider it differently.

The coefficient calculation was used for cast iron products.

To determine exactly how many sections of radiators you need - you need to make a separate calculation for the room, that is, for each room you determine the result individually.

The most accurate and simple instruction for calculating the required heat output is as follows:

First of all, it is necessary to calculate the volume, that is, measure the length, width and height, and multiply these figures together. The result will be the starting point in the whole process.

Next, the indicator used by the builders and fixed in the norms of SNiP is taken - 41 watts of thermal energy is needed for one cubic meter of air; if the room is thermally insulated and has energy-saving double-glazed windows, this figure drops to 34 watts.
The result is divided by the power of one radiator fin, and you determine the required number of sections.

What factors should be considered

In order for a room radiator to heat a room qualitatively even at the lowest temperatures, it is necessary that its power be matched with a certain margin and taking into account numerous amendments, we will consider the most important and significant of them:

Each window requires adjustment of the required equipment power by at least 5%, and if the design is not reliable, then by 10.
It is important to determine exactly how many radiators should be in the corner room, since the two external walls in the room cause increased heat loss. In this case, it is required to add at least 20, or even 30% to the calculated indicator.
If the radiator is located in a niche or closed by a screen, then its performance indicators are noticeably reduced, the coefficients are shown in more detail in the diagram below.

The location of the heating elements is very important

The method of connecting the input and output lines to the radiator is also very important, this factor influences the heat transfer much more than you think, so we advise you to familiarize yourself with the scheme below to understand which option you have and what amendment you need to make to the final result.

The connection method is very important during settlement work.

For rooms with windows facing north or northeast, it is also necessary to make a correction of 10%. Below is a small table that organizes information and helps you in the calculations.

It is important not to miss a single nuance.

If you decide whether to put radiators in the bathroom, then consider whether this option is the most convenient? Maybe the easiest way is to make a warm floor - and it will be comfortable to move around, and the heating will be of high quality, as an additional source of heat, you can use a massive heated towel rail.

Note! If you have a floor heating system in any premises, then the calculation of radiators is adjusted for the existing heating.

Finally, consider another very common question - how many bimetal radiator sections do you need per room if a cast iron battery is removed? Experts recommend using the same method of calculation plus take into account the characteristics of the product, in particular the heat transfer.

Conclusion

You should not use the most primitive methods of calculation, it is better to spend five minutes, and you will get a more accurate and current result with all the features of the room. The video in this article will help to understand the process even better.