An electric boiler compared to central heating using solid fuels is a convenient solution in the winter season. Therefore, electric heating is usually selected by people who do not have the time to prepare fuel for the heating season or have no place to store it.
Electric boilers also have ecological values thanks to such a supply during the heating no flue gases are emitted.
Considering the construction and purpose of an electric boiler, one or two functions are distinguished. The basic element is a heater covered with a special insulation protecting against water. The heater will start heating only when such demand appears. The greater the power of the electric central heating furnace, the greater the number of heaters installed in it. Electric boilers installed in houses have heating power ranging from 4 to 24kW, there are also electric boilers with much higher powers, then they require three-phase power supply.
Electric heating with a capacity of about 20kW is most effective in medium-sized buildings. Having a house or a building with an area larger than 250m2, we should mount a central heating boiler with a much higher power.
Electric boilers can be the main source of thermal energy, but they can also complement another type of heating, eg boilers fed with solid fuels
Single-function electric boiler is designed only for heating water that circulates in the heating system. In this way, each room in which the installation is distributed is heated. The dimensions of such a boiler are small, usually mounted in a hanging position on the wall.
The double-function electric boiler is used both for space heating and for heating utility water. Most often, the boiler is additionally equipped with a hot water tank. Cold water collects at the bottom of the tank, which circulates between the radiators and the storage tank. The heated water is distributed with the help of the boiler to the radiators as well as to the hot water tank.
When considering the purchase of an electric furnace, we must take into account the profitability of such a system, the costs associated with such heating are influenced by many factors such as:
Building insulation – the CH electric boiler will have the highest efficiency in energy-saving buildings.
The area which will be heated – the bigger the higher costs and the boilers should have higher power.
The temperature we want to get.
Having a building with an area of about 150m2 to be heated, which has a standard insulation, the costs are as follows:
Electric heating approx. 7200 PLN / year
Heating supplied with coal about 2000-2700 PLN / year
Heating with alternating gas about 3500-4000 PLN / year