Electric water heaters: classification of equipment according to various parameters Best manufacturers
Which of us did not encounter interruptions in hot water supply? Things are even worse in a country or village area, where only cold water often flows in the tap. Electric water heaters, which are presented in a wide range and in various price categories, will help to solve the problem.
The main types of such devices, their design features and the best manufacturers will be discussed in our article.
What are household water heaters and how they differ
Water heaters can be divided into electric and gas. Depending on what energy the water is produced.
Also, all devices are divided into 2 types. Cumulative and flowing. A special design of boilers is distinguished in a separate category, which are connected directly to the heating boiler.
Water heaters can be electric and gas.
Type of heating element
In electric water heaters, water heating is carried out using heating elements that differ in terms of operation. They are dry and wet. The former do not contact water and are in a special flask that prevents the formation of scale and reduces the risk of current damage. Dry Tenes last longer, but their main drawback is the high cost.
A wet type is in contact with water. Such water heaters are cheaper, but due to contact with the liquid, scale is formed. It slows down water and leads to the failure of the heating element. Ten should be cleaned of scale every 6-12 months, provided that the boiler is constant to use.
The metal of the tank is subjected to electrochemical corrosion. To extend the service life of the heater, a magnesium or titanium rod is installed in the water heaters. It is necessary to periodically replace the magnesium anode, because it is consumed during operation. How quickly this happens depends on the stiffness of the water. Replacing the part may be the reason for refusing warranty service. If you do not install a new rod, you will have to clean the tank more often.
The principle of operation of the Ten for an electric water heater.
Not one, but several heating elements connected in parallel or cascade, are sometimes located inside.
The presence of several heating elements allows you to adjust the rate of water heating and the load on the network.
Differences by type of energy source
For household purposes, gas or electric water heaters are used. Constructively, they are almost the same, differing only in the way of heating the heat exchanger.
Each option has its own positive and negative aspects, which must be taken into account when choosing the type of equipment.
The main advantage of the storage water heater is the presence of a large volume prepared for the use of hot water
In most cases, storage water heaters are used paired with single.Circuit boilers, less often with double.Circuit boilers
The accumulative heater with low energy costs heats water to a temperature of 50. 85º C and supports this degree until the water consumption
Structurally accumulative water heaters are two concentric tanks, between the walls of which the insulation is located
The water required for temperature users is preserved due to the high insulation qualities of the insulation. The outer tank is made of carbon steel alloy, the structure is covered with a shock.Resistant polymer
The capacity of the internal tank of the accumulative water heater should accommodate as many thieves as required according to the norms, taking into account the number of family members
Equipment connection schemes do not depend on the brand and type. A pipe supplying cold water is connected in the lower part of the device, a pipe supplying heated water to the consumer is located at the top
To solve various kinds of problems, the houses are equipped with both a running device for fast heating and the drive for the preparation of a large volume of water. Instead, the tandem can use a combined boiler that performs both functions
The specifics of gas equipment
Gas storage water heaters use natural or liquefied gas as an energy source for heating. The volume of the tank in such devices is at least 50 liters.
The main difference between them is the design of the combustion chamber:
- An open chamber takes oxygen from the room in which the water heating device is installed. The removal of combustion products occurs through the chimney.
- A closed camera produces an external air fence and removal of combustion products using a pump through a special pipes system.
Despite the fact that water heaters with an open camera are cheaper, the factor of the lack of need for ventilation makes closed devices more attractive for consumers.
To install gas equipment with an open combustion chamber, a room with ventilation, the presence of a chimney and strict adherence to safety regulations are necessary
The installation of a water heater with any type of combustion chamber requires coordination with the gas service. Given that such equipment is potentially dangerous, the corresponding certificate must be issued for it, and for its installation and further maintenance it is necessary to attract specialists.
There are also special requirements for smoke remodes.
Comparison of electric and gas water heaters
Electric storage water heaters have a water tank volume from 10 liters.
They are more common than their gas counterparts, for the following reasons:
- The lower cost of both the equipment itself and its installation;
- Simplicity of installation. There is no need to coordinate installation and conduct service with the mandatory involvement of certified gas services;
- Choice of installation site. There are no restrictions on the location of the unit;
- Safety-electrical devices due to the lack of need for gas are less dangerous.
However, gas water heaters also have their advantages, due to which it occupies its own segment of the market of storage water heaters:
- The lower cost of gas, as source of energy, which, with significant volumes of hot water consumed, quickly pays for the cost of equipment;
- High power and, as a result, is a faster heating of water;
- Lack of loads on the mains. There are no special requirements for wiring.
The choice between gas and electric water heaters depends on many factors, primarily the structure of the house, the number of living people, laid communications and financial capabilities.
An example of calculating the costs of providing individual housing with hot water (excluding service). Expensive gas equipment due to a significantly lower price of the energy source pays for itself after 2 years
How to choose an electric storage water heater
Hot water supply has become the norm in a modern house. In large cities, the supply of hot water is carried out centrally, while in the province of Luda they either never heard, or have already forgotten. Even where there is a centralized DHW during the period of preventive work, water can be disconnected for a period of several days to several months.
To create comfortable conditions and do not depend on this factor, you need to install a water heater. In this article, we will consider the criteria for choosing and the device of a storage water heater.
Water heaters are in source of energy:
Protect. For example, a gas column or an electric flow heater. Water heats up in them when it flows along the heat exchanger.
Accumulative. For example, a boiler, he is a water heating tank. In them, a certain volume of water is heated gradually. Heating time depends on the power of heating elements, the volume of the tank, as well as the quality of thermal insulation. Consider them in more detail.
Accumulative water heaters
The accumulative heaters are called heating tanks or boilers. Are electric and gas, as well as direct and indirect heating. Direct heating involves the location of the heating element (heating) inside the tank, it gives heat directly to the water.
While the indirect heating boiler receives heat from the built.In radiator, according to which the coolant from another heating device flows, for example, a boiler, solar collectors and other things.
In everyday life, electric water heating tanks of direct heating are most widely used. How arranged? Boilers consist of:
Heating element (in this case, wet or dry Ten).
In fact, during repair it is possible to replace only the heater, its sealing parts and water supply seals (elastic bands).
The principle of operation is as follows:
Water is typed through the input pipe into a storage water heater and is in demand in it. Heating occurs using the heating element and is controlled by a thermostat to avoid boiling, due to which high steam pressure will violate the integrity of the capacity. When you open water. She enters the hot water pipeline. At the same time, the pressure of hot water cannot create in the tank in itself, it is provided by the pressure of cold water at the entrance to the drive.
As a result, when you use hot water, its pressure and temperature is maintained until heated water is enough for this. When cold water dilutes hot stocks. I need to give time to warm up again.
What are and which one to buy
Consider the main characteristics of water heaters to form an idea of the selection criteria. Among them:
Accumulatory water heaters, or boilers are produced in different volumes of 10 liters to 200 or more. The greatest demand in houses and apartments is used models of volumes from 80 to 100 sometimes 150 liters. While 10-20 liter models are often installed in the country, because this is enough to wash your hands or some dishes. And 200 liter models install large families in houses.
The larger the volume of the drive water heater. It is more expensive.
Types of heating elements
Tenas also differ. In cheap tanning models, manufacturers install the so.Called (wet) heating elements, and in expensive. (Dry) or air heater. What is the difference?
Tenas are called wet because they are located right in the water. This gives good heat transfer, but dangerous are possible with the risk of electric shock. The fact is that in the process of wear, a malfunction associated with the burning of his spiral is not the only. Ten can not only burn, but also pierce on the case. Look. Why are heater burning on water heater and washing machines and how to replace them.
In the photo you see a wet heater with a magnesium anode. It is needed in order to extend the life of Baku and slow down its oxidation (rust). The magnesium anode is destroyed by itself. It is replaced, if it is not replaced in time, then the metal metal will begin to collapse.
A breakdown on the case occurs when the tube under the influence of scrap and corrosion is gradually destroyed, then the spiral can remain intact and even continue to heat the water, but electric potential will appear in the water, and when you lower the hand under the stream of hot water. You will hit the current.
To prevent this, you can install a water filter at the inlet to the tank, to reduce its stiffness, and also if it is possible to use substances to remove the scale, but this can be done if you remove the tank and pour this composition there, and then turn it on in the work for which.The time. These are certain time costs and requires basic plumbing skills.
To reduce the risk of electric shock, all the metal parts of the bath and the tank must be grounded, and the heater itself must be connected through the RCD. On some models of the RCD is installed directly on the supply wire from the factory.
The service life of the heater is less than that of dry;
The danger of electric shock.
Installing a Tankless Electric Water Heater. Rheem RTEX 240v 13kw in My House
In models (more expensive), dry hets are installed. They are located not in the water, but in a flask, which in turn is installed in the water. So the heating element warms the flask itself, and it gives heat to the water.
There can be two heater in the storage water heater, one usually works one, and the second turns on forcibly. This function is called differently, usually the type of Turbo or Express.
Conclusions and useful videos
To conduct a visual comparative analysis of water heating devices, study video materials with the recommendations of masters for the selection and installation of equipment.
As you can see, there is no unequivocal answer to the question of what is better for home. A cumulative or flowing heater, because each device has its own characteristics and nuances.
But if you cannot decide for yourself, consult with plumbers who specialize in the installation of water heaters and installation of water systems. They will tell you which option will become a “golden middle” for your home or apartment.
And what type of water heater did you prefer to install in your house/apartment? Tell us what your choice is justified, share with your own arguments site visitors. Please write Комментарии и мнения владельцев in the block below, ask questions, publish a photo of the article.
Which accumulative water heater to choose for the apartment. 5 main factors.
What is the best option for choosing a water heater for a home or apartment, this issue faces each of us when repairing or entering a new home.
The stores have a very rich selection of models and manufacturers. Thermex, Ariston, Gorenje, Electrolux. How not to make a mistake in such a variety that can easily lead to a waste of extra money, and then to a second trip after another purchase.
In fact, the choice is not so great. There are two main types of water heaters:
In the suppuration, the water heats up very quickly, it is enough to go through a heating element. It seems that you still need?
However, such heating implies a sharp decrease in the maximum possible pressure.
If you want to get a more powerful stream, in this case you will have to use a more powerful heating element from 8 kW to 30 kW!
How an Electric Water Heater Works
In storage water heaters, the change in the pressure practically does not occur. What’s at the entrance, then at the exit.
Thanks to this, this type can simultaneously provide several points in the house with hot water supply. But this is when using the water heater of the corresponding volume (100-150-200L).
And their choice of volume is quite extensive. From 5 to 300 liters.
First of all, remember that the boiler can only be hung on the supporting wall in order to be able to securely fix it.
Even empty, small in volume models weigh 15-20 kg. And if the container filled with boiling water breaks off the mounts, the consequences will be sad.
How to choose the right liter and how much to buy a boiler, depending on the number of family members living in the house? Here are the main recommendations:
This option is also acceptable for pensioners or when you intend to use the water heater only in the kitchen.
In general, if there are young children in the family, the optimal volume is at least 100 liters. Never take less.
At the same time, it is extremely desirable to install the filter in front of the boiler for water purification.
They are usually designed to clean 15,000 liters of water.
That is, if the volume of the boiler is 80-100 liters, then the replaced cartridge will need to be changed 2 times a year.
With this volume, first of all, think about high.Quality fasteners and the bearing capacity of the wall. In a country house for 200l or more, it is better to choose floor models with legs.
Many are not guessed, but the shape of the tank also greatly affects the working conditions of the boiler. On the one hand, flat, so.Called SLIM models, occupy less space and have more design options.
However, they have large heat loss than in cylindrical tanks. In addition, they heat up slower.
Therefore, if the form is not so important for you, it is better to choose a cylindrical. True, do not forget that it will bulge 40-50 cm from the wall.
Another of the distinctive features of accumulative water heaters is the tank. It can be made of 3 main types of material:
The main advantage of plastic tanks is no chemical interaction with water. This means that the oxidation and corrosion of the walls should not occur.
The main drawback is fragility. In most cases, such a boiler is not suitable for hanging the wall. It is better to install it in any niche.
If the tank is made of high.Quality stainless steel, with a large mroma (more than 30%), and the wall thickness will be the same as that of the tank with enamel, its cost will be prohibitive.
Which heater is still better: flowing or cumulative?
You cannot definitely answer this question. Each type of heaters is good in its own way, it can come in handy in a certain situation. The final comparison of the points looks like this:
- Water performance. In the drill tank, the water ends sooner or later and you need to wait again until the liquid heats up. The second type of heaters will allow you to use as much hot water as you need.
- Power. The requirements of running devices can reach twenty kilowatts, while cumulative boilers are limited to two kilowatts.
- Power usage. The flow heaters are more economical than accumulative. The former spend electricity only on water heating, and the latter. In addition to maintaining high temperature in the container.
- Dimensions. Accumulative devices take up a lot of space. To carefully enter them into space, you need dexterity. Electric running systems. Compact and easily covered with decor elements. Gas speakers, unfortunately, are more awkward in size, it is more difficult for them to find the optimal position.
- Installation and connection. Drill boilers do not require effort to install with the exception of power. It is more complicated with flowing ones: for an electrical device, it will be necessary to strengthen the wiring, and for a gas. Look for a qualified specialist and get permits of permits.
- Price. Buying a running water heater will cost several times cheaper than a similar accumulative. The service of such a system will also be cheaper, since the prevention of running equipment is needed much less often.
In the case when a lot of hot water is required, the combination of two types of heaters is an ideal solution. There are two options for such a layout:
- The flow device is installed for the shower, the accumulative. For household needs and the adoption of the bath. This option is possible if the home power grid is powerful. As a result, there is always hot water in order to wash itself quickly, the supply tank does not empty at the most inopportune moment. At the same time, it becomes possible to buy a smaller tank, and then conveniently place it in the apartment.
- When the kitchen is away from the bathroom, you can install a cumulative unit in the bathroom and a flowing. Under the sink in the kitchen. Even with low wiring power, this option is easily implemented, because for a kitchen crane there is a fairly low.Power device.
In other situations, the solution is more unambiguous. If there is no way to strengthen the standard wiring, and there is no hot water supply in the apartment, it is worth installing a floor heater with a large accumulative capacity. In country houses and cottages, where people occasionally come to relax, it is better to use running small power systems that work from a socket. This is safer, since you do not have to devastate the storage tank in the fall and monitor its tightness. It is worth abandoning gas columns. Modern electric heaters are much safer and do not require coordination with state bodies.
The final conclusion is simple: for constant use by the favorite, the accumulative water heater is, for irregular heating of a small amount of water. A flow.
The main thing is not to forget about the rules of operation and care for equipment in order to get maximum benefit from it and a minimum of negative impressions.