Hot water is a pleasure that the development of technology has brought to modern man. There are situations when, due to planned work in high-rise buildings, hot water supply may be turned off, and in some private houses such equipment is completely absent. Water heaters come to the rescue. In total, two types of such equipment have been invented: a boiler system and a flow-through one. A boiler means a volumetric tank with a heating mechanism, a flow-through one is installed on the water supply system itself and takes up little space. In the article, we will consider the principle of operation of a flow-through electric water heater, its types, pros and cons of equipment that are intended for houses and apartments. Also, the reader will be able to choose a suitable model of equipment, since the editors of the site "bestx.htgetrid.com/en/" present to your attention a rating of the best instantaneous electric water heaters for 2020.
Content
- 1 What is a flow-through electric water heater and the principle of operation of technology
- 2 Positive and negative qualities of technology
- 3 Criterias of choice
- 4 Types and characteristics of instantaneous electric water heaters
- 5 Rating of the best instantaneous water heaters for 2020
- 5.1 Instantaneous water heater Zanussi 3-logic 3,5 TS
- 5.2 Instantaneous water heater Thermex Surf Plus 6000
- 5.3 Instantaneous water heater Electrolux NP6 Aquatronic 2.0
- 5.4 Instantaneous water heater CLAGE CEX 9
- 5.5 Instantaneous water heater Thermex Stream 500
- 5.6 Instantaneous water heater Stiebel Eltron DDH 6
- 5.7 Instantaneous water heater Hyundai H-IWR2-5P-UI073 / CS
- 5.8 Instantaneous water heater Atmor In-Line 7
- 5.9 Instantaneous water heater Redring Powerstream 10
- 5.10 Instantaneous water heater EVAN V1-7.5
- 6 Installation and installation of a water heater
- 7 In custody
What is a flow-through electric water heater and the principle of operation of technology
Instantaneous electric water heater - equipment that heats water while it is moving. The main feature of the technique is its compactness, as well as the ability to heat water as quickly as possible.
The water heater looks like a small box that is connected to a pipe and electricity (there are also gas systems). Inside the box: heating system - heating element, control unit, heat pump, temperature sensor, water regulator. The mechanism of work is as follows:
- water enters the water heater;
- due to the heating element, water is heated to the required temperature
- hot water flows to the dispensing points.
Depending on the power of the device, the water can be heated up to 60 degrees. In practice, conventional and inexpensive models allow you to get hot water supply within 40 degrees, which, in principle, is the optimal temperature for everyday use.
In order for the water to always have a certain temperature, the equipment has to delay the flow rate. It is easy to fix this by purchasing a more powerful water heater.
In order to avoid mistakes when choosing equipment, the table below shows the approximate ratio of power, the amount of hot water dispensed and temperature.
| Hot water temperature when leaving the equipment | Equipment with a power of 4.5 kW (l / min) | Appliances with a power of 5.5 (kW l / min) | Equipment with a power of 7.3 kW (l / min) |
|---|---|---|---|
| 40 degrees | 2,4 | 2,9 | 4,0 |
| 45 degrees | 2 | 2,5 | 3,2 |
| 50 degrees | 1,8 | 2 | 2,9 |
| 55 degrees | 1,5 | 1,9 | 2,6 |
Depending on the water supply at the inlet, the data for the flow rate of the water, as well as the status of the hot water temperature, may change.
It must be understood that the more power the heater has, the more electricity it consumes.
Positive and negative qualities of technology
A flow-through water heater is ideal for an apartment, consider its pros and cons.
Positive traits:
- hot water comes out of one tap;
- does not require large installation requirements;
- hot water flows as quickly as possible;
- energy saving;
- heating allows you to disinfect the incoming water;
- compact;
- efficient and reliable;
- does not require large expenses during operation;
- can be installed by hand.
Negative qualities:
- the amount of water (the volume of the incoming flow) can be limited in various places, which does not guarantee constant hot water, in these cases it is better to purchase water heaters with a storage system;
- on average, for normal use of hot water, an average flow of 4 to 10 liters per minute is required, the low power of the equipment will not allow obtaining such a pressure, which leads to a decrease in the frequency of use and speed regulation;
- powerful heaters or several equipment in one place significantly increase the cost of electricity;
- such a technique is not suitable for premises in which many people live (kindergartens, large families) - the water simply does not have time to heat up or the pressure is too low;
- in practice, instantaneous water heaters cannot provide a stable water temperature.
Criterias of choice
What to look for when buying? Factors that will help you choose the best option are listed below.
- Safety.
Equipment of this kind has a certain security class - IP. This international scale allows you to understand the level of protection against the ingress of foreign bodies into the equipment and the degree of protection of the device against exposure to water. In total, there are two numbers in the scale, further in the table we will consider the values of each indicator:
| The first value is protection against foreign bodies and contacts | |
| 1 | Large objects equal to the size of the hand |
| 2 | Medium objects similar to the volume of a finger |
| 4 | Small foreign bodies less than one millimeter (wire) |
| 5 | Highest possible protection against any ingress of foreign objects |
| The second indicator is protection from water | |
| 0 | Not protected from water, requires additional equipment |
| 1 | Water droplets that can get onto the outside of the heater case |
| 3 | Protects from rain and splashes at a 60 degree angle |
| 4 | Fully splash-proof |
| 5 | Protects against any jet of water under different pressure. |
On the shelves of the store, depending on the price, you can find models mainly marked with IP24 or 25. These devices do not require special equipment for protection, but for the sake of practicality they are installed in a dedicated cabinet, which will increase the duration of the mechanism.
- Power.
The difference in power has been listed above. Before buying, it is better to make an approximate calculation of the water consumed in the family, and also take into account in which places the equipment is required. It is also necessary to remember the possibility of an electric current flow, a powerful water heater will not be able to work if the technical condition of the electrician is designed for a minimum consumption.
- Price and manufacturer.
The cost of the device depends on the power and the presence or absence of pressure. The brand must be selected not only by advertising in the media, but also by real customer reviews. The best manufacturers are Electrolux, AEG, Thermex, Kospel, Redring. Their pricing policy is different, so a preliminary analysis of the characteristics will help to answer the question of which company is better to buy the device.
Types and characteristics of instantaneous electric water heaters
In addition to the main characteristic of the equipment - the power of the water heater, the devices can be subdivided according to the presence of certain functions present in popular models. This list will help you understand what heaters are and make the right choice.
| Name | View | Description |
|---|---|---|
| Pressure mechanism | Pressure | Cuts into the water supply system (riser). Suitable for an apartment with many points of use |
| Free-flow | Designed to be used in one place. The set includes a hose and a watering can. | |
| A heating element | Heating element | A conventional heating element due to hard water and the corresponding appearance of scale puts the equipment out of order rather quickly |
| Uninsulated spiral | This type is much more practical and guarantees long-term operation of the equipment, but only in the absence of air congestion. | |
| Control type | Hydraulic | They are reliable, but to switch the water temperature, it is necessary to turn on an additional device located in the structure |
| Electric | Convenient to use, since for adjustment you need to select the appropriate mode on the panel or use a special remote control that automatically maintains the temperature | |
| By installation method | Horizontal installation | Depending on the size of the equipment and its technical type (pressure or gravity), the installation is carried out in accordance with the manufacturer's recommendations. But at the discretion of the owner, small changes can be made if this does not interfere with the operation of the water heater and water supply system. In some models, the kit already includes the necessary fasteners, you can also purchase a bracket yourself or put the equipment in a special protective cabinet |
| Vertical installation | ||
| Wall-mounted |
Equipment also varies greatly in size. There are very compact and oversized models. The size is determined by the width, top and depth.
Rating of the best instantaneous water heaters for 2020
The review is based on customer reviews, so the reader will be able to find out which heater is better to buy, as well as how much the device costs.
Instantaneous water heater Zanussi 3-logic 3,5 TS
The popularity of the model is due to its low price and high quality. The equipment capacity is 3.7 liters per minute. Designed for one point of water intake (for bath or kitchen), non-pressure mechanism. The maximum temperature of the dispensed water is 50 degrees. Mechanically operated. There is an indication of heating and switching on. Heating limitation set. Protected against overheating and switches off in the absence of water. The degree of protection against ingress of the international class - 4. Included: filter, tap, shower head, shower hose. Heating element - heating element. Dimensions: 270 * 135 * 100 mm. Weight - 1.5 kg. Average price: 2300 rubles.
Advantages:
- compact;
- easy to install and operate;
- produces fast water heating;
- low price.
Disadvantages:
- used for only one water distribution point;
- low-power.
Instantaneous water heater Thermex Surf Plus 6000
A type of non-pressure water heater of Russian production, which can be taken to the country and used in the absence of hot water supply. Can be used for multiple tapping points. The indicator shows the moment when the equipment is turned on. Protection system: from overheating and switching on without water. Protection against water: 4. Spiral electric heating element. Power - 6 kW. Dimensions: 130 * 180 * 68 mm. Weight - 1 kg. Average price: 5390 rubles.
Advantages:
- easy to use;
- fast heating;
- energy saving;
- compact.
Disadvantages:
- the bracket is very flimsy;
- separate power supply system.
Instantaneous water heater Electrolux NP6 Aquatronic 2.0
The popular electronics manufacturer presents the high quality electric water heater. One of the nicest models. Power - 6 kW. Produces 2.8 liters per minute. The maximum temperature is 60 degrees. The control is carried out mechanically. Protected against overheating and turns off when there is no water in the water supply system. International class protection level - 4. Wall mounting method. Dimensions: 191 * 141 * 85. Weight - 1.42 kg. Average price: 6520 rubles.
Advantages:
- heats well;
- strong pressure;
- famous brand and proven quality;
- easy to install and operate;
- relatively low price.
Disadvantages:
- not found.
Instantaneous water heater CLAGE CEX 9
Productivity - 5 liters per minute. The maximum hot water temperature is 55 degrees. Power - 8.8 kW. Functionality: protection against overheating and water, there is a temperature sensor, there is an electronic display, a control panel, with a system self-diagnosis function, and there is also a limitation on water heating. Filters for cleaning are included. High degree of protection against water ingress - 5. Spiral electric heating element made of stainless steel. Weight - 2.7 kg. Dimensions: 180 * 294 * 110 mm. Average price: 24,500 rubles.
Advantages:
- fast heating of water;
- electrical control;
- high quality heating element;
- multifunctional;
- good pressure.
Disadvantages:
- overcharge;
- high power consumption.
Instantaneous water heater Thermex Stream 500
Water heater for one water distribution point. Power - 5 kW. Management - mechanical, there is a power indicator. Wall-mounted installation method. The kit includes: faucet, shower head, shower hose. Dimensions: 160 * 260 * 95 mm. Average price: 3260 rubles.
Advantages:
- budget price;
- 3 power levels;
- oversized;
- copes well with heating water.
Disadvantages:
- suitable for only one point;
- high power consumption.
Instantaneous water heater Stiebel Eltron DDH 6
Pressurized water heater for several water distribution points. Produces up to 3.5 liters per minute. The control is carried out mechanically. Shows a special indicator of inclusion and the moment of heating. There is also a limitation on the heating temperature. The highest degree of protection against water - 5. TEN - heating element made of material: copper. Power - 6 kW. Weight - 1.9 kg. Dimensions: 220 * 274 * 95. Average price: 14,000 rubles.
Advantages:
- heats water well;
- long-term use guarantee;
- high degree of protection;
- great pressure.
Disadvantages:
- not very powerful.
- overcharge.
Instantaneous water heater Hyundai H-IWR2-5P-UI073 / CS
Productivity - 3.6 liters per minute, power consumption: 5.5 kW. The water heater control is mechanical. There is a limitation of the heating temperature. The set includes a water filter. The degree of protection against water - 4. Mounting method: wall. Complete set: faucet, shower head, shower hose. Dimensions: 248 * 153 * 95 mm. Weight - 1.16 kg. Average price: 2430 rubles.
Advantages:
- low price;
- heats well;
- quality.
Disadvantages:
- suitable only for one object;
- requires additional eyeliner;
- poor pressure.
Instantaneous water heater Atmor In-Line 7
Pressure water heater with a capacity of 6 liters per minute. Power - 7 kW. Suitable for multiple water points. The control is carried out mechanically. Protected against switching on in the absence of water and overheating. The heating element is made of copper, the number of internal elements is 2 pieces. Dimensions: 317 * 305 * 125 mm. Average price: 3700 rubles.
Advantages:
- easy to use;
- fulfills the manufacturer's requirements;
- powerful;
- inexpensive for the price.
Disadvantages:
- consumes a large amount of electricity;
- often requires minor repairs after 1-2 years of use.
Instantaneous water heater Redring Powerstream 10
Pressure electric water heater that can supply hot water at several points. The maximum temperature reaches 60 degrees. Productivity is up to 7 liters per minute. Overheating protection installed. The heating element is spiral. Electricity consumption for 100 liters of water (t-44 ° C) - 3 kW. Dimensions: 307 * 160 * 74 mm. Average price: 13,500 rubles.
Advantages:
- heats water well;
- strong pressure;
- powerful.
Disadvantages:
- no external switch for water temperature;
- high price.
Instantaneous water heater EVAN V1-7.5
Pressure heater for several water points. Productivity - 3 liters per minute. Management is mechanical. An indication is installed that notifies the device is turned on. There is overheating protection as well as temperature limitation. Water protection degree - 3. Heating element - stainless steel heating element. Dimensions: 645 * 250 * 180 mm. Average price: 14,000 rubles.
Advantages:
- heats water quickly;
- easy to operate;
- reliable.
Disadvantages:
- overall;
- high price;
- noisy switches.
Installation and installation of a water heater
According to manufacturers' recommendations, the best way to install electrical equipment is to use the services of a professional. However, the design and mechanism of an electric water heater are not very complicated, and all devices have an installation diagram, so you can install it yourself. It is worth knowing that do-it-yourself installation of equipment and subsequent breakdown leads to the loss of warranty service rights.
- Installation of a water heater. Initially, you need to decide on the location of the equipment. This is usually a wall next to the faucet to minimize heat loss. The weight of the equipment is small, so ordinary brackets will do.
- Water connection. Depending on the type of equipment, the water heater is connected either directly to the cold water supply or to pipes. In accordance with the installation diagram, it is necessary to connect the equipment, even the smallest deviations from the rules can disrupt the operation of the mechanism and lead to quick breakdown. Manufacturers also recommend installing additional water purification filters.
- Supply of electricity. Conventional water heaters are simply plugged into the network. The main thing is that the load on the power grid is correctly calculated. In the operating instructions, you prescribe the maximum power consumption of the equipment.
In custody
An electric instantaneous water heater is a convenient mechanism for heating water in any living conditions. There are pressure and non-pressure heaters, which differ from the number of use of water consumption points. If DHW is needed only in one place, for example, for a kitchen, then one not too powerful gravity water heater will be enough. If the operation of the equipment takes place in a large family and at several points of analysis, then a rather powerful pressure mechanism is needed.
The main advice of this article: calculate the amount of water consumed and clarify the strength of the network voltage, it is on the basis of these indicators that the choice is made.
Thanks to the presented rating of quality brands, each buyer will be able to choose the best option for a water heater, depending on the price and manufacturer. If you purchased one of the products described in the rating, or use another brand of heater, then share your opinion in the comments.
