How much electricity does a warm floor consume

Before you decide to lay such a heating system in the house, fully consider the profitability of its use in comparison with alternative heating options. Next, we will look at how to calculate the energy consumption of a warm floor ourselves and tell you how much the film coating, thermomat, and heating cable consume.

Power of heating elements

The main types of electric underfloor heating is a film (infrared), a thermomat and a heating cable. As for the film coating, it is customary to use it when laying the system under the laminate and linoleum, mats and cable are used to heat the floor from ceramic tiles. Each of the listed heating elements has its own characteristics: power, thickness, heating temperature, etc. Now we will consider how much electricity each floor heating consumes.Saving money at home

So, the energy consumption of the heating elements is as follows:

  • film coating - from 150 to 400 watts / m2;
  • heating cable - from 10 to 60 W / meter (an average of 30 watts). Usually, about 5 turns of material are laid on 1 square meter of surface, so that the total power is 120-150 W / m2;
  • thermomat - from 120 to 200 W / m2 (taken average consumption by characteristics floor heating manufacturers DEVI and TEPLOLUX).

The main types of heating materials

As you can see, the power of an electric floor heating is on average from 120 to 200 watts / m2, which allows you to make a system for complete heating of the room, and for auxiliary.

Video review of how much the heating system consumes

Costing technology

To independently determine how much an electric heat-insulated floor takes energy, you must use the following formula:

W = S * P * 0.4,


  • S is the area of ​​the room;
  • P is the system power;
  • 0.4 - coefficient taking into account how much floor surface in the room is covered with cable / film. In other words, 0.4 * S is the effective heating area.
Useful heating area

Useful heating area

So, for example, if you decide to calculate the energy consumption of an electric floor heating with a power of 150 W / m2 in the living room with an area of ​​25 m2, the formula will look like:

W = 25 * 150 * 0.4 = 1500 W, which means consumption of 1.5 kW per hour.

Hourly consumption is known, but there is more to come. As a rule, the heating system works 8-9 hours a day, when all residents are at home. Total daily electricity costs will be approximately 12-13.5 kilowatts. With simple calculations, you can determine that the monthly consumption of a warm floor will be about 360-400 kW.

Meter reading

Immediately draw your attention to the fact that these calculations are very rough and, as a rule, the actual consumption is 2 times less. This is due to the fact that you can additionally use thermostats, which reduce energy consumption by another 40%. In total, the system will consume not 360 kW per month, but 216, in addition, for example, we chose a power of 150 W, and you can use a cable with a characteristic of 90-120 W / m2, which may also be enough in individual conditions!

The last thing you need to do is to multiply the power that the system consumes per month by the cost of one kilowatt of energy in your city. Total, you get the finished energy consumption of the system, on the basis of which you can make an analysis of whether such heating is beneficial or not. As you can see, the calculation formula is quite simple. Using this technology, you can easily calculate the energy consumption of a warm floor in any room: bedroom, kitchen, bathroom and even on the balcony, the main thing is to have a calculator on hand!

I would also like to note that for heating a house with infrared film material, the calculation of electricity consumption is based on the fact that 1 square meter of an unheated room requires about 60 watts of material power. For a heated room, this value is reduced to 20-30 watts. This is due to the fact that the film has a high efficiency and low power consumption, which is, in principle, advantage of infrared heaters any type!

How to reduce costs

Above, you saw how much electricity a warm floor consumes. If you calculate for all rooms, then a decent amount of “for light” at the end of the month will come out. Of course, when paying for the first receipt, you will think about how you can reduce consumption and make the heating system economical.

So, to your attention, tips that will significantly reduce electricity consumption by underfloor heating in the house:

  1. Take care of quality insulation at home. It was experimentally determined that good thermal insulation reduces energy consumption by 35-40%, and this is almost half!
  2. Be sure to install the thermostat on the wall at the coldest point of the room. Thus, the heating will turn on when the temperature drops below the set point and vice versa - turn off when the room is sufficiently heated. Temperature controllers, as we have said, can reduce up to 40% of electricity consumed.Temperature control with a controller
  3. Install a multi-tariff electricity meter in the house, at which the electricity tariff at night is 1.5-2 times less (depending on the region). Anyway, an electric heated floor will work in your presence, and this is just in the evening when you come home from work. So why pay more? About the most important advantages and disadvantages of dual tariff electricity meters we told you, while providing customer reviews.
  4. Only lay the material over the usable area. It is not necessary to mount under furniture and household appliances, this is not advisable from the point of view of reducing consumption and is also prohibited by the manufacturers of heating materials.
  5. You can sacrifice a little heating by lowering the temperature in the room by only 1 degree. An insignificant donation allows you to reduce the energy consumption of an electric floor heating by as much as 5%!

That's all I wanted to tell you about this issue. Now you know how much electricity such a heating system spends, and how to independently reduce the energy consumption of underfloor heating!

We advise you to study:

Video review of how much the heating system consumes

(34 votes)


  • Serik

    I’m building a 40 sq. Floor 1 floor and 30 kV 2 floor bath

    To answer
  • Serik

    How many kV m do you need to install floor heating

    To answer
  • Ivan

    Consumption is not measured in watts, and not in kilowatts, but in kilowatt hours. If the power consumption of the underfloor heating is 1.5 kW and there was continuous operation for 1 hour, then the consumption will be 1.5 kW * h., And if during the day, it will be 36 kW * h. Consumption depends not only on power, but also on time.

    To answer
  • Alexander

    -1 degrees and 5% savings this is a difference of 20 degrees. In the house +20 on the street 0. And if on the street -20 then the savings from -1 degrees are only 2.5%.

    To answer
  • Valery

    how to calculate the cable length for the required area

    To answer
  • Vasya

    The two-tariff meter works at night (usually after zero hours - when everyone is sleeping and the floor is not needed ... unless you are going to heat the apartment), and not in the evening ...

    To answer

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