The main types of electric floors
To determine the power consumption of a warm floor, you should consider the base power of each type of material used during installation. The most common types are:
For thin flooring, such as laminate or linoleum, film heating systems are most often used. For tiles and other hard materials - cable or mats. The film coating consumes the most electricity, the heating cable is the most economical. Thermomats are based on an infrared diaper, so their energy consumption indicators are similar to film ones.
Basic power of heating devices
The electricity consumption of each heating system depends on a set of characteristics:
The manufacturer is obliged to indicate these data on the original packaging of the material, as well as the nominal value of the energy consumed.
Table of power consumption of some models of heating elements per 1 sq. meter:
The cable has a small power, but it is placed in several turns per 1 sq. meter, so that the total power of the warm floor is - 130-150 W per square meter - this is the average.
Calculation of power for underfloor heating
Factors affecting power consumption
The electric floor can be used as an additional space heating system and as the main source of heat. Energy consumption also depends on this direct purpose to a greater extent. If it is planned to heat the room only at the expense of the floor, then the heating elements are used more powerful - up to 200 W per square meter, respectively, and the energy consumption will be large.
But there are other factors that can reduce or increase electricity consumption, these include:
Energy calculation
Suppose that a thermomat with a power of 130 W per 1 meter² is used, then 10 * 130 \u003d 1300 W or 1.3 kW / h is the nominal flow. Further, we assume that the floor is turned on for 8 hours a day, then it turns out - 8 * 1.3 = 10.4 per day, and 10.4 * 30 = 312 kW per month.
The average cost of 1 kW in Russia is 2.5 rubles, so the cost of operating a warm floor will be 780 rubles. This method makes it possible to calculate the maximum energy consumption, without taking into account the use of a thermostat and other factors that affect consumption.
- Technology for calculating costs using a coefficient.
The formula is used for calculation: W=S*P*k, where:
W is power consumption;
S is the area of the room;
P is the power of the heating element;
k - coefficient of usable heating area, according to generally accepted standards, it is 0.4.
Calculation example:
A room with an area of 20 m 2, a thermomat is used, with a power of 130 W per 1 meter², then the formula will look like this:
W \u003d 20 * 130 * 0.4 \u003d 1040 W (1.04 kW).
How different are the actual energy consumption from the nominal?
Of course, the real consumption will be very different from the nominal indicators, since it often happens that there is no one in the house all day and there is no point in turning on the floor, so in reality it will only work for 5 hours. There will also be no need for daily heating, especially in warm autumn, late spring and summer, so the calculated figures will be approximately two times lower.
There are also ways to significantly reduce power consumption, for example, using a thermostat. A good appliance will save up to 30% of the rated power consumption. In practice, it turns out that the electric floor heats up to the set temperature in 5 minutes, then cools down for 10 minutes and turns on again. The heating element works only 20 minutes per hour. If the whole system is turned on 9 hours a day, only 3 hours of electricity are consumed, therefore the costs will look like this:
W \u003d 20 * 130 * 0.4 \u003d 1040 W / h (1.04 kW);
1.5 * 3 \u003d 3.12 - per day;
3.12 * 30 \u003d 93.60 - per month;
93.60 * 2.5 \u003d 234 rubles.
There are several other ways to reduce power consumption:
- insulate walls and windows, eliminate drafts in the room;
- use a "warmer" floor covering, avoid ceramic tiles;
- heating elements do not need to be laid on the entire area of the room, it will be enough to occupy 70%;
- if you lower the air temperature by 1 o C, the consumption will be reduced by 5%, the comfortable temperature in the room is 20–22 o C.
To accurately calculate how much electricity a warm floor consumes, you need to measure the meter readings before turning on and after turning off, of course, all other electrical appliances must be turned off.
Video: What calculations are needed before installing a warm floor
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