Which instantaneous electric water heaters for showers are better: review of the TOP 10 models and customer reviews

The simplest way to organize the supply of hot water for washing is to install a flow-through electric water heater for the shower in the bathroom. The household appliance is noticeably cheaper than a storage boiler and takes up less space. When choosing and installing a heating device, you need to take into account a number of points - available power consumption, the number of water points, the condition of the wiring, and so on. Let's look at how to independently select and install an instantaneous water heater in a country house or apartment.

Operating principle

Instantaneous electric water heaters are devices that look like small heating boilers. Heating is carried out by heating elements - copper tubes with a spiral inside.

They can only be turned on if there is water, otherwise the heating element will burn out. To prevent breakdown, a protection mechanism is installed, consisting of a thermostat and a shutdown sensor. The water passing through the heating element comes out of the device already hot . In addition, the device is equipped with filters that protect against the entry of solid particles.

Depending on the connection method, water heaters can be pressure or non-pressure.

Pressure-type devices can be used to supply hot water to both the bathroom and the kitchen. Gravity heaters are designed to supply hot water to a specific location (usually the kitchen). Such devices are more compact and consume less electricity .

Design of a protective grounding loop

The most common version of such a circuit is a triangle of metal grounding conductors connected by a steel strip. The same strip is displayed on the wall of the building, then connected to the electrical panel body with a copper bus.

How to properly make grounding in the form of a triangle:

1. Purchase 3 grounding rods - smooth or corrugated reinforcement rods Ø16 mm, each 2 meters long. For connection you need a strip of 40 x 5 mm.
2. At a distance of 3 m from the base of the house, dig a pit in the form of a triangle with a side of 2 m. Depth - 0.5 m.

3. Sharpen the ends of the reinforcement and drive it into the ground to its full depth. The driving points are the vertices of the triangular pit.
4. Weld a steel strip to the ends of the rods, as shown in the photo. Lead the end of the strip through the trench to the outer surface of the wall. Attach the tire to the base and weld a bolt at the end.
5. From the shield, lay a copper busbar outward and screw it to the strip. The ground loop is ready.

Before burying the hole, treat the steel contour elements with bitumen mastic. How to make grounding for an electric heater with your own hands is clearly demonstrated in the video:

Advantages and disadvantages

Flow heaters have the following advantages:

• simpler installation and lower cost compared to storage boilers;
• compactness;
• fast heating of water.

The negative aspects of such devices include:

• high energy consumption;
• the need for sufficiently high pressure in the water supply;
• inability to accurately adjust the water heating temperature.

The correct choice of water heater is of great importance. These devices differ from each other in many characteristics : power, minimum operating pressure, control methods (for example, stepwise or smooth temperature control) and other parameters.

After purchasing a water heater, you need to choose a place to install it.

Customer Reviews

How much a tankless water heater can cost depends on the product model. The price of the equipment is high due to the power consumption. Devices “Termex”, “Evan”, “Electrolux” are distinguished by their compact sizes, high heating speed, and additional built-in elements for safe use. When choosing a water heater, you need to pay attention to the technical characteristics of the model.

The flow-through type of water heating device is in demand due to frequent shutdowns in the summer. Powerful electrical appliances require careful preparation for installation work for proper connection. Compliance with operating conditions and timely diagnosis of problems will increase the service life of the water heater.

Selecting a location

Almost any room can be chosen to install an instantaneous electric water heater: bathroom, kitchen, toilet or even shower . The main thing is that the installation location meets certain criteria:

• protection from moisture (for example, splashes from a shower);
• ease of turning the water heater on and off;
• ease of use of the tap or shower to which the device is connected;
• ease of connection to the water supply;
• proximity to the mixer to avoid unnecessary heat loss.

There are no special requirements for the wall itself due to the light weight of the device.

By energy source

This criterion takes into account how the heating will be carried out. From this point of view, all devices are classified according to the heat source:

• electrical;
• gas;
• wood-burning

In models of the first type, the water is heated thanks to the presence of a heating element. They are most in demand in the described segment, since their power is sufficient to meet existing needs. If the house has electricity, there will be no connection problems. In addition, such units have an affordable price.

In models of the second type, the water is heated by a gas burner. A gas heater with a shower for a summer cottage is the best option if there is a connection to central lines. Of course, there are modifications on sale that operate from a cylinder. But their operation is complicated by the need to constantly refill this cylinder. And, from a safety point of view, such devices require special care. In a house where small children live, this is extremely difficult to achieve. A wide range of devices with flow-type operation and with storage tanks are on sale, so this increases the possibilities of choosing a device taking into account the technical features of a country house.

Gas models Source kasskad64.ru

A wood-burning water heater for a shower in the country is purchased by those who have problems with power supply in their place of residence. Its structure resembles a potbelly stove. There is a firebox and a water tank through which the chimney pipe passes. The water is heated by heat from the stove and from the exhaust pipe. This design has its advantages:

• ease of use;
• reliability;
• the ability to use not only firewood for kindling, but also waste remaining after construction, old furniture;
• long service life.

Wood burning installations Source firreplace.ru

Tools and materials

Before installing an electric instantaneous water heater on a shower, tap or pipes, you should stock up on the following set of materials and tools:

• instantaneous water heater;
• impact electric drill;
• Victory drill;
• screws with dowels;
• screwdriver;
• gas key;
• FUM tape;
• pliers.

Calculation of device power

The performance of a flow-through boiler is calculated in liters per second. You can calculate what device will be needed for the existing conditions. To do this, the specific heat capacity of water (4.2) must be divided by the temperature difference. Multiply the value by the consumption. For example, you need to heat water from 10 to 40 °C. Consumption is 12 l/min or 0.2 l/s. For these parameters, a 25 kW unit is required.

The power of an instantaneous water heater can be determined based on the purpose of use.

Installation and connection to the water supply

At the first stage, marks are made on the wall in places corresponding to the fastenings. Here they drill holes and drive dowels into them or install brackets (if they are included in the kit). The water heater is attached to them.

Connecting an electric instantaneous water heater to water can be done according to several schemes . In the first case, you will need 4 valves and two outlet adapters - “tees”. One valve is inserted into the pipes with hot and cold water. Tees are installed between them and the mixer.

A water heater is connected to them: the inlet is connected to a pipe with cold water, the outlet is connected to hot water. Valves are also installed on the pipes between the water supply and the water heater. If the water heater is turned off, then the valves leading to it are in the closed position , and those on the pipes are in the open position.

When turning off hot water, a number of manipulations must be performed. You need to close the valve on the hot water pipe, open the valves leading to the heater, and turn it on. When hot water appears, reverse the steps.

There is also a simpler option for installing a flowing electric water heater - on a shower , in which the device itself is not connected to the hot water supply pipe. In this case, its outlet remains free. When the hot water is turned off, a shower hose is connected to it, from which the watering can is pre-twisted.

After this, the valve located at the inlet opens . Now, when you turn the mixer switch to the “shower” position, hot water will flow, and when you turn the mixer switch to the “faucet” position, cold water will flow.

In approximately the same way, an electric water heater is connected in those buildings where hot water supply is not provided for by the design (for example, in country houses). The only difference is that instead of a shower hose, a stationary pipe is used. It can be made of almost any material: metal, plastic, etc.

This video shows how to install an instantaneous electric water heater on a shower:

How to install an electric boiler with a storage tank? And what are such devices good for? Find out for yourself. There are also compact water heater faucets that are great for the kitchen sink. Find out more about these models and their selection.

Special taps with sensors will allow you to use the water you consume more economically; here https://sansovet.com/kvartira/vannaya-komnata/krany-s-ik-datchikom.html you can find out all about them.

The principle of flow-through water heating

The water flow is heated as it passes through the heating element. The more powerful it is and the lower the pressure, the higher the temperature will be. The boiler has small dimensions due to the absence of a storage tank. For the same reason, after opening the tap, hot water flows immediately: there is no need to wait until the entire volume of the device heats up.

Internal structure of the device

The main part is the heating element.

It is controlled by a relay, which is monitored by temperature and flow sensors. If the water flows weakly, the mechanism does not start. The temperature sensor protects the structure from overheating.

The problem of providing electricity

The disadvantage of flow-through devices is their high electricity consumption. The power is approximately 7 kW, which is comparable to the consumption of an entire apartment.

Electrical connection

Connecting to the electrical network should be given no less attention than to the water supply. First of all, it is necessary to calculate the total power of all electrical appliances in the apartment , including the installed water heater. The resulting figure must be compared with the characteristics of the general circuit breaker.

It should be borne in mind that in many old buildings, switching equipment and electrical wiring are not designed for the power that consumers load them with today. Therefore, it is better to replace them if possible.

The power of most single-phase water heaters is up to 9 kW at a current of up to 27A . Considering the high power of such devices, it is advisable to run a separate line from the electrical panel to power them. When connecting, it is recommended to use a three-core PVS 3x4 cable.

At the same time, we must not forget that current in a damp room is most dangerous, so electrical safety considerations should come first. Therefore, it is imperative to install a residual current device in addition to the circuit breaker.

Connecting the wire itself does not seem difficult. As a rule, the connection diagram is given in the instructions. There is a terminal block under the water heater cover. It is necessary to connect three conductors to it: phase, working zero and grounding .

It should be borne in mind that it is strictly forbidden to connect the ground wire to the working zero . Considering the enormous importance of the correct execution of all electrical work, it is recommended to entrust them to a professional electrician.

A instantaneous water heater is one of the most effective devices in case of a short-term outage of hot water supply . It has many advantages over other devices that perform similar functions. Such devices are convenient for use in city apartments and small country houses. Installation of water heaters is not particularly difficult and can easily be done with your own hands.

Why do you need a water heater at your dacha?

Not every one of us, when going on vacation, is ready to give up the benefits of civilization. Even in nature, you need a warm toilet and heated water for bathing. Organizing such conditions is not so difficult. A properly selected water heater for a shower in a country house can provide hot water supply. This solution has many advantages:

1. The presence of such a device allows you to take water procedures comfortably at any time
   of the day.
2. The existing assortment allows you to select a model whose technical parameters are ideal for each specific building
   (small log building, large brick house).
3. During operation, modern devices allow saving
   energy resources.
4. The water heats up in a very short time
   .
5. Such devices can be installed even where there is no water supply
   and a central gas main.
6. usually no problems
   . In addition, many sellers offer equipment installation services.

The reliability of such judgments can be assessed if, when purchasing a device, you take into account the technical potential of the site and correctly compare it with existing proposals. To do this, you need to learn to understand the assortment.

Compact models with shower Source acigaleclub.com

Volume of the tank

When we choose the volume of a water heater, it is important to decide on its location - on the wall, under the sink or on the floor. The maximum permissible size of the heater and, accordingly, the container depends on this.

The second criterion is the number of regular users and water consumption. Conventionally divided into the following categories:

• 10-30 liters ultra-compact - for the kitchen.
• 50-120 liters - family.
• 120-200 liters - large household ones.

For a more accurate calculation, use the following table:

Which company to choose

There is no clear answer to this question. There are many factors that influence which company to choose a water heater. The table below shows popular 80 liter models with a power consumption of 1.5 kW. Vertical type installation with lower communication lines. All have overheat protection.

You will notice that the selection is based on several criteria, ranging from price to warranty period.

Video description

The following video explains how easy pre-made titanium is to install:

Solar water heaters

Such devices heat the storage device using solar panels. They are assembled from long tubes made of glass. Inside, such elements are filled with special compounds. They enhance the absorption of the sun's rays and produce energy that can be used to heat the storage device. It is difficult to find a more environmentally friendly installation today.

But such a system has two significant drawbacks:

1. On days when the sun is densely covered by clouds, you may be left without hot water.
2. The profitability of installing solar panels is most often a big question mark, especially if hot water is needed at the dacha from time to time.

Installations that heat water using the sun Source legkovmeste.ru