Not everyone has access to hot water from central heating . In such a case, users most often decide on a boiler. However, it must be remembered that not only the choice of device is important, but also the selection of the 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 utility 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 really does play a very important role and is used to heat utility water. It will work even when the heat pump is unable to obtain the right 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 - have a large heated surface and are very efficient.
- three-phase - they operate in three different phases. They are modern and energy-efficient. Thanks to the three phases, the water temperature can be regulated. They will work well in three-phase electric boilers.
- with thread - are easy to install. They are available in 4/3 inch and 5/4 inch versions.
- with a flange - they are distinguished by a different method of installation. The heater is attached to the boiler with screws.
Heater for 140 l boiler - how to choose?
The heaters should be selected according to the size of the boiler. It is worth paying attention to the power intended 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 140 l boiler, 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 l are considered suitable for households of several people. They are particularly well suited to solid fuel boilers. In this case, the coil is supplied with heat from the central heating system or an electric heater. An appropriate heater should be selected for this size of boiler. An electric heater with a thermoregulator , which is called an electric module, will work best. You can decide on a straight or bent heater. For such boilers, it is best to choose a model with a power of 2 kW. Many investors wonder whether such a heater does not consume a lot of electricity. If the device has a power of 2000 W, it consumes 2 kWh per hour.
Heater for 300 l boiler - which one to choose?
A properly selected heater ensures efficiency, but also allows for quick water heating. It is important to know that the energy needed to heat water is expressed by the formula: P xt=cw xmx (T2-T1), where:
- P is the power expressed in kW
- t is the time expressed in s
- 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.
For a 300 l boiler, a heater with a 2 kW thermostat will work well or 3 kW heater. You need to be aware that a larger heater will heat the water faster, but it also uses more energy, which may translate into higher bills.
How to replace the heating element in the boiler?
The heater should be selected according to the size of the boiler. The heater may wear out. Fortunately, you do not have to replace the entire device and you can replace the heater alone. Start by draining the utility water. In the next step, you should dismantle the old heater. We also recommend checking whether the magnesium anode or titanium anode are worn out. If they are, it is worth replacing them as well, because they protect the boiler from corrosion. The easiest way to replace the heater is in a boiler that has a special thread. Then you only need to turn the heater with a thread of the appropriate power and install a new one. Otherwise, it is best to choose the right collar. It may have holes that are used to screw the heater directly. If it does not have them, you will obviously have to drill them and then screw the heater in using screws of the appropriate size. You can do this work yourself, which will save you money.
Check out heaters for tanks and exchangers at the Onninen wholesaler