- How storage water heaters work
- Device Selection Criteria
- Volume
- Power
- heating element
- Anode
- Fastening and shape
- Anti-corrosion protection
- Control
- Connection
- What parameters to pay attention to when choosing a storage water heater
- Specifications
- TOP 5 models with a tank up to 80 liters
- Ariston ABS VLS EVO PW
- Electrolux EWH 80 Formax
- Gorenje Otg 80 Sl B6
- Thermex Sprint 80 Spr-V
- Timberk SWH FSM3 80 VH
- The main differences between storage and flow devices Electrolux
- Electrolux
- What to look for when choosing
- Connection and service
- Boiler repair
- Overview of storage water heaters from different companies
- Varieties
- The best horizontal storage water heaters
- Zanussi ZWH/S 80 Splendor XP 2.0
- Ariston ABS VLS EVO QH 80
- Zanussi ZWH/S 80 Smalto DL
- Electrolux EWH 80 Centurio IQ 2.0 Silver
- Electrolux EWH 80 Royal Flash Silve
- Useful information
How storage water heaters work
Storage water heaters are either gas or electric. Their principle of operation is similar, the only difference is that in the first version, a gas burner is responsible for heating the water, and in the second, an electric heating element. Gas-type water heaters are practically not popular, usually only electrical appliances can be found on sale.

Electric water heater storage type (boiler) is made on the principle of a thermos. The essence of the work is that cold water fills the tank and is heated with a heating element to a certain temperature, after which the heating element is turned off. The space between the tank and the body of the water heater is filled with a thick layer of insulation, which allows you to keep the high temperature and thus avoid reheating, and therefore reduce electricity costs. In this way, the boiler differs for the better from the instantaneous water heater, which, after switching on, constantly works and consumes electricity all the time. As soon as part of the hot water is drained in the boiler, it is immediately replaced by cold water, and the heating element is turned on again to heat the diluted liquid to the set temperature.
Electric boilers are pressure and non-pressure. Heaters of the first type require constant water pressure, but always provide hot water under good pressure. Non-pressure water heaters are used in cases where water is pumped when needed. These are outdated systems, but they are often bought for summer cottages, where people do not permanently live and therefore do not feel the need to build a full-fledged water supply. In such devices, hot water does not mix with cold water as quickly as in pressure water heaters, but it takes a long time to heat up due to low power.

Pressure water heater

Non-pressure water heater
Device Selection Criteria
When it comes to buying a storage water heater, there are many important things to consider.
The number of residents, the number of water points should be taken into account, and whether additional functions are needed, such as a timer, etc.
Volume
To choose the right amount of water heater, you need to consider the purpose of its purchase. If used only in the kitchen, a device of 10 liters will suffice. To wash dishes and take a shower for one person, you need to buy a 50-liter boiler, and for a family of three, you need a volume of 80-100 liters or more. In small bathrooms, typical for most apartments, it is very difficult to place a large water heater, while for private houses, where there are no problems with free space, you can also purchase a device for 200 liters.

Power
The power of boilers is closely related to the number of heating elements. In small appliances (up to 30 liters), one heating element is used, in devices with a larger capacity, two electric heaters are installed. Electricity consumption also depends on the volume of the water tank.
Devices with two heating elements heat water much faster than similar boilers with the same power, but with one heating element, which means they turn off faster and stop using electricity.
heating element
The standard heating element is made of a copper tube with a nichrome filament running inside that conducts electricity. Such a heating element works when immersed in water, therefore it is called "wet". This electric heater is inexpensive, but scale is constantly formed on it.

More modern are "dry" heating elements. Their heating part is “hidden” in a protective flask, which is in contact with water. Such electric heaters last longer and are considered safer, but their price is much higher.
Anode
To prevent corrosion of the tank and other metal elements, a magnesium anode must be installed in the boiler.It does not allow scale to settle on the heating element and the tank, which protects the insides from rust. Different models are equipped with anodes of different lengths, so their service life is different. After a certain amount of time, these elements must be replaced.

Fastening and shape
When choosing a boiler, you need to consider how it will be placed on the wall - in a horizontal or vertical position. Typically, such water heaters have a vertical mount, but some models provide the possibility of fixing in any plane. The shape of the water heater depends on the type of fastening. Boilers with a vertical mount are cylindrical in shape, and with a universal mount they are flat.
Anti-corrosion protection
The interior surface of the corrosion protection tank can be made from a variety of materials. Commonly used enamel coating, stainless steel, glass ceramic, titanium layer, etc.
Control
The simplest water heaters are equipped with a mechanical temperature controller and thermostats that turn off or turn on the heating element when the water is heated to the required level or cooled down (respectively). More expensive devices use a smart processor that allows you to control the temperature of the water with high accuracy. In addition, it can perform many additional functions, for example, work according to a given schedule, disinfect water, use one or two heating elements, etc. Such boilers have a stylish design and are equipped with an intuitive touch screen, on which it is very easy to make certain changes.

Connection
The choice of the upper or lower connection depends on the installation location of the boiler - if it is placed under the sink, then you need to choose the top connection, but if the water heater is planned to be hung above the sink (bathroom, washing machine, and so on), then you should opt for the bottom connection. It should be borne in mind that the same model may have different connection methods, so when buying it is worth checking this nuance so as not to make a mistake. You can always check the information on the official website of the manufacturer.
What parameters to pay attention to when choosing a storage water heater
In the general top lists, the consumer leaves his opinion about what did not suit him, and which boilers are the best and most reliable. After all, a quality product can not always be bought the first time, based on theoretical knowledge about the characteristics
In order not to overpay, you should pay attention to:
- Required capacity. Usually based on the estimated number of users.
- Location option in space: vertical or horizontal. There is a direct dependence on how much space is in the house, in the area where the unit is located.
- Form Factor Electric storage water heaters reviews the best models necessarily have not only internal design features, but also the appearance of the product, its shape. It can be: a rectangle, a cylinder (it is the cheapest) or slim variations - atypical.
- The body material can be stainless steel or enameled.
- Heating element format - there are both options - dry and wet. At the same time, each takes a place close to the leaders in the rating of storage water heaters.
- Water heating rate, device power.
- Profitability.
- Control methods, display, buttons and more.
- Functionality.
With all this, it is much easier to choose something when there is confidence in the manufacturer of the water heater, reviews, which one is better, based on the reliability of the manufacturer.
Specifications
Electrolux water heaters presented in the assortment have excellent technical characteristics. The country of origin of these units is China. The use of advanced technologies and materials in the form of stainless steel, as well as enamel with a titanium-cobalt alloy, allows products to take their rightful place in the popularity rating. All specimens fully comply with European quality standards, as their constituent elements correspond to the required parameters and harmoniously complement each other.
In the selection process, it is necessary to take into account such features as:
- dimensions;
- temperature control level;
- type and materials of manufacture;
- protection class;
- allowable pressure.

It is worth noting that each Electrolux boiler is made from stainless steel, which allows it to maintain its original qualities throughout the entire period of operation. The presence of high-quality thermal insulation contributes to the long-term preservation of the required water temperature inside the tank. Models with a dry heating element, which are distinguished by improved assembly and ease of use, are widely in demand. Their heating element in the form of a heating element can be made of steel or copper.
The Electrolux electric storage water heater can have a maximum power of up to 2 kW.
The individual operating pressure will directly depend on the type of unit, which include:
- accumulative - up to 7 bar;
- flow - up to 10 bar;
- gas - up to 13 Mbar.
Each Electrolux water heater model is characterized by impeccable quality, functionality, reliability and durability. Due to the many advantages, these devices are subject to active use not only in residential buildings, but also in various public places. The advanced production technology makes these products truly durable and practical, allowing them to be used for many years.
TOP 5 models with a tank up to 80 liters
These models are much more capacious and are in the greatest demand among consumers. Based on customer reviews, we have identified the 5 most popular units, the most balanced according to the "price-quality" criterion.
Ariston ABS VLS EVO PW
If cleanliness and quality of water are especially important to you, then this model will suit you perfectly. There are several systems that provide perfect cleaning. In addition, ABS VLS EVO PW is equipped with the "ECO" function and is able to prepare water at such t C, at which microbes simply have no chance of life.
Pros:
- perfect water purification system;
- ECO mode;
- accelerated heating
- protective automation ABS 2.0, which controls all processes;
- there is a magnesium anode;
- not too high price, from $200.
Customers love the design and functionality. There is enough water for more than three, it heats the water quickly, because there are already two heating elements. The build quality is good. Cons have not yet been identified.
Electrolux EWH 80 Formax
Quite an interesting model from the well-known company "Electrolux" (Sweden). Quite capacious tank with enamel coating, which, in our opinion, only adds to its advantages.The boiler is equipped with a tubular heating element and is capable of heating water up to 75C.
Pros:
- nice design;
- flat tank, which reduces its dimensions;
- equipped with a safety valve;
- dry heater;
- keeps water warm for a long time;
- simple setup;
- 2 independent heating elements;
- together with the boiler there are fastenings (2 anchors).
Buyers love the design, and that it can be mounted horizontally. Looks good - modern and compact. Heats up quickly. Temperature control - a mechanical knob on the body, there is an Eco-mode. The tank heated to the maximum is enough to take a bath. No cons found.
Gorenje Otg 80 Sl B6
This model was named by consumers as one of the best water heaters of 2018-2019. One of the positive qualities of this boiler is that it heats water an order of magnitude faster than other models with similar performance. At the same time, the water is heated to 75C, and the power is only 2 kW.
Pros:
- fast heating;
- profitability;
- good protection (there is a thermostat, check and protective valves);
- the design provides 2 heating elements;
- the inner walls are coated with enamel, which reduces the likelihood of corrosion;
- there is a magnesium anode;
- simple mechanical control;
- price from $185.
Minuses:
- quite a lot of weight, just over 30 kg;
- not too convenient to drain the water;
- The kit does not include a drain hose.
Thermex Sprint 80 Spr-V
This hot water unit also differs in the speed of obtaining hot water. To do this, the "Turbo" mode is provided here, which translates the boiler to maximum power. The water tank has a glass-ceramic coating. Maximum t ° C of hot water - 75 ° C, power 2.5 kW.
Advantages:
- there is a magnesium anti-corrosion anode;
- good protection system;
- compact;
- interesting design.
Flaws:
- during heating, water sometimes drips through the pressure relief valve;
- the price could be lower, from $210.
Timberk SWH FSM3 80 VH
It compares favorably with heaters from other companies in its shape: a “flat” device is much easier to “stick” into small bathrooms and kitchens. It has all the necessary protective functions, and the tank is made of high quality stainless steel. Weight without water 16.8 kg.
Pros:
- tubular heating element 2.5 kW has power adjustment;
- reliability;
- there is an anti-corrosion anode;
- retains heat well;
- fast water heating.
Minuses:
- the power cord heats up slightly;
- cost from $200.
The main differences between storage and flow devices Electrolux
Flowing water heaters. Available in both gas and electric. Here, the water temperature rises to large numbers very quickly, passing through a high power heating element. Such boilers can provide their owners with heated water in large quantities.
Instantaneous water heater
Flowing water heaters are characterized by high power, because the heating speed is important. The range of their work is from 1.5 to 27 kW. Very powerful units require a mains voltage of 380 V.
storage boilers. These water heaters can also be gas or electric. One of the advantages of such boilers is the possibility of simultaneous use of hot water from different taps, for example, in the kitchen and in the bathroom. The water in them is heated gradually and at the same time they consume much less fuel or electricity than their flowing counterparts.
The rate of water heating to the set maximum temperature may vary depending on the model, starting from 20 minutes to 5 hours - the time depends on the power of the heating element.When the temperature reaches the upper limits (55-75°C), it is maintained at the same level using automation. The operating power in storage boilers is 2 kW, which is much less than the needs of their flow-through counterparts.
The temperature of water heating in Electrolux boilers can be set within certain limits:
- in accumulative models - from 30 to 75 ° C;
- in flow - from 30 to 60 ° C;
- in gas columns - from 30 to 60 ° C.
Boiler
Storage water heaters are equipped with polyurethane foam insulation, which does not allow water to cool when disconnected from the mains.
If we evaluate Electrolux water heaters from an ergonomic point of view, then flow models definitely win. They are small in size and weigh a little. In the design of accumulation models there is a rather large water tank with a capacity of up to 200 liters. Although the company also produces compact models, for example, the Genie series of water heaters.
Electrolux

- economical;
- all work processes are fully automated;
- some models are equipped with 2 heating elements of the X-heat type (“dry”: the heating elements do not come into contact with water), for other models, the heating elements are covered with enamel, which becomes elastic and does not crack when heated and cooled;
- the tank is covered with glass enamel inside;
- various sizes of equipment and mounting methods allow you to install in any place.
Take note: Electrolux products with “dry” heating elements are best protected from scale and moisture ingress into the heating element.
Electrolux brand water heaters will fully justify the money spent on their purchase.
What to look for when choosing

Each manufacturer is confident that they produce the best boilers. Agree, it would be strange if the manufacturers did not praise their product. After all, any production requires considerable costs and it would be short-sighted to produce frankly bad products. But among the sound of "praise songs" it is quite difficult for an inexperienced consumer to decide on the list of necessary functions. It can also be difficult to understand what you can save on, and what “goodies” you should still spend money on. Customer reviews will help us understand all these issues, after analyzing which we have compiled a small list of really important selection criteria.
Volume of the tank. The range here is quite large: from 10–15 liters to 300.
The power of the device. The higher this parameter, the faster the boiler heats the water.
But here it is important not to overdo it. You will have to pay the electricity bills.
Type of heating element
Most often it is a heating element or a special spiral. The former are a little more expensive, while the latter often "burn out".
The presence of an anti-corrosion anode in the tank. The presence of such an element allows you to automatically "stick" small internal cracks inside the tank.
The degree of electrical protection. There are specific standards that the instrument must comply with. Your safety depends on this.
When choosing a storage water heater, you should carefully study each of these parameters. So let's take a look at them in a little more detail.
Connection and service
Wiring diagram
The main part of Electrolux boilers is mounted vertically on the wall, but you can also find models with horizontal placement. The letter "H" will be present in their name.The manufacturer also produces universal models that involve both types of installation.
Boiler Electrolux with a volume of 50 liters and above is produced with a lower supply for cold water and a tap for hot. Before installation and operation, it is recommended to carefully study the instructions. It contains all the rules for fastening, connecting safety valves.
The Electrolux heater is sold complete with a bracket on which the tank must be mounted. The kit also includes fasteners.
Boiler repair
Boilers Electrolux have established themselves as reliable equipment. Owners may face the problem of leakage at connecting points due to improper installation. Such problems are easy to fix on your own by determining the cause.
With the formation of scale and very hard water, the heating elements may fail. If dry heating elements burn out, you can replace them yourself at home. Things are more complicated with submersible elements. They are the most susceptible to scale. But it is recommended to change them only in service centers.
Overview of storage water heaters from different companies
To understand which brand of water heater is better, it is necessary to conduct a detailed analysis of the strengths and weaknesses of the device, let's try to figure it out together.
- Ariston produces water heaters from 30 to 100 liters. Depending on the model and cost, the coating of the inner surface can be either simple enameled or silver-containing, in other words, the company's model range covers all price categories. Noteworthy is the use of a divider, which does not allow mixing of heated water coming from the water supply.The disadvantages include the lack of standard fasteners.
- Electrolux. Over the long years of its existence, this company has established itself as the best manufacturer of impeccable equipment, but its price has always been above average. As for the storage water heaters of this company, they are presented in a fairly wide range, and if you have the means, you will surely find something suitable.
- Burning differs, first of all, in a large assortment. Prices for these products are reasonable, stainless steel and enamel are the most commonly used internal coatings. In addition, high quality and reliability, as well as fast heating of water, can be noted.
- Atlantic produces a water heater with a capacity of 30 to 160 liters. The main feature can be considered an internal coating made on the basis of titanium with quartz and cobalt additives.
- Termex is considered the only manufacturer whose products are exclusively storage water heaters, what can be added to this? Enormous experience accumulated over more than 50 years of work, an extensive catalog of products, excellent quality and reliability, these are the main characteristics of Termex.
domestic proposals
Russian manufacturers, in particular the Alvin and Moidodyr firms, developed and produced such models of water heaters as Success - 15 and Moidodyr. Despite the fact that there is no talk of full-fledged competition with foreign manufacturers, nevertheless, these products are also in certain demand and no serious shortcomings have been noticed behind them.Ultimately, a storage water heater, from a technical point of view, is nothing complicated, and we simply must master this market.
In conclusion, I would like to sum up a little, which, in our opinion, should be considered if you decide to install a water heater:
Correctly select the volume of the heater;
Pay special attention to the reliability of fastening;
Since the device is energy intensive, it is desirable to supply power to it through a separate line with separate circuit breakers, and be sure to perform reliable grounding.
Varieties
The range of heating equipment of this brand is quite diverse. Here are products with a wide variety of functionality and price categories. Among them there are options for both home and industrial use. In general, the range of Electrolux water heaters includes several types.
- Cumulative. They are quite voluminous, but among them there are small-sized options. They do not need large amounts of electricity, despite their impressive volumes.
- Flowing. Differ in good ergonomics due to the compact sizes. They are characterized by rapid heating of water and long-term preservation of the desired temperature regime.
- Gas. Equipped with a copper heat exchanger and characterized by lower power consumption. They are the most convenient to use and can operate in several power modes.
One or another Electrolux electric boiler can be made in a certain form. The range includes not only cylindrical specimens, but also flat ones, which are considered more compact.At the same time, all of them are characterized by high quality, which is confirmed by the relevant certificates and numerous customer reviews.
The best horizontal storage water heaters
Horizontal installation devices represent a special category of accumulative EWH. They are needed in cases where the height is limited at the installation site. The TOP 5 best models of this type are presented below.
Zanussi ZWH/S 80 Splendor XP 2.0
The rating is opened by quite popular model Zanussi ZWH/S 80 Splendore XP 2.0. This pressure vessel can be wall-mounted or floor-mounted.
The main arrangement is horizontal, but it can also be placed vertically.
Management is provided by electronics.
The tank is made of stainless steel.
Specifications:
- heating element power - 2 kW;
- voltage - 220 v;
- maximum water temperature - 75 degrees;
- pressure in the system - 0.8-5.9 atm;
- heating time to maximum temperature - 90 minutes;
- dimensions - 55.5x86x35 cm;
- weight - 21.2 kg.
Advantages:
- electronic control;
- timer for turn-on delay;
- convenient display;
- antibacterial disinfection of water;
- necessary protection systems.
Flaws:
consumers do not report any deficiencies they have noticed.
Ariston ABS VLS EVO QH 80
The top five models include the universal Ariston ABS VLS EVO QH 80 EWH. This pressure-type device is wall-mounted, but can be oriented horizontally or vertically.
Electronic control significantly expands the functionality.
The design provides 2 water tanks with an innovative AG + coating.
Specifications:
- number of heating elements - 3;
- total power of heating elements - 2.5 kW;
- maximum heating temperature - 80 degrees;
- pressure in the system - 0.2-8 atm;
- dimensions - 50.6x106.6x27.5 cm;
- weight - 27 kg.
Advantages:
- extended capabilities;
- antibacterial disinfection of water;
- programming function;
- eco mode;
- convenient indication on the display;
- active electrical protection.
Flaws:
consumers point out only the high cost as a disadvantage, but it is justified by referring the device to the premium category.
Zanussi ZWH/S 80 Smalto DL
The top three devices with the possibility of horizontal installation are opened by the accumulative, pressure EWH Zanussi ZWH/S 80 Smalto DL.
It is designed to be mounted on a wall, but can be either horizontal or vertical.
Management is electromechanical, but with the maximum use of modern technologies.
The design includes 2 tanks with an enamel coating.
Specifications:
- heating element power - 2 kW;
- maximum water temperature - 75 degrees;
- pressure in the system - 0.8-6 atm;
- warm-up time to maximum - 153 minutes;
- dimensions - 57x90x30 cm;
- weight - 32.5 kg.
Advantages:
- simple control;
- convenient display;
- good indication;
- mounting versatility;
- full set of protections.
Flaws:
- increased cost;
- significant weight.
Positive feedback provides high reliability of the equipment and high-quality assembly.
Electrolux EWH 80 Centurio IQ 2.0 Silver
The Electrolux EWH 80 Centurio IQ 2.0 Silver water heater is very popular among owners of private houses.
This model, which provides hot water to several points of water intake at once, has a wall-mounted version with a horizontal or vertical placement direction.
Electronic control.
The tank is made of stainless steel.
Specifications:
- number of heating elements - 2;
- total power of heating elements - 2 kW;
- maximum water temperature - 75 degrees;
- pressure in the system - up to 6 atm;
- heating time to maximum temperature - 180 minutes;
- dimensions - 55.5x86x35 cm;
- weight 21.2 kg.
Advantages:
- durable dry-type heating elements;
- high-quality display;
- USB connector for removable Smart Wi-Fi module;
- special mobile application;
- timer with delayed start of heating.
Flaws:
not detected.
Electrolux EWH 80 Royal Flash Silve
The best horizontal device is Electrolux EWH 80 Royal Flash Silver. This pressure type model is designed for wall mounting in any direction.
Electronic control provides all the necessary functions.
The tank from stainless steel is not subject to corrosion.
Specifications:
- heating element power - 2 kW;
- voltage - 220 V;
- maximum heating temperature - 75 degrees;
- time to reach the maximum mode - 192 minutes;
- pressure in the system - 0.8-6 atm;
- dimensions 55.7x86.5x33.6 cm;
- weight - 20 kg.
Advantages:
- increased durability;
- complete electrical safety;
- high-quality copper heater;
- convenient display;
- timer to delay switching on;
- eco mode;
- protection against scale;
- water disinfection.
Flaws:
not detected.
Useful information

- how many people are in the family (3-4 people need a tank above 80 l);
- how many points of consumption will be connected;
- what are the parameters of the switchboard equipment and the condition of the wiring (whether the power of the water heater is suitable for them);
- Where will the device be located?
- Is it easy to find spare parts for such a model;
- company warranties.
When choosing, you should take into account several differences between boilers and instantaneous heaters (see table).
| Water heater type | |
| Cumulative | flowing |
| Stationary, takes up a lot of space, heavy. | Compact, can be moved (from a summer house to an apartment, for example), much lighter than boilers. |
| External mount only. | There is a possibility of the hidden and open way of installation. |
| There is a storage tank for hot water. | Each time you need to turn on the heating of the water. |
| The presence of a tank and the function of maintaining the desired water temperature significantly saves energy costs. | Less economical type of device for the use of electricity. |
| You should check the condition of the wiring, with a good network, the device will last a long time. | It may require additional cable laying from the shield to the device, since the heater puts a heavy load on the mains. |
When reading people's negative reviews about products, do not trust such words too much. Products of Electrolux, Termex, Ariston companies have never caused any complaints among repairmen and users who step by step follow each item of the instruction manual.
Important to know: a magnesium anode is required for boilers - this way the equipment will be better protected from corrosive particles.
Whichever water heater you choose, a routine inspection should be done after 12-18 months of operation, in order to inspect the condition of the body, elements in contact with water. But if the heater is used frequently, the water is too hard, or the device makes noise, vibrates during operation, the inspection is done immediately. This will help to avoid unpleasant surprises during the further operation of the equipment.
The water heater must be installed only by a specialist - this eliminates mechanical damage, incorrect connection, falling wall appliances, and checks the insulation resistance. Consumers leave good reviews about the quality of Termex, Ariston and Electrolux water heaters.
In fact, everyone is talking about the danger from the “unfortunate specialists”: installers, consultants, carriers. It is better to double-check all their actions and words once again than to regret the broken equipment and lost money later.
Good to know: a routine inspection is mandatory - there will always be sediment from magnesium anodes, it must be removed.
It is very difficult to determine the best water heater among the best manufacturers! Quality, modern technologies, diverse design, practicality - the devices of each company have such criteria. Listen to yourself and analyze your needs again - they will tell you the ideal manufacturer for you.
With proper operation, equipment from Electrolux, Termex or Ariston will serve for several decades - this is how consumers speak about them, and manufacturers assure.
See the following video for an overview of the Termex instantaneous water heater:

















































