Which diameter of the pipe for a warm floor is better to use. the calculation of the diameter, depending on the pipe material
The heating system called “Warm Paul” only then efficiently and for a long time functions when its calculations are made and the right choice of pipes. The diameter is considered one of their main characteristics.
It depends on this parameter, whether the flooring will warm up to the desired temperature. According to experts, a 16-mm pipeline cross-section allows the system to cope with the heat supply of the room.
General information on the results of calculations
Calculator works in test mode. Date of adding calculator 11.03.2018
General information on the results of calculations
Calculator works in test mode. Date of adding calculator 11.03.2018
Calculation of pipe length
To calculate how many pipes are needed for warm water floor, use the following formula:
S / H x 1.1 D x 2 = L
The 1.1 coefficient in the formula is the required reserve of 10%. When laying the floor, unused trimming may remain, incorrectly cut or erroneous dumpled pieces of pipes. To consider them you need to add these 10%.
The distance between the pipes of the warm floor depends on the diameter of the pipes and the need for heat. If you want to calculate yourself, you can use this table:
Calculate the area of the room: 4 x 3,5 = 14 kV.M.
We substitute the values in the formula and get: 14 / 0.2 x 1.1 2.5 x 2 = 82 tube meters.
Water floor calculation
Calculations of the heating water system must be made extremely thoroughly. Any errors can further lead to additional costs, since it can be fixed only with a full or partial dismantling of a screed, and this can damage the inner decoration.
Before proceeding with the calculations of the amount of power, you need to know several parameters.
Parameters for water floor
The power of the heating system is influenced by several factors, such as:
These parameters also help to calculate the length of the pipes for the underfloor and their branches, for heating rooms.
Methods of capacity calculations
Independently produce power calculations is very difficult, as you need the skill and experience. For these reasons it is better to order in the relevant organization, where engineers are working. technologists. If still the calculation is made independently, then for the average value take 100 watts per square meter. This technique is used in multi-storey buildings.
In the private houses, the average power will depend on the area of the building. Thus, the following indicators are drawn up by specialists:
Having considered the method of calculating power, you need to calculate the number of pipes. But for this, first should be familiar with the methods of their installation.
Underfloor heating pipe and how to calculate how much you need
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How many pipes for warm water floor
Control the temperature of the coolant can be thermometers using such thermometers by setting them to feed and on the return. The return should be colder to 5-10 degrees. If the difference is more, the system works incorrectly: either too long loops, or low pump performance.
For the user it does not matter the temperature of the coolant. It is important to the temperature of the surface of the working heap floor. It should not exceed the following values:
For layout of floor heating pipes, various forms are used: snake, angular snake, double snake, snail.
These forms can be combined in any combinations, for example, the edge zone can be located a snake, and then the main part of the snail. At the same time, it is better to use snail at maximum. Snake use in small rooms, or indoors with a complex form
For edge zones, a step is used equal to 10 cm. For the remaining zones with a difference of 5 cm. 15 cm, 20 cm, 25 cm. But no more than 30 cm.
This restriction is associated with the sensitivity of the human foot. With a larger foot of the pipes, the foot begins to feel the difference in temperature of the floor.
S. The area of the room or contour for which the length of the pipe is calculated (m2); N. laying step; 1,1. Pipe reserve at 10% on turns.
To the resulting result, do not forget to add the length of the pipe from the collector to the warm floor, including the flow and reverse.
For example, consider the task in which you need to calculate the length of the pipe for the room in which the floor occupies a useful area of 12 m2. Distance from the collector to the warm floor. 7 m. Pag step 15 cm (do not forget to translate into m).
It all depends on the hydraulic resistance or pressure loss in a specific circuit, which, in turn, directly depend on both the diameter of the pipes used and the volume of the coolant, which is supplied through the cross section of these pipes per unit of time.
In the case of a warm floor, (if not to take into account the above factors) you can get the effect of the so-called locked loop. The situation at which how powerful would be not installed in step by step, circulation through this loop will not be possible.
In practice, it has been established that pressure loss equal to 20 kPa or 0.2 bars just lead to such an effect.
In order not to go into calculations, we give some recommendations used by us in practice. For a pipe with a diameter of 16 mm we make the contour no more than 100 m, ideally no more than 80 m. For 20 pipes, the maximum loop length is 120-125 m.
For example, the facility has a group of rooms where it is necessary to make a warm floor. Among them also have a bathroom, a useful area of a warm floor in which 4 m2. Accordingly, the length of the pipeline of this circuit together with the length of the pipes to the collector is only 40 m. Do not all premises need to be configured under this length, fraction of the useful area of the remaining premises of 4 m2?
Of course not. This is not advisable. And then for what balancing fittings, which is just designed to help equalize pressure loss in contours?
Again, you can use the calculations through which you can see to which maximum limit can be allowed to dismiss the lengths of the pipes of individual circuits on a specific object with this equipment.
But again, without immersing you in complex boring calculations, let’s say that we allow us to spread the spreads on the lengths of the pipes of individual circuits at 30. 40%. Also, if necessary, you can “play” the diameters of the pipes, the step of laying and “cut” the area of large rooms is not on small or large, but on medium slices.
On the question: “How many loops can be connected to a heating floor collector?”You need to take into account the diameter of the collector and how much the coolant is able to pass through itself a node of mixing per unit of time (it is considered to be M3 / hour). Or, which is also equal, which heat load is capable of carrying the mixing knot you selected?
Suppose you took the combimix company Valtec as a mixing node. What thermal load it is designed? We take his passport. Look clipping of the passport.
Its maximum bandwidth coefficient is 2.38 m3 / hour. If we put the Grundfos UPS 25 60 pump, then at the third speed with this coefficient this node is able to “drain” the load of 17000 W or 17 kW.
Imagine that we have a house in which there is any (unknown) premises of 12 m2 of the useful area of the warm floor in each room. Pipes we are laid in 20 cm increments, which leads to the length of each contour, taking into account the length of the pipes from the warm floor to the collector, 86 m. In agreement with the design calculations, we also obtained that the heat unit from each M2 of this warm floor gives 80 W, which leads us to the thermal load of each contour
In practice, in most cases it is not necessary to make calculation for maximum indicators. Therefore, we will dwell on the figure 15.
In large rooms, the design of a warm floor should be divided into smaller areas and make several contours.
- The limitation of the length of the pipe pipe is necessary not to obtain the effect of the “locked loop”, in which the circulation of the coolant will not circulate through it;
- Proper work of the cement plug-in plate, which should not exceed 30 m2. The ratio of lengths of its parties should be 1/2 and the length of one of the edges should not exceed 8 m.
In order to understand how much of the hinges of the warm floor is needed and on the basis of this, select a suitable collector with the same number of outputs, you need to repel from the area of the rooms themselves, in which this system is planned.
After that, you calculate the useful area of the warm floor. How to do this is described in 12 questions “How to calculate the useful area of a warm floor? “.
Calculation of pipes using formulas
To determine how much pipes need a warm floor, you must first calculate:
- area of residential room or other premises that need to be used;
- Comfortable room temperature;
- used pipes differing in the material from which they are made;
- Pipe laying method;
- Distance between the edges of the floor.
Calculation of the area and temperature of the room
To determine the area where it is required to distribute the pipes, you need to use the formula
When calculating the area, it must be borne in mind that:
- The parameter is calculated taking into account the final finishing of the room. If we carry out the calculation without taking into account the finish, it is possible to allow errors that can lead to incorrect drafting of the project and externally monetary costs for the acquisition of materials;
An example of calculating the receipt parameter
- The resulting value is required to reduce the area occupied by large furniture, since under heavy furniture it is impossible to lay water pipes;
- From the walls required to retreat at least 20 cm. This distance is required for laying a damper tape designed to smooth the extension of the sexual screed when heated.
The calculation of the length of the pipe for the heating floor is also carried out on the basis of the average room temperature, which is considered the most comfortable for living.
The most comfortable temperature regime in different rooms
Selection of pipes
The length of the pipe for the warm floor depends on the material used for the manufacture of pipes. For sex can be applied:
, Different with low thermal conductivity and low cost. In the manufacture of floors from these pipes, it is necessary to reduce the installation step, which leads to an increase in the number of pipes;
The most expensive floor pipes, characterized by high heat transfer
- Corrugated stainless steel pipes. Show heat transfer slightly less than the copper pipes, but remains at a fairly high level. The use of corrugated pipes contributes to an increase in the distance between the edges of the floor, which leads to a decrease in the number of necessary material. The advantage of this type of pipes is also the flexibility of the material affecting the strength and durability of the finished design.
Pipes having high heat transfer and low cost
For warm floors, experts recommend using corrugated pipes, since with a fairly high heat transfer coefficient that promotes the reduction of the required amount of materials, the pipes are different and affordable.
Methods of laying floor pipes
How many meters of pipe is needed on a warm floor? The following indicator on which the number of pipes depends is the laying method.
- Snakes (form laying corresponds to an elongated sinusoid);
- dual snake (pipes are laid in the form of sinusoids. Each bending consists of two pipes smoothing the temperature differences);
- Snails (Spirals).
The most common floor laying methods
Laying of materials in the form of “snake” is optimally suitable for small rooms. This is due to the fact that when using 70 M pipes, the temperature difference at the inlet and outlet is approximately 10ºС, which leads to uneven heating of the floor.
“Double snake” or “snail” helps to achieve the same floor temperature over the entire area of the room.
When choosing a pipeline laying method, you should also calculate the number of closed contours. The maximum length of the pipe loop loop is determined by specialists and is:
- For pipes made of metal plastic and having a diameter of 16 mm, the contour length is 100 m;
- For metal-plastic pipes having a diameter of 20 mm, the circuit must be 120 m;
- for copper and corrugated pipes. 80-90 m.
To achieve greater uniformity of the heating of the floor, the maximum outline is recommended to be reduced by 15-20 m.
Determination of laying step
The laying step is the distance between the pipeline turns, which is the base of the floor.
Distribution of pipes taking into account laying step
- material that is used for the manufacture of pipes;
- Road area. Near the external walls, doors and windows it is recommended to reduce the distance between the turns.
The minimum step of the gasket is determined at 10 cm, and the maximum. 30 cm. When using a larger step laying, the floor will warm up uneven.
The effect of the loop step on the required number of pipes
The flow rate of the heap floor on 1 m2, depending on the distance between adjacent pipes, is presented in the table.
Final calculation of the number of pipes
How to calculate the pipe length for a warm floor, based on the parameters considered? To calculate, it is necessary to use the formula:
Calculation of warm water floors
For a safe setting of a warm floor, you need to prepare all the necessary materials in advance, plan the procedure for work. At the preliminary stage, the most difficult issues will be such as: “Pipe consumption for a warm floor”, as well as the purchase of necessary components. Let’s see what we need to calculate the diameter of the warm floor pipe, as well as let’s see what the best pipes for a warm floor.
So, first, if the room is planned to install overtook furniture or technology, then it is impossible to install pipes. Accordingly, the area is reduced. In addition, it is necessary to retreat from the wall at least 200 mm. this must be considered when calculating the total area of the warm floor.
Secondly, the question of which pipes for the warm sex are suitable for you more or less, you need to solve with a specialist who necessarily recommends the necessary pipe for your room, and maybe it will advise where to buy it, a pipe for a warm floor, it happens completely different. It can be metal-plastic, copper, polypropylene, etc. The most important thing when calculating the number of pipes is a laying step. The more you need room temperature, the less you need to do this step.
In turn, we are extremely advisable to use polypropylene pipes (PP) for a warm floor device. Since the route will have joints, the pipe has a low thermal conductivity and is not intended for a warm floor device, but we are familiar with many examples when the water floor was performed by this pipe. The optimal version is metal plastic or single-layer PEX and PERT pipes.
Warm floor pipe flow when mounting
And finally, thirdly, the laying of pipes of the warm floor should occur strictly according to the scheme, and the length of each contour should not exceed 70 meters. If it is still necessary to exceed this limit, you need to use the following contour, but not to continue the contour, which has already reached this limit, especially using various connecting fittings, thanks to which the probability of leakage increases during operation.