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Home Technique Home Appliances The best instantaneous electric water heaters of 2023

The best instantaneous electric water heaters of 2023

Flow heater


  •  A flowing water heater is an inexpensive and convenient option for organizing hot water supply in an apartment, in a country house or in a private house.

  •  There is a wide variety of models, and so that you can choose the best one, I have compiled a rating of instantaneous water heaters in 2023. I will also tell you how to choose an instantaneous water heater, based on the strengths and weaknesses of this equipment.

15. Stiebel Eltron DDH 8

Stiebel Eltron DDH 8 electric instantaneous water heater

  • Power consumption: 8000 W
  • Net power: 8 kW
  • Dimensions (WxHxD): 220x274x95 mm
  • Installation: vertical with bottom connection (½')
  • Management: mechanical
  • Protection systems: safety valve, overheating

  •  The rating of instantaneous water heaters opens a compact device that connects directly to the electrical panel. To connect it, the house must have a copper three-core cable with a cross section of 6 mm² and a 40 A automatic machine.

  •  Stiebel Eltron DDH 8 can be installed in rooms with high humidity, including bathrooms and kitchens. According to customer reviews, with normal water pressure, the device works perfectly, its capacity is enough for washing dishes and taking a bath. There is a three-stage power adjustment. If the hot water tap is not fully open, the device will turn off, it has flow restrictions (approximately 1l / min).

Pros and conssuitable for a family of 2-3 people high-quality assemblypower adjustmenteasy installationprice

14. Electrolux NP6 Aquatronic 2.0

Electrolux NP6 Aquatronic 2.0

  • Power consumption: 5500 W
  • Net power: 5.5 kW
  • Maximum water temperature 50 °C
  • Dimensions (WxHxD): 191x141x85 mm
  • Installation: vertical with top connection (½')
  • Management: mechanical
  • Protection systems: from switching on without water, from overheating

  •  Inexpensive device that requires a minimum cable cross-section of 6 mm² and a 32A circuit breaker. It can be mounted on two screws or on a mounting plate.

  •  When water is supplied, Aquatronic 2.0 automatically turns on, when turned off, it turns off. Also, it will turn itself off when overheated or if the water is suddenly turned off. And thanks to its compact size, the water heater is easy to place even in a small room.

  •  According to the owners of the device, in the cold season it will not work to get very hot water from NP6 Aquatronic 2.0. It will be warm, which is enough for washing dishes or taking a bath for an adult. But if you like to soak in water from 40 degrees and above, it is better to consider another option in the top water heaters.

Pros and cons easy to use heats water well at one point of water distribution does not cope well with 2 or more points

13. Electrolux NPX 18-24 Sensomatic Pro

Electrolux NPX 18-24 Sensomatic Pro

  • Power consumption: 24000 W
  • Net power: 24 kW
  • Maximum water temperature 60 °C
  • Dimensions (WxHxD): 226x470x95 mm
  • Installation: vertical with bottom connection (½')
  • Management: electronic
  • Protection systems: from switching on without water, from overheating

  •  A solid and beautiful water heater with a self-diagnosis function and an indication of switching on and heating.

  •  Maximum productivity 11.5 l/min. makes this model suitable for all household tasks – from washing dishes to taking a bath and shower, and these tasks can be combined, including water at two points in the apartment at once.

  •  The water heater itself turns on when you turn on the water, and turns off with it. It maintains the set temperature, but sometimes it “floats” by 1-2 degrees, which is what many models sin.

Pros and consDesignEasy to connectEasy to set upNo

12. Zanussi Pro-logic SPX 7 Digital

Zanussi Pro-logic SPX 7 Digital

  • Connection side: top
  • Power consumption: 7 W
  • Maximum water temperature 70 °C
  • Dimensions (WxHxD): 122x208x70 mm
  • Installation: vertical with top connection (½')
  • Management: electronic
  • Protection systems: from switching on without water, from overheating

  •  An economical and inexpensive water heater operates with a capacity of 4 liters per minute, has an indication of switching on and heating, and temperature control with an accuracy of 1 degree.

  •  The manufacturer did not forget to build in the Pro-logic SPX 7 protection against overheating, and the device will automatically turn off when the water supply stops. It does not have a self-diagnosis function, like the previous model, but the price is much lower.

Pros and cons price compact size display no

11. Thermex Topflow 15000

Thermex Topflow 15000

  • Power consumption: 15000 W
  • Net power: 15 kW
  • Dimensions (WxHxD): 200x350x120 mm
  • Installation: vertical with bottom connection (½')
  • Management: electronic
  • Protection systems: from switching on without water, from overheating

  •  The unusual design of this model with round controls immediately attracts attention.

  •  The connection diagram is also interesting – three phases, and instead of zero, grounding. That is, for an ordinary apartment, such a water heater may not be suitable, but for an industrial premises – what you need.

  •  This device is characterized by high performance – up to 8.5 l of water per minute at 25 ° C or 6.2 l / min at 35 ° C and above, and also maintains a maximum water pressure of 10 atm.

Pros and cons

10. Atmor Basic 3.5

Atmor Basic 3.5 in the top 10 tankless water heaters of 2023

  • Power consumption: 3500 W
  • Net power: 3.5 kW
  • Maximum water temperature 50 °C
  • Dimensions (WxHxD): 270x310x100 mm
  • Installation: horizontal with bottom connection (½')
  • Management: mechanical
  • Protection systems: from switching on without water, from overheating

  •  The most budget model in the review of the best water heaters of 2023, and one of the most compact on the market. The "insides" are plastic, so that during the period of non-use, you can not remove the device from the cold water supply system.

  •  This "baby" works at a minimum water pressure of 0.3 atm and a maximum of 7 atm. With a small pressure of water, it helps to heat the water well, it will not be cold to wash. Ideal for a short period of hot water shutdown or for a short stay in the country.

Pros and cons easy to install it is inexpensive with a strong pressure of water does not cope with its heating

9. Thermex Surf 5000

Thermex Surf 5000

  • Power consumption: 5000 W
  • Net power: 5 kW
  • Dimensions (WxHxD): 135x194x80 mm
  • Installation: vertical (½')
  • Management: mechanical

  •  This is an inexpensive water heater that has protection against overheating and switching on without water. The heating spiral element is made of stainless steel, which guarantees its durability. It is allowed to place the device both with nozzles up and down.

  •  The main problem of Thermex Surf 5000 is that it works only at one point – the shower. According to user reviews, the capabilities of the device are quite enough for this. The unit comes with a shower head.

Pros and conseasy to connectautomatically disconnects if the flame goes outquiet mount works

8. Stiebel Eltron HDB-E 12 Si

Stiebel Eltron HDB-E 12 Si

  • Power consumption: 11000 W
  • Net power: 11 kW
  • Maximum water temperature 60 °C
  • Dimensions (WxHxD): 225x470x117 mm
  • Installation: vertical with bottom connection (½')
  • Management: electronic

  •  A solid model from a well-known manufacturer in terms of power reserve means that there is nothing to fear for the build quality. By the way, this column was made in Thailand.

  •  The HDB-E 12 Si is powered by a three-phase mains. The device has protection against overheating (turns off at temperatures above 60 ° C) and can supply hot water to several points at once. Productivity makes 5.4 l/min. IP25 moisture protection of the case allows you to place the water heater directly in the bathroom.

Pros and cons compact high build quality runs quietly price

7. Kospel KDH 18 Luxus

Kospel KDH 18 Luxus

  • Power consumption: 18000 W
  • Net power: 18 kW
  • Dimensions (WxHxD): 245x440x120 mm
  • Installation: vertical with bottom connection (½')
  • Management: mechanical
  • Protection systems: from overheating

  •  The device is made taking into account the peculiarities of water supply and works stably even with hard water. The tubular heating element is made of copper, strong and durable. On the front side of the water heater there is a power switch, with which you can set the full power or leave the device in economy mode.

  •  Another advantage of the model is the ability to work at several points of water consumption. Build quality, Polish.

Pros and cons build quality copes with 2 points – for example, with a shower and a kitchen at the same time price

6. Zanussi SmartTap Mini

Zanussi SmartTap Mini

  • Power consumption: 3300 W
  • Net power: 3.3 kW
  • Maximum water temperature 60 °C
  • Dimensions (WxHxD): 70x156x65 mm
  • Installation: horizontal with top connection (½')
  • Management: mechanical

  •  Among the best instantaneous water heaters, this device stands out for its elegant design with a large display that shows the current temperature. SmartTap Mini works with a small capacity (1.48 l / min), connects to a standard outlet.

  •  The heat exchanger of this model is made of stainless steel. The device is made qualitatively, has several protections, including:

  1. from overheating
  2. from switching on without water,
  3. from moisture (protection of the case according to the IPX4 standard).
Pros and consappearancepricehigh-quality assembly of stone adapters for different tapsshort cord – 1 metersuitable for only 1 water distribution point

5. Midea Infinity MIWH-3500C

Midea Infinity MIWH-3500C ranked instantaneous water heaters 2023

  • Net power: 20 kW
  • Combustion chamber type: open
  • Maximum water temperature 77 °C
  • Dimensions (WxHxD): 55x18x33 mm
  • Installation: vertical with bottom connection
  • Management: mechanical

  •  Need a flowing water heater, not more than 3000 rubles? Then pay attention to the model from Midea. It was made in China, but “not on the knee” of Uncle Liao, but soundly, no worse than other budget speakers. The case is made of fireproof (as the manufacturer assures) plastic, the heating element is copper.

  •  The performance of the column is small – 2,5 l / min, but sufficient for one water distribution point. There is an indication of heating and automatic shutdown in case of overheating. For an apartment or cottage, you can’t imagine a better option. The MIWH-3500C comes with a shower head with a hose.

Pros and consprice designeasy installation and managementno

4. Stiebel Eltron DCE-X 6/8 Premium

Stiebel Eltron DCE-X 6/8 Premium

  • Power consumption: 8000 W
  • Net power: 8 kW
  • Maximum water temperature 60 °C
  • Dimensions (WxHxD): 217x372x109 mm
  • Installation: vertical with bottom connection (½')
  • Management: electronic
  • Protection systems: from overheating

  •  A feature of this model is fully electronic control and high temperature accuracy in steps of 0,5 degrees.

  •  The model is suitable for Russian conditions (read – hard water) and has a moisture protection case, so that it can be placed in a shower or bathroom.

  •  The power of the device varies from 6 to 8 kW, the productivity is 4 l / min. The warranty is 2 years, which is not much, but the high-quality Thai assembly allows the DCE-X 6/8 Premium to work for at least 10 years.

Pros and cons compact easy to install high build quality large and bright display no

3. Teplodom i-MDH 9

Teplodom i-MDH 9

  • Connection side: Bottom
  • Power consumption: 9000 W
  • Net power: 9 kW
  • Maximum water temperature 55 °C
  • Installation: vertical with bottom connection (½')

  •  The Russian-made device is equipped with a magnesium-aluminum heat exchanger operating according to the “dry heating element” technology. That is, it does not come into contact with water, but is located in a metal tube. As the manufacturer assures, this not only allows you to heat water faster, but also provides a long service life – at least 10 years. The warranty is also generous – 3 years.

  •  The device cannot boast of any external advantages, neither the touch screen nor other features. Just a solidly made water heater – nothing more.

Pros and cons small size high-quality heat exchanger no

2. Kitfort CT

Kitfort KT tap water heater

  • Power consumption: 3300 W
  • Dimensions (WxH): 160×115 mm
  • Installation: vertical
  • Indication: on

  •  This is a super compact water heater designed to quickly heat cold water. It is mounted on the spout of the mixer using the couplings included in the kit.

  •  The LED display will let you know the current temperature, which is adjustable from 30 to 50 degrees. The device is equipped with an on indicator, has protection against overheating, and its case is protected from moisture according to the IPX4 standard.

Pros and consquick and easy installationgood performance – 6 liters per minuteinexpensive no

1. CLAGE CEX 9 E-compact

CLAGE CEX 9 E-compact the best instantaneous water heater

  • Power consumption: 8800 W
  • Net power: 8.8 kW
  • Maximum water temperature 60 °C
  • Dimensions (WxHxD): 177x294x104 mm
  • Installation: vertical with bottom connection (½')
  • Management: electronic
  • Protection systems: safety valve, from switching on without water, from overheating

  •  Answering the question of which water heater to buy according to the reliability rating and characteristics, I recommend an elegant model of a solid German assembly, designed for installation in a bathroom closet. To connect it, the cable cross-section must be at least 16mm², the automatic machine must be at least 40A.

  •  The CLAGE CEX 9 E-compact heating element is made of corrosion-resistant stainless steel. This partly explains the high price of the device.

  •  Please note that the remote control, which is indicated in the configuration of this model by some online stores, is actually an option.

Pros and cons easy installation high build quality high water heating rate price

How to choose a flowing or electric storage water heater for a summer residence and an apartment

  •  There are three types of water heaters: instantaneous, storage and indirect.

Flowing water heater

  •  The principle of operation of an instantaneous water heater, as the name implies, is to heat water from the pipe to the point of exit from the tap. The device is small in size, there are even tricky devices in stores that are mounted directly into the body of the tap – it will not be noticeable to the outside eye that you have a water heater installed.

  •  The advantage of an instantaneous water heater is speed. You don't have to wait for the water to heat up; just turn on the device, turn on the water – and it is already warm. In addition, it does not sour in the tank and is always fresh. Another plus of instantaneous water heaters is that they are inexpensive, there are electric ones, there are gas ones.

  •  But every coin has two sides, and an instantaneous water heater has its drawbacks. It can "serve" only one crane. The water will heat up to a maximum of 50° (unlike a boiler, where the standard heating is 75-80°). And to heat a continuously running stream of water, a lot of electricity is required – so much that one device will require a separate line leading to the switchboard to operate. And, of course, electricity will cost money. So, if you do not want to part with a bundle of money, you will have to take a shower at cosmic speed.

Storage water heater

  •  Among heaters, this is the most popular variety, and for good reason – it represents the optimal ratio of performance, cost and cost. The principle of operation of this device is extremely simple: water enters the tank (volume 10 liters or more), heats up to about 75-80 ° and is kept hot indefinitely. The volume of water remains unchanged – as it is consumed, a new portion automatically comes from the water supply system.

  •  Such water heaters are very economical – thick walls and insulation ensure that the water will lose precious heat very slowly. Again, it takes less electricity to heat a static amount of water than a constantly running stream of water. And another advantage of a storage water heater is that it can serve not just one tap, but all the taps in the house.

  •  There is only one inconvenience here: water will have to wait. However, in modern tanks, the technical waiting time is about two hours for 50-80 liters, and then only if you have drained almost all the hot water. And, of course, you will have to monitor the tank – about once a year or two, carry out maintenance, check for corrosion pockets and clean off limescale.

  •  As for the space occupied, there are now a lot of tanks for every taste and budget – traditional pot-bellied barrels for those for whom the issue of space is not important, to graceful slim women with a flat body. You can even mount them as you like – even vertically, even horizontally.

Read about these models in a separate rating of storage water heaters in 2023.

Indirect water heater

  •  Such an apparatus is "powered" from an already existing heat source – be it a boiler, or central heating pipes, or even the sun in especially environmentally friendly versions. Usually these are large, massive tanks with a heat exchanger coil, well insulated to prevent heat loss. The water will heat up slowly (it will take about 50 hours for 2 liters), but almost free of charge – after all, a separate power supply for such a tank is not required. As in the case of boilers, one such tank can serve several taps at once.

  •  However, the tank is not only large, but also requires complex installation and special placement – it must be near a heat source, otherwise it will not work.

Heating element type

  •  TEN – tubular electric heater. They are dry and wet. Wet ones are directly in the liquid, which reduces their service life – they can become scaled, plus there is a risk of corrosion. Dry ones are reliably protected by a flask, usually ceramic, and are more durable and reliable.


  •  It is usually made of thin metal, so you need to handle it carefully – a dent can easily appear. Many models are equipped with a glass or ceramic faceplate for beauty.


  •  The more the better, but up to a certain limit. For home use, equipment with a capacity of up to 8-11 kW is quite enough. Within a minute, it is able to heat about 4 liters of water.

Water pressure

  •  The standard for water pressure in pipes is 4 bar, but in practice (especially for the lower floors of urban apartment buildings) it can reach 8-10 bar. Based on this criterion, it is necessary to select a boiler; in extreme cases, it can be equipped with a pressure reducer.

Water protection

  •  This is not about internal water, but about external water, so to speak. If the water heater is installed everywhere except the bathroom, then, according to experts, IP23 will suffice. But if you decide to put a water heater in the bathroom, then you have to find a device with IP44.

Which water heater is better to buy in an apartment

  •  A city dweller experiences the pangs of weaning from hot water only once a year and at most for two weeks. A good option is an instantaneous water heater. Electricity bills in just a couple of weeks of use will not ruin you, the size of a small white box will fit in any apartment.

  •  But if the soul asks for reliability, reluctance to bother with a separate electrical connection line, and you also want to wash your hands and take a shower often, then, without a doubt, the storage device will provide maximum comfort.

Which water heater is better to buy in a private house

  •  A suitable option here is a storage water heater. It is inexpensive, voluminous, with low power consumption. Or, if you are a happy owner of a country house and live in it for long periods of time, as well as a lot of space in the house and a separate, constantly working heating system, you can think about indirect.