How to calculate a water heated floor: the maximum length of the contour, calculator, photo

Permissible contour length

The length of the circuit must be matched to the pipe diameter

It depends on the pressure in a particular closed loop and hydraulic resistance, the values of which determine the diameter of the pipes and the volume of fluid that is supplied to them per unit of time.

When installing a warm floor, situations often occur when the circulation of the coolant in a separate loop is disturbed, which cannot be restored by any pump, the water is locked in this circuit, as a result of which it cools down. This results in pressure losses of up to 0.2 bar.

Based on practical experience, the following recommended sizes can be adhered to:

Less than 100 m can be a loop made from a 16 mm diameter reinforced plastic pipe. For reliability, the optimum size is 80 m.
No more than 120 m is assumed to be a maximum loop length of 18 mm of XLPE pipe. Experts try to install a circuit with a length of 80-100 m.
No more than 120-125 m is considered an acceptable loop size for metal-plastic with a diameter of 20 mm. In practice, they also try to reduce this length to ensure sufficient reliability of the system.

how to calculate the power and length of the circuit

In order to avoid unnecessary costs and technological errors that can lead to a partial or complete alteration of the system with your own hands, the calculation of a water heated floor is made in advance, before starting installation. The following input is required:

The materials from which the housing is built;
The presence of other sources of heating;
Room area;
The presence of external insulation and the quality of glazing;
Regional location of the house.

You also need to determine what the maximum air temperature in the room is required for the comfort of the residents. On average, it is recommended to design a water floor contour at the rate of 30-33 ° C. However, such high rates during operation may not be needed, a person feels as comfortable as possible at temperatures up to 25 degrees.

In the case when additional heat sources are used in the house (air conditioning, central or autonomous heating, etc.), the calculation of the warm floor can be focused on the average maximum indicators of 25-28 ° С.

Advice! It is strongly discouraged to connect warm water floors with your own hands directly through the central heating system. It is advisable to use a heat exchanger. An ideal option is a completely autonomous heating and connection of warm floors through a manifold to the boiler.

Power calculation

The efficiency of the system directly depends on the material of the pipes through which the coolant will move. There are 3 varieties:

Copper;
Polyethylene or cross-linked polypropylene;
Reinforced plastic.

Copper pipes have maximum heat transfer, but a rather high cost. Polyethylene and polypropylene pipes have low thermal conductivity, but are relatively cheap. The best option in terms of price and quality is metal-plastic pipes. They have a low heat transfer consumption and a reasonable price.

Experienced professionals primarily take into account the following parameters:

Determination of the value of the desired t in the room.
Correctly calculate the heat loss at home. To do this, you can use calculator programs or invite a specialist, but it is also possible to make an approximate calculation of heat loss yourself. A simple way to calculate a warm water floor and heat loss in a room is the average value of heat loss in a room - 100 W per 1 sq.meter, taking into account the ceiling height no more than 3 meters and the absence of adjacent unheated rooms. For corner rooms and those with two or more windows - heat loss is calculated based on the value of 150 W per 1 sq. meter.
Calculation of how much the heat loss of the circuit will be for each m2 of the area heated by the water system.
Determination of heat consumption per m2, based on the decorative coating material (for example, ceramics have a higher heat transfer than laminate).
Calculation of surface temperature, taking into account heat loss, heat transfer, desired temperature.

On average, the required power for every 10 m2 of paving area should be about 1.5 kW. In this case, you need to take into account point 4 in the above list. If the house is well insulated, the windows are made of a high-quality profile, then 20% of the power can be allocated for heat transfer.

Accordingly, with a room area of 20 m2, the calculation will take place according to the following formula: Q = q * x * S.

3kW * 1.2 = 3.6kW, where

Q - required heating power,

q = 1.5 kW = 0.15 kW is a constant for every 10m2,

x = 1.2 is the average heat loss coefficient,

S is the area of the room.

Attention! The above formula for how to calculate a warm floor is as simplified as possible, since it is not taken into account that the pressure in the system can also decrease.

Before starting the installation of the system with your own hands, it is recommended to draw up a plan diagram, to accurately indicate the distance between the walls and the presence of other heat sources in the house. This will allow you to calculate the power of the water floor as accurately as possible. If the area of the room does not allow the use of one circuit, then it is correct to plan the system taking into account the installation of the collector. In addition, you will need to do it yourself with a cabinet for the device and determine its location, distance to walls, etc.

How many meters is the optimal length of the circuit

h3_2
There is often information that the maximum length of one circuit is 120 m.This does not quite correspond to the truth, since the parameter directly depends on the diameter of the pipe:

16 mm - max L 90 meters.
17 mm - max L 100 m.
20 mm - max L 120 m.

Accordingly, the larger the pipeline diameter, the lower the hydraulic resistance and pressure. This means that the contour is longer. However, experienced craftsmen recommend not to "chase" the maximum length and choose pipes D 16 mm.

It is also necessary to take into account that it is problematic to bend thick pipes D 20 mm, respectively, the laying loops will be greater than the recommended parameter. And this means a low level of efficiency of the system, because the distance between the turns will be large, in any case, you will have to make a square contour of the snail.

If one circuit is not enough to heat a large room, then it is better to mount a double-circuit floor with your own hands. At the same time, it is strongly recommended to make the contours of the same length so that the heating of the surface area is uniform. But if the difference in size still cannot be avoided, an error of 10 meters is allowed. The distance between the contours is equal to the recommended pitch.

Hydraulic pitch between turns

The uniformity of surface heating depends on the size of the step of the turn. Usually 2 types of pipe laying are used: snake or snail.

It is preferable to make the snake in rooms with minimal heat loss and a small area. For example, in a bathroom or corridor (since they are inside a private house or apartment without contact with the outside environment). The optimal loop pitch for the snake is 15-20 cm. With this type of installation, the pressure loss is approximately 2500 Pa.

Snail loops are used in spacious rooms. This method saves the length of the circuit and makes it possible to evenly heat the room, both in the middle and closer to the outer walls. The loop step is recommended within 15-30 cm. Experts say that the ideal step distance is 15 cm. The pressure loss in the cochlea is 1600 Pa.Accordingly, this do-it-yourself laying option is more profitable in terms of the efficiency of the system's power (you can cover a smaller usable area). Conclusion: the snail is more efficient, the pressure drops in it less, and accordingly the efficiency is higher.

The general rule for both schemes is that closer to the walls the step must be reduced to 10 cm.Accordingly, from the middle of the room, the loop loops are gradually compacted. The minimum laying distance to the outer wall is 10-15 cm.

Another important point is that you cannot lay the pipe on top of the seams of concrete slabs. It is necessary to draw up a diagram so that the same location of the loop between the joints of the slab on both sides is observed. For DIY installation, you can draw a diagram in advance on a rough screed with chalk.

How many degrees is allowed with temperature drops

System design, in addition to heat and pressure losses, implies temperature differences. The maximum difference is 10 degrees. But it is recommended to focus on 5 ° C for even system operation. If the preset comfortable temperature of the floor surface is 30 ° C, then the direct pipeline should supply about 35 ° C.

Pressure and temperature, as well as their losses, are checked during pressure testing (checking the system before the final pouring of the final screed). If the design is done correctly, then the specified parameters will be accurate with an error of no more than 3-5%. The higher the difference t, the higher the floor power consumption.

How to arrange heating pipes

Based on how it is more convenient for the master, communications can be arranged in 4 options:

Snake.
Corner snake.
Double snake.
A snail.

The correct calculation of the heating system is a difficult task, but quite feasible with a step-by-step approach.

It is problematic to take into account absolutely all the nuances when installing a warm floor, therefore it is worth paying attention to the most important characteristics, namely the length of the pipes and the volume of water in them. In addition, it is worth remembering that even a slight excess of the circuit length of 100 m can seriously harm the system and give out at the outlet far from the expected temperature.

The double-circuit model, in turn, will be much more efficient, which will allow you to heat the house without much hassle and with less resource consumption.

In almost every country house, a warm floor is necessarily installed. Before such heating is created, the required pipe length is calculated.

Each such private house has an autonomous heating system. If the layout of the premises allows, the owners of such country estates themselves mount a warm water floor.

Of course, the installation of such a floor can be done in an ordinary apartment, but this work is very laborious. Owners and employees have many problems to solve. The main difficulty will be connecting the pipe to the existing heat supply system. It is simply impossible to install an additional boiler in a small apartment.

The amount of heat that must be supplied to the room so that there is always a comfortable temperature in it depends on the correctness of this calculation. The calculations carried out will help determine the power of the warm floor, and will also help to make the right choice of the boiler and pump.

It is very difficult to perform this calculation. You have to take into account quite a few very different criteria:

Season;
Outdoor air temperature;
Room type;
Number and dimensions of the window;
Floor covering.
Wall insulation;
Where the room is located, below or on the upper floors;
Alternative heat sources;
Office equipment;
Lighting.

To make it easier to perform such a calculation, average values are taken. If a double-glazed window is installed in the house and good insulation is made, this parameter will be approximately equal to 40 W / m2.

Warm buildings with little thermal insulation constantly lose about 70–80 W / m2.

If you take an old house, heat loss increases dramatically and approaches 100 W / m2.

In new cottages, where no wall insulation has been done, where panoramic windows are installed, losses can be about 300 W / m2.

Having chosen an approximate value for your room, you can start calculating the replenishment of heat losses.

How is the calculation of the length of the coolants

The calculation of the length of the pipeline is based on the combination of different parameters:

the size of the room;
required air temperature;
inlet and outlet temperature;
the location of the pipes, the distance between them;
type of floor finish;
the thickness of the screed under and above the system;
the length of the supply line.

In some cases, additional key figures are required for costing. The most important is the location of the heat transfer media in the screed.

There are general rules that masters and amateurs are guided by.

The distance from the wall to the outer contour of the pipes is 20-30 cm.
The gap between the pipes is 30 cm (the diameter of the coolant itself is taken into account - 3 mm).
The distance from the end of the pipe to the collector is approximately 40 cm.

Including these indicators, the maximum length of the water floor contour is calculated.

Temperature indicators

The temperature regime in the coolant affects the size of the pipeline. To move comfortably on the floor, the water must be heated to a maximum of 60 degrees. The optimal heating of the surface itself depends on the purpose of the room:

residential - 29 degrees;
checkpoints - 35 0;
workers - 33 0.

To control and regulate this indicator, sensors are installed. There are usually 2 of them: at the entrance and exit from the system. The temperature difference on these devices is no more than 5 degrees.

When the underfloor heating system is operating, water circulates through the pipes. Passing along the entire circuit, it cools. The overall length of the pipe affects the speed of this process.

Collector

The manifold is the main element of the underfloor heating system, which serves as its beginning and end. These devices have 2 modifications: internal (installed in the floor) and external (installed indoors on the wall). When calculating the length of the water heating floor contour, the supply of heat carriers to this device is taken into account.

Amount of water

To create a water underfloor heating, the amount of fluid consumed is a priority indicator. The lack of it will lead to rapid cooling of the system and the surface. The option for calculating the consumed water can be as follows:

20 sq.m. - the area of the room;
27 cm - the distance between the pipes;
15 pipes - the number of main parts for creating a snake;
40 cm is the distance from the pipe to the collector.

Taking these indicators into account, the maximum contour length will be 51 meters. These are the overall dimensions of all parts.

If the dimensions of the room are such that the maximum pipe length exceeds 100 m, it is better not to install the water circuit. Its effectiveness will be low. 70 m are considered optimal.If it is necessary to install a warm floor on an area exceeding 100 m, it is worth creating 2 approximately identical contours. For example, the first is 62.5 m, the second is 77.5.

A 51 m pipeline will require 17.5 liters of water. This amount of liquid must be present in the system. A pump is used to replenish it. It makes water circulate, helps to recover losses from natural evaporation.

Calculations of the required water

Calculating the amount of water required for the system is quite simple. For clarity, a snake arrangement of communications will be taken.
In order not to be mistaken in the calculations, you need to take into account a number of indicators, including such as the length of the contour of the water heated floor, as well as:

The diameter of the pipe used is from one border to the other, since it is the inner space that is interesting (the best option is to use a 2 cm diameter).
The distance from the wall to the pipes, which should be within the range of 20 to 30 cm.It is best to limit yourself to 20 cm.
The distance between the pipes should be about 30 cm.In addition, it is worth keeping in mind that the pipe itself takes 3 cm, so in practice the distance will be 27 cm (read also: "Calculating the length of the pipe for a warm floor: useful recommendations").

Having dealt with the first stage of the installation of a water-heated floor, it is necessary to determine the area of the room, since this will have a direct impact on such an indicator as the length of the contour of the water-heated floor. For example, a room that is 4 m wide and 5 m long can be taken as a guideline. The pipeline must be laid starting from the smaller side of the room. However, you need to know how many are needed and understand how to calculate the length of the pipe for a warm floor.

About 15 pipes will be used to create the base of the pipeline. In addition, there will still be an extra 10 cm gap near the walls, which will be necessary to increase this distance by 5 cm on each side.
Considering the distance from the section with the collector to the pipeline, you get a distance of 40 cm.It exceeds the original 20 cm because it is necessary to mount a water drainage channel, which will also take 20 cm (about

Water floor installation technology

To gain experience in installing a water heated floor, it is worth trying to make it on a small surface area. The pipe system is mounted in two ways: cold on a wooden (polystyrene) base and wet in a screed.

The dry method is as follows:

metal strips are placed on a wooden flooring or polystyrene mats, in which channels are created along the width of the pipes;
pipes are inserted into the recesses;
then put a layer of plywood (OSB, GVL, etc.);
then the flooring is laid.

A more complicated, time-consuming, but budgetary method is a "wet" cement screed. This is a multi-layer construction. It is based on a concrete surface and consists of several levels:

- thermal insulation;
- fixing elements (mesh, tapes);
- tubular heat carriers;
- cement-sand mortar - screed;
- flooring.

In apartment buildings, in order to protect the neighbors from the gulf from below, waterproofing material is first laid. It is advisable to put a reinforcing mesh on the pipes themselves in order to reduce the mechanical stress. A damper tape is attached around the perimeter of the room and between the contours. It is the border between the wall and the floor, different fragments of the warm floor.

Both methods have their pros and cons. Which one is preferable depends on the individual characteristics of the room, the preferences of the owners, the possibilities of attracting craftsmen, or the need for do-it-yourself installation.

When installing the pipeline in a screed, the maximum length of the circuit may be greater. Concrete is a cold material. To heat it, a high temperature of the water in the system is required. It cools down faster than wood or artificial products

When installing a warm floor, it is important to provide for all the nuances, including installation technology

Installing a water-based floor heating system is a time consuming, troublesome task. It requires accurate calculation and extremely careful attention to the installation. Differences in base heights, errors in the placement of loops, turns, defects in the main parts will lead to ineffective operation of the entire heating element. The maximum length of the underfloor heating is determined individually for each house. In order not to make a mistake, it is worth contacting specialists. A small cost for a professional consultation will save you from mistakes in the operation of the facility and provide the necessary conditions for comfort.

Views count: 362

Electric-water underfloor heating xl pipe Electric underfloor heating - pros and cons Infrared underfloor heating - why it is worth installing Plastic underfloor heating - device features

One of the conditions for the implementation of high-quality and correct heating of a room using a warm floor is to maintain the temperature of the coolant in accordance with the specified parameters.

These parameters are determined by the project, taking into account the required amount of heat for the heated room and floor covering.

Heating installation

For underfloor heating a project needs to be done. It is recommended to complete a drawing. Determine the size of the usable area, the diameter of the pipe and the step with which the line will be installed. In order to determine the number of branches, the maximum length of the underfloor heating contour is taken into account.

If the pitch of the branch is 10 cm, then it is recommended to carry out the installation of the line with a "snail". With this technique, you can position the contour with a minimum distance between the turns. When performing a snake, it will be difficult to lay the liquid floor guide with a small pitch.

The bending radius of the loop should be 5 diameters. If the length of the water circuit exceeds the permissible standard for footage, then 2 branches are organized: you can use a combined installation technique with both a "snake" and a "snail".

Underfloor heating device

The liquid heating outputs are connected to the manifold. The number of outlets in the manifold must correspond to the number of calculated heating element branches. Each end must have a connection with a pipe through which the coolant enters the system, and an outlet from which the cooled liquid leaves the line.

Both metal and plastic heating elements can be used for heating: diameter 16-25 mm. For the liquid that leaves the boiler to the collector, it is recommended to remove the circuit from galvanized steel. Diameter 26 * 2 mm. This is due to the increased temperature of the coolant.

In order to install an alternative heating system in the house, it is necessary to carefully consider its capacity. It is possible to calculate the length of the water supply using a special calculator. The program determines how many pipes are needed to organize the liquid line, and calculates the number of water circuits. In accordance with the data, the project of the heated surface in the premises is being carried out.

YouTube responded with an error: Access Not Configured. YouTube Data API has not been used in project 268921522881 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/youtube.googleapis.com/overview?project=268921522881 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.

How to install Eastec underfloor heating?
How to install a water-heated floor with your own hands?
How to choose a thermostatic valve for underfloor heating?
How to install a warm floor in the house?
What are the characteristics of Aura underfloor heating?
What are the characteristics of the Rehau pipe for underfloor heating?

Why is it better to use a pipe with an outer diameter of 16 mm

To begin with, why is it the 16 mm pipe being considered?

Everything is very simple - practice shows that for "warm floors" in a house or apartment this diameter is quite enough. That is, it is difficult to imagine a situation when the contour will not cope with its task. This means that there is no really justified reason to use a larger, 20 mm one.

And at the same time, the use of a 16 mm pipe provides a number of advantages:

First of all, it is about a quarter cheaper than its 20mm counterpart. The same applies to all the necessary fittings - the same fittings.
Such pipes are easier to lay, with them it is possible, if necessary, to perform a compacted step of the contour layout, up to 100 mm. With a 20 mm pipe, there is much more fuss, and a small step is simply impossible.

The volume of the coolant in the circuit is significantly reduced. A simple calculation shows that a running meter of a 16-mm pipe (with a wall thickness of 2 mm, the inner channel is 12 mm) holds 113 ml of water. And in 20 mm (inner diameter 16 mm) - 201 ml. That is, the difference is more than 80 ml for just one meter of pipe. And on the scale of the heating system of the whole house - this literally translates into a very decent amount! And after all, it is necessary to ensure the heating of this volume, which entails, in principle, unjustified costs for energy carriers.
Finally, a pipe with a large diameter will also require an increase in the thickness of the concrete screed. Whether you want it or not, you will have to provide a minimum of 30 mm above the surface of any pipe. Let not these "unfortunate" 4–5 mm seem ridiculous.Anyone who was engaged in pouring the screed knows that these millimeters turn into tens and hundreds of kilograms of additional concrete mortar - it all depends on the area. Moreover, for a 20 mm pipe, it is recommended to make the screed layer even thicker - about 70 mm above the contour, that is, it turns out to be almost twice as thick.

In addition, in living quarters there is often a "struggle" for every millimeter of floor height - simply for reasons of insufficient "space" to increase the thickness of the overall "pie" of the heating system.

The 20-mm pipe is justified when it is necessary to perform a floor heating system in rooms with high loads, with a large traffic intensity, in gyms, etc. There, simply for reasons of increasing the strength of the base, it is necessary to use more massive thick screeds, for heating which a large heat exchange area is also required, which is precisely what the pipe 20, and sometimes even 25 mm, provides. In living quarters, there is no need to resort to such extremes.

It may be objected that in order to "push" the coolant through a thinner pipe, it will be necessary to increase the power indicators of the circulation pump. Theoretically, this is the way it is - the hydraulic resistance, of course, increases with decreasing diameter. But as practice shows, most circulation pumps can cope with this task.

Below we will pay attention to this parameter - it is also linked to the length of the contour. That is why calculations are carried out in order to achieve optimal, or at least acceptable, quite workable indicators of the system.

So, let's focus on the pipe exactly 16 mm. We will not talk about the pipes themselves in this publication - that is, there is a separate article on our portal.

Calculation by a computer program

A special program that makes it easier to carry out calculations

For the calculation you will need:

enter data describing the room in which the floor is supposed to be installed;
determine the initial data for the calculation. Basic data includes:
indoor humidity;
floor covering area;
the number of windows, entrance doors and walls facing the street;
calculate heat losses;
locate equipment and piping. The design is carried out according to the specified parameters, that is, the program will reflect the entered information schematically;

Scheme of laying floor pipes, drawn up according to the specified parameters

calculate the amount of materials for the floor. The program will automatically calculate the footage of the pipe for a warm floor and other parameters that must be taken into account when arranging an additional heating source;
using the program, you can also calculate:
the required power of the heating boiler and other equipment required for arranging the floor: an expansion tank, a pump that supplies water to the system, and so on.

A detailed description and an example of using the VALTEC program is presented in the video.

Correct calculation is the key to installing an optimal floor structure. It is desirable that the calculation is carried out by qualified specialists who, having determined all the conditions, will be able to calculate the optimal parameters. If the floor is laid independently, then it is recommended to use computer programs for the calculation.

findings

The calculation of a water heated floor is always approximate, but this does not mean that it should not be carried out, and even more so, not take into account the data obtained. After all, they accurately reflect both the room configuration, the piping layout and the characteristics of that installation.

And these are the parameters that are recommended to be observed as accurately as possible.Calculations will allow you to "feel" your idea of floor heating and, possibly, to understand the feasibility of its application. There will be time to think carefully about everything, and this is another positive factor in the calculations.

Laying is greatly simplified if it is carried out on special mats with fixing protrusions - they also serve as waterproofing at the same time

Methods for installing the underfloor heating system

For the proper functioning of this heating system, a clear sequence of layers of the so-called “cake” of the warm floor is important.

The thermal circuit is laid on a previously heat-insulated and waterproofed surface, and from above it is poured or covered with a cement screed, on top of which the finishing floor covering is laid. The above layers - the cake shell - are required in both cases. They protect the system from external influences and increase its efficiency.

Warm floors are an excellent solution for the improvement of your home. The floor temperature directly depends on the length of the floor heating pipes hidden in the screed. The pipe in the floor is laid in loops. In fact, from the number of loops and their length, the total length of the pipe is added. It is clear that the longer the pipe in the same volume, the warmer the floor. In this article, we will talk about the restrictions on the length of one contour of the warm floor.

Approximate design characteristics for pipes with a diameter of 16 and 20 mm are: 80-100 and 100-120 meters, respectively. These data are approximate for approximate calculations. Let's take a closer look at the process of installing and pouring underfloor heating.

The consequences of exceeding the length

Let's figure out what consequences an increase in the length of the underfloor heating pipe can lead to. One of the reasons is an increase in hydraulic resistance, which will create an additional load on the hydraulic pump, as a result of which it may fail or simply cannot cope with the task assigned to it. Resistance calculation consists of many parameters. Conditions, styling parameters. The material of the pipes used. There are three main ones: loop length, number of bends and heat load on it

It is worth noting that the heat load increases with increasing loop. The flow rate and hydraulic resistance also increase. There are restrictions on the flow rate. It should not exceed 0.5 m / s. If we exceed this value, various noise effects may occur in the piping system. The main parameter, for the sake of which this calculation is done, also increases. The hydraulic resistance of our system. There are also restrictions on it. They are 30-40 kP per loop.

The next reason is that with an increase in the length of the underfloor heating pipe, the pressure on the pipe walls increases, causing this section to elongate when heated. The pipe in the screed has nowhere to go. And it will begin to taper at its weakest point. The restriction can cause blockage of the flow in the heating medium. Pipes made from different materials have different expansion coefficients. For example, polymer pipes have a very high coefficient of expansion. All these parameters must be taken into account when installing a warm floor.

Therefore, it is necessary to fill the underfloor heating screed with pressed pipes. It is better to pressurize with air at a pressure of about 4 bar. Thus, when you fill the system with water and start heating it, the pipe in the screed will be where it will expand.

Optimal pipe length

Considering all of the above reasons, taking into account the corrections for the linear expansion of the pipe material, we take as a basis the maximum length of the underfloor heating pipes per circuit:

What is the optimal length of the underfloor heating pipe?

Let's find out the optimal length of the underfloor heating pipe and what the consequences can be if the circuit is longer. Everything in our article

Care

If you adhere to simple rules, the service life of the floor heating system can exceed a fifty-year period. When using warm floors, you should take into account the following nuances:

Seasonality of operation. If, for some reason, freezing of the premises is possible during the winter period, it is necessary to use an antifreeze solution in the heating circuit, which prevents the liquid from passing into a solid state of aggregation. Expanding, the ice may well damage the integrity of the circuit. The choice of materials for a warm water floor is also an important operating factor.
When performing construction work related to drilling, punching holes in ceilings, it is necessary to strictly imagine the location of communications. To do this, immediately after laying the pipes, you should make a sketch of the location of the system with references to objects of constant geometry - walls, doorways. Additionally, you can take pictures of the pipe laying scheme.
You should also avoid exceeding the temperature values of the coolant above the recommended limits. Failure to do so may result in excessive expansion of pipes and surrounding materials, which could lead to a leak in the circuit.

How to determine the optimal room temperature

In this case, there are no special difficulties. For orientation, you can use the recommended values, or come up with your own. Moreover, the floor covering must be taken into account.

The floor of the living space should be heated to 29 degrees. If the distance from the outer walls is more than half a meter, the floor temperature should reach 35 degrees. If the room is constantly high in humidity, you will need to heat the floor surface to 33 degrees.

If the house has wooden parquet, the floor must not be heated above 27 degrees, as the parquet may deteriorate.

Carpet is able to retain heat, it makes it possible to increase the temperature by about 4-5 degrees.

Calculation of the power of a water-heated floor

It begins in the same way as in the previous method - with the preparation of graph paper, only in this case it is necessary to apply not only contours to it, but also the location of windows and doors. Draw scaling: 0.5 meter = 1 cm.

To do this, it is worth considering several conditions:

Pipes must be placed along the windows to prevent significant heat loss through them.
The maximum area for arranging a warm floor should not exceed 20 m2. If the room is larger, then it is divided into 2 or more parts, and a separate contour is calculated for each of them.
It is necessary to maintain the required value from the walls to the first branch of the contour of 25 cm.

The choice of the diameter of the pipes will be influenced by their location relative to each other, and it should not exceed 50 cm.The value of heat transfer per 1 m2 equal to 50 W is achieved with a pipe spacing of 30 cm, if in the calculation it turns out to be larger, then it is necessary to reduce the pipe spacing.

Determining the number of pipes is quite simple: first measure their length, and then multiply it by a scale factor, add 2 m to the resulting length to supply the circuit to the riser. Considering that the permissible pipe length is in the range from 100 to 120 m, the total length must be divided by the selected length of one pipe.

The parameter of the underfloor heating is determined based on the area of the room, which is obtained after multiplying the length and width of the room. If the room has a complex configuration to obtain an accurate result, it must be divided into segments and the area of each of them must be calculated.

System power

In order to determine the length of the water floor, it is necessary to calculate how much system power is required to heat the usable area. For this, there are special calculators that contain calculation programs. Specialists have drawn tables. They indicate the norms for heating rooms with various heat losses.

Depending on these indicators, a floor line of a certain capacity is installed. For 10 m2, 1 kW of energy is needed. How to calculate a pipe for a warm floor?

To create a normal microclimate in the living room, heating equipment must have a power of 120 W / m2. The same indicator is maintained for the bedroom, children's room.
The balcony and the veranda belong to cold rooms with high heat losses, therefore, they provide for a large equipment power, 150-180 W / m2.
Rooms on the ground floor and basement level require an energy of 130 W / m2.

When calculating the power of underfloor heating using a calculator, data on the size of the room, the number of windows, the height of the ceiling, and the duration of the building's operation are entered into the program. Information about the insulation of the floor, walls and roof is taken into account. Normal indoor temperature:

living room, children's room - 29 0С;
bedroom - 18 0С;
bathroom and toilet - 33 0С;
near windows - 35 0С.

For effective heating, it is necessary to place the water floor on an area of 70%. If the room is 6 * 4 m in size, then its area will be 24 m2. There is 20% of the room under the stationary furniture. It will take about 19 m2 of floor heating. I place pipes for underfloor heating on an area of about 13 m2. If it is necessary to install a water main in the living room, then a power of 1560 watts will be required from the heating elements.

We recommend: Is it possible to lay underfloor heating under linoleum?

How to calculate the length of the pipe for a warm floor

Today it is difficult to imagine a country house without floor heating. Before starting the installation of heating, it is necessary to calculate the length of the pipe that is used for the warm floor. Almost every country house has its own heating system, the owners of such houses independently install a water floor - if this is provided for by the layout of the premises. Of course, it is possible to install such a warm floor in apartments, but such a process can bring a lot of trouble to both apartment owners and employees. This is due to the fact that it is impossible to bring a warm floor to the heating system, and it is problematic to install an additional boiler.

The size and shape of a pipe for a warm floor can be different, therefore, in order to understand how to calculate a warm floor, you need to understand in more detail the system and structure of such a system.

Is it possible to mount a warm floor with a different length of the contour

Underfloor heating is considered ideal, where each loop has the same length. This will allow you not to do additional tuning, you do not need to adjust the balance.

Of course, the length of the contour can be the same, but this is not always beneficial.

For example, an object consists of several rooms in which it is necessary to install a warm floor. One of these premises is a bathroom, with an area of 4 sq. meters. The total length of a pipe of such a circuit, taking into account the distance to the collector, will be equal to 40 m.Undoubtedly, no one will adjust to this size, dividing the useful area under 4 sq. meters. This division would be completely unnecessary. After all, there is a special balancing valve with which you can equalize the pressure of the circuits.

Today, you can also perform a calculation to determine the maximum size of the pipe length relative to each circuit, taking into account the type of equipment and the area of the object.

We are not going to tell you how these complex calculations are done. Just when installing a warm floor, the variation in the length of the pipeline of a separate circuit is taken within 30 - 40%.

In addition, when there is a need, it becomes possible to "manipulate" the pipe diameters. It becomes possible to change the laying step, divide large areas into several medium pieces.

Required data for calculation

The efficiency of the heating system depends on a correctly laid circuit.
To maintain the set temperature in the room, it is necessary to correctly calculate the length of the loops used for the circulation of the coolant.

First, you need to collect initial data, on the basis of which the calculation will be made and which consists of the following indicators and characteristics:

the temperature that should be above the floor covering;
layout of loops with a coolant;
distance between pipes;
maximum possible pipe length;
the ability to use several contours of different length;
connection of several loops to one collector and to one pump and their possible number with such a connection.

Based on the listed data, it is possible to perform the correct calculation of the length of the underfloor heating circuit and thereby ensure a comfortable temperature regime in the room with minimal energy costs.

Installation of a water heated floor in the house

The heat carrier in the floor is mounted in the form of a single or double snake, spiral. The total length of the pipe depends on the choice of the location of the circuit. The ideal option is turns of the same size. However, in practice, it is difficult and impractical to create uniform loops.

When the floor is made throughout the house, the parameters of the premises are taken into account. In the bathroom, bathroom, hallway, which take up a smaller area compared to the living room, bedroom or other rooms, it is difficult to create large coils in length. They do not require a lot of pipes to heat them. Their length can be limited to a few meters.

Some zealous owners bypass these premises when installing a water circuit. This saves materials, labor and time. It is more difficult to install a warm floor in small rooms than in spacious ones.

If the system bypasses such nooks, it is important to correctly calculate the maximum pressure parameters in the system. For this, balancing fittings are used.

It is designed to equalize the pressure loss in different circuits.

Methods for laying the contour of a warm water floor

When we carry out the installation, the line can be laid out in the following ways:

For spacious rooms with a simple geometric configuration, it is worth using the snail method. For small rooms of complex shape, it is more convenient and more effective to use the snake method.

These methods, of course, can be combined with each other.

The footage of the pipe for a warm floor is calculated depending on the diameter of the line and the size of the room.

The smaller the laying step, the better and better the housing heats up, but on the other hand, then the costs of heating the coolant, materials and installation of the structure increase significantly. The maximum step size can be 30 centimeters, but this value cannot be exceeded, otherwise the human foot will feel the temperature difference. There will be more heat loss near the outer walls, therefore, the step of laying the line in these places should be less than in the middle.

The material for the manufacture of pipes is polypropylene or cross-linked polyethylene. If you use polypropylene pipes, it is worth choosing the option with fiberglass reinforcement, since polypropylene tends to expand when heated. Polyethylene pipes behave well when heated and do not need reinforcement.