Geyser Michelle characteristics. Which geyser is better - the main selection criteria

Instantaneous water heater Ariston Fast Evo 11B has a relatively small physical size. It can easily be installed on the wall of a bathroom or kitchen. The device operates using batteries, so it does not depend on electricity. Thanks to the switches, comfortable operation is possible. The device cannot overheat due to special protection. There is a flame control sensor, and Maximum temperature water heating is 65 degrees. It is worth noting the open combustion chamber. The water heater will fit perfectly into the interior of a modern home.

Pros:

• Simple and intuitive operation of the device.
• Compact model with attractive design.
• Quiet and efficient geyser.

Minuses:

• Doesn't light up fast enough.

1 Ariston Gi7S 11L FFI

Probably everyone knows common Since ancient times, the expression: “my home is my fortress.” You can, of course, put a variety of meanings into it. But if you look from an everyday point of view, from the position of a caring and economical owner, then this can be perceived as a desire for the greatest possible autonomy, for independence from public utilities with their unpredictable quirks in the form of changes in the conditions for the provision of services, tariff increases, supply failures, preventive work, repairs, accidents and the like.

It is no secret that not only the owners of private houses, but also the owners of apartments in high-rise buildings in Lately Increasingly, people are installing their own independent home heating and hot water supply systems. About heating boilers - in a separate publication, and this article will be devoted to questions of how to choose a gas water heater so as not to have problems providing your household with hot water.

But even before the speech will do about the problems, in fact, of choosing these devices, you need to, at least briefly, familiarize yourself with their basic structure. This is necessary, first of all, in order to try to dispel a number of fairly common prejudices that were formed in the collective consciousness regarding speakers quite a long time ago are firmly entrenched there and are very difficult to “neutralize.”

The design of a geyser and its advantages

In order not to make mistakes when choosing such a heating device, it is necessary to at least approximately understand its structure. Although the range of modern geysers is quite large, their work uses the same principles and internal structure, and functionality.

The diagram shows the approximate structure of a typical modern flow-through gas heater. Of course, specific models from various manufacturers may have their own characteristics, but only in matters of layout or ease of use.

1 – fume hood, closed with metal walls, a volume from which gas combustion products are removed in one way or another. It can be completely sealed or connected to the atmosphere (in conventional, chimney or chimneyless columns).

2 – copper heat exchanger. A pipe system with a “jacket” that receives the direct impact of the flame of gas burners. This is where the heating of running water takes place.

3 – ignition sensor. Provides a control signal to open the common gas solenoid valve only if the ignition wick is operating.

4 – ignition wick. May be different principles actions - this will be discussed below.

5 - gas burner, more precisely, several lines of gas burners, providing0 their uniform heating of water in the heat exchanger.

6 – water unit, which includes, among other things, a fitting for connecting a cold water main (pos. 9), a screw water flow regulator (pos. 9, not for all models), and a drain valve (pos. 10, also optional, not on all speakers).

Water valve - “frog”

The main element of a water node is always so-called "frog".

In essence, it is a working cylinder, the volume of which is divided into two parts using an elastic membrane.

Both halves of the “frog” are connected to each other by a fitting of a certain diameter. The point is that when water is opened through the column, due to the pressure difference in the two parts of this “frog”, the membrane bends upward and pushes the rod, which is connected to the spring-loaded gas valve, opening it. As soon as the water flow is stopped (the water tap is closed), the pressure under the membrane drops, the valve returns to initial position, and the gas burner, accordingly, immediately goes out.

11 - in this diagram - a unit with microswitches (optional).

12 – gas block with gas hose connection fitting (pos. 13). This is where the spring-loaded gas valve is located, connected by a rod (rod) to the water unit.

14 – in this column – the electronics unit that controls the operation of the water heater. In inexpensive simple speakers it may simply be absent. Pos. 8 – compartment for batteries (batteries) necessary to generate an ignition pulse on the igniter.

15 – connection fitting to the hot water distribution line.

16 – mechanical regulator that switches operating modes, controls the levels of water flow and gas supply. In modern speakers it can be completely replaced by an electronics unit, with control signals transmitted through push-button or touch control panels.

17 and 18 – cascade of column operation sensors. The specific “filling” may be different - this will be mentioned below in the article.

As already mentioned, any model may have its own distinctive features , But basic principle the buildings all remain the same.

The diagram for connecting the column to the water supply pipes, regardless of its model, is the same for everyone - it is shown in the figure.

So, when you open the water at the hot water tap, water from the cold main begins to flow through the column. The pressure of the water flow opens the gas supply valve, which causes the burners to ignite (more on the ignition mechanism below). The energy of the combustion gas is converted into heating water - and water flows at the required temperature from the “hot” taps on the mixers.

This is one of the main advantages of a geyser - it works exclusively at the moment when it is required hot water, the rest of the time being in “standby mode” or in the off state. The owners of the house (apartment) use hot water only when needed, and at the same time do not depend in any way on the operation of the boiler rooms.

The second main advantage is, of course, operating costs. So far, at a cost of natural gas no other energy carriers can compare.

The speaker, of course, also has disadvantages, and considerable ones.

• It will not be possible to install it on your own - coordination with the relevant organizations, drawing up and approval of projects is required (unless, of course, the house was previously equipped with such water heaters).
• The operation of the dispenser, even in its most modern version, still requires all residents to comply with certain safety rules.
• A stock of heated water is not created, unlike an electric or gas boiler.
• The initial installation of the column may involve very large-scale work to ensure the removal of combustion products or to create forced ventilation.

It should be noted that the designers of geysers managed to solve most of the “old problems” of gas instantaneous water heaters. Nevertheless, a certain number of people still have some kind of bias towards them. Therefore, in the next section of the article we will try to take a closer look at modern speakers precisely in the light of persistent myths about their danger or inconvenience.

Video: general structure of a typical gas water heater

Modern geysers – should we be afraid?

An interesting feature of geysers is that, willingly or unwillingly, they can even change demand, and therefore prices, in the secondary housing market. Realtors won’t let you lie - very often one of the main issues during the initial consideration of proposals is connecting the house to a centralized hot water supply and, accordingly, the presence or absence of gas water heating columns.

It is characteristic that there is no unity of views on this issue. Of course, people who have been tormented since childhood by old Soviet water heaters, with their whims, noise, unsightly appearance, with constant “pressure” from elders about strict rules of use and the danger of violating them, do not want to hear about purchasing an apartment with gas water heaters .

However, there is also the opposite category - people who are already familiar with the fickleness of public utilities, with inflated tariffs and payment by meters for hot water (moreover, in order to wait for the first drops of hot water, it is often necessary to pour at least 3 ÷ 5 minutes of cold water, since the circuits circulation in many multi-storey houses are simply cut off). And such experienced clients, on the contrary, will be more satisfied with housing with a speaker. However, many people prefer to combine both possibilities - this is the most reasonable approach.

What are the main “myths” about geysers that continue to live, scaring away potential buyers of such equipment?

1. The column is very difficult to operate; it requires independent ignition with matches and constant monitoring.

Let's figure it out.

Well, firstly, any technique requires control, regardless of complexity. No one blames the gas stove with its open flame for this, or the faucet in the bathroom, which also needs to be monitored so that it does not leak over time.

Secondly, lighting with matches can only be found on those very “rarities” of the Soviet installation. Perhaps they are still produced somewhere, however, all, without exception, modern models worthy of mention are fired up differently.

— The simplest, “imperfect” modern speakers are equipped with piezo ignition. Before use, it is necessary to light the igniter wick by pressing the corresponding button, while turning the control handle to the appropriate position. Even this scheme is considered “outdated”, is used less and less and is giving way to other principles of ignition.

— Electric ignition is popular. At the moment the water starts, a sensor is triggered, which gives a signal to the electric igniter. At the same time, a channel for limited gas supply to the torch opens and a spark is generated to ignite it. The energy for sparking comes either from installed batteries (usually 1.5 or 3 volts) or from the power supply.

— Another modern method is the “HidroPower” system. In the supply pipe cold water a hydraulic turbine is built into the column. At a certain liquid pressure (usually about 0.3 - 0. 5 bar) the turbine induces an electrical charge sufficient to produce a spark for ignition of the igniter torch, which then it will transfer the fire to a common gas burner.

All this takes a long time to read - but in fact, the process of automatically igniting the flame when water is turned on occurs within just a few seconds.

So, in modern water heaters, no special human intervention is required (except for first opening the gas tap): turn on the hot water and use it.

By the way, you can immediately give an answer to a possible problem - why do you need an ignition burner (torch) at all? Surely it’s impossible to immediately ignite the main one?

It is forbidden! Until the torch warms up the sensor, the gas start solenoid valve will not operate. The very small amount that is taken at the moment of starting on the wick does not pose any danger to people - it will easily escape into the ventilation. But if suddenly the column accidentally goes out, the sensor has cooled down, then the gas supply will be blocked - the solenoid valve will close the line completely.

2. It is a very common belief that the column is a very explosive device.

What could explode there? If we are talking about gas, then it is no more dangerous in this regard than a regular gas stove. In the same way, provided that there is no leak, ventilation is normal, there is no place for an explosive concentration of gas to come from.

If we talk about the likelihood of an explosion of an overheated volume of water, then a boiler in this regard is probably even more dangerous. In the column, with its flow principle of operation, there are much fewer such conditions for an explosion. Moreover, in any (even the oldest and most imperfect) there are always at least two lines of “defense”, about which at same mentioned: an electromagnetic valve, which will not allow the burner to ignite independently, and a “frog” water valve, which shuts off the gas in the absence of water flow.

3. The fear is somewhat similar to the second point: there may not be an explosion, but a gas leak will lead to poisoning and a sad outcome.

You can refute it by citing all the same arguments that were presented two paragraphs above. And we can only add once again: the degrees of protection of a conventional gas stove- much less, and the likelihood of a gas leak from the stove or oven into the living quarters is much higher. Nevertheless, for some reason, they are more afraid of gas water heaters in this regard, although this is completely illogical.

4. Another very persistent, but completely incomprehensible prejudice is that a gas water heater will completely ruin the interior of the kitchen.

Probably, only someone who can’t get the image of an old, rust-covered ancient pump with metal pipes leading to it in his imagination, can say this only.

Blaming modern geysers for being unsightly is the same as making similar complaints about refrigerators, microwaves, hoods, ovens, etc. Gas water heaters They fit perfectly into the kitchen decor, take up very little space, and sometimes stand out against the general interior background just by the presence of a chimney. (and even then - not always).

What Another thing to consider when choosing a column

So, we come to a common opinion: there is no need to be afraid of geysers, they should become reliable and safe helpers in the household. This means that we should take a closer look at the criteria that should be taken into account when choosing this device in a store.

Gas water heater power

Under this parameter lies the ability of the geyser to heat a certain amount of water per unit of time to the required temperature. In general, the entire variety of these devices can be divided into three classes:

Low power geysers. The rating does not exceed 19 kW, and such a water heater is capable of serving only one point of consumption at a time.

Medium power speakers include devices rated from 20 to 28 kW. Usually they are already enough to simultaneously draw heated water in two places.

The most powerful are geysers that produce 29 kW or more. Their performance is even enough to take a bath in one place with simultaneous, for example, washing dishes in the kitchen, or with simultaneous using hot water in three places is quite enough for any “everyday” situation, even in a large country mansion.

It may be objected that kilowatts, although they are indicated in the product passport and on the information plate on the case, still mean little to the average user. It’s difficult to argue with this, so we’ll try to explain this meaning more clearly.

The main purpose of the column is to raise the water temperature from the initial value ( TVx) to what is necessary for domestic use ( TN). The difference between these two values ​​(delta) will show what our water heater is capable of.

ΔТ = Тн - Твх

The “delta” itself is not interesting - you need to know how much water the column can heat for such a difference per unit of time. (usually measured in liters per minute).

How to determine the required power?

It can be taken as a statement that for the normal functioning of a kitchen sink, about 4 liters of heated water per minute are required. For taking a shower, 6 liters is usually enough. (These values ​​have been tested in practice, and, by the way, they are what are used to guide the development of special economizer devices in the form of aerators or special fittings, which, even if desired, do not allow the use of larger volumes, thereby helping to save water).

The power of the required water heater can be calculated using the formula:

М = ΔТ × Σv/14.3

M – required power,

ΔT– heating value (see above)

Σ v– total volume of simultaneous consumption;

14,3 – coefficient taking into account the heat capacity of water.

Let's assume that a column is selected that allows simultaneous use of a shower and sink in the kitchen. The total volume will be Σ v= 4 + 6 = 10 l/min.

Magnitude ΔT– depends, of course, on the inlet water temperature. If we assume that water comes from a water supply with a temperature of about 10 - 15 ° WITH, then a rise of 25 degrees should be quite acceptable - the output will be about 40 ° WITH, which is enough for both taking a shower and washing dishes.

In total we get:

M = 25 × 10 / 14.3 = 17.4 kW

It is clear that this value is the lower acceptable limit. It is recommended to add another 15 - 20% reserve to it, and then round up to whole numbers. We get 21 kW. The speaker you purchase must have this power. Of course, all models of water heaters have their own gradations and capacities, but you need to buy one so that the value is not lower.

Perhaps this may seem too complicated. In addition, the initial temperature value may be different, for example, in winter time the water may have about 5 degrees at the inlet. In order not to force readers to “suffer” with formulas, it is better to provide a table in which the power of the column will be linked to the inlet temperature and the overall performance of the device, provided that it supplies water to the mixer at 40 ° WITH:

Usually both power and ΔT are the basic values ​​of the water heater and must be indicated in the technical documentation.

And the most accurate calculation using the same formula will be possible with the proposed online calculator.

Using it is easy.

• First, the temperature that is planned to be obtained at the output of their column is indicated. At the discretion of the future owner - for some, 40 degrees is enough, but maybe someone wants it cooler or, conversely, hotter.
• The next step is to indicate the temperature of the water supplied to the column. Here you can proceed either from existing circumstances. For example, from some sources - wells, boreholes, storage tanks Water is supplied regardless of the time of year, always at approximately the same temperature. And you can calculate for the most unfavorable conditions, when the water is so cold in winter that it is close to the freezing line.
• Next, you need to indicate (check the boxes) those hot water collection points that, according to the owners, can be used simultaneously without interfering with one another. Of course, if you supply water to all plumbing fixtures at once, then you probably won’t find such a powerful device.

But this is all decided at home, so to speak, by administrative methods. And it’s difficult to imagine a situation where one family member, for example, is washing dishes in the kitchen, a second one is standing in the shower at the same time, a third is taking a bath, etc. And the calculator, by the way, will help you fully imagine what can be used at the same time.

• All other values ​​- the average statistical consumption at points of consumption and the heat capacity of water - have already been entered into the calculation program.
• All that remains is to press the “CALCULATE…” button - and the answer will be given, expressed in kilowatts of the required thermal power of the column. In addition to the calculated value, another one will be shown - taking into account the 15% power reserve, since “driving” the water heater to the limit of its operating capabilities is far from the best solution.

Calculator required power geyser

A gas water heater in an apartment or private house allows you to provide residents with hot water at any time. In addition, it makes it possible to save money, since heating occurs only as needed and paying for gas is cheaper than for hot water from a central water supply. Considering the potential danger of such equipment, the choice must be approached very responsibly. A cheap, low-quality, defective or counterfeit speaker will pose a threat not only to property, but also to people’s lives. The following is a rating of geysers in terms of reliability and quality in 2018 according to the Marka.guru portal.

To decide which geyser is better, take into account the following features of water heaters:

1. Water heater type. There are flow-through (columns) and storage (boilers). The first ones have compact dimensions, but at the same time must have high power. The second type has a storage tank, the volume of which can reach 500 liters. It is advisable to have this type in a private home.
2. Performance. The power of the column determines how much water it can pass per unit of time. On average, a productivity of 10-13 liters per minute is sufficient for an apartment.
3. Possible pressure, for which the water heater is designed. We are talking about the minimum required pressure to turn on the column, as well as the maximum that it can withstand. These indicators directly affect the reliability of the device.
4. Ignition type. Older systems use a manual or electromechanical type, while modern ones use electronic control. In this case, power can be supplied from electrical network, from a battery or can be powered by a hydrogenerator. The latter type is rarely used due to its high cost.
5. Availability of power regulator. Allows you to change the combustion intensity depending on the water pressure.
6. Heat exchanger material. Can be steel or copper. It is better when purified copper is used, since the presence of impurities impairs heat transfer.
7. Carbon monoxide removal. It can be carried out into the chimney or through a hole in the wall to the street using forced ventilation.
8. Safety. The best geysers have various sensors and automatic shutdown systems when conditions arise that create a danger in using the device.

1. Mora Vega 10

Easy to use and very compact water heater suitable for an ordinary city apartment. It is capable of operating at system pressures from 0.2 to 10 atmospheres. It turns on using electric piezo ignition. Heating capacity reaches 10 liters of water per minute. The boiler has the highest efficiency in its class, reaching 92%.

Column answers everyone modern requirements security. The burner turns on and off automatically depending on the water supply. If the gas goes out or the temperature sensor network is disrupted, the gas supply will be closed. The water temperature limitation system ensures that it does not overheat excessively in the heat exchanger. If combustion products enter the room, the backdraft fuse will trip and the water heating will be turned off.

The innovative design solution of Metrik fittings allows you to use the column with low water flow, maintain the set temperature even with pressure changes, and also avoid leaks.

Advantages:

• stable and reliable operation;
• fast heating;
• ability to regulate temperature;
• availability of automatic security control systems;
• The design prevents salt deposits and clogging of the system.

Flaws:

• insufficient water heating in the cold season;
• high price.

The average price is 19 thousand rubles.

Prices for Mora Vega 10:

2. Roda JSD20-T1

The German water heater Roda JSD20-T1 has closed chamber combustion, carbon monoxide is removed outside using a fan, air is also taken from the outside. It has excellent performance at pressures of 0.3 atm and can withstand a maximum of 7 atmospheres. The efficiency is 85% and also has a good output of 10 liters per minute.

Unlike the previous model, Roda JSD20-T1 is equipped with electric ignition. The igniter turns on automatically when water is supplied. The device has a draft sensor and an automatic shutdown system if problems arise with ventilation or smoke removal. Shutdown also occurs when the heat exchanger overheats. If the flame suddenly goes out, the gas supply will be cut off. A special safety valve is provided to protect against overpressure.

The frost protection system automatically turns on the heat exchanger heating if the temperature in the water heater drops below 5 degrees Celsius.

Advantages:

• quality and reliability;
• high level of security;
• the ability to regulate not only the temperature, but also the power of the burner;
• The heat exchanger, resistant to corrosion and overheating, guarantees long-term operation even under intense loads;
• closed combustion chamber;
• safe coaxial chimney included.

No deficiencies found.

The average price is 11 thousand rubles.

Prices for Roda JSD20-T1:

The Halsen WM 10 geyser, made in Russia but assembled in China, is capable of operating in systems with low pressure of 0.3 atm, while at the same time withstanding up to 8 atmospheres. Automatic electric ignition powered by batteries. In general, it is a completely modern and safe device. Capacity 10 liters per minute. There is a shutdown when the burner goes out and the heat exchanger overheats.

The heat exchanger is made of oxygen-free copper.

Advantages:

• good performance and efficient work;
• modern design;
• temperature and flame level adjustment;
• low cost.
• No deficiencies found.

The average price is 8 thousand rubles.

Prices :

Almost all models of the Italian brand Zanussi have electric ignition, powered by batteries, and the GWH 10 Fonte is no exception. The heat exchanger has an anti-corrosion coating, and the nozzles are made of stainless steel. If you replace them, you can reconfigure the boiler to work with gas cylinders. Rotary controls allow you to adjust the burner power and water temperature, and the current status is shown on the display.

The display only works when the hot water is on; in the standby state it turns off.

For safe work Water overheating and carbon monoxide sensors are used. Open camera combustion, productivity up to 10 liters per minute. Can operate at system pressure from 0.15 to 10 atmospheres.

Advantages:

• economical gas consumption;
• compact;
• low price.

Disadvantages: there is no smooth regulation of heating during pressure changes.

The average price is 5400 rubles.

Prices :

5. Mora Vega 13

This model is practically no different in functionality from the leader in the rating. The same security systems and adjustments are present. The column is also suitable for use with low water pressure from 0.2 atm and has a high efficiency of up to 92%.

Its distinctive feature is its high productivity, which reaches 13 liters per minute, and, accordingly, a higher price.

A column capable of smoothly maintaining power and maintaining desired temperature water regardless of differences in the system. There is also piezoelectric ignition; to remove carbon monoxide, a chimney diameter of 135 mm is required.

Advantages:

• stable heating and temperature maintenance;
• safety;
• fast heating;
• power;
• efficiency.

No flaws found, good value for money.

The average price is 21,000 rubles.

Prices for Mora Vega 13:

The Gorenje GWH 10 NNBW flow-through gas water heater can operate at pressures from 0.2 to 10 atmospheres. Ignition occurs automatically when water is supplied. The model provides separate adjustment of the water and gas supply, the temperature is easily adjusted and smoothly adjusted. The required chimney diameter is 110 mm. Efficiency is 84%, productivity is 10 liters of water per minute. There are the necessary protection systems with automatic shutdown. The column provides instant water heating with high efficiency and has a modern design.

The kit includes a set of filters for water and gas.

Advantages:

• safety;
• smooth heating;
• convenient adjustment;
• easy installation;
• works well at low pressure.

Disadvantages: according to some reviews, it is noisy.

The average price is 7300 rubles.

Prices :

7. Bosch WR 10-2P

The Bosch WR 10-2P model is designed for a capacity of 10 liters per minute and has piezo ignition. This is a very popular model, as is the brand as a whole. Good decision for small-sized housing, when consuming water in the sink and shower. Equipped modern systems safety, and the period of continuous operation is not limited in time. The set water temperature is maintained even when pressure changes. There is a sensor for protection against overheating, as well as against exceeding the concentration of carbon monoxide. If a threat to operational safety arises, shutdown occurs automatically.

Bosch WR 10-2P operates at an exceptionally low pressure of 0.1 atm.

Advantages:

• uniform heating;
• high-quality execution;
• efficiency;
• can work from liquefied gas;
• safety.

Flaws:

• mechanical ignition;
• In some cases, water leakage has been noticed after several years of use.

The average price is 10,000 rubles.

Prices for Bosch WR 10-2P:

This model from Bosch has the same capacity of 10 liters per minute, but has electric ignition from batteries. Operates at low pressure of 0.15 atm. It can operate on both natural and liquefied gas. Efficiency reaches 88%. The column is equipped with flame control sensors, carbon monoxide removal, overheating protection and heating temperature limitation. Manual regulation of water flow and gas power is carried out separately.

Advantages:

• electric ignition;
• operation from cylinders is possible;
• low price.

Disadvantages: noisy when ignited.

The average price is 8300 rubles.

Prices :

9. Bosch WRD 13-2G

Bosch WRD 13-2G is a model with a hydrogenerator for automatic ignition. A special turbine rotates from the flow of water, as a result of which electricity is produced, which is the power source for ignition. This model is average in performance in the “6000 O” line, providing a heating rate of up to 13 liters per minute. Ease of operation is complemented by a multifunction display. The boiler perfectly provides water consumption in the kitchen and bathroom. When replacing the burner, the model can be reconfigured to operate on liquefied gas.

It turns on at a minimum pressure of 0.35 atmospheres.

Advantages:

• modern type of ignition;
• simple controls;
• fast heating.

Disadvantages: noise of the hydrogenerator.

Prices for Bosch WRD 13-2G:

The average price is 17 thousand rubles.

The compact water heater of the Korean brand is designed for one water intake. A special feature of the model is automatic ignition and smooth adjustments. The display shows the current water temperature as well as error messages. This simple model without any special features is well suited for Russian conditions operation, since it is capable of operating at low water pressure from 0.15 atm. Provides a capacity of 10 liters per minute. The heat exchanger is made of copper.

Advantages:

• small sizes;
• stylish design;
• easy installation;
• low price.

Disadvantages: ignition batteries run out quickly.

The average price is 6 thousand rubles.

Prices :

Conclusion

As you can see, the price range for instantaneous water heaters is very high. Typically, cheap speakers are less powerful and are designed for low water consumption. If the family is large and there is more than one water intake in the apartment, then you should choose a more expensive heater. It is difficult to talk about the advantages of any brand, since much depends on the assembly. In addition, there are often fakes or defective batches on the market, especially for well-known manufacturers.

The type of ignition is also a matter of individual preference. Automatic is convenient for most consumers, but many believe that it breaks down faster. And if the power comes from batteries and not from the mains, then there is a need for periodic replacement. But there is no need to connect the device to the network. So final choice geyser will vary depending on preferences and conditions of use, and the rating according to the Mark.guru portal will help determine and compare best models for a combination of reliability and quality.