Supply interruptions hot water, especially in the summer, happen with enviable constancy. To solve this problem, many are forced to equip an autonomous source of hot water in their apartment. Quite often, our choice stops at a flowing electric water heater. Of course, you need to decide which instantaneous water heater is better and how to choose the right model.
The instantaneous pressure water heater under the sink is invisible and usefulThese units are distinguished by their small size, low power consumption, and in terms of efficiency they are no worse than storage-type modifications. In such devices, the liquid is instantly heated and you can not be afraid that, when taking a shower from the horn, you will find yourself under a cold stream of water, because the hot one has ended in the storage tank.
How does an instantaneous water heater work?
Instantaneous water heater is a plastic or metal casing, inside of which is a tubular electrical heating element(TEN). The principle of operation of an instantaneous water heater is not complicated: the cold water entering the inlet of the apparatus, in contact with the heating element, acquires the desired temperature at the outlet. Energy is consumed only during the operation of the device. The best instantaneous water heaters have the following advantages:
- low weight and overall dimensions;
- the possibility of placing in any convenient place;
- unlimited amount of heated liquid;
- electricity consumption in interval mode;
- small price.
Internal organization instantaneous water heater - example modern technologies It must be understood that the more often the water heater works similar design, the greater will be the cost of paying bills. Basically, it depends on the number of people living in the apartment, the location of the water intake points, and so on. The best low-power flow heaters used in the country are very economical.
Which is better: electric or gas water heater?
Flowing water heaters, depending on the energy source used, are divided into electric and gas. The principle of operation is essentially the same, so you need to choose a source of energy. Asked if it's better geyser or an electric water heater, there is no clear answer: each unit has its own advantages and disadvantages.
Price gas fuel below, but gas water heaters require equipment exhaust ventilation with a chimney and compliance with a number of fire safety requirements.
The geyser requires a special permit from the relevant authorities, which means that do-it-yourself installation is prohibited, and a certified specialist is needed.
In addition, the geyser requires constant Maintenance, and for the operation of the unit, it is necessary to have a constant working pressure in the gas line. They have large overall dimensions, have restrictions on the installation site and burn oxygen.
A small size instantaneous water heater will harmoniously fit into any interior Instantaneous water heaters, which are powered by electric current, are much safer to use. Their installation is not difficult and can be done by hand. It should be borne in mind that powerful models have an increased load on the electrical wiring, so a safe connection should be provided. These units are compact in size and can be installed anywhere.
What is the difference between pressure and non-pressure models
Non-pressure models are distinguished by the fact that the internal pressure in the system is close to atmospheric. Pressure modifications are always under pressure from the fluid of the water main. Non-pressure water heaters do not have high power, as a result, they heat water weakly and are used mainly as auxiliary devices for hot water supply, they work great in summer cottages.
The water heater can be built right into the faucet The package of non-pressure models, designed to service one water intake point, includes a shower hose, watering can or faucet. Units of this type do not exert an increased load on the electrical network to which they are connected, so in most cases it is not necessary to replace the wiring with a more powerful one. This is again convenient for giving. Non-pressure models are always installed after a tap or faucet that blocks water access.
Instantaneous water heater option with tap Pressure water heaters are mounted directly in the wiring water supply network and can serve several water points at the same time. Most often they are installed under the sink, hung on the wall or placed behind the door. kitchen furniture. These units can maintain a constant temperature of the heated water and automatically turn on when the tap is opened.
Connecting water heaters
Water heaters are connected to utilities for water supply and electrical energy. At the same time, there are differences in the wiring of pressure and non-pressure models, but grounding must be done in any case. Non-pressure water heaters are much easier to connect to a water source.
The water heater under the sink takes up very little space Pressure units are connected to two water supply lines, through which hot and cold water is supplied. In almost any case, it will be correct to equip the power supply with a separate line, since overloading the existing wiring is unacceptable, and all safety requirements must be observed. Electrical installation water heaters operated in rooms with high humidity must be carried out especially carefully.
Connecting a non-pressure model to a water source
The installation of an instantaneous water heater always starts with hydraulic installation, because it is necessary to squeeze out air pockets and fill its body with water. Connecting a non-pressure model to a source of cold water is not difficult and can be done by hand. The device is mounted through a gasket that has dielectric properties and is included in the device package.
Heated shower head - another instantaneous water heater option A mixer or shut-off valve must be present at the heater inlet. This is necessary so that in the container in which the liquid is heated to the desired temperature, pressure is not created for which it is not designed.
If a shut-off valve is connected at the outlet of the water heating device, a container rupture may occur, since the automation that controls the workflow does not monitor the pressure of the liquid at the place of its heating, but controls its presence or absence only at the system inlet.
The supply of hot water coming from the water heater is carried out through a long hose with a shower arm or gander. It is not possible to replace the faucet or spiral hose supplied with the unit, as they are specially designed for the required heating and economical water consumption. During operation, it is necessary to exclude the ingress of water splashes on the unit and the provision of external mechanical impact on it.
Connecting a pressurized water heater to the water supply
Pressure execution of a water heater provides connection to a water supply system in a section of pipeline system. A tee is used, installed to the nearest pipe branch. In order to be able to turn off the unit with a centralized supply of hot water, liquid shut-off valves are installed on the inlet pipes.
Connecting a pressurized instantaneous water heater to a faucet In addition, their presence helps to remove the device for repair or replacement without blocking the center line. Before the tee it is better to install a filter for cleaning tap water, since its quality in the vast majority of cases can lead to a reduction in the life of the device.
Electrical installation
The electrical installation of the instantaneous water heater is carried out after it is fixed in the selected place and the device body is filled with water. Low-power models can be plugged directly into an outlet. If the apartment has electric stove, the cable that feeds it is activated.
Wiring diagram for connecting instantaneous water heater For some powerful units, three-phase network equipment with a nominal voltage of three hundred and eighty volts is required. In all cases, it is imperative to provide for the implementation of high-quality grounding. In addition, it is necessary to have a device protective shutdown, which interrupts the operation of the unit in the event of a danger of human injury electric shock. Detailed instructions about connecting RCD you will find in the article
Control options for water heaters
The efficiency of their functioning largely depends on the quality of control of water heaters. There are the following implementations of this function:
- Devices using hydraulic type automation. In this case, a special sensor is located at the system inlet, which controls the appearance of the flow of sheath fluid and turns on the heating element. The disadvantage of this design is that it connects only one level of heating power. In some models, it can be changed manually by push-button switching.
- Using an electronic microprocessor. It controls the operation of the heater using monitoring sensors and allows you to maintain the same temperature regime of the heated liquid.
Hydraulic control makes it possible to obtain an increase in the temperature of the serviced liquid only by a certain amount. Which one depends on the power of the tubular electric heating element. It is believed that the temperature of the water at the entrance varies from twenty to twenty-five degrees.
It turns out that in summer the hydraulic control allows you to provide hot water, but in winter the unit may not be able to cope with heating too cold water.
Electronic control allows you to maintain the desired temperature of the heated liquid, regardless of the time of year. Such units are much more expensive and have more power, as a result, they require a separate connection line and mandatory installation protective shutdown devices.
Determining the required capacity of an instantaneous water heater
The power of an instantaneous water heater is its most important operational parameter. It determines the amount of hot water heated by the unit for a certain period of time. A low-power unit is able to heat about five liters of water within a minute, enough for cooking dinner or taking a shower.
The power of an instantaneous water heater required to meet the demand for hot water can be simply determined by dividing this parameter by half. The result obtained will show quite accurately how many liters of liquid, the temperature of which will increase by approximately thirty degrees, will be consumed in a minute interval. For example, a unit with a capacity of eighteen kilowatts will provide an output of nine liters of hot water per minute.
By determining the daily consumption of hot water depending on the number of people living in the apartment, you can easily calculate the required capacity of the instantaneous water heater. It increases by about one and a half times if a bath is taken instead of a shower, and there are many water intake points.
Depending on the design and purpose, the power of the water heater will be different. In practice, in the case of using a non-pressure water heater with a tap, a power of 3.5 kW is sufficient. If you need to heat water only for the shower, choose a device with a power of 5 kW. When possible use at the same time a shower and a tap, it is better to purchase a water heater with a capacity of 7 kW.
Assessment of possible water consumption
The possible water consumption is estimated depending on the size of the family living in the apartment, the presence or absence of a bathroom, and so on. What will be the average water consumption for an average family of three? Let's try to figure it out.
Taking a shower, an adult man spends about fifteen liters of hot water, a woman, on average, ten liters more. Adding here morning hygiene procedures, washing dishes and hands, we get that a family of three will spend about a hundred liters of water. At the same time, thirty liters will be enough for one person.
Real offer on store shelves
On the modern market there is a huge variety of modifications of instantaneous water heaters, both pressure and non-pressure. Actual offers of pressure models can be compared with the help of the following table.
| Table of characteristics of instantaneous water heaters | ||||||
| Name of the water heater | Number of points | Powerful, watt | Dimensions, mm | Productivity, l/min | control type | We stand, % |
| Electrolux Smartfix 2.0TX | 1 | 6500 | 270x135x100 | 3,7 | hydraulic | 100 |
| Thermex System 800 | 1 to 3 | 8000 | 270x95x170 | 6 | hydraulic | 160 |
| Electrolux NPX 8 Flow Active | 1 to 3 | 8800 | 226x88x370 | 4,2 | electr | 490 |
| AEG RMC 75 | 1 to 3 | 7500 | 200x106x360 | 1 to 3 | electr | 510 |
| Evan W1-9.45 | 1 | 9450 | 260x190x705 | 3,8 | mechanical | 530 |
| Stiebel Eltron DHM3 | 1 to 3 | 3000 | 190x82x143 | 3,7 | hydraulic | 660 |
When choosing a specific device for a house or apartment, it is necessary to take into account the totality of all operating parameters. The most important part of an instantaneous water heater is the tubular electric heating element. For long-term trouble-free operation of the unit, it is necessary high-quality protection this part from direct contact with the heated liquid. Other structural elements in contact with water must be made of brass, copper or stainless steel.
The body of the instantaneous water heater during operation is exposed to high temperatures, aggressive chemical components in the composition of the liquid flowing through it, therefore it is made of a chemically and mechanically strong material. Materials such as copper and polypropylene have proven themselves well, the cases made from them are distinguished by a long service life.
It is convenient to install such a kit instead of a regular crane. An important factor is the convenience of using the unit for all family members. It is very important to ensure the safety of operation, you need to choose a device with an overheating protection function, complete it with a filter for water purification. It will be useful to have an indication of inclusion, a scoreboard on which the temperature of the heated liquid is displayed.
With the absence and interruptions of hot water, preventive and repair work heating systems are faced by most urban residents. Do you want to forget about this problem forever? To do this, you need to buy a good instantaneous electric water heater. Water heaters are divided into flow and storage. The former are compact in size and heat water instantly, while it passes through the internal elements of the device. This method of heating is more efficient, but more energy intensive. As for storage water heaters, they have a large capacious tank in which water of the required temperature is located. Which water heater is better flowing or storage depends on the specific purpose of the household appliance.
To find out which instantaneous water heater is better to choose, we have compiled a review of the TOP 7 best electric instantaneous water heaters.
Water heater Zanussi 3-logic 3.5 S (shower)
Which instantaneous water heater is better to buy? We recommend that you pay your attention to the Italian company for the production of household electrical appliances - Zanussi.
Flowing electric water heater with a capacity of 3.7 liters per minute. The maximum water heating temperature is +50 0 C. Consumers will also be pleased with the adequate cost of the unit - $30 .
Water supply is carried out in a non-pressure way with one point of water intake. Mechanical control of all settings and functions. On the body there is a light indicator for turning on the device and heating water. There is also a limitation certain temperature heating. The tubular electric heater (TEH) consists of copper and consumes power of 3.5 kW.
The security system consists of 4 degrees of protection against ingress of water and pollution, automatic shutdown of the device without water, protection against overheating. The set includes a shower head, a durable shower hose, a water filter.
The disadvantages include: high flow electrical energy, non-pressure water supply, required special fasteners, insufficiently reliable design.
Water heater Hyundai H-IWR1-3P-CS
You can also buy a good instantaneous water heater from the concern Hyundai, which produces not only cars, but also climate equipment, as well as a variety of household electrical appliances, including instantaneous electric water heaters.
A device with a maximum water heating temperature of +85 0 C and a heat exchanger capacity of 3.5 kW. The water unit is controlled mechanically. The built-in indication of the inclusion of the heater will prevent accidental start of the device without water.
Long service life of the device will ensure a reliable and durable design. Safety: 4 degrees of protection against moisture, protection against overheating.
The package includes a filter for water purification, a shower faucet and a nozzle for it, a shower hose. Low cost water heater ( $37 ) makes it available to almost every buyer.
The weak point of the model is a small power (3.5 kW), a short network cable (1.5 m), there is no indicator for turning on the heating, a rather rigid hose for the shower head.
Water heater Timberk WHEL-3 OS
The company from Scandinavia for the production of the best instantaneous water heaters - Timberk known not only to the contingent of engineers and builders, but also to ordinary homeowners.
Model with a capacity of 1.9 liters of water per minute and a fairly high power of 3.5 kW. One point of water intake (non-pressure). The electric flow unit is controlled mechanically.
This robust design is ultra-sensitive to supply water temperature. The device requires water with an outlet temperature of 15-20 0 C. In view of this, Timberk WHEL-3 OS is designed for use in the summer.
The protection system consists in the presence of a safety valve, in limiting the heating temperature, in protection against overheating of the copper heat exchanger, as well as 4 degrees of protection against moisture ingress.
The package includes a shower head-watering can and a shower hose for it, a filter for water purification. The cost of this household appliance is minimal - only $43 .
To weaknesses can be attributed to low productivity (1.9 liters of water per 1 minute), non-pressure water supply, cannot be used in winter time of the year.
Water heater Ariston Bravo E 7023 U-F 7
The main characteristics inherent in household electrical appliances for the home from the popular Italian brand Ariston are stylish design, excellent basic set functions and inexpensive price (this model costs $64
).
One of the best instantaneous electric water heaters has good performance - 4 liters of water per minute and high power - 7 kW. Pressure water supply (several points of water intake). On the case there is an indicator of turning on the device. The spiral heating electroelement provides the accelerated heating of water.
The safety system is equipped with a protective automatic shutdown mechanism in case of power failure, thereby preventing the danger of electric shock. Overpressure safety valve, overheat protection function.
The package includes a faucet, a shower head, a filter for water purification.
This model is not deprived of disadvantages: poor thermal insulation, installation of special electrical wiring with grounding is required.
Water heater Electrolux NPX6 Aquatronic Digital
You can buy a good instantaneous water heater for a fairly affordable price - $157
. This flowing Swedish electric water heater has a capacity of 2.8 liters of water per minute and a power of up to 5.7 kW.
The digital display located on the case will allow you to set the necessary settings. Built-in function of smooth limitation (control) of the water heating temperature (especially relevant for families with small children).
The protection system includes protection against overheating and 4 degrees of protection of the spiral heating element against water ingress (anti-corrosion coating protects against oxidation, ingress harmful substances and breakdowns).
The compact size of the device allows you to install it even in a small kitchen, small bathroom or use in the country.
The disadvantage of the model is low productivity (2.8 liters per 1 minute).
Water heater Stiebel Eltron DHB-E 13 SLi
A three-phase instantaneous electric water heater from the German reputable manufacturer Stiebel Eltron is associated with reliability, high quality and corresponding cost $831
.
To the question “Which instantaneous water heater is better?” the answer is unequivocal. The Stiebel Eltron DHB-E 13 SLi model has a spiral-shaped plastic heat exchanger and consumes 14 kW of power. Maximum water heating - up to +60 0 С.
Convenient and simple electronic control, built-in self-diagnosis of faults, function-indicator of turning on the device and the beginning of water heating. There is also a water temperature limiter.
The protection and safety system consists of 5 degrees of protection against ingress of water and "air", automatic protection against overheating.
Cons of a water heater - its high cost, high flow electricity.
Water heater AEG DDLE 18/21/24 TrermoDrive
Well-known German company AEG engaged in the production of household electrical appliances and power tools from 1887 to 1996. AT given time only the popular brand survived.
Instantaneous electric water heater AEG DDLE 18/21/24 TrermoDrive with a capacity of 12.3 liters of water per minute and a maximum water heating temperature of +60 0 C. Very high power consumption - up to 24 kW. Several connected points of water intake (pressure). The average cost of an electric water heater is about $1020 .
Convenient, electronic control is carried out using a remote control. The display will show all the necessary settings: temperature (built-in thermometer), time, self-diagnosis of problems. There is an indicator for turning on the device and its heating, as well as limiting a certain heating temperature. The spiral heating electric inner element is protected by 5 degrees from water.
Additional functions: there is an ECO mode button, automatic water consumption, a built-in shower program. This best instantaneous electric water heater is also suitable for heating solar panels(up to 60 0 C at the inlet).
The disadvantage is the rather high cost of an advanced unit.
If there is electricity in the house, apartment or dacha, provide for the family hot water not difficult at all. The market offers an exceptionally wide selection heating appliances for heating tap water.
Storage boilers are considered the most popular, but flow models have their fans. To figure out how to choose a flowing electric water heater, you should study the features of the operation of this device.
The design of an instantaneous water heater is very simple. This is a flask for water, in which a powerful electric heating element made of copper is installed. Additionally, there is a control unit, with its help you can configure the functioning of the device as needed.
The water flow enters the flask, where it is almost instantly heated to the desired temperature and supplied to the distribution points. More powerful models allow you to heat the flow up to 60 degrees, and less powerful ones - up to about 40 degrees.
The photo clearly shows the device of a household electric instantaneous water heater, in which the role of the heating element is performed by a high-power heating element.
The spread of characteristics of instantaneous water heaters in terms of power is quite wide, it varies between 3-27 kW. Devices with a power of up to 8 kW can be safely connected even to an ordinary single-phase 220 V socket, although electricians still recommend that a separate line be drawn from the meter for this powerful device.
High-power heaters can only be connected to a three-phase 380 kW electrical network, which is usually equipped with houses with electric stoves.
If you need to connect a powerful heater, and confidence in your reliability electrical network No, you should consult an experienced electrician. Sometimes the network can be modified, but this is not always possible.
Advantages and disadvantages of "protochnik"
Among the advantages of flow heaters, several points should be noted:
- Usually these are compact devices, it is easier to find a suitable place for them.
- A separate tank is not required to obtain a stable flow of hot water.
- Electricity is consumed only during the operation of the device.
- The device is not difficult to install and operate.
- Installation does not require a chimney.
- The operation of the device does not depend on the characteristics of the supply and exhaust ventilation.
But when choosing an instantaneous water heater, you should also remember about its shortcomings. To begin with, “protochniki” consume quite a bit during operation. a large number of electricity, which is inevitably reflected in utility bills.
In addition, the quality of heating will depend on how many hot water consumption points the heater serves at the same time. If there are many such points, and the power of the device is not enough, there will be too little water, or it will not warm up fast enough.
Instantaneous water heaters are compact in size, which greatly facilitates their installation. When installing, it is important to comply with the requirements for power supply characteristics.
High power consumption requires appropriate operating conditions. Installation of a device with a power of more than 8 kW is possible only to a modern three-phase electrical network.
Unfortunately, old houses are not always equipped in this way. In such conditions, installation of flow heaters with a power of up to 6 kW is allowed. You can clarify the features of your electrical network in the housing office or with a local electrician.
The condition of the wiring in the house also matters. Of course, it must be correct. It is recommended to use high-quality copper wire for such powerful devices as flow heaters.
The cross section of the cable must correspond to the power of the device. On this issue, you can also consult with a good electrician.
Low-power devices have a significant drawback: they are convenient for operation only in the warm season, when the temperature of the water coming from the water supply is at least 15 degrees. A low-power device can raise the temperature of the water by another 25 degrees, i.e. up to a very comfortable 40 degrees.
If for some reason the water supplied to the heater does not have time to warm up to the desired level, the quality of heating will be unsatisfactory.
There are instantaneous water heaters that are installed directly on the sink. In this case, there is no need to bring separate hot water pipes to the sink.
Attempts to connect a device designed for a three-phase network to a conventional 220 V electrical network can be fatal for an instantaneous water heater, and for electricians, and even for people. Do not take risks and arrange an electrical accident in the house. A network with the necessary characteristics can be connected to a private household, a summer house or a cottage.
To do this, contact the local power supply company and obtain a special permit - specifications to connect the electrical installation.
You can get acquainted with the features of connecting and operating an Electrolux electric instantaneous water heater with a power of 3.5 kW in the following video:
What you need to know about the types of flow heaters
Although manufacturers offer big choice flow type water heaters, according to the type of installation and features of operation, they can be divided into two large groups: pressure and non-pressure.
Pressure models are mounted in the water supply riser, they are designed to simultaneously provide hot water to several points of consumption.
Pressure-type instantaneous water heaters are connected directly to the water supply system of a house or apartment. They can serve several points of hot water consumption at once.
The device is equipped with an inlet for cold water and an outlet for hot water, from which water is supplied through pipes to the places of consumption.
Thus, if with the help of a flow heater it is supposed to provide hot water to the entire apartment or the whole house, it makes sense to opt for a pressure water heater.
Non-pressure instantaneous water heaters are usually characterized by low power, moderate price and high popularity. The device is equipped with special attachments, such as a shower head
Non-pressure devices are used in cases where only one specific point of consumption needs hot water. Usually this is a shower or bath, a sink in the kitchen, etc.
The device is installed in close proximity to the point of hot water consumption, cold water enters through the inlet pipe, and hot water is supplied through a special nozzle, for example, through a shower head. Heaters of this type are a popular choice for summer cottages.
Device selection: what to look for
Before you go to the store, you should decide on a number of indicators that characterize the operation of the water heater:
- The number of consumption points to which heated water will be supplied.
- The total volume of water that will be consumed per unit of time when switched on simultaneously at all points of consumption.
- The power of the device, which will provide sufficient heating temperature.
In addition, a number of questions should be clarified already in the store:
- The level of complexity of the installation of the device, which can be carried out independently or with the help of a specialist.
- The cost of installing a heater (sometimes you can get a discount or even free installation services).
- Availability and cost of spare parts that may be needed in the event of a product breakdown.
- Duration of the warranty period.
- The procedure for warranty service.
The last point is very important, because sometimes it is quite difficult to get a warranty repair service from a little-known manufacturer, despite the fact that the warranty is provided. Center for warranty repair, may be located in a neighboring city, region, or even in another country.
The maximum amount of hot water that the device can produce per unit of time depends on the heater power. Low-power appliances can supply two to six liters of water per minute. The actual heating when using such a device usually takes only 20 seconds.
Usually this amount of water is enough to quickly take a shower and wash the dishes. If the needs of the residents of the house exceed these figures, a more powerful water heater will be needed.
Using this diagram, it is not difficult to determine what level of hot water a family needs for comfortable living in the house
To find out your family's need for hot water, you can make simple practical calculations using a bucket of known capacity, for example 8, 10 or 12 liters. Water is let in with the usual pressure and the time during which the bucket is filled is noted.
Dividing the number of liters by the number of seconds obtained and multiplying the result by 60 determines the need for hot water for this particular point of consumption. You can immediately divide liters into minutes so that you do not have to additionally multiply by 60, but if the number of minutes is not an integer, you should correctly convert additional seconds to tenths / hundredths of a minute. For example:
1 min. 30 sec. = 1.5 min.
45 sec. = 0.75 min.
2 minutes. 15 sec. = 2.25 min. etc.
The same practical measurements and simple calculations should be carried out for each hot water consumption point, and then summarize the result.
Information about the performance of an instantaneous water heater is contained in the product data sheet, and this indicator is also usually indicated in the product description on the websites of manufacturers, online stores, in brochures, etc.
To determine the power of an instantaneous water heater, you can use a completely scientific formula that uses data on the need for a point of consumption / house / apartment in hot water. Calculate the power of the device according to the following formula:
P \u003d Q × (t 1 - t 2) × 0.073, where:
P— power of instantaneous water heater, W;
Q- the required flow of hot water, l / min .;
t1- the required temperature of hot water supplied to the point of consumption, 0 С;
t2 is the temperature of the water entering the heating device, 0 С;
0,073 - correction factor.
Here is an approximate calculation of the power of an instantaneous water heater for a conditional situation when the hot water consumption level is 15 l / min, the outlet water temperature should be 400C, and the operating water temperature at the inlet is on average 100C.
In this case, the power of the instantaneous water heater should be P = 15 × (40-10) × 0.073 = 32.85 kW. This is a fairly high power, the purchase of such a device will cost a lot.
Before choosing a suitable instantaneous water heater, you should evaluate the upcoming costs not only for its purchase and installation, but also for further operation.
The higher the power of the device, the more electricity is consumed during its operation, but the higher the water temperature that can be obtained using such a device. It all depends on the needs and specific conditions.
For example, if in the country house hot water is needed only for washing dishes or for taking a shower, a model with a power of up to 8 kW is sufficient. Such a device is quite enough to solve these small household tasks.
If hot water needs to be provided big house especially throughout the year, not just in summer period, you will have to consider devices with a power of 18 kW.
It is also worth evaluating the location of hot water consumption points. Usually, if the shower stall and the kitchen are nearby, it is possible to use one low power device for these two points.
True, hot water will be supplied to only one consumer: either in the shower or in the kitchen.
The diagram clearly demonstrates the features of installing an instantaneous water heater. It is worth deciding on the location of the device and the order of its connection even before purchase
If funds allow, you can increase the comfort in the house with the help of two small-capacity water heaters. One is placed in the kitchen, and the other is in the bathroom or in the shower.
They do not take up much space, so having two devices will not create big problems. For a shower, it makes sense to buy a water heater equipped with a block remote control. However, the device can be placed directly in the shower.
Such devices are usually designed to work in conditions high humidity, so he is not afraid of splashes.
Some models of instantaneous water heaters are equipped with a remote control unit. Such devices are very convenient to use in the shower.
What is the price?
It should be noted that in Russia flow heaters Termex, Electrolux, etc. are considered the most popular. Models of the well-known company Bosch are traditionally of high quality.
Among Electrolux devices, the Smartfix 5.5 T, Smartfix 6.5 T, Smartfix 2.0 6.5 T models with a power of 5.5-6.5 kW are very popular. The cost of such devices ranges from 50-70 dollars.
Popular instantaneous water heaters from Termex include the Stream 350, Stream 500, Stream 700 models, their power is 3.5 kW, 5.0 kW and 7.0 kW, respectively. The price varies approximately within the limits of 80-100 dollars.
If you need to pick up a high-power device, it makes sense to consider the line of instantaneous water heaters from VAILLANT. The cost of devices with a power of 12-27 kW ranges from 210 to 230 dollars.
In general, buyers tend to choose low-power models of “protos” that are simpler and more convenient to operate. Where a large amount of hot water is required, the choice is usually made in favor of a storage water heater, which is slightly cheaper during operation.
This explains the low popularity of instantaneous water heaters with high power.
To reduce energy consumption and minimize the flow of water by providing sufficient water pressure, very small holes are made in the shower heads of free-flow “flows”. Over time, these holes become clogged due to lime scale and poor water quality.
After this contamination is usually not difficult to remove with a stiff brush or a metal sponge.
The holes in the shower head of an instantaneous water heater are specially made small to reduce water consumption. Special filters help protect the device from pollution
When a specific heater model is selected, it is recommended to carefully study the manufacturer's instructions before purchase. This will help to understand the installation features of the device, as well as to evaluate the features of its operation, i.e. how convenient it will be to use the device after installation.
Small water heaters that are purchased for summer cottages are recommended to be removed and taken to a warm apartment at the end of the season.
In the spring, the heater is not difficult to connect again, but to provide enough good conditions storage in an unheated country house can be quite difficult.
Many homeowners are thinking about how to choose a flowing electric water heater. Such models differ in smaller sizes and almost instantaneous heating of water. In contrast, the boiler is a larger installation. With this device, you can avoid the inconvenience of turning off hot water during maintenance work.
What is an electric flow heater?
A flow heater differs from a conventional boiler primarily in the absence of a drive. The water heats up only at the time of use. You can regulate the temperature of water heating by changing the pressure in the right direction. In addition, flow heaters consume less electricity, because they do not spend it on maintaining the temperature. Thanks to its characteristics, instantaneous water heater allows you to save space, energy and time.
The water heater is a small box, inside which is placed a tubular heating element - a heating element. The water heater works in the following way: water enters the device, and then into the compartment where the heating device is placed. Washing it, the water gradually heats up, and then enters the hot taps.
At the same time, the water temperature cannot be higher than the temperature of the heating device, so scalding hot water will not have to be expected.
Expensive devices have a control panel with various sensors and timers. Inexpensive models equipped with a thermostat that allows you to set the heating temperature. Some devices do not have a control system - they only work in automatic mode.
To install an electric instantaneous water heater, a wire is required that goes separately from the shield. You also need a switch that can operate in automatic mode. The wire must be of a strictly defined section.
The flow storage requires a sufficiently powerful network to operate. Otherwise, you will have to choose a device whose power does not exceed 8 kW.
Types of flow type heaters
Before choosing a flowing electric water heater, you should find out the varieties of this device. This will determine which heater to choose for use.
The flow type electric water heater can be of the following types:
- pressure;
- non-pressure.
Pressure, or system, can be used in different conditions, i.e. from any tap that is in the house. Pressure water heaters cut into the pipes of hot and cold water. Such devices have only an outlet and an inlet for water. The device is controlled by water pressure. System heaters are convenient to use during a planned shutdown of water in the summer.
Non-pressure are characterized by low power (up to 8 kW) and energy consumption. They work from only one water intake point. Such heaters are suitable for shower or use in the country. The maximum heating temperature is 30°C, which makes them useless for use in winter.
All year round, such water heating devices are used only in warm countries, where temperature fluctuations are not so significant.
The cost of such devices is usually low. The set may include shower heads and faucets. If the water intake point is far from the heater, then it is better to install another one close to it - this will significantly save money.
Heater power calculation and selection criteria
Having decided on the type of device, select the optimal power. To do this, you need a table that indicates all the necessary parameters depending on the type of daily needs: flow rate and volume of water, required temperature, etc. Calculation according to such a table can be difficult, therefore it is recommended to use a simpler method: just look at the heater power in the documents and divide this figure by 2. The result will be a flow rate of water heated to 30 degrees.
For clarity, you can use an example. If the power of the flowing heater you like is 16 kW, then the water flow will be 16/2, that is, 8 m / min. That is, for the soul, this value is sufficient. Thus, a lot of hot water can be obtained only if the indicator is more than 8kW.
If hot water is needed not only for the shower, but also at other points, then when choosing a heater, you need to take into account the indicators in the most powerful of them. If you plan to simultaneously use water at these points, then the heater power must be increased by at least 1.5 times.
Heater Selection Criteria
Before buying a flow heater, you need to decide for what purposes it will be used and where it will be installed.
If you need a water heater for seasonal use in the country, then a device with a power of 3.5 kW will suffice. For permanent use, a heater with a power of 5 kW or more is more suitable, capable of heating even cold water in winter.
When choosing a heater, it is important to pay attention to the quality of the material from which the body is made. The device is constantly exposed to high temperatures. The best option- the flowing heater with the enameled case. Such a device will withstand the temperature and exposure to aggressive substances contained in the water.
A copper case is also a good option, because it has a durable case and protection of the heating element from scale. In conditions of work in hard water, such protection will last more than 5 years. A light will signal that it is time to replace the protection. Such devices with a copper case are very expensive.
Tankless Water Heater Manufacturers
Having decided on the parameters, you can proceed to the choice of a specific model. Instantaneous water heaters are produced by the following manufacturers:
- Electrolux is a well-known Swedish manufacturer that produces several lines of flow heaters. Instrument performance may vary. All models have a high-quality anti-scale heating element. Models of the high price segment are equipped with an intelligent control system.
- Kospel. hallmark water heaters of the Polish company Kospel is a stylish design, thanks to which the devices always harmoniously fit into the interior. The heating element is made of high quality copper. Kospel manufactures mainly flow type pressure heaters. There are two lines of non-pressure heaters. Service cost is quite low.
- Thermex. The bulb of the heating element in the heaters of this company is made of high quality copper.
When choosing a brand, it is also necessary to take into account the purpose of the device. If a flow heater is purchased for use in the country, you should take a closer look at the models of the Electrolux or ATMOR brands. Appliances with low power (from 3.5 to 5 kW) will perfectly cope with the heating of water for the kitchen or shower in the country. This does not require major wiring repairs. The cost of heaters of such brands ranges from 1.5 to 2 thousand rubles, but in any case they are available even to buyers with strong limited budget.
The most comfortable models for home
For home use, Thermex appliances are suitable. They are not so expensive, within 7 thousand rubles, they are equipped with a temperature controller. For reliable operation of the heater, it would be advisable to upgrade the wiring.
When choosing a heater for active use throughout the year, you should not choose the cheapest option.
All expensive models have only one requirement - operating conditions. Wiring in the house must withstand at least 20kW. The network is needed at 380 V, so before you connect the water heater, you have to make a serious wiring repair. It is not recommended to mount the heater yourself.
When choosing a flow-type water heater, first of all, you need to find out the capabilities of the power supply and clarify whether additional equipment is needed to install the device.
When a model is selected, it is worth clarifying whether spare parts are on sale, it is necessary to evaluate the scope of work.
A water heater is a device used to heat water in a water supply system. The need to install a water heater is due to frequent problems with the supply of hot water from utilities or to provide domestic hot water country house with autonomous communications.
When choosing the type of heater for a novice user, first of all, it is necessary to build on the conditions of its use. For private houses, the living area in which is disproportionately larger than in standard apartments, manufacturers (and experts) recommend purchasing storage boilers.
But flow heaters are best purchased for placement in apartments. They use a powerful copper heating element, which manages to heat the water as it flows through an isolated circuit. In this unpretentious way, you can get huge volumes of hot water. Another advantage of instantaneous water heaters is their compactness and the possibility of placing on the wall or in a special cabinet, which is very important in conditions of limited space.
Unfortunately, such installations are not without drawbacks. Firstly, the high power of the heating element implies a large consumption of electricity. It's one thing when we heat one draw-off point in a small apartment. Another thing is when it is necessary to provide several points with hot water. In this case, the water simply will not have time to heat up, but if you choose a powerful water heater, the electricity costs will definitely not please the owner of the house.
Today, many companies are engaged in the production and sale of instantaneous water heaters and indirect heating boilers, which are very popular among the mass consumer. However, not all models of the famous series have the right to be called the best. After carefully researching the market, we have selected for you the 12 best water heaters, marked by good reviews from ordinary users and reputable experts. The following criteria were taken as the basis for the rating:
- popularity of the manufacturer and model line of heating installations;
- reliability parameters and performance characteristics;
- vastness of functionality, abundance of protection circuits;
- the presence of design features;
- price match the overall build quality.
The best manufacturers of water heaters for the home
- The largest range of water heaters is offered by the Italian company Ariston. It produces more than 300 models of both storage and instantaneous water heaters. The main advantages of their models are power, strict design, compactness and ease of installation.
- Another Italian brand "Thermex" is famous for producing some of the most affordable water heaters. Their models are famous for their good design, economy and the best ratio prices and quality. It is not for nothing that Thermex water heaters are one of the best-selling in Russia.
- Timberk is a very famous Swedish manufacturer of climate control equipment. The company's production bases are located not only in Europe, but also in China, Russia, South Korea and other countries. Timberk water heaters are, first of all, quality (case materials), performance and reliability. But the price is far from the lowest on the market.
- The German brand "AEG" produces some of the most reliable and modern water heaters. The degree of protection against water they have one of the highest among competitors. Also, AEG water heaters stand out for their compactness, very light weight and low power consumption. But, you will have to pay well for the quality, so not many consumers will like the price.
The best electric instantaneous water heaters
Electric water heaters are the most common, as they can be installed anywhere where there is electricity. In view of the problems with connecting gas in remote communities, electric heaters are, in fact, the only option for homeowners. In Service electrical models much simpler than gas, but the payment for electricity is higher than for gas.
It is worth considering another important point. Low-power water heaters are easy to install - they only need to be plugged into an outlet. But when connecting a device with a power of more than 5 kW, a separate electrical wiring and installation of a fuse are required.
5 Atmor Basic 5
Cheapest water heater Best heating efficiency
Country: Israel
Average price: 2,138 rubles.
Rating (2019): 4.5
With all the skepticism of consumers who somehow came across the products of this company, we simply could not get past one model. Atmor Basic 5 is the cheapest and at the same time the most productive (among small) instantaneous water heaters for houses and apartments. With a power consumption of 5 kW, it is able to heat up to 3 liters of water every minute, leaving a direct competitor from Electrolux out of work.
But, despite such "peppy" operating parameters, there is a certain range of nuances regarding the parameters of reliability and ergonomics. Firstly, Atmor Basic 5 lacks everything that can be missing on the front part - only the power switch is placed on it. Secondly, even with the provided two-level protection (from turning on without water and overheating), there are no guarantees of its long operation. However, reviews of consumers who still ventured to purchase this heater indicate the opposite.
4 Stiebel Eltron DHC-E 12
The best indicator of reliability
Country: Germany
Average price: 31,200 rubles.
Rating (2019): 4.7
Stiebel Eltron DHC-E 12, although one of the most expensive instantaneous water heaters on the market, shows outstanding results in the reliability component. Made in Germany, it fully meets the expectations of consumers, which the latter are not averse to writing about in numerous reviews.
It is worth saying that the DHC-E 12 is not the most powerful model in the series, and certainly not the most productive. 10 kW power of a copper heating element allows you to get up to 5 liters per minute of water with a temperature of at least 60 ° C. It is also noteworthy that the pressure in the installation allows you to connect several points of water intake. The heater is controlled mechanically, has a built-in thermometer, display and temperature limiter. The only truly significant drawback of the Stiebel Eltron DHC-E 12 is the level of cost. For the same money, consumers can buy a washing machine, a good refrigerator or a fully functional laptop. This is the real value of superior quality.
3 AEG RMC 75
Country: Germany
Average price: 15,100 rubles.
Rating (2019): 4.7
AEG RMC 75 is an electric instantaneous water heater from the industrial giant AEG is considered one of the most reliable on the market. The model outperforms competitors in performance (here it is about 5 l / min) and energy consumption. The device is connected to a standard 220 V network and is not picky about the quality of wiring due to its low power consumption, which allows it to be installed even in old apartments. A convenient heat limit function allows you to control the outlet water temperature, and the on indication will tell you when the machine is working.
In the reviews, the advantages of the water heater include ease of installation and high temperature heating (up to 55 degrees). Among negative qualities often there is a price, which depends on the dollar exchange rate, and the absence of a cable for connection in the kit.
In terms of price-quality ratio, this water heater is the best in its class. Thanks to unpretentious work and simple use, the device has earned the trust of many, as evidenced by a large number of positive responses.
2 Timberk WHEL-7OC
The most compact electric water heater
Country:
Average price: 3020 rubles.
Rating (2019): 4.8
The flowing water heater Timberk WHEL-7 OC is characterized by relatively small dimensions and high performance, for which it was able to earn the trust of a large number of consumers. Thanks to the power of 6.5 kW, it is able to provide a flow rate of about 4.5 l / min, which is enough for comfortable use of hot water even for taking a shower. The copper heat exchanger works as efficiently as possible and is able to last for a long time without needing to be replaced, and if you still need to repair any component, then finding it on sale will not be a problem.
In reviews of this heater, buyers most often talk about the best-in-class dimensions and low cost, as well as the presence of a water filter, which has a positive effect on the duration of the device. Among the shortcomings, one point of pressure is noted (connecting only one hose) and mechanical control, with which it is not always easy to set the desired temperature. In general, this model boasts a low price and good quality, and electric power in combination with small size will allow you to use it in almost any place.
Which water heater is better to choose - instantaneous or storage? Each of them has both its clear advantages and disadvantages, which will be discussed in the following table:
|
Water heater type |
pros |
Minuses |
|
flowing |
Compact size Instant water heating Unlimited hot water Aesthetic appearance |
Large power consumption (up to several tens of kW) |
|
Cumulative |
Low power consumption Increased economy Heated water can be used simultaneously by several taps Can be plugged into a regular outlet in the apartment Large selection of manufacturers |
Large dimensions Long heating of the storage tank During a period of high consumption of hot water, the device may not have time to heat water for the whole family |
1 Electrolux NPX6 Aquatronic Digital
popular model
Country: Sweden (made in China)
Average price: 9750 rubles.
Rating (2019): 4.9
Electrolux NPX6 Aquatronic Digital is considered one of the most popular models of instantaneous water heaters. Despite the performance of 2.8 l/min, it consumes a ridiculous 5.7 kW of electrical energy, which is one of the best indicators in the class. Electrolux has always been famous for the quality of the materials used, and this water heater is no exception - you don’t have to worry about the fact that any element will fail.
You can hear mostly positive feedback from buyers. Among the advantages, the presence of several pressure points is noted, which allows you to connect more than one source of water, as well as simple electronic control with temperature setting modes. The water heater has an electronic display on which it is convenient to set parameters. The disadvantages include top eyeliner water, which is inconvenient in those apartments where communications are located below. Electric heater works efficiently, and even at any pressure, the water temperature will be kept at a given level. The advantages listed above, as well as small dimensions and weight, combined with a low price, make this model in demand among buyers.
Video - installation of an Electrolux NPX6 water heater
The best gas instantaneous water heaters
Flowing gas water heaters are the most profitable devices for an apartment or a small house. The cost of gas is several times lower than the cost of electricity. However, the disadvantage of gas heaters is the need for a gas network, as well as the difficulty in installing such devices. Due to the release of harmful substances during the combustion of gas, it is necessary to install good ventilation in an apartment or house.
5 Etalon A 10
Best price
Country: Russia (produced in China)
Average price: 4,420 rubles.
Rating (2019): 4.4
The inclusion of the Etalon A 10 in the list of the best flow models is not in vain, as the company is really striving to release “people's” heaters. The main "trick" of this instance is the level of cost. With an actual thermal power of 20 kW, the water heater produces up to 10 liters of water per minute. In this scenario, adding a little more useful features, Etalon A 10 could compete for the championship in the category, but ...
... the most important “but” is the absence of the usual protection elements. There is no gas control, so you should be very careful when using the column. The model is controlled mechanically, there is a heating temperature limiter and an electric ignition function. In general, consumers are satisfied with the purchase, both for a private house (for one specific water intake point), and for small apartment especially considering the low price.
4 Roda JSD20-T1
User choice. High thermal power (20 kW)
Country: Germany (made in China)
Average price: 10,800 rubles.
Rating (2019): 4.6
Despite not the most outstanding performance in terms of performance, Roda JSD20-T1 is a worthy addition to the rating of gas instantaneous water heaters. The reason for this is simple: this model enjoys special love and popularity among consumers. The installation gives up to 10 liters of hot water per minute, provided that its power is 20 kW. There is a system of electric ignition and gas control. Basic information about the heating process is displayed. But the main feature of the model lies in the design.
Roda JSD20-T1 is equipped with a turbine that performs two functions: forcibly removes combustion products to the outside and pumps air into the combustion chamber. The whole system is subordinated to a single controller, which comprehensively adjusts it to obtain a specific power and outlet water temperature. Actually, for ease of management and the presence of all the necessary functions, this model fell in love with a wide range of users.
3 Zanussi GWH 10 Fonte
Best functionality
Country: Italy
Average price: 6 332 rubles.
Rating (2019): 4.8
Flowing gas water heater Zanussi GWH 10 Fonte can be considered one of the most functional on the market. In addition to the power of 18.5 kW, providing 10 l / min of productivity, it has electric ignition from batteries in its arsenal. This allows you not to worry about providing the device with electrical energy - it is autonomous and uses only gas as a resource. The device has an organic design and small dimensions, thanks to which it will successfully fit into the interior of any bathroom or kitchen. The copper heat exchanger is resistant to corrosion, but it is not recommended to turn it on “dry” - this can lead to failure of the heating element.
Customer reviews are mostly positive. They note reliability in operation and ease of operation. The negative points include only a slight noise during operation. The device has the best control system among competitors, consisting of a display on which it is convenient to set the water temperature, and a thermometer to control it. Electric ignition automatically turns on when needed. The heating rate is such that after switching on, warm water flows from the tap after 15 seconds. In terms of the combination of qualities, one of the best models on the gas heater market.
2 Ariston Fast Evo 11B
Max power
Country: Italy
Average price: 11,426 rubles.
Rating (2019): 4.8
The powerful gas instantaneous water heater Ariston Fast Evo 11B has gained popularity among many users of such equipment. The main advantage is the best in its class power, which is 19 kW. Thanks to this, the device is able to provide a high performance of 11 l / min for a long time. For example, such a device can be used to supply hot water during a bath. The distinctive features include the possibility of ignition from batteries - this is a big plus, since no electrical communications are required. The power indicator will tell you when the device is working and when it is not.
Among customer reviews, positive feedback is more often heard. Among the advantages noted ease of installation, a variety of security systems, such as gas control and overheating protection. Disadvantages according to users - not too high heating rate. In addition to the above qualities, the water heater has electric ignition, so there is no need to turn it on every time to start heating water. Low inlet pressure threshold - only 0.1 atm, allows you to install the device almost anywhere.
Video review
Which water heater is better to choose - gas or electric? Each of the heating methods has both its clear advantages and disadvantages, which will be discussed in the following table:
|
Heating method |
pros |
Minuses |
|
Gas |
Increased efficiency (gas is a cheap fuel) Heats water faster |
higher price Gas is flammable and explosive Difficult installation (must be carried out by a specialist) Requires the installation of a chimney to remove combustion products |
|
Electric |
Large selection of models Convenient use Absolutely safe No chimney required |
Increased electricity consumption It is necessary to conduct a separate cable from the electrical panel of a large cross section Slower water heating (compared to gas models) |
1 Bosch WR 10-2P
German quality
Country: Germany
Average price: 10,600 rubles.
Rating (2019): 4.9
The Bosch WR 10-2P gas instantaneous water heater is one of the most common models on the market. The device boasts a power of 17.4 kW, which is enough to heat water up to 60 degrees. Together with a capacity of 10 l / min, this allows you to comfortably take a shower. There are 2 versions of the water heater: for natural gas P23 and liquefied P31, so that the device can be operated where there are no communications. Among competitors, the best in terms of the range of water pressure supplied to the inlet is from 0.1 to 12 atm., Which allows it to be installed on any water pipes.
AT positive feedback customers note ease of use and reliability in operation - this is a Bosch trademark. The disadvantages include factory defects on some models and the water heater body that is not resistant to corrosion. When buying, you should pay special attention to the condition of the heating elements and in no case run the device without water - this can lead to the heat exchanger burnout. Despite not the lowest cost, a worthy option to purchase.
The best indirect heating boilers
Indirect heating boilers use the energy generated by a heating boiler or other similar devices. A special coil or tank is placed inside the boiler. Due to the built-in circulation pump the coolant constantly circulates in the tank, which serves as a source of water heating in the boiler. The main advantages of such devices are increased efficiency (in fact, the boiler itself does not consume anything), good thermal insulation, unpretentiousness (does not require constant attention), safety and long service life (up to 60 years).
The boiler is installed next to the heating boiler and heating, as a rule, occurs only when the heating is turned on. This is the main disadvantage of such devices. However, with proper installation of the heating system this shortcoming can be avoided.
2 Baxi Premier Plus 150
The best heating rate. Heat exchanger "coil in coil"
Country: Italy
Average price: 40 370 rubles.
Rating (2019): 4.6
The second place in the ranking is Baxi Premier Plus 150, a rather expensive, but very efficient indirect heating boiler. The advantage of the device is that it quickly heats the water due to the unique design of the coil-in-coil heat exchanger. If the heating rate seems a little, not a problem - you can install an additional heating element (heater), which is immersed deep into the boiler.
Baxi Premier Plus 150 is compatible with absolutely all heating boilers, including condensation. The mounting method is universal, that is, the boiler can be placed both on the wall and on the floor. The tank capacity is more than sufficient - 150 liters. The weight of the device is only 30 kg, which will be appreciated by boiler installers.
According to user reviews, the Baxi Premier Plus 150 is characterized by high performance, high quality and reliable performance. Water shortage will not be felt even in families of 4-6 people. According to some calculations, by saving electricity, the purchase of a boiler will pay off in 4-5 years.
1 Gorenje GV 120
The best ratio of price and quality
Country: Slovenia
Average price: 21,100 rubles.
Rating (2019): 4.7
First place in the ranking - Gorenje GV 120, one of the most affordable storage boilers indirect heating. Despite the low cost, the device is equipped with all protection systems, including overheating protection, reverse and safety valve. There is a thermometer, indication of heating and inclusion. The boiler can serve several points of water intake, which is convenient for the home. We note a good tank capacity of 120 liters. and a stainless steel heat exchanger with high corrosion resistance.
According to numerous user reviews, the device quickly heats water (no more than 20 minutes), has a built-in magnetic anode. Also, many appreciate the five-year warranty on the tank and, in general, a very affordable price. Cons Gorenje GV 120: heavy weight and unfinished instructions.
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