Rating of the best water heaters for summer cottages (TOP-16) 2021

Should you choose an instantaneous or storage water heater?

In this aspect, when choosing a water heater, it is better to proceed from the main difference: do you want to instantly receive hot water, but in small quantities, or do you prefer to wait, but be provided with a continuous flow of really hot water in the right quantity. When you choose a water heater, pay special attention to its power; both the heating intensity and the volume of water passing through the installation depend on it. Flow models have more power—the temperature depends on it and the water pressure; accordingly, they use resources more wastefully. Storage, thanks to the thermal insulation system, significantly saves energy and is therefore more productive. Although their dimensions are often difficult to fit into any interior, and the waiting time for heating can reach from 3 to 5 hours, as in models of the Ariston Pro R or Ariston Velis EVO INOX series with a volume of 100 liters.

What to look for when purchasing

Electric water heaters primarily differ in the method and speed of heating water.

Instantaneous water heaters are convenient to use for a small number of people. To provide hot water to 1-2 people during the summer season, a small water heater designed for one water supply point is sufficient. It is rare that several taps are used at the same time. The productivity of these models is 10-15 l/min, the temperature of the supplied water ranges from 40 to 60°C. The problem with such water heaters is also the high power consumption, which can increase energy costs.

For a comfortable stay for a family of 3 or more people who can consume water from several sources simultaneously (for example, washing dishes and taking a shower), water heaters with the ability to heat and store a large amount of hot water are better suited.

Storage water heaters are selected primarily based on tank volume. So for a family of 3-5 people, the optimal size of the tank will be with a supply of 100-150 liters of water. The larger the tank volume, the greater the number of water intake points it can serve. If there is enough space to install a storage tank, these models are more profitable. Because they allow you to have a large supply of hot (up to 75°C) water, which is enough to create comfortable conditions even in a country house.

Classification of water heaters by heating method

All dachas are located in different geographical areas. When purchasing, you must take into account the resource spent to generate heat. One dacha village is rich in sun, another – in wood or coal. You need to start from the simplest option. Then the acquisition will have its value.

Associated financial costs are calculated based on the formula:

volume of consumption per day * cost of fuel * number of days = amount of expenses.

By making preliminary calculations, you can save a decent amount for the family budget. It also makes sense to include in the calculations a possible increase in fuel prices and an increase in electricity tariffs.

Wood and solid fuel water heaters

Not very popular today. Strongly inferior to other options. Inconvenient to use. They look unpresentable.

The device consists of 2 compartments: upper and lower. Wood or coal is placed and lit in one. The second serves as a container for water. There is also a chimney with a diameter of about 110 cm. It turns out that the liquid is heated by smoke, metal and fuel combustion.

Suitable for a summer resident who does not have access to electricity. The boiler requires careful handling. The fire causes the body to heat up. If you touch it, a burn is guaranteed. When installing, be sure to comply with fire safety rules:

1. Wall cladding with fire-resistant material.
2. Metal plate on the floor. Protects from smoldering embers.
3. Remoteness from flammable objects.

Use requires constant attention: cleaning the fuel compartment, adding firewood/coal during operation.
Additionally, you need to ensure that people who could harm themselves do not approach the water heater: children, pregnant women, people under the influence of alcohol or toxic substances. This is dangerous not only for health, but also for the integrity of property due to the risk of fire. They are inexpensive : from 13 to 28 thousand rubles. Floor view only. Volume in liters from 80 to 90.

Solar water heaters

They are plates with rows of glass tubes filled with a chemical composition.
Operating principle: sunlight falls on silicon wafers coated with boron and phosphorus. The movement of particles and the generation of electricity begins. Electricity travels along the attached copper wires to its destination. The advantage is consistency of work. No need for control. The disadvantage is the temperature fluctuation of the supplied liquid. In cloudy weather it will be slightly warm, in sunny weather it will be hot. Recommended for regions with low clouds.

An additional advantage is zero waste and no fuel costs. They take up little space and are installed on the roof of the house to absorb as much ultraviolet rays as possible. The appearance is neat, modern, minimalistic.

Tank from 80 to 500 liters. Price from 81 to 270 thousand rubles. Complete set: tubes with tank and solar tubes separately. The cost of such mechanisms is very high. This is due to environmental friendliness of use.

Gas water heaters

An alternative to solar in the fuel cost category.
A very popular choice for cottages and apartments. Where there is no connection to a gas pipeline, you will need to purchase a portable gas cylinder. This process requires preparation. Sometimes it is better to trust the professionals. Due to a strong impact or exposure to direct sunlight, gas particles inside the cylinder can accelerate to such an extent that there will be an explosion. The device requires preventive inspections. During operation, safety precautions must be observed.

Disadvantages in use will be: noise and changeable temperature. The water heating time is longer than others. The price of the device depends on the traction. If it is natural the cost will be lower. Forced draft must be additionally equipped with a chimney. The price tag will be higher in this case.

Flow-through

Instantaneous water heaters are convenient to use, since there is no need to wait for the entire volume of water to heat up. Convenient for occasional use by a small number of people. The leading positions are occupied by low-power flow-through heaters.

Electrolux Smartfix 2.0 3.5 TS, shower+faucet

It has a laconic design and can be installed in a small room. Three power levels allow you to adjust the water temperature as desired (maximum 40°C). The set includes both a shower head and a faucet. High productivity – up to 2 liters per minute.

Price – 2500-3000 rubles.

ADVANTAGES:

• three heating modes
• ease of installation
• protection against switching on without water (turns on heating when pressure increases)
• works from a regular outlet
• the kit includes everything you need

FLAWS

• With high pressure, the water does not have time to heat up

Electrolux Smartfix 2.0 3.5 TS, shower+faucet

Zanussi 3-logic 3.5 TS, shower+faucet

Capable of quickly heating water up to 50°C. In total, it has three modes (1.5, 2.0, 3.5 kW), which allows you to save on reducing the power consumption of electricity. Mechanical control. Overheat and pressure sensors available. Suitable for use at one water intake point.

Price – 2400-2800 rubles.

ADVANTAGES:

• compactness
• simplicity and ease of use
• easy installation that does not require additional electrical wiring
• overheat protection
• indication of switching on and heating

FLAWS

• According to reviews, to obtain an acceptable temperature for washing, you have to use a very low pressure

Zanussi 3-logic 3.5 TS, shower+faucet

PROFFI HOME PH9028, white

A modern, rather miniature flow-through heater. It is characterized by ease of installation, stylish design and reliability. Equipped with an LED display that displays the heating temperature. A shower head is also included. The maximum water temperature is 60°C.

Price – 2700-3200 rubles.

ADVANTAGES:

• fast heating
• protection against overheating and dry operation
• there is a shower
• works from a standard outlet
• shows temperature

FLAWS

• unreliable plastic fittings for the faucet and aerator

PROFFI HOME PH9028, white

Atmor Basic 3.5, shower

A convenient water heater with a stylish rectangular body, equipped with bright indicators and mechanical controls. There is an accelerated heating mode up to 50°C, overheating protection and a membrane switch. The set includes a hose and a convenient shower head.

Price – 1800-2600 rubles.

ADVANTAGES:

• good value for money
• small dimensions
• according to reviews, installation and connection take no more than 5 minutes
• easy to dismantle
• fully corresponds to the description

FLAWS

• short standard wire (1 meter) limits placement in height

Atmor Basic 3.5, shower

The best pressure instantaneous water heaters for an apartment

When installing such a device in a city apartment, you need to take into account its power. Not all old houses have wiring that can handle a device that consumes more than 5-6 kW. It will be convenient if it is possible to connect several points to the water heater. This water heater is perfect for a private house or apartment.

1

CLAGE CEX 11/13

Rating:5.0

• Power consumption: 13.50 kW (380 V)
• productivity: 7 l/min
• Maximum water heating temperature: 60°C
• Defense: 5
• Connection diameter: ½ “

Average price: RUB 35,500

A compact pressure water heater is suitable for supplying hot water to a kitchen sink, shower or bathroom sink. Connects to a three-phase 380 V network. Using precision electronics, the user can set the outlet temperature in the range of +20℃… +60℃. The maximum power consumption of the device at the highest temperature settings is within 11-13.5 kW. Current operating indicators are displayed on the LCD display. Capacity: 7 l/min

Peculiarities:

• possibility of control from a remote control;
• distribution to several water consumption points;
• The control unit remembers two temperature values ​​for quick switching.

The water heater is mounted on the wall and looks elegant. With proper use and installation it will last a very long time. If necessary, the spiral heating element can be repaired or replaced.

2

Stiebel Eltron HDB-E 12 Si

Rating:4.9

• Power consumption: 11 kW (three-phase 380 V)
• Maximum water heating temperature: 75°C
• Defense: 5
• Connecting diameter: ½”

Average price: RUB 33,900

Just like in the previous model, this device can set the desired temperature with an accuracy of 0.5 degrees. Power characteristics are more modest - 10.7 kW, productivity - 5.4 l/min. Thanks to the electronic control system, the flow rate and water temperature are stable. At the same time, energy consumption is very economical. The device is designed for a maximum water pressure in the main line of 10 atmospheres. Thanks to the IP25 protection class, it can be placed in rooms where jets of water cannot be excluded.

Peculiarities:

• high-quality plastic housing, resistant to mechanical stress;
• the overheating protection system prevents the water temperature from rising to a critical level;
• protection against air locks makes it possible to operate the device with unstable water pressure.

The water heater can be used without any problems to organize hot water supply for an apartment or a large country cottage.

3

Electrolux NPX 8 Flow Active 2.0

Rating:4.8

• Power consumption: 8.80 kW (220 V)
• Maximum water heating temperature: 60°C
• Defense: 4
• Connecting diameter: ½”

Average price: RUB 17,590

The throughput capacity of the pressure water heater is 4.2 l/min. This figure is lower than that of Stiebel Eltron HDB-E 12 SiB, but the price of Electrolux is almost half as much. Touch control significantly increases the level of comfort when using the device. The spiral heating element is made of stainless steel. Experience shows that such a heating element lasts a very long time and does not allow the formation of destructive scale.

Peculiarities:

• the self-diagnosis system recognizes malfunctions and displays information on the display, so serious breakdowns can be avoided;
• The Multi Memory program stores the heating temperature desired by the user in the ECU memory;
• A convenient rotary knob on the front panel makes it easy to manually control the water flow.

An excellent option for use in an apartment or private house. Can replace the main water heater or become a backup source of hot water.

4

Stiebel Eltron DHC 6

Rating 2021:4.8

• Power consumption: 6 kW (220 / three-phase 380 V)
• Capacity: 3 l/min
• Dimensions (WxHxD): 200x360x104 mm
• Installation: vertical, bottom connection, mounting method: wall

Average price: RUB 23,400

It has a stylish, unusual design. The low power of 6 kW and productivity of 3 l/min does not prevent it from properly performing the functions of heating water. It has copper heating elements, several protection systems and simple controls. Positive reviews note that the compact elongated shape allows you to place the device even in a small bathroom.

The main advantage over other heaters with such power is its reliability. Withstands pressure up to 10 Bar. You definitely won’t flood your neighbors.

Minuses:

• not high power. But compared to a “basin of water”, a water heater is much more convenient and comfortable;
• high price.

5

Electrolux NP6 Aquatronic 2.0

Rating:4.7

• Power consumption: 5.5 kW (220 V)
• Maximum water heating temperature: 50°C
• Defense: 4
• Connecting diameter: ½”

Average price: 6,790 rub.

Another high-tech water heater model, developed by Swedish engineers, will easily create coziness and comfort in your home. The basis of the device is a powerful heating element with copper heating elements, protected from scale formation by the proprietary PullSten vibration system. The maximum flow rate is 2.8 liters per minute.

But you can come across negative reviews; first of all, they note the inconvenience of the top eyeliner.

Peculiarities:

• completely small in size, can be installed even under the washbasin (Overall dimensions (H*W*D): 0.141*0.191*0.085 m);
• automatic on/off system ensures safe use of the device;
• not the highest power. Some users do not have enough for a comfortable shower.

The water heating device instantly brings the water temperature level to the desired value and allows you to divert the flow into several routes.

6

Stiebel Eltron DDH 6

Rating:4.6

• Power consumption: 6 kW (220 V)
• Maximum water heating temperature: 60°C
• Defense: 5
• Connecting diameter: ½”

Average price: RUB 13,600

The electrical appliance from a German manufacturer has a laconic design. Has a power of 6 W. The tubular heating element quickly heats cold water for domestic use. Just like the previous model, the device turns on and off automatically. The start of the work process is indicated by a light indicator on the front of the case.

Peculiarities:

• The compact dimensions of the heater (27.4 cm x 22 cm) allow installation of the device in a small space, including under the sink;
• effective built-in overheating protection.

Despite the low price, this device performs its function perfectly and can be used to connect several water points.

7

Thermex Balance 4500

Rating:4.5

• Power consumption: 4.50 kW (220 V)
• Maximum water heating temperature: 35°C
• productivity: 1.8 l/min
• Defense: 5
• Connecting diameter: G1/2

Average price: RUB 4,790

The Italian water heater with a power of 4.5 kW is even more compact than the previous model: it is only 90 mm away from the wall. Finding a suitable place to place such a device is not difficult. Performs its functions over a wide range of hydrostatic pressure from 0.07 MPa. It turns on immediately after water is supplied and turns off when the flow is blocked. The flow level can be adjusted using a mixer or a rotary regulator on the body. Capacity: 1.8 l/min

Peculiarities:

• the spiral heating element is resistant to corrosion and scale and has high heat transfer due to its shape;
• two installation options - with pipes up or down.

This convenient and functional pressure-type water heater has a modern design and will fit perfectly into the interior of a modern home.

for 100-200 liters

Electrolux EWH 100 Formax

A water heater with a 100-liter tank can be placed in both vertical and horizontal positions. X-HEAT technology guarantees a long service life. There is a protection system and three heating levels to select the optimal water use mode.

Price – 20,000-21,000 rubles.

ADVANTAGES:

• temperature adjustment from 30 to 75 degrees
• three operating modes, two dry heating elements
• the tank is protected from corrosion
• using the 55eco mode, two people can wash in a row
• The heating elements work independently of each other; if one of them malfunctions, the second one will work

FLAWS

• some heating elements burned out after a few months

Electrolux EWH 100 Formax

Ballu BWH/S 100 Smart WiFi

The tank volume is 100 liters, with the ability to heat water up to 75°C. Equipped with a special Wi-Fi module that allows you to control the water heater from a smartphone (after installing the appropriate software). There is an eco mode that allows you to use electricity and water more economically.

Price – 26,000 rubles.

ADVANTAGES:

• universal installation, fastening elements included
• stainless steel tank
• automatic shutdown when overheating
• The water heater quickly heats the water and keeps it hot for a long time, heating with an accuracy of one degree
• remote control via Wi-Fi, timer, electronic display, mechanical temperature adjustment via knob, low power consumption

FLAWS

• Lack of wi-fi module included, need to be purchased separately

Ballu BWH/S 100 Smart WiFi

Thermex ER 200 V, white

Storage heater with 200 l tank. Three power levels allow you to balance between heating time and power consumption. Mechanical control with the ability to regulate temperature from 30 to 70°C. The safety valve will protect against water pressure, and the thermostat will turn off the device when the water is overheated and turn it on when it cools.

Price – 27,000-29,000 rubles.

ADVANTAGES:

• powerful, 6 kW
• ability to power both 3 phases and 1
• heats water quickly
• the water doesn't cool down for a long time
• three heat levels

FLAWS

• The LEDs of the heating element switches are directed downwards - when turned on they are not visible

Thermex ER 200 V, white

How to choose a storage water heater

Which water heater is better, vertical or horizontal?

According to the principle of operation, horizontal and vertical water heaters are practically no different. However, due to the location of heating elements on the side, more active mixing of water occurs in horizontal boilers. To avoid getting warm water instead of hot water, which is not heated enough for comfortable use, you should use a nozzle on a tube with cold water. The disadvantages of horizontal models include higher heat losses than vertical water heaters.

Which is better, flat or round?

Boilers also differ in shape. You can find two varieties on sale - round and flat. The round shape is more traditional and is considered optimal in terms of technical characteristics - such a water heater loses less heat and allows you to keep the water hot longer. Its disadvantages include the difficulty of placement - boilers of this type are large in size and take up a lot of space.

Flat-shaped boilers consist of a pair of communicating cylindrical containers. They are distinguished by better separation of water of different temperatures, and also allow it to be heated faster. The disadvantages are the high complexity of the design and lower reliability due to the large number of welds.

What types of coverage are there?

Storage containers can be made of both corrosion-resistant metal and ordinary “black” steel. The service life of stainless steel is longer (10-12 years), but it costs the consumer much more. Cheaper material is prone to oxidation when in contact with water, so it is protected with a fine enamel or other rust-resistant coating. Its main types:

• glass porcelain;
• regular enamel;
• high-quality enamel with special additives;
• titanium enamel.

Many manufacturers use their own exclusive developments in the field of coatings and are constantly improving the corrosion protection of boilers.

REFERENCE. A magnesium anode is included in any good boiler. By drawing back the salts contained in the water, it protects the heating elements and the inner surface of the tank from scale formation and corrosion.

Which inner tank coating is better?

The best option is if the boiler tank is made of stainless steel. However, such water heaters are expensive and, to save money, you can purchase a water heater with a tank made of ordinary steel. To prevent contact with water from leading to corrosion and destruction, a special coating is applied to the metal.

Glass porcelain has good resistance to rust, but copes worse with temperature changes than other protective agents. Conventional waterproof paint is not sufficiently reliable protection, so it is practically not used. Based on enamels, boiler manufacturers create their own unique coatings, the service life of which can be up to 5 years. Special titanium enamel is the most reliable and can be successfully used for up to 7 years.

TERMEX tank coating

"Bioglass porcelain" is a unique technology. This is a coating that perfectly copes not only with rust, but also with thermal expansion and water hammer. It has excellent adhesion to the metal of the tank and does not peel off during operation. Bioglass porcelain is completely neutral to any chemicals. The coating was created in such a way that its coefficient of thermal expansion is equal to a similar parameter for the steel from which the tank is made. During thermal deformations, this allows materials to expand and contract at the same rate.

Ariston tank coating

To protect the metal tank, Ariston water heaters use a special coating - TitanShield. Titanium enamel provides excellent corrosion resistance. Titanium, which is part of it, is non-toxic and has a high degree of environmental safety. To make the coating as effective as possible, Ariston boilers additionally use a magnesium anode, which prevents scale from forming on the walls of the container and thereby protects the enamel from damage.

Coating ROYAL Clima

For the manufacture of ROYAL Clima tanks, stainless steel tanks with a high tungsten content are used - this makes it strong, durable, and rust-resistant. Containers are also made from ordinary steel. To protect them from the inside, a special DUO BIO GLASS coating is used. This is an exclusive development of the company, which is glass-ceramic enamel. To apply it to metal, the spraying method is used, which makes the coating uniform in thickness and avoids air bubbles getting between the enamel and the metal, thereby ensuring excellent adhesion of the coating to the steel.

What tank volume to choose

When choosing a water heater, the first thing you need to do is find out the amount of water that is needed to meet the needs of the people using the boiler. To calculate the volume of liquid consumed, you need to find out the flow rate of the shower head or faucet - you need to find out how much water they pass per unit of time. Economical shower heads consume about 5 l/min.

Next, you should calculate the amount of time each resident needs. It makes sense to take into account water procedures that follow one after another. So, for example, if two people take 20 and 25 minutes to wash, respectively, then t=45 minutes. If you need to wash the dishes immediately, let’s say it will take another 10 minutes, then you should take t=55 minutes.

The thermal coefficient is taken equal to 2.5. It allows you to take into account that water from the tank, with an average temperature of about 85ᵒC, should be diluted until the value drops to 55ᵒC. Thus, a maximally heated 50-liter boiler is capable of producing about 125 liters of water at a temperature comfortable for a person. The following formula is used:

V=Q*t/k, where

• V – boiler volume;
• k – thermal coefficient;
• Q – water flow;
• t – time spent.

Having obtained the value V as a result of the calculation, you should select the nearest larger water heater.

There is also a faster and simpler system for determining volume. It is believed that you should choose a boiler based on the calculation of 30 liters per person permanently residing in an apartment or house. According to this method, for two people you need to purchase a 60-liter water heater.

Storage water heater power

The heating rate directly depends on the power. The more productive the device, the faster its owner will receive hot water. When choosing a boiler based on power, you should remember the maximum currents that the electrical wiring can withstand. Good power: 1500 – 3000 W.

How many heating elements are better?

On average, from 2 to 6 heating elements are installed in a water heater. If there are many of them and they are all turned on at the same time, the temperature will rise faster. A small number of them will reduce energy costs. It is better to choose a water heater with at least 2 heating elements.

Which heating element is better, dry or wet?

Heating elements can be installed in two ways:

• inside the tank - “wet” heating elements;
• outside the tank there are “dry” heating elements.

Dry heating elements have no contact with water, which means there is no scale; such boilers are more durable and reliable. Their disadvantage is that they require a little more time and energy to heat up. Wet heating elements are in liquid, they are more economical, they heat better and faster, but they fail more often. For a long service life of the boiler, it is better to choose a dry heating element.

Heating element material

The heating element is a metal tube made of copper or stainless steel. Inside it there is a heating element in the form of nichrome or fechral wire, insulated from the body with a dielectric filler. A stainless steel heating element lasts longer, especially if it is also covered with glass ceramics. Copper heating elements last less, but they are cheaper to replace.

Thermal insulation thickness

The thermal insulation of most boilers is about 35 mm. However, there are deviations in both thickness and quality of the material. The better the tank retains heat, the less energy will be spent on reheating the water. Choose a water heater with thermal insulation of 35 mm or more.

Guarantee period

For different equipment from different manufacturers, the warranty period varies from 2 to 15 years. Its duration is an indirect sign of the reliability of the device and it is better to purchase equipment that has a longer warranty.

Control methods

To set the temperature, mechanical regulators can be used - rotary knobs, with the help of which the desired parameter value is set. Their design is simple, which ensures high reliability of the device. Another type of control devices is electronic systems. They allow you to set the temperature with great accuracy. The most advanced boilers use remote control via Wi-Fi using a smartphone or tablet.

What additional features would you like to have?

Additional parameters of water heaters:

• In some models, the device can be mounted both vertically and horizontally, which helps to place the device in the most optimal way;
• Availability of protective systems: against scale, against excess pressure, against “dry” heating, against short circuit, against overheating, against freezing, against water rotting and others;
• An important option is setting the heating temperature, which makes it possible to quickly obtain water at a comfortable temperature, as well as save electricity and extend the service life of the boiler;

Some devices have a “smart heating” system with the ability to remember the habits of residents and always provide people with hot water on time. A popular option is remote control of the water heater.

For 50-80 liters

It is not always possible to install large storage water heaters in a small country house, so many people prefer models with a tank capacity of 50-80 liters.

Edison ER 50V

It takes approximately 100-120 minutes to heat a 50-liter tank to 75°C. The design of the device allows you to slow down the cooling of water without using additional electricity. Mechanical control. Convenient mounting for vertical installation, water supply from below.

Price – 4800-5600 rubles.

ADVANTAGES:

• easy installation, there are markings on the box for drilling holes
• heats up quickly
• several degrees of heating
• works quietly
• According to reviews, the tank is enough to wash three people

FLAWS

• does not maintain temperature: first it heats up to the set limit, and then waits for the water to cool to room temperature

Edison ER 50V

Electrolux EWH 50 Formax

The advantage of this model is a system of independent heating elements, which increases the service life of the water heater. The control panel is equipped with a rotary thermostat that allows you to set a comfortable temperature in the range of 30-75°C. The stylish rectangular shape of the case allows it to be installed vertically or horizontally.

Price – 14800-18200 rubles.

ADVANTAGES:

• presence of a separate RCD on the cord
• quick and convenient replacement of the heating element
• Quite fast and quiet heating
• one heating is enough for 2-3 people
• takes up little space

FLAWS

• Incorrect paper template for installation, the difference with the hangers on the heater is 5 cm.

Electrolux EWH 50 Formax

Flow-through boilers: how to install them?

Autonomous hot water supply in a country house is an excellent solution. In order to have sufficient hot water in your country house at minimal cost, it is best to use an electric instantaneous water heater.

When installing it, choose a place near the water point . In this case, heat loss will be minimized, and in addition, the cost of laying pipelines will also be minimal.

By installing this device near the water intake, for example, in the kitchen or bathroom, the owner of the dacha can receive as much hot water as he needs. Heating cold water to the desired temperature occurs quite quickly; this process occurs when a stream of water passes through a heat exchanger. To ensure that the hot water pressure is sufficient and the temperature of the hot water produced is optimal, when choosing equipment you must be guided by the following criteria:

• electrical power that you have on your site;
• the presence of a central water supply line or an autonomous water supply system at the dacha;
• the maximum water flow through the water heater required for you.

When choosing a device such as a water heater for your dacha, you must remember that its performance depends on parameters such as the temperature of the incoming water and the power of the installation. If the device is connected to a centralized water supply, fluctuations in the temperature of the incoming water are possible.

Many heaters are equipped with two types of heating elements: heating elements or spiral ones. The first have a spiral, which is placed in a sealed copper tube. The spiral does not come into contact with flowing water. The main advantage of such elements is their reliability. They ensure reliable operation of the device when air pockets occur in the water supply.

The most common is a scheme that includes a hydromechanical differential pressure switch , supplemented by a power contact group. When the water flow passes through the water heater, a pressure difference occurs at the inlet and outlet of the installation. By means of a relay, the difference is registered, as a result of which the contact group closes. When water supply is stopped, the relay turns off the water heater.

Such a system has several advantages:

• simplicity;
• reliability;
• high maintainability.

One of the disadvantages is the inability to smoothly regulate power due to slight temperature fluctuations. If you use a two-stage pressure switch, then this minus is reduced to zero. And, using a flow regulator, you can smooth out fluctuations in water flow.

In recent years, instantaneous water heaters have become increasingly common. Particularly popular among summer residents are models equipped with an electronic control system. Such a system has the following operating principle: a built-in microprocessor, using sensors and data from a flow meter, determines the outlet water temperature, and in addition the flow rate. Depending on the temperature set by the consumer and the input data, it gains the required heating power. Many modern models have the ability to digitally display the set water temperature.

During the operation of any boiler, fluctuations in the pressure of incoming water are an acceptable phenomenon. This can lead to changes in flow rate , as a result of which the temperature of the hot water can also change over time.

Similar situations may also arise when several water points, for example, a shower, sink, or bathtub, are used simultaneously. To ensure comfortable water treatment, manufacturers from Europe who produce water heaters include flow power control systems in their models. They are able to maintain a constant temperature at the outlet of the device.

For 20-30 liters

Edison ES 30V

The advantages of this heater with a 30-liter tank include fast heating of water. In just 15 minutes you can get enough warm water to wash your face or wash dishes. Power consumption 1.5 W, maximum heating temperature 75°C. Thanks to its compact size, it can be installed under the sink.

Price – 4100-5500 rubles.

ADVANTAGES:

• compact
• easy to maintain
• 5 temperature adjustment positions
• There is enough water for 1 person to wash, the next person needs to heat it up again for about 30-40 minutes
• the product fully corresponds to the description

FLAWS

• Includes weak safety valve
• there are no mounting holes in the bracket

Edison ES 30V

Thermex Ultra Slim IU 30

Quite compact (27x28.5x80 cm), convenient for vertical installation. There are three operating modes: economical, standard and accelerated. It heats the entire volume of water to a maximum temperature of 75°C in 40-50 minutes. The thermostat allows you to maintain the set temperature.

Price – 8200-9800 rubles.

ADVANTAGES:

• narrow, good size for placement in a small niche
• 3 heating modes
• stainless steel tank
• RCD included
• holds heat well

FLAWS

• some have internal tank leaking

Thermex Ultra Slim IU 30

Hyundai H-SWE4-25V-UI102

Stylish design and compact dimensions are the main advantages of this water heater. Tank volume – 25 liters. But due to accelerated heating, this amount is enough to maintain minimal comfort for 1-2 people. On the body there are power and heating indicators, as well as a thermometer. Warranty – 2 years, service life – at least 10 years.

Price – 8000-9000 rubles.

ADVANTAGES:

• protection against overheating and switching on without water
• simple mechanical control
• heats the water quickly, turns itself off when it reaches the set degrees
• There is a thermometer on the body, it is convenient to monitor the current heating temperature
• the entire volume is heated for about 30 minutes.

FLAWS

• not detected

Hyundai H-SWE4-25V-UI102

No. 1. Main types of boilers

Water heaters can be electric or gas. The latter are popularly called columns and are used less and less due to the increased danger. Electric water heaters are usually called boilers . They are well known to many of us; they are characterized by quiet operation, ease of operation, durability and safety, if, of course, the choice was made correctly.

According to the type of heating, electric water heaters are:

• flow-through;
• cumulative.

Instantaneous electric water heaters

Boilers of this type are compact in size and allow you to heat water instantly. Tap water, in contact with the heating element, is heated and enters the tap already hot, i.e. there is no process of mixing it with cold water. Heating of water occurs instantly, since the power of the heating element is decent. Often, boilers of this type are used in apartments where there are frequent interruptions in the centralized supply of hot water. They do an excellent job of heating water for one water intake point. If you turn on hot water in two places at the same time, it may not have time to warm up - it all depends on the power.

The power of instantaneous water heaters ranges from 3 to 27 kW. In an apartment with a single-phase voltage of 220 V, you cannot use an 8 kW boiler. A flow-through boiler with a power of 3-8 kW heats 2-6 liters of water per minute, which is not so little - this will be enough for the household and hygienic needs of a small family.

For a private house with a three-phase voltage of 380 V, you can take a more powerful boiler. Then there will definitely be no problems with a lack of hot water.

Advantages of instantaneous boilers:

• compactness;
• fast water heating;
• The water is heated only when it is needed. Turn on the tap - warm water flows, turn off the tap - the water does not heat up, which means no electricity is consumed, which is the competitive advantage over storage boilers;
• hot water will not run out suddenly. In storage boilers, if the hot water reserves are used up, you will have to wait a long time for heating.

Minuses:

• high power backfires if the wiring in the house is not very good (for Khrushchev and other old houses this is a serious problem), and even if such a boiler is used frequently, the electricity bills will not please you. A storage boiler is more economical in this regard;
• water in a flow boiler may overheat, since it heats up very quickly, and mixing with cold water does not occur. In this case, the boiler will first release hot water, then warm and then cold water will flow from the tap, and only then normal operation will resume. This is why it is very important that the boiler has a heat limiter.

Instantaneous water heaters can be of two types:

• non -pressure It heats water only for one water intake point, so it must be located in close proximity to it. For city apartments this is not the most convenient option, but for dachas such a boiler is ideal;
• pressure _ Such a water heater is built into a water riser, so the device allows you to heat water for several water intake points at once.

a faucet water heater on sale , which can be considered the most simplified version of a non-pressure boiler.

Storage electric water heaters

In any case, a storage boiler will be larger than a flow boiler, since it is equipped with a tank in which already heated water is heated and stored. When someone turns on the tap, hot water from the boiler is mixed with cold water and sent through the faucet or shower head. As the water is consumed or cools, the device turns on the heating again. Tank volume ranges from a modest 10-30 liters to 150-200 liters . Whether such a water heater is installed on the wall or on the floor - it all depends on the size of the tank.

What volume of storage boiler is needed? It all depends on the family's needs for hot water. To wash, on average, one person spends 40-50 liters of water, but keep in mind that hot water from the water heater is mixed with cold tap water. Taking a shower uses less water than running a bath. When choosing the boiler volume, you can focus on the following data:

• a boiler with a volume of 50-80 liters is enough for a small family of up to 3 people to wash dishes and take a shower. In principle, you can take a bath if you heat the water in the boiler to the maximum;
• 80-100 l – option for a family of 4 people. Such a unit does not cost much more than a 50-liter boiler, but a larger tank will take longer to heat up;
• 100-150 l - boiler for a large family, which consists of 6 people. There is enough water for several washbasins, for a shower, and for filling a bathtub;
• Boilers with a volume of more than 150 liters are used, as a rule, in private homes, are installed on the floor and consume a decent amount of electricity.

It’s important not to go wrong with volume. If it turns out to be insufficient, there will be constant inconvenience, and if it is excessive, you will have to overpay and wait too long for heating.

Among the main advantages of storage boilers, we note:

• efficiency. An average boiler, suitable for a city apartment, consumes 1.5-3 kW of electricity during heating and can be connected to a regular 220 V network;
• one boiler, even not the largest volume, is enough to fully provide hot water to all water intake points in the apartment;
• durability.

The storage boiler immediately heats the entire volume of water in the tank, so the larger its capacity, the longer you will have to wait (a 30-liter tank will heat up in 1-1.5 hours, and a 120-liter tank will heat up for up to 4 hours). In addition, a suitable location still needs to be found for huge water heaters. Usually the boiler is located in the bathroom or toilet, so do not forget to take a tape measure before purchasing and measure what size equipment can fit in the bathroom so as not to interfere with free movement. Small-sized water heaters are produced not only in the usual vertical, but also in a horizontal form. Some manufacturers produce built-in models that can be placed in a cabinet under the sink.

Combined water heaters

This type of device combines the advantages of storage and instantaneous boilers. Small-sized combined water heaters weigh no more than 6 kg, are equipped with a tank with a volume of 10-30 liters and can operate in two modes. The choice of such models is not very wide.

For 10-15 liters

In very small spaces, as well as to satisfy the needs of one person, water heaters with miniature tanks of 10-30 liters are quite sufficient.

Electrolux EWH 10 Q-bic O

Compact dimensions with the ability to choose the type of water supply - top or bottom. The models are presented in two versions - with a tank of 10 or 15 liters. A powerful heating element is capable of quickly (15-20 minutes) heating water to the maximum possible temperature of 75°C. It has an ECO mode, which maintains a constant temperature of 55°C, which increases the service life of heating elements and reduces the likelihood of scale formation from hard water.

Price – 5700-6000 rubles.

ADVANTAGES:

• protection against overheating and high pressure
• Compact size, can be installed almost anywhere
• Easy to control using mechanical regulator
• the water in it cools slowly
• The power indicator is bright and visible during the day

FLAWS

• not detected

Thermex Hit 15 U (Pro)

The compact electric water heater is reliable and intuitive to operate. Capable of maintaining the temperature of 15 liters of water heated to 75°C for a long time. There is a protection system against excessive heating, sensors for the presence of water in the tank. The inner tank is coated with porcelain glass, which provides protection against corrosion and increases service life.

Price – 5800-6300 rubles.

ADVANTAGES:

• floor installation, no need to hang
• everything corresponds to the stated parameters
• connects easily
• fits under the sink
• Heats up completely in 25 minutes

FLAWS

• not detected

Thermex Hit 15 U (Pro)

Pressure

The pressure inside the free-flow heater does not differ from atmospheric pressure, while the pressure heater is under the pressure of the main water. You should calculate how many water consumption points there are in the house and the distance between them. If there is a large space between points in the country, each of them will require a separate heater. Separate installation will save heat spent on heating water in pipes from the device to the water collection points.

Pressure-type heaters are installed in hot water pipes. In this case, hot water supply will continue even after its central supply is turned off. The devices are automatically activated after water passes through them. Included with non-pressure devices is a shower or kitchen attachment, which will allow you to change the purpose of the device.

Liquid without running water

But many dachas do not have full-fledged water supply systems, so in such cases the use of bulk water heaters is very important.

Alvin Water heater EVBO-20/1.25-1

Compact dimensions and high heating speed made this country heater very popular. Water heats up to 60°C in 40-45 minutes. The 20-liter tank is equipped with a tap and shower with diffuser. A small, medium-power pump is used to supply water. The water heater operates on standard voltage, maximum power 1.25 W.

Price – 2900-3200 rubles.

ADVANTAGES:

• heats up quickly
• maintains the desired temperature by periodically turning on
• water intake above the heating element level - there is no risk of leaving it dry
• The tap is convenient to open and close
• There is a plastic insert inside, which prevents the body from rusting

FLAWS

• Can't select heating temperature
• unreliable tap

Alvin Water heater EVBO-20/1.25-1

Elbet EVBO-55

The advantage of this garden heater is its 55 liter tank. The maximum achievable temperature is 65°C. Made of high quality black plastic, so water can be heated using solar energy. This allows you to save on energy consumption. The built-in watering can makes it comfortable to use as a summer shower.

Price – 1800-2200 rubles.

ADVANTAGES:

• excellent price/quality ratio
• fast heating
• low power consumption
• durable plastic
• heats up quickly from the sun

FLAWS

• unreliable watering can and faucet, quickly fail

Elbet EVBO-55

Installation and operation

Installation of a low-power instantaneous water heater for a shower is done with your own hands. The work is relatively simple, but requires preparation and great care.

Preliminary actions

It is very important to choose the right place for an instantaneous water heater in the country. Although the design of the device is simple, its service life depends on operating conditions:

• It is strictly forbidden to install the device in an unheated country house; the difference between the air and water temperatures will render any electric heater unusable;
• the device should be installed as close as possible to the place of operation in order to reduce heat loss;
• when installing a flow-through model, it is necessary to take into account the simplicity and possibility of connecting to a water pipe and to the electrical network;
• It is recommended to choose a height for the device that would prevent splashes;
• high water hardness, unfortunately, eliminates one of the important advantages of a flow-through model for a summer residence - the absence of sediment; if the water quality is low, it is necessary to install special filters to protect the device from scale.

The water heater can be installed on any partition, even an interior partition, since the weight of the product is very small.

Installing the device at the dacha

The installation itself is extremely simple:

1. First of all, markings are made on the wall and the surface of the wall is leveled, since the device must be in a strictly vertical position. Holes are drilled according to the markings and the device is secured to the wall using dowels and self-tapping screws. Often, instantaneous water heaters are equipped with fasteners, but they are not always suitable for different types of walls.

2. The simplest connection method is as follows: unscrew the watering can from a stationary shower, and attach the hose to the inlet of the device. The watering can is connected to the outlet, the mixer is moved to the “shower” position. This way the procedure can be carried out.

3. A more practical, but more complex method involves using a tap, usually designed to connect a washing machine. A tee is attached to the outlet and a tap is installed, with which the supply of cold water is regulated. Then a flexible hose is attached to the faucet, which supplies water to the water heater. A watering can is attached to the outlet of the device.

In more complex cases - installing a pressure device in a country house, for example, requires laying a pipeline from the water heater to all hot water distribution points.

A instantaneous water heater is connected to electricity only through an RCD. It is best to allocate a separate line from the switchboard for servicing the device. All this work is performed before water supply.

Important! When connecting to the electrical network, be sure to take into account the correct phase. It is recommended to entrust this stage of work to a specialist.

Operating rules

In order for a instantaneous water heater for a dacha to last for a long time, the following rules should be followed during operation:

• the first start must be performed with good water pressure, otherwise the heating block simply will not turn on; in the future, if the pressure is poor, the average temperature should be set;
• after finishing taking a shower, you need to dig up the tap and turn off the device;
• It is better to use original special nozzles for showers in the country, rather than devices of a conventional design.

During a long break - after the winter period, for example, before turning on the device, it is necessary to check the correct connection, the condition of the connections and the water pressure.

Which water heater is better to buy for a summer house?

The review presents a large selection of models that differ in functionality and capacity for storage water heaters. It is worth paying attention to the following models for a country house or cottage:

• the best water heater with shower – Electrolux Smartfix 2.0 3.5 TS;
• the best inexpensive (budget) water heater is Ariston ABS ANDRIS LUX 30.

The best storage water heater for a home must be chosen depending on the number of people living at their summer cottage: to provide hot water to a family of 2-3 people, a volume of 50 - 100 liters is suitable. For a family of 4-5 people, the tank volume should be 100 - 150 liters.

No. 2. Heating element type

Heating elements are responsible for heating in boilers; spiral heating elements are used less often (they are more powerful, but if something happens, they are more difficult to repair).

Heating elements can be of two types:

• "wet";
• "dry".

From the name it's easy to understand who is who. “Wet” heating element is a copper heating element that is immersed in water and operates like a boiler. Such heating elements are typical for many storage and almost all instantaneous boilers. These are cheap devices, but due to direct contact of the heating element with water, scale quickly forms on it, which has high thermal insulation properties, due to which the heating element’s ability to heat water is reduced. You will have to constantly increase the temperature, and this will affect the service life of the boiler. It is noteworthy that the higher the heating temperature, the faster scale forms. In addition, a “wet” heating element is susceptible to electrochemical corrosion. If your apartment has a water filter installed, then in principle you can use a boiler of this type; it costs less. When working with hard water, be prepared to clean the heating element once every 3-4 months.

The “dry” (steatine) heating element is protected by a special flask and does not come into contact with water, so scale cannot form here. The heat transfer of such a heating element is much higher, and so is the service life, but a boiler with a similar heating element will cost 1.5-2 times more.

Atlantic boilers

A good example of a water heater with a “dry” heating element is the French Atlantic. Atlantic factories are located all over the world. Except China - that’s why Atlantic is often called the most “NON-Chinese” water heaters. Atlantic boilers are equipped with a proprietary soapstone heating element with a service life of up to 20 years. This is ten times longer than conventional inexpensive “wet” heating elements.

Due to the coating of the tank with proprietary enamel with titanium dioxide and a magnesium anode, scale practically does not settle in Atlantic boilers and rust does not appear. Therefore, Atlantic are also the quietest, most economical and reliable water heaters of all that are sold in Russia.

Atlantic work with all types of water and are provided with a maximum warranty on tanks - 7-8 years. And Atlantic does not need to be serviced annually, like most conventional Chinese manufacturers. And once every 2-3 years.

Storage water heaters can be equipped with one or two heating elements . All large-volume boilers, as well as models with a fast heating function, receive a second heating element.