Hot water heating tap. Water heater on tap. Supretto - domestic hot water tap from China

Have a problem with hot water? The situation will be saved by the nozzle on the tap for heating water - a device built into the faucet for the kitchen or bathroom and providing residents country house or apartments with water of the required temperature. A compact water heater for a tap is recommended for use in cottages that are located far from the central water supply network. You do not need to purchase a nozzle and a tap separately. In specialized plumbing stores, you can already buy an instantaneous mixer with a water heater for the kitchen or bathroom. It is also suitable for apartment buildings.

It is advantageous to install it in apartments where hot water is turned off for the summer period or its temperature in the system does not correspond to standard indicators. In such cases, contemporaries usually install a water heater, but a faucet attachment, which can be bought in virtually any plumbing store, will cost 7 times cheaper. The mixer with a heater also helps in emergency situations. The scope of application of plumbing equipment is extensive. You can install a hot water tap, the price of which can range from 2,900 to 5,200 rubles, in:

• beauty salons and entertainment centers;
• medical institutions;
• country houses;
• institutions of the HoReCa sphere and so on.

A mixer installed in a house or apartment with an instantaneous water heater will operate from the mains. Heating the substance takes 5-7 seconds from the moment the tap is opened. Depending on the model and manufacturer, the nozzle on the tap for heating water can heat the substance up to 60-800C. Each type of mixer provides for the regulation of the liquid temperature. Therefore, the device for heating water to the tap can be used in apartments and houses where small children grow up. Tests have shown that plumbing equipment of this class is as reliable and safe as possible. This is what a Chinese manufacturer's device looks like for a washbasin.

Advantages of portable heaters

• Versatility.

In most cases, an electric faucet for water, the price of which depends on the manufacturer, is bought for country houses. In this case, users consider the installation of such a device to be an advantageous solution. In other cases, electric water taps are considered redundant. This opinion is not entirely true. It is profitable to buy a portable electric water heater mixer even during interruptions / shutdowns in an apartment with hot water. It can be installed for a "problem period", then dismantled and connected to a conventional mixer.

An electric tap, which heats the water itself, has an affordable price and is installed horizontally. The principle and technology of the installation is similar to the classic mixer. The only caveat of installation is that the water heater on the tap in the bathroom or kitchen is connected only to the pipe cold water and in addition to the network. Installation is carried out on the side of a sink or sink, bath in the provided holes. The portable electric water heater can be installed without the help of a plumber.

• Affordable cost.

The purchase of a boiler, its installation and maintenance will cost an order of magnitude more than a nozzle for a tap for heating water, the price of which will pay off, if you believe the recall of users, in 6-8 months.

• Fast and uniform heating of the liquid.

Hot liquid will flow from the mixer within 5 seconds after turning on the tap. In this regard, a mixer with water heating, the price of which is an order of magnitude lower than the cost of a boiler, is a more practical device.

• Saving time.

Heating water on a stove or using a boiler will take from 40 minutes to 1.5-2 hours. In order not to waste time, it is more profitable to buy a water heater for a bathroom or kitchen faucet, which will supply hot liquid at a predetermined constant temperature throughout the entire period of operation of the device. Based on this, many consumers consider a device for heating water to a tap the most practical option - hot liquid does not finish at the wrong moment, there is no need to reheat.

• Cost savings.

When heating a liquid on a stove or using a boiler, consumers consume gas / electricity for a long time. In this case, the boiler heats up the liquid every 15-25 minutes. And the electric water heater for the bathroom tap, which can be bought with a guarantee of up to 3-5 years, functions after the fact. When hot liquid is needed, then the user receives it. The rest of the time, the nozzle for heating water on the tap, the price of which depends on the type of mixer, does not consume electricity. A portable mixer with an electric water heater consumes 3 kW per hour of electricity.

• Compact dimensions.

Due to the design features, the faucet water heater, which can be bought from several reliable Chinese manufacturers, has an enlarged body. The dimensions are determined by the nozzle on the tap for heating water, which can be bought separately from the mixer (if repair is needed). But no matter what size the water heater or the nozzle on the tap, the dimensions of the plumbing electrical device will be much smaller than the boiler. As well as the area of \u200b\u200blocalization. An innovative electric mixer for a kitchen or a bathtub takes up as much space on a sink or sink, as well as a standard spout.

• Saving water consumption.

The compact-portable electric water faucet is always supplemented with a special nozzle to save fluid consumption. It is an aerator that prevents splashing of the substance. Using an electric flowing water heater on the tap, consumers can supplement the mixer with a special aerator, which intensifies the stream, reducing the volume of the supplied substance. A modern mixer water heater has a water flow rate of 6-8 liters per minute.

• High decorative qualities.

Many users believe that the water heater nozzle spoils appearance plumbing device and makes its design typical. This opinion is wrong. From some manufacturers, you can purchase a mini flow-through water heater with a unique color scheme. Moreover, the style of the mixer itself can be different. According to the designers, the flowing water heater to the tap not only does not spoil the appearance of the device, but also makes it unusual and unique. The electric hot water mixer can be purchased on the market with different body colors - red, granite, gray, milky white, yellow, matte effect and so on. From leading manufacturers, you can buy a heater for a water tap with a unique spout shape, levers or valves of non-standard geometry.

The innovative mixer with water heating has another advantage - it is safe. The device is grounded, equipped with control mechanisms that do not heat up during the operation of the water heater on the tap, and a lever for adjusting the water temperature.

Design features and principle of operation

The principle of operation of the device is extremely simple. As mentioned above, an electric flowing water heater for a tap is connected only to a cold water pipe. When the mixer is turned on, the liquid is fed into a special tank in which the heating element is placed. Within 3-5 seconds, the substance is heated and enters the spout. To ensure that the electric mixer can perform its functions safely, it is equipped with the following accessories:

• The body. It houses a water heater for a tap, the price of which depends on the performance characteristics of this particular element, and electronic components. The body can be made of thermoplastic or metal. In 87% of cases, the mixer nozzle is sewn into a heat-resistant housing. This guarantees the safe operation of the device.
• Spout. The shape and dimensions depend on the type of water supply valve. If you need a water heater for a faucet in the bathroom, the price of which will depend on external data, then the spout will be shortened, like typical faucets. Kitchen device options are equipped with high and arched spouts. A device for heating water can be installed on the tap in the bath. There are beautiful models of sanitary equipment, complete with hygienic shower. In this class of devices, you can buy a water heater for a tap with a shower and a long / short spout. There are many options for plumbing devices.
• Control lever. This element of the water heater tap is installed in only three positions. If the user needs to turn on cold water, turn the lever to the right. If it is necessary for the water heater on the tap to start functioning, turn the control element to the left. If the lever is put straight, the mixer will stop functioning. There is no other way to turn the lever of the mixer with a water heater, which guarantees safe use device - incorrect use of the spout and burns is excluded (the liquid is not heated instantly).
• Flexible eyeliner.
• Ceramic cartridge.
• Thermocouple and pressure valve.
• Heating operation indicator.

Since the water heater in the mixer is an electrical device, it must be isolated from contact with running water. For these purposes, waterproof protective membranes are used in quality taps. They are used to isolate electrical components. In addition, the electric tap for hot water has an RCD - a device that automatically turns off the heating element if there are failures in the power grid. RCD prevents accidents (electric shocks to users) and protects the hot water heater on the tap from burnout.

The pressure valve used in the mixer design also has a protective function. If the nozzle for heating water to the mixer is working and the water pressure in the pipes at this moment drops to 0.4 bar. or the substance ceases to yield, the heating element will automatically turn off. Automation and at a water pressure of 7 atm. will turn off an instantaneous water heater to a tap, which you can buy for kitchen equipment in a house where small children grow up.

To prevent the instantaneous water heater mixer from failing due to a water hammer, a silicone damper is provided in the design. It is also worth remembering that the nozzle on the hot water tap does not heat the liquid above the established rate, so burns are excluded. In stores, consumers can buy a device capable of heating the substance strictly to temperatures of 60 and 70C. Compliance with this indicator is monitored by a sensor built into the mixer body. When the nozzle for the tap for heating water, the cost of which depends on the technical data of the device, has heated the liquid to normal, the sensor automatically turns off the heating element.

Are there any disadvantages to the faucet attachment?

Yes there is. Users noted that a water heater for a mixer, the price of which is significantly lower than that of other electrical appliances for heating a large volume of liquid, supplies water of a lower temperature during prolonged operation. What does it mean? This means that if the mixer that heats the water operates continuously for 45 minutes - an hour, then the heating element ceases to have time to heat the flowing substance to the desired temperature. In this case, a cheaply purchased nozzle for a tap for heating water will heat the liquid to 45-500C. If you give the device a break, it will start heating the liquid again in the specified mode.

Experts also note that a water heater for a tap, the price of which is significantly lower than the cost of a boiler, requires a wiring check before installation. You should beware of overloading the mains along the branch and short circuits. In addition, it is recommended to install filters rough cleaning, otherwise a mixer with a heating element, which today can only be bought from foreign manufacturers, will fail after 3-5 years of operation.

The water heater on the mixer did not show any other shortcomings. Users of hot water appliances on the tap in their reviews speak positively of the devices. Their main recommendation is to purchase an electric instantaneous water heater for a mixer from reliable manufacturers or suppliers that guarantee the originality of the device.

Which manufacturers offer high quality faucet nozzles?

So: you decided to buy a heating tap for water, assessed the market and designated the price category of devices, but you don’t know which model to choose? Let's figure it out. The most reliable water heater faucets are offered by only a few manufacturers.

The budget tap for water heating is offered by TM "Aquatherm". It is as simple as possible to install, it is guaranteed to work without interruptions for up to 5 years (this is confirmed by the feedback from users of the devices of this company) and heats the liquid to 60C. If you need an inexpensive and high-quality tap nozzle for heating water, you can buy it from Aquatherm. The mixer has the maximum degree of protection: RCD, membrane insulation, pressure sensor and ground wire. But the most important device for a tap for heating water can be supplemented with a shower head and always has a filter for purifying the water supply. The design of a heating tap for water of this brand can be anything.

Aquatermovskiy faucet water heater is available in various colors. You can choose a plumbing fixture for any interior solution. The opinion of experts: an affordable flowing water heater for the Aquatherm tap is an ideal solution for country cottages where people live year-round and apartments. The innovative faucet heater is inexpensive and offers good performance.

They speak well of Kruss (China). The manufacturer offers improved classics. His models have a minimized and streamlined design, so the devices fit perfectly into interior solutions. It has a tap for heating running water and design differences - a nickel-plated lever, blue indicator lights and a reinforced flexible hose. The maximum temperature of water heating is 600C. The main advantage is that the Kruss electric mixer, the price of which will not be much higher than the devices of the previous manufacturer, is equipped with a thermostat. The consumer himself can set the required water temperature.

The company "Delimano" today offers the most advanced devices. From the manufacturer you can purchase an inexpensive electric water-heating mixer with a display that shows the current water temperature. Plumbing equipment looks stylish and bright, heats the liquid up to 60C. At the same time, the nozzle for the mixer for heating water is built into the plastic case, which seemed impractical to some users - poor resistance to stress, scratches. The Delimanovsky mixer with a built-in water heater will be able to function without interruption if the water pressure is in the range from 0.5 to 0.6 atm. Users noted that the devices of this TM have an elongated electric cord - up to 1 m. At the same time, the flow-through mixer allows you to change the pressure of the jet. Often in the plumbing equipment of this manufacturer, aerators are used to save water - the jet is saturated with air.

Above are manufacturers whose water heating taps are close in price and have maximum functionality, quality and safety. But the market can also offer devices from other manufacturers: Aquastream (minimal device dimensions, convenient energy saving system), Corraveni (ceramic valve, chrome-plated surfaces, built-in water temperature control system) and RAPID (multi-level overheating protection). These manufacturers have higher prices for water heaters for a tap - you can buy them from official suppliers of sanitary equipment.

Experts recommend choosing a tap for heating running water according to its safety characteristics. It is worth paying attention to the installation method. Do not choose models with short flexible hoses - typical 60 cm. Also check with the supplier what materials the body is made of. The quality of the cartridge is also important. Devices with ceramics will be more durable and practical. For other parameters, a mixer with heated water is chosen in the same way as a classic plumbing fixture.

Agree, the long absence of hot water in any house modern man will plunge you into despondency. Everyone solves this problem in their own way - some install a large one, others use compact instantaneous water heaters, but we invite you to familiarize yourself and evaluate the capabilities of the mixer-water heater. In this article, together with the site, we will deal with this modern devicelike an electric faucet water heater, which even in times of long absence of water will give you the opportunity to enjoy the benefits of civilization.

Faucet with water heater photo

Electric faucet water heater: design and principle of operation

What is a water heater faucet? In fact, this is an ordinary, slightly enlarged mixer, in which a powerful heating element and a lot of fine equipment are compactly located, ensuring the operation of the device safe for humans. You can distinguish this device from an ordinary mixer only by the presence of a wire for connecting it to the network - otherwise they are almost identical.

A modern flowing tap water heater has three modes of operation.

• Off The handle familiar to everyone is in the middle lowered position. At the same time, the mixer-heater is inactive - water does not run out of it, electrical circuits completely de-energized.
• Cold water mode - the control lever is turned to the left. The electrical part of the mixer is completely disconnected, and cold water runs from the tap.
• Hot water supply mode - the lever is turned to the right. The electrical system turns on and within 5-10 seconds. hot water starts to flow from the tap.

Electric faucet water heater photo

In almost all models of such water heaters, the water temperature is adjusted by increasing or decreasing the fluid pressure - lifting the lever up or lowering it down, you can set the required water temperature with an accuracy of one degree. There are also such models of mixers in which the temperature regulator is placed on the side of their body - this design is a little more convenient, since the electronics monitoring the water pressure controls its temperature, increasing or decreasing the heating.

Human electrical safety is provided in electric mixers using a residual current device (RCD), compactly located on the power cable. In the event of a breakdown, the power supply will be cut off in a matter of fractions of a second.

How the mixer water heater works, as well as how it is installed, can be seen in the video.

Advantages and Disadvantages of Mixer Water Heater

Agree, without having any advantages, no device or device would simply not withstand the competition for a place in the sun and would simply become unclaimed garbage. The faucet with an electric water heater is no exception - it is popular due to the following advantages.

1. Almost instant water heating. Such mixers reach the set operating temperature in just 5 seconds. In fact, a water heater is able to provide the appliance on which it is installed with any amount of hot water. Compared to other instantaneous water heaters that are not able to fill the bath, a tap with a water heater copes with this task quite successfully.
2. Constant water temperature, regardless of the pressure - once you set up this water heater, as they say, for yourself, you no longer have to worry about boiling water coming out of the tap.
3. Small dimensions - one might even say scanty when comparing a water heater tap with other types of similar devices.
4. As a consequence of the previous advantage, it can be noted that a mixer with a water heater does not spoil the appearance of the room. An uninitiated person will not even guess the purpose and capabilities of this type of mixers.
5. Relatively inexpensive cost. You can buy such a device for a price of $ 100 or more. If we compare it with other types in this regard, then we can safely say that this is more than an affordable product.

Faucet with electric water heater photo

Not without its drawbacks, among which we can only note the high power consumption. But convenience comes at a price. Such a water heater consumes as much as 3 kW of energy per hour. Also, as a disadvantage, one can note a low flow capacity - in most cases, this crane is capable of heating from 4.5 to 6 liters of water in one minute. If we compare this characteristic, for example, with a gas column, then its throughput is more than twice. But, nevertheless, according to the developers, this volume of heated water is quite enough to fully take a bath and take a dip. He copes with this task best.

Tap water heater flowing photo

How to choose a faucet water heater: protection stages

A mixer-water heater is a serious device, and it combines two incompatible things, and in the immediate vicinity of a person - water and electric current. Naturally, it should be understood that this device should have the maximum number of degrees of protection. The presence of the following safety elements in this water heater is considered normal.

1. Built-in RCD. This device will protect a person from electric shock in the event of a breakdown of the heating element and other electrical parts of the mixer. In addition, it will take care that the device does not fail from voltage surges.
2. Water overheating protection. A special sensor built into the heating chamber will turn off the power when the water temperature reaches + 60 ° C. When the temperature drops, the heating element is automatically turned on.
3. Dry start protection. In the absence of water in or at its minimum pressure of 0.04 MPa (0.4 atm.), A special sensor will also turn off the supply of electrical energy. In the same way, this sensor will also arrive at an overpressure in the water supply system of 0.7 MPa (7 atm).
4. Protection against water hammer, which can easily disable an expensive water heater tap. Such protection is realized by installing a special silicone damper and elastic plastic in the mixer body.
5. In addition, all electrical equipment of the crane is protected by special waterproof shells in accordance with the international standard IPx4.

Faucet water heater photo

As you can see, the presence of such serious protections makes this device as safe as possible for humans.

In conclusion, a few words about how the electric water heater faucet is installed. If not to be verbose, then its installation is carried out in the same way as the installation of a mixer similar in structure to it. The only exceptions are two things: firstly, it connects only to a cold water supply system (although there are also combined models that allow you to use hot tap water) and, secondly, a separate branch of electrical wiring must be connected to this mixer in accordance with its capacity ( cable cross-section must be at least 2.5 squares). Protective grounding is required!

Summer interruptions in hot water will not be so relevant if you purchase a tap with instant water heating. What is such a faucet with water heating?

Water heater tap design

According to the type of control, water heater taps are divided into hydraulic and electronic. The hydraulic valve has power switching regulators. Switching is done manually. Thermoregulators have an electronic type of control, which automatically control the required water temperature. In this case, the electronic display shows the temperature of the water in the tap.

Principle of operation

The water heater very quickly (in 10 seconds) brings the water to a temperature of 60 degrees. The faucet water heater has a simple operating principle. Tap water, passing through the heating element, instantly heats up to a high temperature. This is the main advantage of the device. After all, electricity is consumed only during the drawdown, which significantly saves it. The faucet water heater has other advantages.

Differences between cranes by individual characteristics

Water heater taps differ from each other in such parameters as:

• Heating element type , which can be in the form of an open spiral, or heating element (closed type). The open coil is placed inside the plastic tubes. The spiral current heats up the water passing inside the plastic housing. Heating elements are safer in operation, since these elements do not come into contact with water;
• Instrument control ... It can be mechanical (hydraulic) and electronic. The hydraulic control method only reacts to strong water pressure. The electronic control method is also possible with a low water pressure, the system itself determines the required power for heating water;
• Principle of operation - pressure head and gravity. In the pressure taps of water heaters, the water is constantly under water pressure.

​

How to properly operate

The device has a power from 3 to 27 kW. Some consumers complain about the high power consumption of a water heater tap. To reduce electricity consumption, you need to consider some points:

• Calculate the family's hot water needs. If the family is small, then a less powerful water heater can be installed;
• In order to save money, you can take a shower, not a bath.

Since the instant heating tap belongs to high-power electrical appliances, when installing it, it is necessary to conduct a separate electrical wiring and make grounding.

Advantages and Disadvantages of Mixer Water Heater

A tap with a water heater has a number of advantages over storage heating devices. The latter do not immediately heat the water, but gradually heat it up, and then spend energy to maintain the required water temperature. Among other benefits the following should be noted:

Noting the advantages of the device, it is worth pointing out some of its cons ... Comparing water heater taps with storage heating systems, it should be noted
following:

• More hot water (60 degrees), only powerful faucets give out. But, such devices consume a lot of electricity;
• If water needs to be heated in large volumes (for a bath), then the power consumption will also be large;
• A faucet with a water heater can operate in trouble-free mode with a stable voltage in the mains (without drops);
• Such devices cannot be installed in one house, simultaneously at several points of water intake.

Thus, after analyzing the pros and cons of water heater taps, we can draw the following conclusion: such devices are more suitable for small needs for hot water, or installed in the summer, for the period when hot water is turned off.

Characteristics and prices of water heater taps models

Taps-water heaters do not require complex and constant maintenance... But, getting a lot of hot water at once with the help of such a device will not work. Typically, a faucet with a water heater has a capacity of 1.8-4 liters per minute. An increase in water consumption exceeding these indicators leads to the fact that the water temperature decreases.

An instantaneous water heating tap, which is used only in summer (at an inlet water temperature of 15-18 degrees), consumes about 3.5 kW, which is quite acceptable. But, for winter operation, such a device will not cope with heating water up to high temperatures, since this requires a device with a power of 5-7 kW.

Electronically controlled models maintain a constant, preset temperature of the water leaving the tap (for example, 40 degrees). In this case, the heating temperature is displayed on the electronic display of the device.

Also, the Russian Aquatherm crane has quite positive reviews.

The price of a faucet water heater is quite affordable.

So, the price for the most popular models on the Russian market - Aquatherm cranes (3 kW) - from 5169 rubles to 6600 rubles.

Imported models Edisson System 600 (Edisson, UK) with a capacity of 6 kW for 2670 rubles.

Medium PRO 8 (Timberk, Sweden) for 7.5 kW for 5040 rubles, with a heating temperature controller, etc.

To quickly solve problems with hot water supply, a technical device has been created - a flowing electric water heater for a tap. A useful device in everyday life differs from its predecessors in its affordable cost, compactness and ease of installation.

The effectiveness of the device can be appreciated at its true worth if specifications will meet the user's needs and operating conditions.

Instantaneous tap water heater is the most compact electrical appliance that provides hot water supply. The expediency of using a compact device depends on the intensity and operating conditions.

To determine whether a mini-heater is suitable for your own needs, you should compare the pros and cons.

The main advantages of a compact water heater for a tap:

1. Compactness. This argument becomes decisive for small spaces. The heater takes up the space reserved for the mixer for installation on a bathroom sink, kitchen sink or countertop.
2. Heating rate. Depending on the power of the model, the warm-up time to a comfortable temperature ranges from 10-30 seconds. They cannot boast of this quality - the boiler must be turned on in advance, at least 30 minutes before use.
3. Temperature constancy. In technically advanced heaters, the heating process is monitored by electric sensors that regulate the heating element level.
4. Aesthetics. The variety of the model range allows you to choose a water heating tap for a specific interior style. Manufacturers offer pieces of different colors with a glossy or matte effect, unusual shapes spout and valves of original geometry.
5. Ease of installation. The technology is almost identical to that of a conventional crane. The difference lies in the need to supply power and ground the device.
6. High efficiency. The thermo-faucet functions in fact - heating is carried out only during the use of the mixer. In a state of "rest", electricity is not consumed.

The advantage of a small-sized module is its cost. The price of a water heating tap is less than a full-size electric one or, moreover, a storage boiler.

The choice between a storage tank and a water heating tap is based on an assessment of the needs: the required volume and temperature of water heating, the mode of use, the availability of free space, etc.

However, manufacturers of flow-through devices declare the efficiency of devices, focusing on the consumption of electricity exclusively at the time of using water. While the storage boiler operates in the mode of maintaining the set temperature, the unit turns on every 20-30 minutes.

The main disadvantage of the flume is high energy consumption. The average power of the heating element is about 2.5-4.5 kW. With regular use of the water heater, electricity bills will increase significantly

Additional disadvantages of a tap water heater:

1. Limited bandwidth. The volume of heated water is 4-6 l / min. For comparison, the performance of a gas column is about 1.5-2 times higher.
2. High network load. Installing the pipe in a building with old wiring requires a separate cable. Regardless of the state of the electrical network, the flow device is necessarily connected through a reinforced outlet connected to the RCD.
3. Service of one point of water intake. It is impossible to divide the incoming volume of heated water into several streams. To organize hot water supply for several points, it is better to purchase a storage heater or wall duct.
4. The complexity of the repair. In the event of a breakdown, it is problematic to restore the functionality of the portable module - in the retail network there are an order of magnitude less repair kits for such models than for a wall-mounted electric heater.

When thinking about buying or for a kitchen mixer, it should be borne in mind that low-power appliances can increase the water temperature by 25 °. This figure is sufficient in the warm season. With the onset of cold weather, with a significant decrease in the temperature of tap water, it is unrealistic to get the desired 35-40 ° C.

Modifications of the flow-through without adjustment perceive the low water pressure as its complete absence - the flow-through module simply does not start up

Despite the indicated disadvantages, it is advisable to install mini-heaters in the following situations:

• instability of centralized hot water supply, when network interruptions are short-lived - no more than a month;
• seasonal water consumption is inherent in country houses, country cottages;
• organization of water supply in the summer kitchen of a private household;
• in hairdressing salons, beauty salons;
• in kitchens in buildings with individual gas heating - it is not profitable to turn on the boiler for the sake of washing dishes.

In short, the installation of a heated tap is fully justified if hot water supply is not required constantly and in a limited volume.

Features of the device and operation of the "flute"

A miniature water heater is outwardly similar to, a distinctive feature is its increased dimensions. In a heat-resistant case, a water heating element and a lot of equipment are hidden, which are responsible for the safety of operation of the thermo-nozzle.

The main working units of the heated tap are: a powerful heating element, a sealed cylinder with holes, a thermostat, a water supply relay, a hydraulic protection, a control lever and a spout. Some models are complemented by an electronic display and temperature indicators

Inside the module there is a cartridge mechanism for adjusting the water flow rate and a reservoir with a powerful electric heater. It is the small internal volume of the tank and the high power of the heating element that explains the ability of the heater to reach the desired temperature in a matter of seconds.

The principle of operation is extremely simple. The water enters the heating cylinder, contacts the heated spiral and, already heated, is supplied to the mixer outlet.

The design of the instantaneous electric water heater for the tap provides for the so-called "safety group".

The complex includes the following elements:

1. Pressure sensor... It turns off the heating element if it does not exceed 0.004 MPa and blocks the operation of the module when the value rises above 0.7 MPa. Excessive head is dangerous for internal elements.
2. Flow sensor and thermostat. Provides protection of the tubular electric heater from combustion when the water supply is cut off. In addition, the flow sensor is responsible for instant heating after opening the tap.
3. Automatic fuse. In the event of a surge in the mains voltage above the norm or with a short circuit inside the module, the current supply is interrupted.

Most flute pipes are equipped with water hammer protection - elastic plastic and a silicone damper are placed in the device body.

Responsible manufacturers supplement their products with built-in RCDs for maximum user safety and prevention of electric shock in case of heater breakdown

Types of compact electric heaters

Hot water supply modules for a tap are usually divided into two types: a removable heating nozzle and mixers with a built-in heating element. To supply warm water to the sink of the washing area and to the kitchen sink, universal wall ducts are often used.

Separate tap nozzle

The module is installed on the spout of the previously installed mixer. The main advantages of the mini-block: low cost, the ability to connect to an existing crane, compactness. The disadvantages are obvious - as a rule, the thermo-block has low power and performance (about 4 l / min).

Small dimensions do not allow equipping the attachment with a full-fledged safety system and more or less powerful heating element. The efficiency and reliability of the device is rather low

As a protective element, the module is equipped with a thermal sensor that prevents overheating of internal elements.

Instant water mixer

Heated taps occupy the majority of the miniature flow-through water heater segment. The device operates in three modes:

1. Hot water supply. The mixer handle is turned to the right. The electrical system is activated by providing warm water.
2. Cold water supply. Turning the lever to the left turns off the electrical part of the tap - cold water runs from the mixer.
3. Shutdown. Joystick handle in center lowered position - heating tap is inactive. The circuit is de-energized, the water supply is cut off.

In most models of flow type, the water temperature is regulated by changing the pressure. Moving the lever vertically allows you to select the heating mode with an error of 0.5-1 ° C.

A water heater is more expensive than a separate nozzle. But the difference in price is paid off by the increased productivity of the device and a high degree of safety.

Wall-mounted "flow pipe": pressure and non-pressure model

A universal water heater can be connected to the tap.

The electrical module has a number of distinctive features:

• the ability to service several water intake points at the same time;
• high degree of protection;
• productivity up to 7-9 l / min, which is more in comparison with nozzles on the faucet and mixer-heaters;
• wall mounting.

The body is made in the form of a capacious box. The increased area of \u200b\u200bthe heating element explains the improved heating characteristics of the device.

The block is attached to the wall near the tap. In order not to clutter up the space for a mirror or a spacious shelf, the module can be placed under the sink

Wall flutes are of two types:

1. Pressure. Hot water from the heater is supplied to the distribution network, and then to the water intake points. The power of the units is 3-20 kW, single and three-phase connection is possible.
2. Free-flow. Designed to service one point of water consumption - water from the mini-boiler is immediately transferred outside through the tap. The power of the devices is 2-8 kW.

With a sharp drop, the flow of water through the gravity module will slow down - there is a high probability of very hot water at the outlet. In devices with a thermal sensor, this problem is solved.

Criteria for choosing an electric heater for a tap

Having decided on the type of device, you should calculate the appropriate power of the module and compare the technical and operational characteristics of different models.

Unit power and performance

The decisive factor when choosing a flute is its power indicator. The required value is determined based on the priority purposes of use: kitchen sink, bathroom sink, etc.

When using an instantaneous electric heater for several points of water consumption, the final power is selected according to the maximum water intake. The table shows the approximate water consumption for different needs.

Power is determined by the formula:

W \u003d V * (T2-T1) /14.3where:

• W is the estimated power of the portable heater, kW;
• V - water flow rate or unit productivity, l / min;
• T2 - the desired temperature, depending on the needs, C °;
• T1 - tap water temperature (summer value - about 15 ° С, winter - about 5 ° С);
• 14.3 is a constant.

If simultaneous consumption from several water points is planned, then the final indicator increases by 1.5 times.

Calculation example. It is required to select a spout for a kitchen sink, the optimum temperature for use is 45 ° C. Based on the table, a model with a capacity of 4 l / min is suitable under the sink for washing dishes. For the objectivity of the calculation, it is better to use the average annual temperature of the water in the pipeline - about 10 ° С.

W \u003d 4 * (45-10) / 14.3 \u003d 9.79 kW.

The capacity of the hot water supply module is calculated using the inverse formula. The more power of the unit, the more warm water it will give out. However, the load on the network will increase significantly

Having selected the power of the heater, an important question arises: will there be enough electrical wiring capabilities? In old buildings with 16 A plugs, a flow pipe with more than 3.5 kW cannot be installed. New houses with 32 A and 40 A meters will "pull" the water heater up to 6 kW.

Heating element type

The heart of the flow module is the heating element. In the classic version, the heating element is assembled in the form of a spiral to increase the water contact area.

The operation of the heating element in "standing" water is unacceptable - the absence of continuous washing with a cooling liquid flow and the accumulation of hot water will lead to its burnout

In addition to the spiral shape, the heating element can be made as a curved or straight tube with an electric heater enclosed inside. The water circulates through the coil. Closed heating elements cope better with the formation of scale.

The efficiency and durability of a heating element is largely determined by the material of its manufacture.

Possible options:

• Heating element with copper or anodized sheath - provide good heat transfer and protection against scale;
• ceramic tubular heater - highly efficient, durable and expensive;
• spiral blocks, protected by glass - belong to the premium segment, are not demanding in maintenance, when scale forms, they partially change the rate of heat transfer.

Spiral induction heat exchangers are considered the most technologically advanced solution. In addition to efficient heating, eddy currents induce vibration of the central core. This effect is the prevention of scale formation.

The degree of electrical safety of the device

In addition to the presence of built-in "protection group" elements, the outer shell must also comply with safety standards.

You should pay attention to two indicators:

• electrical appliance protection class against electric shock;
• iP index - marking of the body's protection against external influences.

The protection class reflects the requirements for connecting the heating module and how to avoid electric shock. For instantaneous water heaters, the protection class is characteristic - 1. Safety is ensured by compulsory grounding of current-carrying parts and basic insulation.

Interpretation of the IP index: the first value is the protection of the case against the penetration of solid particles, the second number is the resistance of the outer shell to liquids. For water heating taps, IP25 is considered sufficient

Consideration of additional parameters

In addition to the listed characteristics, when choosing a hot water supply module, you should consider:

• control method;
• body material;
• secondary functionality.

All the variety of flutes are divided into mechanical and electronic units. The former are otherwise called hydraulic. The mechanics are typical for budget class modules and devices in the middle price segment.

Usually, a three-stage switching of operating modes is provided with the possibility of adjusting the pressure, water temperature. Manually operated by means of a lever

Disadvantages of the method: impossibility fine tuning temperature regime and saving the selected parameters. The electronic mechanism, with the help of sensors and microprocessors, independently maintains the specified settings, adjusting the operating mode to the current indicators of network pressure and temperature.

The product is regularly exposed to high temperatures, chemical composition passing liquid. Therefore, the housing must be heat-resistant and strong enough. Enameled, polypropylene and copper "shells" have proven themselves well - materials are resistant to aggressive environments and temperature extremes.

Expensive models are equipped with an internal scale protection. The role of the barrier is played by the "anode", the life of the element is about 6-7 years

Some built-in minor functionality provides a comfortable use of the water heater.

Useful options include:

• the presence of an informative display, indication of the operating mode;
• limiting the heating and cooling temperature;
• possibility of programming;
• work with different power;
• color illumination.

Also, some manufacturers have equipped their products with a practical function - a child lock for the heater.

Brand models overview

Water heating taps of well-known brands are in special demand:

• Delimano (Ukraine / Italy);
• Supretto (China);
• Aquatherm (Russia);
• Rapid (China).

Delimano.The company offers an instantaneous water heater "Aquasystem". The module is presented in the form of a cylindrical block with a control valve and a spout.

Specifications: length of the gander - 22 cm, dimensions - 12.5 * 7 * 7 cm, body material - plastic / metal, pressure - 0.04-0.6 MPa. In addition to the thermo-valve, the kit includes: a connecting insert, a support ring, a gasket and a fixing nut

Distinctive features of Aquasitem:

• fast heating up to + 60 ° С;
• the presence of a temperature regulator;
• indicator light;
• connecting the cord from the back of the case;
• warranty - 365 days;
• estimated cost - 25-30 USD

Supretto.The valve is made of heat-resistant high-strength plastic, internal elements are metal. The device is equipped with the necessary safety system - the construct assumes grounding, protection against overheating.

Supretto performance depends on heating temperature. Without the heating function, the throughput of the device is 1.5 l / min, when heated to + 50 ° C - 1.3 l / min

There is an indicator on the front wall of the case, the control lever is located on the side. The cost of a miniature electrical appliance is about $ 30.

Aquatherm.Single-lever heating valve assembled in Russia. It features a high arcuate spout, a water filter and an Anti-Calcium option.

Additional characteristics: ceramic cartridge, crane angle - 360 °, overheating protection. Power supply parameters: frequency 50 Hz, single phase

The model is produced in 4 colors: blue, burgundy, white, beige. The price of the issue is 50 USD.

Rapid.Brand brand water heaters have multi-level protection. In economy models, the temperature is controlled by a joystick lever. In more expensive versions, the heating mode is controlled by an electronic sensor.

Features of Rapid flow valves:

• Heating element made of heat-resistant polymer;
• the heating ceramic disc can operate continuously for up to 5000 hours;
• heating temperature - 30-60 ° С;
• grounding of the main body.

In all models, the heating elements are protected with an insulating layer.

In some situations, a water heating tap is the optimal and only possible option for organizing hot water supply. In order not to be mistaken in the choice, you should really assess your own needs and calculate the required power. Important purchase criteria are the safety of the device and the reputation of the manufacturer.

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A long stay without hot water turns a person's life into a gray despondency. All people try to decide this problem, and everyone does it in their own way. Some people install a large boiler, others prefer taps with a built-in water heater.

The device is almost no different from a conventional mixer. Instantaneous valves are connected to a cold hose. Heating is carried out inside the equipment. Within 3-5 seconds, the water will be up to 70 ° C. It should be noted that the instantaneous electric water heater for the tap is made of a special steel alloy that does not corrode and does not form scale.

The device has 3 operating modes:

• "Off" - the handle is in the "down" position. Water does not flow, electrical circuits are de-energized.
• "Cold" - the lever is in the "left" position. The power grid is disconnected, and normal room temperature water is running from the tap.
• "Hot" - the handle is turned to the right. The electrical system is turned on and within a few seconds hot water begins to flow from the tap.

There are mixer models in which the temperature controller is located outside the structure. It is convenient - the electronics controls all the necessary parameters.

Advantages and disadvantages

The advantages include:

• Fast heating of water. Hot liquid will be dispensed within 5 seconds after switching on.
• Excellent technical characteristics of a cold water heater for a tap in a bathroom or kitchen. Liquid temperature - up to 70 ° C, good head, compact size, local area of \u200b\u200buse.
• Constant temperature. There will be no hesitation in the direction of the appearance of boiling water or, conversely, the flow of too cold liquid.
• Perfectly fits into any interior and will never spoil the appearance of the room.

The flow-through heater, which is put on the tap, has almost no drawbacks. We can only note the high energy consumption - 3 kW per hour. Another drawback is low throughput (up to 6 liters per minute). However, this indicator is quite enough to fill a bath or wash dishes in the kitchen.

Overview of faucets made in China with heating function

Before purchasing these devices, you need to pay attention to the power consumption. This indicator should be minimal, since the lower it is, the more resources will be saved, and hence money.