Which water heater to choose: determining the best equipment + model rating
As a sudden shutdown of hot water in the apartment, and its absence in suburban housing negatively affects the quality of our lives. Installing a water heater will help solve the communal issue. But which water heater to choose so that later this device does not create additional problems?
The article describes in detail the types of water heaters and classification features that affect the choice. Recommendations are given that must be followed for safe operation of the equipment To help the buyer, information was provided on the leading manufacturers in the segment and TOP-18 of the best water heaters on the market.
The content of the article:
Varieties and classification features
All domestic water heaters, based on the heating method, are divided into 2 types: storage and flow.
By the type of fuel used for heating, these devices are powered by electricity and gas. They have different prices, designs, sizes and operating principles.
Specificity of storage water heaters
The design, consisting of a tank with a heating element inside, gradually heating the entire volume of water in the tank, is called a storage water heater.
If we consider a more detailed scheme, then it contains the following elements:
- Body. All internal parts of the device are hidden under it. For its manufacture, both expensive and cheaper materials are used. The highest price for models with an aluminum case is followed by stainless steel, and the cheapest option is plastic.
- Thermal insulation. Prevents heat loss. The thicker its layer, the longer the optimum temperature of the water inside is maintained, the device more effectively performs the function of a thermos, and its operation is cheaper.
- The internal capacity of the water heater. It is made of metal, having a protective layer in the form of an enamel coating or of a higher quality - glass-porcelain.
- Pipe for the selection of heated water. Its layer, in accordance with the laws of physics, is located above the cold layer. For this reason, the sampling point is located at the top.
- Feed pipe. Through it, cold water from the system enters the tank.
- Anode. The material from which it is made contains a large percentage of magnesium. Designed to protect the heating element by attracting scale, it settles not on the heater, but on its surface.
- Heater. It includes 2 elements - heater and thermostat. The first is open and closed and is designed to heat water, and the second to control its temperature.
- Thermostat. It can automatically turn on and off the heater when the set temperature is reached.
- Water heating sensor. Electronic or switch. The latter shows only the approximate temperature, and the first, which is very accurate, is equipped with more expensive models.
- Cap. Protects the user from electric shock.
Electric storage water heaters are effective devices for providing independent hot water at home. They have high efficiency, consume a small amount of electricity. Thanks successful electric boiler selection You will always have a supply of hot water.
In garages and cottages where there is no running water, use bulk water heaters that operate on the mains. They are equipped with a temperature limiter, light indication, temperature controller. They are suitable for installation in rooms where the temperature is not lower than +1 degrees C and not higher than +40.
Tank inner cover
It is traditionally believed that a stainless steel tank is more reliable than ordinary steel. This is true, it is not in vain that manufacturers give a 10-year warranty on them. You should be aware that these containers have a weak point - a seam susceptible to corrosion. In many models, it is covered with a protective layer.
A good alternative to the stainless steel is the enamel coating of the steel tank. Additives improving its properties are added to the enamel. In elite models, a glass-ceramic coating is used, silver and titanium ions are sprayed.
To apply these enamels, a complex, expensive technology is used. Which of the listed options for water heaters will be better, everyone decides for himself.
The silver-containing coating disinfects water, prevents corrosion, and prevents microcracks from forming. The heat-resistant coating in the form of titanium deposition obtained by nitriding of titanium at temperatures above 1 thousand degrees C has increased resistance to strong heating.
Most enamels used by manufacturers have the ability to repel scale.
Submersible and steatite heating elements in comparison
There are 2 types of heating elements for storage boilers - submersible or “wet” and steatite or “dry”. More reliable are units with a second type of heating elements.
There is no contact of heating elements with water, as they are placed in a special flask filled with quartz sand or oil. The steatite element has a longer service life, but also almost doubles the cost of a water heater.
A “wet” copper heating element is something like a boiler, it quickly becomes covered with scale, which reduces its thermal conductivity.
The “sacrificial” magnesium anode facilitates the fight against calcium salts deposited on the surface of the heating element. It works on the principle of galvanic interaction of conductors. More electronegative magnesium takes on oxygen ions, thereby preventing the destruction of iron.
The scale deposited on TENE, consisting of magnesium salts, has a lower carbonate hardness and is characterized by a looser structure. Such sediment can be removed mechanically. Reduces the resource of the electrode and the tank body, not only scale, but also suspended particles that scratch their surface. The installation will save from these risks coarse filter.
In the tank there can be both 1 TEN and more, up to 6 pieces. If there are already 2 heating elements, the boiler can be operated in the mode of economical heating - PowerProf. If the boiler has a power of 2 kW, there is a choice between the economy mode with a consumption of approximately 800 watts, average - 1.2 kW or maximum - all 2000 watts.
The design of electric heating equipment provides for the possibility of replacement of TEN, which you can handle on your own, just following the instructions.
Advantages and disadvantages of the accumulative type
The storage water heater or boiler has such a significant advantage as a small power consumption. Its consumer capacities are in the range of 0.9-6 kW.
The boiler works from a single-phase network, it is possible to connect the unit in a city apartment and in a rural house. The main thing is that a 220-230 V outlet is present. Water can be supplied at once to several points.
The boiler can store a large volume of water heated to 65-85 degrees C, periodically heating it. There are a large number of models with tanks capable of holding from 10 to 300 liters. When consumed, hot water enters the mixer, and if necessary, it is brought to the desired temperature by diluting the cold.
The heat-insulating layer allows to minimize heat loss.Usually they do not exceed 0.5 degrees C in 1 hour. In models in which polyurethane foam is used as a heat-insulating material, placed between the tank body and a layer of anti-corrosion coating, the temperature index per day decreases by only 10 degrees.
Unprincipled for connecting storage water heater there is also the issue of pressure in the water main. There are units that work only from the city network with a pressure of 6-7 atm, but there are those that will work even with a pressure of 1 atm.
This makes it possible to use them in cottages and in country houses, where housing is provided with water from the well using an individual pumping station.
The disadvantages are sometimes a long process of heating water. In some cases, about 8 hours pass before the water reaches the set temperature. It depends on the capacity of the tank and the power of the heater. Comparatively large dimensions are unacceptable for individual users, making installation of the unit impossible in some rooms.
The life of the equipment is affected by the quality of the water. With its great rigidity, it is often necessary to change the heating elements, to do prophylaxis using expensive materials. To improve the sanitary-technical indicators of water at the inlet of the water heater, a filter is installed.
Pressure and non-pressure drives
According to the method of connection, storage water heaters are divided into 2 types: pressure and non-pressure. The former are used in systems with a constant pressure of water. Water pressure It can be either constantly high or stably low.
Non-pressure storage devices work when connected to pipelines in which the pressure is unstable. Here, to supply water to the system, a pump is introduced, which is switched on manually or automatically in the event of a voltage drop.
This type is considered obsolete, but it is advisable to use such an aggregate when there is no full-fledged water supply in suburban housing. It’s not scary if the wiring in the house is old - large powers are not needed for the device to work.
Mixing water of different temperatures in the tank is slow. The fact that water enters the tank at a low speed can lead to a drop in the level below the critical value, as a result, the heating elements will fail.
Depending on the method of attachment, storage heaters are horizontal and vertical. Also distinguished are wall units with a tank volume of up to 200 l, floor units with a capacity of 200-1000 l, built-in of various capacities. These are not very significant differences, but they must be considered when choosing.
Determination of the required volume
It is very important to purchase a water heater with such a tank so that it can freely provide hot water to everyone living in the house. To facilitate the selection, you can use the table, which shows the average consumption of hot water for different needs. If you multiply it by the number of people permanently in the house, you get the required tank volume.
When you turn on the boiler for the first time, it will take a long time to heat up. With its further use, you won’t have to wait long before the water heats up. The more powerful the heater, the faster hot water will flow from the tap.
If there are problems with the wiring, then in order to avoid network congestion, it is advisable to install a time relay. It will turn the water heater on and off at a specific time. The cost of such an additional device is low.
Details of what needs to be considered in order to choose a storage water heateroutlined in our recommended article.
Features of instantaneous water heaters
This type of equipment heats the water supplied through a special flask attached to the mixer and equipped with a heating element. Water with the help of this unit warms up to 40 degrees C.
The main difference is instant heating at the time of use of water. The need for the storage tank disappears, therefore, the dimensions of the device are reduced.
The temperature of the water can be controlled by increasing or decreasing the pressure. This device is relatively inexpensive, it saves energy, you do not need to look for a special place to install it. Range flow-through electric models huge, allowing you to make the best choice.
The main disadvantage is high power. Up to 8 kW can be dispensed with a conventional outlet with a voltage of 220 V. The rest are connected to a separate power line with 3-phase power supply. To take a shower, you will need to install a flowing water heater with a capacity of at least 8 kW, or even higher.
If the wiring is high-quality, then as an option you can connect several devices with a capacity of 3 to 8 kW. In houses of the old type, the connection of such devices is problematic. It is better to use a storage boiler that does not create a large load on the electric network.
Flowing water heaters, as well as storage, are divided into 2 types: pressureless and pressure. Devices of the second type are inserted into the pipelines of hot and cold water, then warm water will flow from any tap in the house.
An excellent solution for owners of apartments that are not connected to centralized hot water networks is flowing device on the crane. He quickly prepares sanitary water for sinks in kitchens and bathrooms. Devices turn on and off automatically, responding to fluid pressure.
Non-pressure flowing devices have a maximum power of 8 kW. They can provide only 1 point at a time with warm water. If you want hot water to flow from each tap, then install a water heater will fall on each of them.
Although these models are cheaper than pressure ones, it is not worth buying them for a large house or apartment, and for a summer house, where they live only in the summer, they look good.
The selection criteria for gas flow water heaters will present next article, the content of which we recommend to read.
Rating of the best water heaters
Gas water heaters
Ariston SGA 150
Non-volatile gas water heater with integrated security system
The storage gas boiler is designed to heat a fairly large volume of water - 155 liters. The unit is installed vertically on the floor, as it has impressive dimensions.
The tank is coated on the inside with enamel to prevent corrosion. An additional protection against rust is the magnesium anode. A layer of polyurethane foam is placed between the outer steel casing and the inner tank - a heat-insulating substrate reduces heat loss by 20%.
Features Ariston SGA 150:
- type - gas, accumulative;
- tank volume - 155 l;
- inlet pressure - 0.2-8 atm;
- thermal power - 7.22 kW;
- management - mechanical;
- protection - magnesium anode, safety valve, temperature limiter, overpressure protection;
- sizes - 50 * 145 * 50 cm;
- weight - 53 kg.
Ignition is automatic. To prevent gas from entering the air if the flame goes out, the device provides plasma control of combustion.
The water heater can run on liquefied gas, spending resources very economically. The Ariston SGA 150 model is suitable for serving 4 water points. In 1 hour and 10 minutes, the unit will heat water at 45 ° C.
- Easy to install and configure
- Piezoelectric ignition
- Multilevel Security System
- Maximum heating temperature - 75 ° C
- Low pressure operation
- No thermometer
- In glandular water, after a couple of years it begins to rot at the seams
- No chimney flap
Gorenje GWH 10
Instantaneous water heater with a convenient control system and LED display
Flowing gas water heater is suitable for a small family. In a minute, the unit will raise the temperature of 10 liters of water by 25 ° C. The device runs on natural gas, the consumption of blue fuel is within 2 cubic meters. m / hour.
The Gorenje GWH 10 model is equipped with a copper heat exchanger, the ignition is carried out by batteries, so the device is absolutely independent of the electrical network. Adjustment of temperature and water pressure is carried out by two rotary levers.
Features Gorenje GWH 10:
- type - gas, flowing;
- productivity - 10 l / min;
- inlet pressure - 0.2-10 atm;
- thermal power - 20 kW;
- management - mechanical;
- protection - gas control, gas / water filter, limiting the temperature of heating, preventing freezing, protection against overheating, temperature regulator;
- dimensions - 33 * 59 * 18 cm;
- weight - 9.6 kg.
An open-flow instantaneous water heater draws air directly from the room, so it is necessary to ensure efficient air exchange.Combustion products are removed through the ventilation shaft through natural draft.
Customers often choose the Gorenje GWH 10 due to the good combination of cost, build quality and functionality. Users like the sleek design, small size and ease of installation.
- Low pressure operation
- Water and gas filters
- LED display with temperature indication
- Instant ignition and quick heating of water
- Compact dimensions and ease of installation
- Complaints about noisy work
- No batteries included
- Few service centers
Vaillant AtmoSTOR VGH 220/5
German assembly - a reliable and safe solution for heating water
The hot water tank of the famous German brand is designed to supply hot water to houses, apartments, cafes and multi-purpose premises. AtmoSTOR VGH 220/5 can be used in conjunction with heating boilers.
A gas injection burner with ceramic heat sink rods is built into the unit. Heat loss is minimized - the combustion chamber is surrounded by water. In addition, a heat-insulating layer of solid polyurethane foam is additionally provided.
The gas outlet sensor and the thermoelectric flame monitoring system are responsible for safe operation. The water heater has a flange for cleaning, which facilitates maintenance of the equipment.
Features AtmoSTOR VGH 220/5:
- type - gas, accumulative;
- tank volume - 190 l;
- inlet pressure - up to 10 atm;
- thermal power - 9.5 kW;
- management - mechanical;
- protection - gas control, from overheating, protection against high pressure, temperature regulator;
- sizes - 55 * 176 * 55 cm;
- weight - 95 kg.
There are very few reviews about the model. Limited demand is explained by the high cost of a water heater, the price of AtmoSTOR VGH 220/5 starts from 90 thousand rubles.
- Use of natural or liquefied gas
- Minimal heat loss
- Piezoelectric ignition
- Can be combined with gas heating boiler
- Quality assembly
- High price
- Bulky dimensions and heavy weight
Bradford White M-I-75S6BN
Roomy gas boiler - an option for offices, cottages, industrial and utility rooms
The floor storage boiler with a tank with a capacity of 284 liters and high heat output is perfect for hot water supply of large cottages, office buildings, offices and other premises. The heating speed is impressive - in 1 hour the boiler will heat up about 280 liters of water at 50 ° C.
The storage tank is protected against oxidation by Vitraglass glassy coating with a high silicon content. Hydrojet also prevents the appearance of scale - the water supply technology provides accelerated heating of the liquid and protects the upper part of the tank from overheating. There is a magnesium rod inside the tank, its main task is corrosion protection.
White M-I-75S6BN Specifications:
- type - gas, accumulative;
- tank volume - 284 l;
- inlet pressure - up to 10 atm;
- thermal power - 11.7 kW;
- management - mechanical;
- protection - gas control, from overheating, magnesium anode;
- dimensions - 62 * 162 * 62 cm;
- weight - 120 kg.
The maximum water temperature is limited to 80 ° C, when this indicator is reached, the boiler automatically turns off the heating. In standby mode, the chimney is blocked in the device and gas consumption is significantly reduced.
The standard equipment of the White M-I-75S6BN unit includes: water dielectric fittings, an easily removable traction stabilizer, a brass drain valve and an operating manual. The manufacturer gives a guarantee for the tank - 24 months.
- Large tank capacity - 284 L
- Protective Magnesium Rod
- Maximum heating - 80 ° C
- Hydrojet anti-scale system
- Vitraglass Vitreous Coating - Anti-Oxidation
- Bulky dimensions and heavy weight
- High price tag
- It works only on natural gas
Bosch WR 10-2P23
Piezo compact gas boiler - the choice of many users
This model of flowing water heater is in demand among buyers. Many are attracted to the eminent brand, the compactness of the unit and the complex of built-in security elements. The capacity of the gas column is enough to service two points of water intake.
WR 10-2P23 with an open combustion chamber, a copper heat exchanger is installed inside the housing. The controls are placed on the front panel - there is a slider to select the intensity of the flame and a rotary switch to control the flow of water.
Features Bosch WR 10-2P23:
- type - gas, flowing;
- productivity - 10 l / min;
- inlet pressure - 0.10-10 atm;
- thermal power - 17.4 kW;
- management - mechanical, adjustment of water flow and flame intensity;
- protection - gas control, protection against overheating, limiting the temperature of water heating;
- sizes - 31 * 58 * 22 cm;
- weight - 11 kg.
The heating limit is 60 ° C. Users note the stability of the temperature of the supplied water, quiet operation subject to timely maintenance, ease of management. The column starts even at low pressure, which is especially pleased residents of houses with old water supply lines.
An important factor in favor of Bosch WR 10-2P23 is the numerous customer reviews that allow you to give an objective assessment of the performance and usability of a gas column.
- Work at a low pressure of water
- Complete security system
- Silent work
- Intuitive controls
- No batteries needed for operation - piezo ignition
- After 3-4 years, there is a chance of leakage of the heat exchanger
- Complaints about the incorrect operation of the piezo ignition
- To connect, you need to buy hoses
- No temperature indication
Electric water heaters
Thermex Thermo 100 V
Excellent value for tank capacity
The assembly of the Russian assembly pleases with an acceptable cost with excellent performance and high power of the heating element.
The Thermo 100 V model is made in a classic design - a snow-white cylindrical body with a thermometer and indicator lights. A rotary knob is provided on the bottom panel to select the power mode.
The inner steel tank has a bio-glass-porcelain coating, which increases the protection of the drive from heat and water shocks, and also reduces the likelihood of corrosion due to narrowing or expansion of the tank during temperature jumps.
Characteristics of Thermo 100 V:
- type - electric, accumulative;
- tank volume - 100 l;
- inlet pressure - 0.5-6 atm;
- power consumption - 2.5 kW;
- heating element - TEN;
- management - mechanical, indication of inclusion / heating;
- protection - there is an RCD, a check valve, 1 anode;
- dimensions - 45 * 90 * 46 cm.
The storage water heater with a 100 liter tank is an excellent solution for a large family. Its capacity is enough to service several water points.
- Spacious tank - 100 l
- Heating speed
- Good heat capacity of the tank
- There is a thermometer and an RCD
- Power and heat indicators
- Thermometer malfunctioning
- Single complaints about the flow of the tank after a year of operation
Electrolux EWH 50 Formax
Accumulative boiler with dry heater - the best solution for hard water
A distinctive feature of this model is the presence of a dry heater. Such a constructive solution reduces the unit's demand for water, since the heating element does not contact directly with the liquid.
The EWH 50 Formax water heater has an attractive design - the “flattened” shape of the tank makes it easy to choose the place for its installation. The control panel is extremely understandable and consists of two rotary controls for selecting power and temperature conditions. There are also light indicators on and heating.
Features of EWH 50 Formax:
- type - electric, accumulative;
- tank volume - 50 l;
- inlet pressure - 0.8-6 atm;
- power consumption - 2 kW;
- heating element - dry heater;
- management - mechanical, indication of inclusion / heating, 3 power modes;
- protection - safety valve, RCD, protection against overheating / switching on without water, magnesium anode;
- sizes - 34 * 83 * 36 cm.
Numerous reviews indicate the demand for the model. A 50 liter boiler is suitable for one or two people. Some families choose a small water heater as a backup source of warm water for a period of lack of centralized hot water.
- Dry heater
- Several heating modes
- Protection against overheating and running without water
- Simplicity and reliability of mechanical control
- Good tank insulation
- No temperature indication
- High price
- Complaints about the service center
Stiebel Eltron DDH 8
Pressure flowing water heater from a reliable German brand
A compact instantaneous water heater produces a little more than 4 liters of warm water per minute. The model stands out for its concise design, compact dimensions and high-quality assembly. The manufacturer provides a guarantee for the goods - 36 months.
The water heater turns on automatically - when you open the water tap. The heating power is manually adjusted using a rotary lever located in the center of the housing. High thermal power allows you to use Eltron DDH 8 for several water points, however, you must take care of the reliability of the wiring.
Features Eltron DDH 8:
- type - electric, flowing;
- productivity - 4.3 l / min;
- inlet pressure - 1-10 atm;
- power consumption - 8 kW;
- heating element - copper TEN;
- management - hydraulic, power adjustment - 3 modes, indication;
- protection - heating temperature limiter, protection against overheating, degree of protection of electrical appliances - IP25;
- dimensions - 22 * 27 * 9.5 cm.
The Eltron DDH 8 water level is 5 points. This means that the device can be placed directly in the shower stalls - the body can withstand even direct hit by jets.
Thanks to its compact dimensions and light weight, the water heater is easy to mount on the wall, for this a template is provided. It should be noted that the complete set does not have a hose with a shower head.
- Compact dimensions
- 3 power modes
- High degree of protection - IP25
- Warranty - 3 years
- Fast water heating
- High price
- High power consumption
- No shower head and hose
- No thermometer
Bosch Tronic 1000T ES30-5
Storage tank with a small tank and economical electricity consumption
The representative of the German manufacturer is a compact and energy-efficient water heater. The tank volume is 30 liters, so the model can be recommended for one person. Some choose a small boiler for summer use in the country.
The Tronic 1000T ES30-5 water tank is made of metal 2 mm thick, a glass-ceramic coating is applied to the inner walls - the material is absolutely hygienic and chemically neutral. In order for the water in the heater to maintain longer temperature, a thermal insulation layer (1.8 mm) is provided.
Features of the Tronic 1000T ES30-5:
- type - electric, accumulative;
- tank volume - 30 l;
- inlet pressure - up to 8 atm;
- power consumption - 1.2 kW;
- heating element - TEN;
- management - mechanical, there is an adjustment of the heating temperature, an indication of the inclusion;
- protection - temperature limiter, overheat protection, safety valve, magnesium anode, anti-freeze mode;
- sizes - 35 * 52 * 37 cm.
The time for heating water at 50 ° C is 1.5 hours, but you can wash the dishes or take a shower much earlier. The rate at which water reaches the required temperature depends largely on the season of use. In summer, heating takes less time.
Compact dimensions allow you to install the tank in a limited space - the height of the boiler is half a meter, and the diameter is 35 cm.
- Economical energy consumption
- Compact dimensions
- There is a thermometer
- Glass ceramic tank coating
- Magnesium anode for corrosion protection
- Small tank - 30 l
- Power regulator hidden under the cover
Electrolux NPX4 Aquatronic Digital 2.0
Instantaneous water heater with electronic control and temperature indication
Electrolux instantaneous water heater has a small performance indicator. A feature of this model is the presence of a hidden display. The set heating mode is displayed on the case - the numbers glow in blue. To adjust the temperature buttons are provided.
When the tap is opened and there is sufficient water flow, the appliance automatically starts heating. The nominal pressure is 7 bar, the indicator of the closed duct is 1.7 l / min. A wire with a cross-section of at least 2.5 m is suitable for connecting a water heater2.
Features of the NPX4 Aquatronic Digital 2.0:
- type - electric, flowing;
- productivity - 2 l / min;
- inlet pressure - no data;
- power consumption - 4 kW;
- heating element - TEN;
- control - electronic, there is a temperature control and display;
- protection - limiter of heating temperature, protection against overheating, temperature regulator, protection against operation without water;
- dimensions - 19 * 14 * 9.5 cm.
The manufacturer claims that the unit is suitable for servicing two points of water intake. However, in practice, while opening the taps in the kitchen and in the bathroom, the water temperature drops significantly. The best option is for washing dishes. The water heater can be mounted on the wall or hidden under the sink.
- Concealed temperature display
- Compact dimensions
- Convenient temperature adjustment
- Scale protection - Pullsten technology
- Indication of heating and inclusion
- Complaints about failures in the automatic start
- Short power cable
- Low productivity - 2 l / min
Ariston ABS ANDRIS LUX 10 OR
Ariston mini-boiler - exclusive design, reasonable price tag and a complete protection system
A storage boiler with a mini-tank is a good alternative to an instantaneous water heater. This option is suitable for apartments and houses with intermittent water pressure.
The inner tank is made of steel, the outside is covered with plastic, and from the inside Ag + - a composite coating with silver ions prevents the formation of corrosion and helps to clean the water. The manufacturer assures that water acquires bacteriological properties in relation to many microorganisms.
Features ABS ANDRIS LUX 10 OR:
- type - electric, accumulative;
- tank volume - 10 l;
- inlet pressure - 0.2-8 atm .;
- power consumption - 1.2 kW;
- heating element - TEN;
- management - mechanical, indication of inclusion;
- protection - RCD, heating temperature limiter, overheating protection, safety valve;
- sizes - 36 * 36 * 30 cm.
A ten-liter tank is not enough to fill the bath, but such a displacement is enough to take a shower by one person and wash the dishes. The mini-hot water can be installed above the sink or on the wall in the bathroom, while it is important to prevent direct water jets from entering the body, as the protection class is IPX4.
- Beautiful design and compact dimensions
- Temperature adjustment
- Power cable with RCD
- Fast water heating
- Tank Warranty - 5 years
- The need for periodic maintenance
- Plastic scratches quickly
- Low volume of heated water
Hyundai H-SLS1-30V-UI705
Ultra-compact water heater from the South Korean brand: energy efficiency and reliability
A beautiful Hyundai water heater stands out among its competitors in a narrow case, the unit diameter is only 28 cm. Due to its compactness, the device can be placed in a small niche.
The internal tank and boiler components are made of stainless steel (SUS 304 grade, thickness 1.2 mm), therefore the device is reliably protected from corrosion. Between the storage tank and the outer casing is a dense layer of thermal insulation. Due to the absence of “thermal bridges”, heat losses are minimal.
Features of the H-SLS1-30V-UI705:
- type - electric, accumulative;
- tank volume - 30 l;
- inlet pressure - 1-7 atm .;
- power consumption - 1.5 kW;
- heating element - TEN;
- management - mechanical, indication of inclusion;
- protection - non-return valve, protection against excessive pressure and overheating, magnesium anode;
- sizes - 28 * 77 * 28 cm.
Reviews about the model H-SLS1-30V-UI705 are mostly positive. The water heater is praised for the rapid heating of the water and the duration of the temperature. There are no complaints about the operability of the device.
There is no display in the unit, and the mode controller is located on the underside of the case. It should be noted that to connect a boiler, it is necessary to purchase an RCD - a protective device is not included in the package.
- Narrow case - 28 cm
- Stainless steel tank
- Good heat retention
- Integrated Security System
- Enlarged Magnesium Anode
- No RCD
- High price
- No thermometer and display
- Tank Volume - 30 L
Thermex Surf Plus 6000
Instantaneous water heater with a spiral heating element
The Surf Series water heater is suitable for supplying warm water to several points of intake. The maximum heating temperature is 38 ° C. In a minute, the unit will increase the temperature of 2.5 liters of water by 35 ° C. With a capacity of 3.4 l / min, the water warms up at 25 ° C.
The Surf Plus 6000 has a spiral heating element. In contrast to the heater, the spiral warms up very quickly and has a high efficiency.
Features Surf Plus 6000:
- type - electric, flowing;
- productivity - 3.4 l / min when warming up at 25 ° С;
- inlet pressure - 0.5-6 atm .;
- power consumption - 6 kW;
- heating element - spiral;
- management - hydraulic, indication of inclusion;
- protection - from switching on without water, from overheating;
- dimensions - 13 * 18 * 6.8 cm.
Reviews about the model are somewhat contradictory. Some users were absolutely satisfied with the purchase - they praise the simplicity of installation, the possibility of flush mounting and heating efficiency. However, there are complaints about the build quality.
- Reasonable cost
- Compact dimensions
- Fast water heating
- Maintenance of multiple water intake points
- Quick installation - there is a mounting plate
- Separate power line input desirable
- High power consumption
- Fragile plastic wall mount
- High pressure sensitivity
- No shower head included
Combined Water Heaters
Gorenje GBK 150 OR
Water heater with a well-thought-out security system, a dry heater and convenient electronic control
The storage unit of the indirect-electric heating method boasts excellent technical equipment and functionality.
The inside of the tank is coated with enamel, which is chemically neutral, does not affect the quality characteristics and smell of water. This treatment in tandem with a large magnesium anode protects the unit from corrosion. The manufacturer is confident in the quality of his product and provides a long-term warranty on the tank - 7 years.
To provide the house with hot water outside the heating season, 2 dry heating elements are provided - the heating elements do not come in contact with the liquid medium, therefore they last for a long time. Heat losses are 1.64 kWh / 24 h; for maximum heat preservation, a high-quality heat-insulating layer is provided.
Characteristics of GBK 150 OR:
- type - indirectly electric, accumulative;
- tank volume - 150 l;
- inlet pressure - up to 6 atm .;
- power consumption - 2 kW;
- heating element - 2 dry heating elements of 1 kW each, an enamelled steel heat exchanger with an area of 0.9 sq. m and a capacity of up to 17.6 kW;
- control - electronic, thermometer, display, indication of heating / inclusion;
- protection - non-return valve, frost prevention, magnesium anode, protection against overheating and overpressure, self-diagnosis of malfunctions;
- sizes - 50 * 133 * 51 cm.
An interesting “Anti-Legionella” option is implemented in the unit - if the water in the boiler has not warmed above 65 ° C for two weeks, the device will automatically raise the water temperature. This function prevents the emergence of pathogenic bacteria.
- Dry heater
- Display and self-diagnosis option
- Integrated Security System
- Anti-Legionella Function
- Tank Warranty - 7 years
- High price
- The complexity of connecting
Thermex Combi ER 80V
Indirect-electric heater of the Russian assembly - simplicity of design and reasonable price tag
Indirect heating boiler with heating element is characterized by good workmanship. A capacity of 80 l consists of steel tanks, between which a thermal insulation layer 50 mm thick is placed. Inside the tank is coated with glass porcelain. To protect against corrosion processes, a double magnesium anode is provided.
On the front side of the boiler there is a removable panel. It opens access to the heating element, anode, thermostat and thermal switch. The control knob for selecting the heating temperature is also placed here, the maximum figure is 75 ° C.
Features Combi ER 80V:
- type - indirectly electric, accumulative;
- tank volume - 80 l;
- inlet pressure - up to 6 atm .;
- power consumption - 1.5 kW;
- heating element - heater, spiral heat exchanger with an area of 0.59 sq. m and a maximum power of up to 14.6 kW;
- control - mechanical, thermometer;
- protection - magnesium double anode, temperature regulator, overheat protection, safety valve;
- sizes - 50 * 85 * 56 cm.
A temperature switch will prevent the appliance from heating water above 95 ° C; if the temperature rises excessively, the boiler will automatically disconnect from the mains. The safety valve relieves excess pressure through the drainage hole, therefore, when installing the water heater, it is necessary to provide drainage to the sewer.
- Reasonable cost
- Double magnesium anode
- Bioglass-porcelain coating of the inner tank
- Long-term heat
- No display and self-diagnosis options
- Access to the thermal switch through the removable panel
- No protection against switching on without water
Thermex Combi ER 200V
Spacious combined unit - a solution for a country house or small business
The Combi series unit with a spacious tank is suitable for users who need to receive a large volume of hot water in the shortest possible time. It takes about 2.5 hours to heat the entire tank 45 ° C higher.
The Combi ER 200V device complies with domestic GOSTs and international standards. The inner surface of the tank is covered with glass porcelain, polyurethane thermal insulation contributes to the conservation of heat. The control panel with the temperature controller is located behind the removable panel on the front of the case.
Features Combi ER 200V:
- type - indirectly electric, accumulative;
- tank volume - 200 l;
- inlet pressure - up to 6 atm .;
- power consumption - 3.5 kW;
- a heating element - a heating element, a heat exchanger with an area of 1.4 square meters and a maximum power of 34.6 kW;
- control - mechanical, thermometer;
- protection - magnesium double anode, temperature regulator, overheat protection, safety valve;
- dimensions - 54 * 145 * 64 cm.
The boiler is rather bulky and heavy, the weight of the water heater is 74 kg. The Combi ER 200V is designed for outdoor installation.
- Spacious tank - 200 l
- Double magnesium anode
- Long-term heat
- Tank with bio-porcelain coating
- Good value for tank
- Bulky dimensions
- Single complaints about the heating of a heating element
- No protection against switching on without water
- No display and self-diagnosis options
Drazice OKC 125
The hinged combined water heater from the Czech brand - high-quality assembly and convenient operation
Boilers of the Czech manufacturer have established themselves as reliable and efficient units. In the arsenal of the brand are different types of water heaters.
Model Drazice OKC 125 - combined. The storage boiler is equipped with a 2.2 kW “dry” heating element for heating water outside the heating season. In winter, the unit warms up the water indirectly through an installed heat exchanger.
For ease of operation, the front panel has a temperature controller and a thermometer.
Features of Drazice OKC 125:
- type - indirectly electric, accumulative;
- tank volume - 125 l;
- inlet pressure - up to 6 atm .;
- the heating element is a “dry” heater with a capacity of 2.2 kW, a heat exchanger with an area of 0.7 sq. m and a maximum power of 17 kW;
- control - mechanical, thermometer, power-on indication;
- protection - magnesium anode, safety valve, protection against overheating, overpressure and freezing;
- sizes - 52 * 107 * 52 cm.
Water is heated by an electric heater from 10 ° С to 60 ° С in 3.5 hours. In indirect heating mode, water warms up faster.
Users respond positively to the operation of the unit. Installation and connection of a water heater does not cause any difficulties - the set includes a check valve, brackets and fixing screws.
The drain valve will have to be bought separately, it must be installed at the water inlet to provide an opportunity for dismantling and repair. A service hatch is provided for boiler maintenance (descaling, water stone and sediment).
- "Dry" TEN
- Thermometer and temperature control
- Anti-Legionella Function
- Fast heating rate
- Multilevel Security System
- Inaccuracy of thermometer readings
- No recirculation
- No display and self-diagnosis options
- The drain valve must be purchased
Drazice OKC 200
High-performance indirect electric heating boiler with dry ceramic heating element
A water heater with a 200 l tank is an acceptable option for a large private house, cafe and other premises.
The combined unit is equipped with a ceramic “dry” heating element placed in a steel sleeve. This design facilitates the replacement of the heating element, increases the heat transfer surface and prevents the formation of scale on the heater.
The water tank and flange cover are made of steel. A single material prevents the appearance of a galvanic effect and the occurrence of electrochemical corrosion.
Features Drazice OKC 200:
- type - indirectly electric, accumulative;
- tank volume - 200 l;
- inlet pressure - up to 6 atm .;
- the heating element is a “dry” heater with a capacity of 2.2 kW, a spiral tube heat exchanger with an area of 1.08 sq. m and a maximum power of 17 kW;
- control - mechanical, thermometer, power-on indication;
- protection - magnesium anode, safety valve, protection against overheating, overpressure and freezing;
- dimensions - 58 * 130 * 58 cm.
A 42 mm thermal insulation layer provides good heat retention. On the front panel there is a thermostat knob to select the temperature mode. Due to the high degree of protection, the Drazice OKC 200 water heater can be installed in the bathroom.
- Spacious tank - 195 l
- "Dry" ceramic heater
- Thermometer and temperature control
- Multilevel Security System
- High degree of protection - IP45
- Bulky dimensions
- No display and self-diagnosis options
- The drain valve must be purchased
Safe operation of equipment
The main element that guarantees the safe operation of a storage water heater is a thermocouple. It automatically turns off the heating element after heating the water to a predetermined temperature. The thermocouple consists of 2 conductors having different resistance.
If the thermocouple for some reason ceases to function, the safety valve is turned on. It is installed at the inlet, incorporates a valve with a spring, which is in a relaxed state at a pressure in the system of up to 7 atm.
As soon as the pressure reaches a critical value, the spring is compressed under its action and opens the drain hole. Part of the hot water flows out, the pressure inside the tank decreases.
When choosing a water heater, you need to pay attention to its protection class, especially if the water often shuts off. The best choice in this case would be closed water heaters with protection class IP 24, IP 25.
In a instantaneous water heater, a pressure sensor is responsible for safety. It turns off the heating elements automatically when the pressure in the water supply drops during the closing of the tap.
About how to properly use a water heater, you can read here. Compliance with the operating rules significantly extends the working life of the equipment.
Comparison criteria for water heaters
Manufacturers are constantly upgrading their products, producing advanced models. The comfort in the house will depend on how correctly you can choose a water heater. To a large extent, the reliability of the equipment is determined by the company that produced it.
An important question facing the buyer is whether the water heater is suitable for you in all respects. To make an unmistakable choice, you need to know the main evaluation criteria.
In order to objectively evaluate the advantages of the model of storage water heater, you need to compare by the following parameters:
- Volume. Tank capacity may vary. Units with an average drive volume of 30-100 liters are in the greatest demand.
- Power. For high-quality models, it is far from small.
- Type of element for heating. It can be in the form of a spiral or TENA.
- The presence of a "sacrificial" anode.
- Electrical protection class.
- The manufacturer’s popularity.
Not in the last place is the price of the unit, but in the pursuit of cheapness, do not forget about quality. Excessive savings can result in many problems during operation.
Overview of storage aggregate manufacturers
For manufacturers that have long earned the trust of consumers, first of all, Ariston. Accumulative water heaters at a quite affordable price, have a stylish design, have an impressive list of additional functions, a high degree of security.
The automatic shutdown mechanism protects against electric shock during a breakdown of the tank; there is a special valve that operates at high pressure.
The leading producer is the European manufacturer Thermex, in particular, the ID 50 V model is in great demand. It has compact dimensions, good design, low power. Check valves and safety valves are available. This model has a serious drawback - the tank is subject to corrosion, because it has a weak anti-corrosion coating.
Bosch's name is in many ways associated with the concept of reliability. Her products always top the table of the rating of water heaters in the world market. The devices of this manufacturer are distinguished by their durability, convenient settings, optimal power and the corresponding price, justified by high quality.
There are 3 categories of Bosch products:: Basic, Comfort, Top, differing in both excellent characteristics and price.
Products of the Czech manufacturer of storage water heaters Drazice also have positive reviews. They are designed to heat water to 95 degrees C in large volumes - at least 90 liters at a time. Models have high-quality corrosion protection, low heat loss.
The Swedish company Electrolux also produces water heaters with excellent performance. The CENTURIO EWH 80 model is especially popular, equipped with a capacious stainless steel tank (80 l) and a tubular heater. It features excellent thermal insulation and stylish design.
This model does not have only an anode that protects the tank and heater from corrosion. Having chosen the Electrolux models, you should make sure that they are not assembled in China.
Manufacturers of instantaneous water heaters
For owners of small apartments, heaters manufactured by AEG are a good choice, but under the condition that the wiring there is new. All parts of the device, which may be splashed with water, have a corrosion-resistant coating. The material of the tank has shockproof properties.
For individual consumers, the disadvantage is high energy consumption and high cost.
Electrolux, in addition to storage water heaters, produces flow models. Their advantage is safety, intuitive interface, ease of installation. Based on some reviews, heating elements are not durable.
Polaris Mercury attracts streamlined shape, allowing you to install the device anywhere. Heats the water very quickly. Some low-cost models have low efficiency, the limit for them is 40 degrees C.
Conclusions and useful video on the topic
The author of the video gives an objective assessment of the flow and storage water heater. He talks about the pros and cons of each, based on his own experience:
The advice of professionals on choosing a water heater, depending on the material of the tank, you will hear when watching this video:
It is difficult to make a choice with such a variety of water heaters. But the reference should be their own needs and the reliability of electrical wiring. If you need truly reliable, high-quality equipment, do not save on the price.
Want to talk about how you chose a water heater for installation in an apartment, cottage or country house? Is there any useful information for visitors to the site or have questions during the review of the material? Please write comments in the block below, share your opinion, leave a photo on the topic of the article.
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In the summer, the topic of boilers and water heaters is very relevant even in city apartments, and even more so in private houses. Last year, he made repairs in the bathroom and at the same time installed a water heater. The house is old, so only the funded was really set. They chose a horizontal flat one, fit very well into the bathroom and did not clutter up the space. If you have small children, the more necessary thing, because in the summer and for a month they can turn off the water, you can’t run into basins.
I decided to replace the gas column with an electric water heater. After consulting with a specialist, I chose Ariston. We live together with our wife, so we took a volume of 50 liters. A familiar electrician helped install. It took 2 hours to install.It is possible to heat water up to 80 degrees, but up to 60 degrees is quite enough for us, especially since the water keeps hot during the day without heating.
And which boiler to choose within 10 thousand rubles? And how to protect it from the formation of scale in the tank and on the heating element?
And how much tank volume is needed? This also directly affects the cost of the boiler. I will offer options with a tank volume of 50 liters, so that there is an idea of what you can get with a budget of 10 thousand rubles. Here are a few options:
1. THERMEX NOVA 50 Slim boiler (made in Russia, 2 heating elements of the “dry” type) - the price is 8300 rub .;
2. Boiler WILLER EV50DR optima (made in China) - the price is 8600 rubles .;
3. Boiler Nova tec NT-DD 50 (production Ukraine) - the price is 8300 rubles .;
4. Boiler ELDOM Style DRY 50 SLIM 2 × 0.8 kW 72267WD HITET (made in Bulgaria) - price 9,400 rubles.
5. Boiler GALANTA DRY 50 SLIM 1.6 kW 72267 WDG (made in Bulgaria) - the price is 9500 rubles.
As for the formation of scale, then it will not form on the heating element, and this cannot be avoided on the tank if you do not install filters. There are special filters, both for strilocks, and for boilers that pre-purify water.