Manufacturers Buyers have to choose a manufacturer of underfloor heating among a wide variety of brands. Electrical systems are produced by both foreign and domestic companies. The cost of underfloor heating depends on its type and the manufacturer that produces it. Davi (Denmark), Nexans (Norway), Ensto (Finland) stand out among foreign companies that are in demand in our country. The products of these brands are of high quality. Each company uses a specific cable manufacturing technology. Moreover, each of these manufacturers produces heating cables and mats. The Finnish company Ensto also produces a thin heating wire (like on mats) without a grid. The cost of such systems will be an order of magnitude lower than that of mats. It is also worth considering that the price of heating systems depends on their length and power. On average, a cable for installation in a screed of foreign production can be purchased at a price of 1500 rubles / m². It is worth considering that the longer the system is purchased by the buyer, the less its cost per square meter. So, for example, the average price of a bay, which is enough to cover 4 m² of floor surface, is (foreign production) about 7 thousand rubles. At the same time, you can purchase a system of 1 m² at a price of 4 thousand rubles. Considering the review of warm floors, you should pay special attention to domestic manufacturers.
Calculation Each company gives its wire a certain power. This indicator is indicated on the packaging of the cable, mat or film. To purchase a sufficient amount of heating wire, you should consider the existing building requirements and calculate the underfloor heating. If an apartment or house has a ceiling height of no more than 2.7 m, you can follow the standard recommendations of the manufacturers. So, for heating rooms with large window openings, you need to purchase a system with a capacity of 180 W / m². If the windows are ordinary, and the heat loss in the room is minimal, you can give preference to the 150 W / m² system. Also on sale are low-power systems 120 W / m². They cannot be used as main heating. They are laid to create a warm zone on the floor in the presence of a different type of heating. For example, it can be the space in front of the sofa (where they constantly step with their feet) or the area under the dining table, etc. Experts say that calculating the warm floor is an important procedure. To do this, it is advisable to call the company's expert home. He will measure heat loss, assess all the nuances of the room and be able to choose the best option for the system. On average, to create autonomous heating using an electric heating system, it will need to cover at least 70% of the room. It should be borne in mind that this type of material is not laid under furniture. Heating cable installation There is a certain method of how to install a warm floor. First you need to develop a floor plan and indicate on it the location of the furniture and the heating element. This is a mandatory requirement of manufacturers. If the furniture has high legs, a warm floor can be installed under it. Such a system must not be installed under solid cabinets, wardrobes. Otherwise, here it will overheat and fail. To mount the heating cable, you will need to prepare the base. It is cleaned of all unnecessary materials. A layer of insulation is laid down (expanded polystyrene at least 3 cm thick). You need to spread waterproofing on it. Next, a reinforcing mesh with 10 × 10 mm cells is mounted. A special tape is laid out on it to fix the wire. The cable is unfolded with a snake. The step between the turns should be 10-12 cm. After that, a strobe is made in the wall to conduct the sensor from the thermostat to the floor. This device will control the heating temperature. A corrugated pipe is laid in the strobe. It should run in the center of one of the turns of the wire. A sensor from a thermostat is inserted into the corrugated pipe. The underfloor heating design does not imply heating level adjustment. This function is performed by a thermostat. The wires from the floor are called with a multimeter. If the resistance readings coincide with the value specified by the manufacturer, they are connected to the thermostat. After that, the system is poured with a 3 cm thick screed. It includes sand, cement, and a plasticizer. The last of the named components is needed so that air pockets do not form in the thickness of the solution. They can disrupt the operation of the wire. When the screed is dry (3-4 weeks), the finishing is mounted. It will be possible to use the floor not earlier than in a month.