Not everyone has access to hot water from central heating . In such a case, users most often choose a boiler. However, it must be remembered that not only the choice of device is important, but also the choice of heater. Today we will tell you how to choose a heater depending on the capacity of the boiler .
What is a boiler heater?
The electric heater is used to heat domestic water. It is undoubtedly an important element of the boiler, but it can also support water heating during the heating season in devices that have a coil and independent water heating. The power of the heater usually ranges from 1.5 kW to 2 kW, although you can find devices with much higher power. The electric heater actually plays a very important role and is used to heat domestic hot water. It will work even when the heat pump is unable to obtain the appropriate amount of heat to heat the water.
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Types of electric heaters
Electric heaters are available in many variants:
- without a thermostat - they are dedicated to modern electric boilers.
- spiral - they have a large heated surface and are very efficient.
- three-phase - operate in three different phases. They are modern and energy-saving. Thanks to three phases, you can regulate the water temperature. They will work well in three-phase electric boilers.
- with thread - easy to install. They are available in 4/3 inch and 5/4 inch variants.
- with a collar - they are distinguished by a different assembly method. The heater is attached to the boiler with screws.
Heater for a 140 l boiler - how to choose?
Heaters should be selected according to the size of the boiler. It is worth paying attention to the power provided for the electrical installation powering the boiler itself. The rule is simple, the larger the capacity of the boiler, the greater the power of the heater should be. For a boiler with a capacity of 140 l, a heater with a power of 1.5 kW is enough . Importantly, it will raise the water temperature by about 10 degrees within an hour.
Heater for a 200 l boiler - which one will work best?
Boilers with a capacity of 200 liters are considered suitable for households with several people. They are particularly suitable for solid fuel boilers. In this case, the coil is powered by heat from the central heating system or an electric heater. An appropriate heater must be selected for this size of boiler. The best solution is an electric heater with a thermoregulator , which is called an electric module. You can choose a straight or curved heater. For such boilers, it is best to choose a model with a power of 2 kW. Many investors wonder whether such a heater consumes a lot of electricity. If the device has a power of 2000 W, it consumes 2 kWh per hour.
Heater for a 300 l boiler - which one to choose?
A properly selected heater ensures efficiency of work, but also allows for quick heating of the water. You need to know that the energy needed to heat water is expressed by the formula: P xt=cw xmx (T2-T1), where:
- P means power expressed in kW
- t is the time expressed in
- cw is the specific heat of water, which is equal to 4.19 kJ/kgK
- m is the mass in kilograms, and in the case of water, the volume in liters
- T2-T1 is the temperature difference in degrees.
A 2 kW or thermostat heater will work for a 300 l boiler 3 kW heater. You should be aware that a larger heater will heat the water faster, but it also consumes more energy, which may translate into higher bills.
How to replace the heater in the boiler?
The heater should be selected according to the size of the boiler. The heater may be wearing out. Fortunately, you don't have to replace the entire device and you can replace just the heater. The work must begin by draining the utility water. The next step is to dismantle the old heater. We also recommend checking whether the magnesium anode or titanium anode are not worn. If they are present, it is also worth replacing them, as they protect the boiler against corrosion. The easiest way is to replace the heater in the boiler, which has a special thread. Then all you need to do is turn the threaded heater with the appropriate power and install a new one. Otherwise, it is best to choose the appropriate collar. It may have holes for direct screwing of the heater. If it does not have them, of course you need to drill them and then screw the heater using appropriately sized screws. You can do such work yourself, which will save you money.
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