The established standards for the surface temperature of underfloor heating
In the Construction Rules and Regulations (SNiP) handbook there are strict rules about what the floor temperature should be. According to paragraph 44-01-2003 maximum and minimum temperature of the heated floor must be in the range of 26 and 35 ° C.
The minimum point of 26 ° C should be set only if the room is permanently occupied by people. If the room is rarely visited by visitors, then the optimum temperature should be at a point of 31 ° C. This value is usually set for bathrooms, swimming pools and toilets, where a comfortable temperature for the feet is most needed. The main limitation is that the temperature along the heating axes should not exceed 35 ° C, a higher temperature will cause unwanted overheating of the system and the floor covering.
For a parquet surface maximum value is 27 ° C. This is due to the peculiarities of the material and its thermal properties, overheating such flooring can lead to deformation.
For a comfortable stay in the room enough 22-24 ° C. This temperature is pleasant for your feet and evenly heats the air in the room. Unlike classic batteries, the air temperature will be maximum over the entire height of the area. In practice, a heating medium value of 30 °C is rarely achieved.
As a rule, all parameters are calculated at the design stage of the heated surface. Before installing water or electric heaters, consider the heat loss of the space and the task they are intended for.
What should be the temperature of a warm floor?
An overheated floor under your feet, at the very least, causes discomfort. If the room is already stuffy, and the heating is running at full power, it begins to give you a headache.
Some doctors also say that too warm a floor is extremely harmful for varicose veins. And is it useful to be in “incubation” conditions all the time, preventing even a little discomfort??
So how to not go to extremes and ensure comfortable but not excessive heat underfoot?
Underfloor heating must be adjusted so that the room does not feel stuffy
Comfortable floor temperature
The maximum floor temperature is governed by the Building Regulations (SNiP). According to them:
- The maximum allowable floor temperature for residential areas is: 26°С.
- For rooms with temporary occupancy: 31°C.
- In children’s (including preschool) establishments: 24°С.
That is, a comfortable floor temperature in the apartment where you live, should not exceed 26 ° C. This is not insignificant, considering that 24°C underfoot already feels like comfortable warmth. For a reason in the description of the floor heating you can often see the maximum number 28 ° C, and the limit, which is allowed on the thermoregulator: 40 ° C (which is more suitable for deicing systems, than for home).
Features of temperature conditions in different systems
In the description of each set of heating system, there is information about what the maximum level to which the floor can be heated. However, you must keep in mind a few more nuances:
- Heating mats, as a rule, have less power than the cable in the screed, so they can not be used for 100% heating of the entire room.
- When choosing a suitable power set it is necessary to take into account the heat loss of the room. For example, the floor on a cold balcony will give off more heat, so a more powerful system is suitable for it.
- In wet rooms, bathrooms, underfloor heating also allows you to get rid of excessive moisture. You can temporarily set a higher temperature here (e.g. 30°).
- Not all floor coverings allow a strong heating. The best choice is a glazed tile. It both cools and heats faster, without deforming.
- The temperature of the floor heating under the laminate and other coatings with low thermal conductivity (parquet, linoleum, carpeting), should not exceed 26 ° C, because due to overheating they can deform (dry out, cracking).
- The maximum power of the heating system for such coatings. no more than 100 W / sq.m. м.
- When buying the coating you need to pay attention to the instructions on the packaging. It should be marked with a sign that says it can be used with underfloor heating.
When choosing a floor heating, pay attention to its wattage and what kind of floor coverings it combines with. So, for example, a powerful heating cable Energy Cable (power 18 watts / n.m) is suitable for laying under tiles also in cold rooms, e.g. on loggias. The Energy Mat (165 W/sq.M) is installed under the tiles in the living space and bathroom, and the Energy Universal cable has a low power of 10 W/p.m, and therefore suitable for all types of floor coverings, including tiling, laminate, parquet, carpeting, etc.
with Energy Cable screed: 36°C with Energy Mat: 28°C, Energy Light Plus: 28°C.
What should be the temperature of the floor heating
Why pay attention to temperature and type of heating element when choosing a floor heating? Not many people know, but the ideal temperature in the apartment is 18-22C, while the most comfortable temperature for the floor is 26-35C. So when buying floor heating you need to consult with your salesperson about temperature ranges. Under different floor coverings are used different types of heating floors. For example a thick heating cable is usually mounted in a screed of 3-5 cm, as the cable heats from 60 to 80 C depending on the heat loss. In this case the screed serves as a radiator. Screed accumulates heat and then gives it back to the room, the same effect from the thin heating cable, but a thin cable is placed in the tile adhesive and the role of accumulator is played by tile.
Infrared film in turn heats up to 40-45 C, but it is mounted directly under the floor covering. In any case you will need a thermostat for underfloor heating which contains a floor temperature sensor. A sensor makes contact with the infrared film and measures and regulates the flooring. Remember! It is pleasant to be in the room only when it is warm and comfortable!
Infrared film heats up to 55C:
Adjusting the temperature of underfloor heating
To create comfortable conditions, as well as to save the consumption of resources, there are special devices to regulate and control the temperature of the floor heating. Types of regulation should be considered within each individual system.
Underfloor heating regulation. Water systems are equipped with thermostatic valves or pump-mixing groups with automatic control. With their use, the possibility of overheating of the flooring is excluded.
In addition, they are able to react to changes in the temperature regime in the room, and to close or open valves to maintain an optimal temperature level.
Regulating infrared and electric floors. To monitor and regulate the temperature, the following devices are provided for such systems:
The complex system includes not only the regulator, but also special sensors that monitor changes in heating mode. For safety, they are equipped with a shutdown function which trips when the system reaches the maximum temperature limit. When the temperature drops, they are turned on again. Such a system is energy efficient, because it allows to save about 40-50% of the consumed resources.
The temperature of underfloor heating under the laminate
Most laminate flooring ranges are designed for installation on warm floors, provided the substrate temperature does not exceed 26°C. Otherwise, the flooring will begin to release formaldehyde in the adhesive.
The temperature of the underfloor heating under the tiles
The temperature of the floor with tiles, as for other floor coverings, should not exceed the comfortable barrier of 30 ° C. Varying the temperature is possible based on the parameters of the room, its heat loss, internal climate.
Comfortable temperature for water underfloor heating
Installing a system of underfloor heating, not enough to take care of the correctness of installation, you must know the temperature gradation. Such knowledge is especially important so as not to damage the final coating: linoleum, laminate or tile. Often users try to set their own parameters, which does not always have a positive impact on the functionality of equipment. Let’s analyze what water temperature is considered standard, low or borderline high.
Warm water floor temperature
The main topics of the page: the temperature of the warm water floor (water and coolant), comfort temperature, working and maximum under the tile, ways to adjust and the sensor.
and more people give preference to the warm floor over traditional heating systems with radiators. This approach has a number of positive points.
Heat is distributed evenly, there are no temperature differences between the floor and ceiling. Significant service life. up to half a century. also contributes to the popularity of installing just such a heating system.
It can be installed in buildings where the heat loss does not exceed the energy loss. Experts say that it is enough if the water temperature for a warm water floor will be 40 ° C.
The temperature of the floor heating under the laminate floor how much to expose
To what temperature to heat the floor heating? What value to indicate on the thermoregulator? What is the maximum temperature? These questions regularly arise from those who are planning to buy floor heating. We answer them in this article.
Permissible temperature values
According to the standards, prescribed in SNIP, the allowable temperature of the floor heating system varies from 26C to 35C. Let’s explain what these values mean.
26С. comfortable temperature for rooms where people are constantly present.
35С. The maximum temperature, it is not recommended to heat any higher. Firstly, it is unpleasant and even dangerous to walk on a scalding hot floor. Second, overheating can cause a system breakdown.
31С. admissible temperature in rooms where people are not constantly present. These rooms can include bathrooms, bathrooms and even swimming pools.
Thermal conductivity of floor coverings
The type of floor covering determines how long the heat is retained in the room. Some materials hold temperature well, but take longer to heat up, while others quickly reach the desired value, but also cool down quickly.
The most optimal material for underfloor heating. The heater is placed in the concrete screed and the ceramic tile is already the final coating. material together with concrete are well heated and keep warm for a long time. This means that the system works at a lower temperature. By the way, porcelain stoneware also keeps the temperature right for a long time.
Popular and affordable material for floors. Laminate has a dense structure, which increases its thermal conductivity. The optimal temperature for this flooring is 27C.
Parquet has low thermal conductivity. The temperature of the underfloor heating should also not exceed the value allowed for laminate, namely 27C. It should be borne in mind that natural wood does not like the excessive heat and will dry out from the constant heat.
These are the most popular floor coverings. If you are planning to place other finishes for the floor, check with experts what kind of floor heating can be used and with what allowable temperature of heating.
I would never have thought that a person’s comfortable temperature is in such a narrow range.
Although we used to live without temperature controllers.
It is believed that at night, during sleep, the temperature should be low.
During the day, when most likely no one is home, too, there is no need to heat up to 22 degrees.
Of course, such desires arise when there is a way to translate them into practice.
The new programmable weekly room thermostats have a factory setting of 16 degrees as the night temperature.
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This must be the custom in China. I can not imagine that in Russia, someone is sitting at 16 degrees, if there is a thermostat with a button “”.
It’s another matter when there’s a child in the house. And when the house has laminate flooring on the screed and no carpets.
I have linoleum in my interior hallway, and no warm flooring, and no carpets. And nothing. No desire to put a carpet. A screed placed on a layer of polystyrene doesn’t cool down much.
But there are other rooms around this room and no one is sitting on the floor in it.
In residential areas, operating laminate on concrete would not be very pleasant.
What you need to calculate?
The calculations will help determine the required capacity of the underfloor heating, as well as help you choose the right boiler and pump. To make a calculation, you need to consider many factors:
- the temperature readings in the region;
- room type;
- the presence of insulation;
- The number and size of windows;
- type of flooring;
- On what floor the room is located;
- Alternative heat sources.
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This allows you to determine the heat loss of the building. You also need to know what is the most comfortable room temperature.
After checking the heat losses, the purpose of the room and deciding on the required floor temperature, the quality and physical characteristics of the floor covering to be used should be assessed.
Dependence of the power of the floor heating on the type of flooring and the thickness of the screed
Here, the main factor will be the resistance of the coating to high temperatures. For example, the tile is not afraid of them, but the parquet can quickly lose its qualities. The temperature of the thermal fluid should be between 30-55 C. In the case of parquet, the temperatures of the cement-sand screed must not be heated above 28ᵒC.
The construction of the underfloor heating consists of several layers:
Flooring (linoleum, parquet, etc.).д.); screed; pipe system; foil film; damping tape; insulation (polystyrene foam).
The heat carrier heats the material surrounding the pipes of the circuits and the insulation keeps the heat given by the carrier by heating the flooring. The entire room is heated in this way.
- Tiles have good heat dissipation and wear resistance. Fluctuations in temperature or humidity do not cause deformation, so it is the most common choice today. Porcelain tiles are high-strength materials with good thermal conductivity, so the floor with this coating heats up 10-35% faster than others. Tile glue is also not afraid of high temperatures and humidity, so the lifetime of the coating is limited only by the reliability of heating elements. You can find a wide variety of designs, the price range is also huge.
- Laminate. It is a material with low rigidity. It is laid on a prepared base screed or plywood substrate. Floor covering made of laminate heats up 15-25 percent slower than that made of tile. Mounting laminate flooring on the concrete screed is performed “floating” method, so high humidity in the room or water spillage will lead to a shift in the flooring pattern. When mounted on plywood laminate is fixed with screws, it increases the strength of the floor and reduces the likelihood of displacement of the pattern with increasing humidity.
- Parquet. Performance and thermal conductive properties of parquet is similar to laminate. Parquet is stronger than laminate, expands under the influence of moisture, so you need to carefully monitor its level in the room. Under the influence of the temperature of 40 degrees the parquet loses moisture and diminishes in size. That’s why you should lay parquet below 8 percent humidity. Otherwise, after a week of use, there will be large gaps between the planks of parquet. To combine a warm floor and parquet, you need a plywood pad thicker than 20 mm, which will increase the cost of heating.
- Linoleum and carpeting Thinner linoleum and carpeting heat transfer properties inferior to tiles, but superior to parquet. To conclude these materials, the screed is poured with mixtures. This option is one of the cheapest.
- Cork flooring. Cork has the lowest thermal conductivity of all the listed materials. Concluding it on a warm floor reduces the heating efficiency by 25-30%.
- Plywood. Laminated and painted plywood is similar to parquet or laminate in its thermal insulation properties. For laying plywood requires a screed that is more than 6 cm thick (for laminate and parquet 3 cm is enough). If plywood is more than 20 mm thick, it is laid directly on wooden or aluminum rails. This method can be used to temporarily cover a warm floor.
- Poured 3D floors. Infused flooring is similar to tile in thermal conductivity. The small thickness, the equal coverage surface, the possibility to apply 3D or conventional patterns make the poured flooring more and more popular for covering the warm floor. High durability, insensitivity to fluctuations in humidity levels provide a service life of up to 20-25 years. The cost of screed flooring is equal to the cost of laying a decorative or artistic parquet.
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The choice of flooring depends on the type of room, for example, in the bases and living rooms of panel houses is better not to use tile, because it is quite “cold” material that will require additional heating.
Minimum and maximum thickness of the screed
The key to a high heat output in the underfloor heating system is the screed. On its thickness, as well as its type, will directly depend on how comfortable will be the operation of a warm floor. Screed affects the uniformity of heat distribution. Pipes with a coolant heats the screed, and then it radiates heat further. Too thick screed will have a high heat capacity, but it will be difficult to regulate the temperature. Thin, too quickly heat up, and if overheated, can adversely affect the floor covering.
In addition, too thin screed can prevent the warm floor from warming evenly, and a thick screed can significantly increase the heating and cooling of the flooring. Because of this, the floor will be too hot in the evening, and in the morning, on the contrary, will be cold.
Recommended by manufacturers of warm floors minimum thickness of 45 mm. But the floor can be uneven, so at certain points in the room is allowed a maximum of 100 mm.
What will happen to the floor if you put too high a temperature on it?
In the instructions to the set of heating system has information about what the maximum level to warm up the floor, because in the case of a fault, it is easy to flood the whole house or damage the flooring.
- when selecting the appropriate capacity, you need to take into account the heat loss of the room, for example, the floor on a cold balcony will give off heat more intensely, so it is suitable for a powerful system;
- In wet rooms (bathrooms), warm floors also allow you to get rid of excess moisture, so you can occasionally set a high temperature of 30 C;
- not all flooring can withstand a lot of heat. The exception is glazed tiles, which cools and heats faster, and at the same time is not deformed;
- the temperature of the warm floor under the laminate or other coatings with low thermal conductivity (parquet, linoleum, carpeting) should not exceed 26 C, because due to overheating they can deform (dry out, crack);
- The maximum power of the heating system with low thermal conductivity coating should not exceed 100 W / sq. m;
- Buying flooring you need to pay attention to the marking there should be a sign that allows its use with underfloor heating.
An overheated floor also causes discomfort for residents. If the room is stuffy and the heating is running at full power, you will get a headache. Doctors warn that too warm floors are bad for varicose veins.
The consequences of incorrect calculations
The wrong step of the pipe is another common mistake. Like the thickness of the screed, in many cases it is calculated by installers arbitrarily, unless they are professional craftsmen. It can be 25 or sometimes 30 or even 40 cm. However, in the construction of the floor heating, the step must be exactly calculated based on the heat loss, the diameter of the pipes, the length of the circuit. Improperly calculated step can get a temperature “zebra” surface of the floor will be heated in strips.