One of the options for autonomous heating in the apartment is the floor heating system. This option is very popular today and can be used not only in an apartment building, but also in a country cottage, at the cottage and even in a bathhouse. Before proceeding with the installation of a heating system of this type, it is necessary to correctly calculate its power, so as not to overpay for excess heat and at the same time not make it weakly powerful. On how to correctly calculate the electric warm floor for the capacity and area of the room, we'll talk further!
- Computing technology
- Case study
Computation technology
Immediately it should be noted that today there are services, such as online calculators and programs for calculating the warm floor for individual conditions. Such programs are really very convenient and allow you to immediately determine the exact power of the film coating or the heating cable. If, for some reason, you do not trust computer calculation, we recommend you do everything in the old fashion - using simple formulas.
So, the formula for calculating the electric underfloor heating is as follows:
P = Pm * Scom ,
where:
- Pm is the power of the heating material, which you yourself have to choose( see below), m2;
- Sq.- The useful area of the room.
As you can see, the formula for calculation is far from complicated, but there are two unknowns in it, which you yourself must determine. As for the useful area of the room, everything is simple. Heating mat, cable or film must be stacked only in those places where there will not be household appliances and furniture. First, it is already forbidden by manufacturers, becauseforeign objects on the floor will interfere with heat transfer, resulting in the material overheating. Secondly, what is the point of heating the surface where no one will walk? This is an extra waste of electricity. On the diagram you can see how the useful area of the room for calculating the underfloor electric looks:
Useful area of heating
Calculation of the useful area for laying the electric underfloor heating is done as follows: the width of the surface must be multiplied by the length.
As for the power of the heating material, you must choose it yourself, depending on the type of room. For each room, the power of the infrared film or mat will have its own, which is obvious - the balcony and the corridor need more heating than the bedroom and children's, which are additionally heated by water radiators.
We present to your attention the most optimal values for calculating the power of an electric heated floor:
- Kitchen: 110-130 W / m2;
- Bathroom( bathroom): 120-150 W / m2;
- Balcony: 180 W / m2;
- Entrance hall: 110-120 W / m2;
- Corridor: 110-120 W / m2;
- Living room 110-130 W / m2;
- Bedroom 110-130 W / m2.
We draw your attention to the fact that the above values are suitable if the electric warm floor will be used as an additional heating system. If you decide to use this option as a central heating system, for each room you need to choose a heating material with a power of 140-180 W / m2;
Useful area You are known, power parameters are also selected. It remains only to substitute the values in the formula and make a general calculation of the warm floor of electric power. So that you understand how to calculate this parameter, then we will give an example for one of the rooms.
Case Study
For example, we need to calculate the warm floor for a living room area of 25 m2.Conditionally calculate the useful area of the room. Since in the living room we have a sofa, armchairs, a table and a closet, the useful area will be only 60% of the total.
Scomn = 25 * 0.6 = 15 m2
The next step is to select the power of the conductor, which in our case will be the heating cable. Here, one very important nuance - the cable is sold with a characteristic not W / m2, and W / m. You must independently choose the step of laying the material by 1 square meter. For example, selecting a cable with a parameter of 30 W / m, it should be stacked in steps of 20 cm to get a value of 150 W / m2.Let's return to the calculation, and according to recommendations we take the optimal value for the living room - 110 W / m2( in addition there will be central water heating).
Substitute the values in the formula, then, using the calculator, calculate the power:
P = 15 * 110 = 1650 W
With the calculated value go to the store and buy the suitable size of the heating material. Example calculation works You can also view video:
That's the whole technology of calculating the electric warm floor in terms of capacity and area of the room. This formula is suitable for determining the required power for both laying material under the laminate, and when installing under the tile. We recommend immediately to calculate how much the warm floor consumes in your case to compare with other types of electric heaters. Perhaps, this option will be too expensive for you and a more profitable solution will be the connection of infrared heaters.
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- Calculation of the cable cross-section for current, power, length
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