The demand for electric heating boilers is very high, despite high electricity tariffs. To choose correctly, you should study many factors.
Calculation of boiler power
The device is chosen depending on the area of \u200b\u200bthe heated room. It is conventionally believed that heated 1 square. M of placing with a ceiling height of 3 m is consumed 1 kW. If you wish to buy a double-circuit boiler, increase the power by 25 percent. The power supply is necessarily needed due to a possible reduced voltage on the network, it is also desirable that the device does not work constantly at maximum power. The boiler with a capacity of up to 6 kW is connected to an ordinary wiring designed for 220 W. More powerful boilers are connected to a three-phase system. The maximum area that electric boilers are capable of heat - 200 square meters. m.
Power control options
The cost-effectiveness of the boiler affects the power adjustment methods - stepped or smooth:
- Step adjustment have products with several independent heating elements. The change in the water temperature occurs when the Tan of different power is turned on. Usually in 3-tan boilers, one is 50% of the maximum power and 2 to 25%. You can set 4 power options - 25, 50, 75, 100. But 65% of the power cannot be exposed. Step adjustment is equipped with domestic devices.
- Smooth adjustment provides an alternating resistor that allows you to set any power. Such a boiler is more economical, because Allows heating water to a predetermined temperature, not expendable electricity to heating excess water, as with a stepped system. Smooth adjustment is used in imported devices.
Equipment of devices
Choose products in which all aggregates have already been mounted - safety valve, fine cleaning filter, circulation pump, expansion tank. The device without these nodes will cost cheaper, but they will have to additionally acquire and install, and the cost will be higher than the cost of the assembled model.
To install, no resolution of utilities is required, you can mount in any room.
Automation to control the boiler
To achieve maximum efficiency correctly select the power automation:
- Mechanical automation is designed to work with the simplest devices - thermal relays, contactors of different values. Do not allow accurately adjust the temperature, but the price is low. Machine boilers are installed in non-residential premises.
- Electronic thermostators with digital control saving up to 20% heat. They automatically adjust the operation of all system systems - heating elements, ventilation, sanitary water, depending on the parameters of the room (temperature, humidity and in advance of the time). The boiler will maintain the temperature set on the thermostat.
- In stores sell remote sensors and built-in. The first option is preferable - easier is installed.
Benefits of the boiler with a circulation pump
Built in the boiler system Pump with forced circulation gives the following advantages:
- The efficiency increases, the time for heating the room is reduced, electricity consumption decreases.
- In mansions, a pump with a wet rotor is installed. According to such a scheme, the rotor is washed by pumped water, does not need a cooling fan for the motor.
- Pump with automatic adjustment is preferable to manual control pump. It works quietly, quickly responds to automation signals.
The choice of an electric boiler for heating at home under conditions of a constant increase in electrical tariffs requires a thorough analysis of the set of factors.
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