In most regions of Russia, all residential and industrial premises must be equipped with a heating system. In some areas of our country, the temperature drops to -50 degrees. And then the word "heating" acquires a vital meaning.

Within the territory of Russian Federation There are two heating systems:

• centralized;
• autonomous.

This heating system is used in large cities and small settlements with multi-storey buildings. The principle of operation of such a system is simple.

From the name it becomes clear to us that the source of heat is the central, or boiler room. The mains of heat pipelines depart from it, through which thermal energy is supplied to end consumers.

This system has low efficiency. Due to the severe deterioration of boilers and heat pipes, there may be large heat losses in environment.

In addition, the consumer does not have the ability to regulate the supply of heat to his apartment.
With the advent of temperature controllers, it became possible to change the level of heat that enters the heat emitter. However, the monthly cost of utility heating costs does not change in any way.

Dignity

This system has one advantage, which is still a decisive factor: it is safety. The consumer does not need to think about how to repair it and monitor its work around the clock. All automation is installed in only one place. And there are competent people who are specially trained to work with these units.

In the event of an accident, a special team will move forward to eliminate it, and the end user, most likely, will not notice this, since his trunk will be directed along another line. And certainly he does not rack his brains on how to fence off his home from defrosting heating.

Autonomous heating system

As a rule, autonomous heating consists of several main parts:

• the boiler is a source of heat;
• pipeline - transfers the coolant to heating radiators;
• expansion tank - the coolant has the properties to expand when heated and narrow when cooled, all this compensates for the expansion barrel;
• - forcibly forces the coolant to circulate through the system.

All these components of one whole, which is called an autonomous heating system. It can include and complement each other many more different elements, which will be described below.

Advantages and disadvantages

This system has many advantages. The most important thing is the ability to completely and completely influence the operation of the unit. If it is warm outside, we turn off the boiler and the energy consumption stops.

Also, with proper thermal insulation of the room, the autonomous system works cyclically, that is, it heats the room to a predetermined limit, and then turns off.

The cost savings on resources is much greater than that of central system, since all units are located inside the heated room, there is no heat loss to the environment.

Let's also point out the disadvantages. Equipment is expensive. Requires some skill to use. When the system fails, emergency situations are possible. Boilers mainly operate on natural gas, and this is already a fire and explosion hazard, which requires special requirements for the boiler room.

Causes of remote control and heating management

All these shortcomings are not so noticeable in residential apartments or houses with a permanent stay of people. When a malfunction occurs, it is quickly detected and localized. But what about?

Now it has become very popular to go out of town for the weekend to rest. People try to leave the stuffy and noisy city. But this is only possible in summer time, but what about in the winter, when nature is no less beautiful?

There is only one way out - to heat the room. A lot of problems immediately arise, a lot of time is spent on heating the home, and somehow you need to maintain heat in the house at night. Solving this problem, modern science and the technique finds a rather innovative solution - control using GSM signals.

GSM Automation Capabilities

The system itself solves the following tasks that were previously impossible to do.

Situation #1. You need to come to a country house that has been empty all week. On the way to it, you send an SMS message, or through a special application, a signal for heating the house. The module processes the information, starts the boiler and switches to the room heating mode. By the time of arrival, the room will already have a pleasant microclimate.

Situation #2. You are away for a week country house. The boiler is operating in economy mode. At the same time, the minimum temperature at which the coolant does not freeze is maintained.

Suddenly, the boiler fails, the temperature drops rapidly. GSM module receives information about this through thermal sensors located throughout the house. You receive a notification on your mobile device, and you decide to remotely restart the boiler.

As in the first case, send the appropriate control signal. If the restart of the boiler is successful, then the problem is solved. Otherwise, you should start the emergency heat source and call a repair team that specializes in these types of boilers.

This prevents a complete freeze of the system and deplorable and often irreparable consequences.

Situation #3. You need to know about the condition of your home. In the application, you send a test signal to the module in the controlled house. In response, you receive complete information, such as:

• temperature level inside the room;
• coolant temperature;
• air humidity.

After making sure that everything is in order with the house, we forget about the anxieties that visit us.

Situation number 4. There has been a break in the fuel line or a leak in the system itself, a dangerous concentration of gases begins to accumulate. The system informs you about this. And then we act according to the circumstances. You can transfer the system to an emergency source of heat, thereby turning off the boiler and, upon arriving at the place, call the emergency service.

Situation number 5. There was an emergency in the house and a fire broke out. Thermal sensors record the high temperature, about which you are immediately informed. The next step is to call the rescue services.

Types of GSM control

Install in home gsm-controller, which will perform only informational functions. Upon request, it will provide information about the state of the premises via SMS.

Install a gsm socket that monitors the surrounding space. If the parameters deviate from the norm, it will send an alert to the mobile device and start the electric convector connected to it. Usually such a device is called a "smart plug".

Install a gsm controller in the house and a gsm module on the boiler. This system has all the features of the first example, and also allows you to control the boiler remotely. In non-standard cases, you can start or turn off the boiler remotely, as well as control its operating modes.

Control system

In general, the system consists of a gsm controller. This is a portable computer that is designed to collect and process information from a variety of sensors. It also has a GSM module installed, it is he who is responsible for receiving and transmitting data.

Sensors are responsible for measuring the external parameters of the house. These can be temperature sensors, gas sensors, fuel level sensors, etc. They are the eyes and ears of the controller.

Gsm boiler module. This is the most expensive part of the control system. It is designed specifically for a specific boiler. Thanks to him, the operating modes of the boiler are controlled.

Peculiarities

One hundred percent working system of remote control of the heating system and the entire heating system should be formed at the design stage, since most boilers do not have any possibility of remote control. If you initially select all the components, then this will be a guarantee for the correct and safe operation in general.

Since the full automation of the heating system is a complex and high-tech process, the design and installation should be entrusted to specialized companies.

Of course, you can install it yourself, but since most of us do not have the proper knowledge in this area, you should seek help from professionals in installation.

Summarizing all the information, it is worth noting that modern technologies have stepped far ahead. You have to wait until the full automated system heating, which will be entirely controlled using mobile gadgets.

Today, the system as a whole allows you to solve many problems in the heating system.

Modern technologies allow you to perform many actions remotely, turning on / off various equipment. For this, wireless telephone networks are used. One example of such a symbiosis is gsm heating control. Thanks to him, it is possible to choose the optimal operating mode of the equipment, being many kilometers from home.

For control, a cell phone located at the owner of the house is used. The equipment located in the building must contain a special controller with a gsm module, what it is, we will describe further. In addition to management, the owner can have current information about the state of the system on the screen of his phone.

Appearance and equipment

Different module models may include a variety of basic functions:

• start and stop the process of heating the coolant;
• correct the current value of heating the coolant;
• synchronize the current heating parameters with the actual external temperature situation.

Boiler remote control system

The boiler remote control kit includes the following components:

• gsm temperature control;
• several voltage sensors;
• temperature sensors.

The controller is connected to the operation of the boiler automation. A standard slot for installing SIM cards of different operators is mounted in its side panel.

Controller instances that have several mobile card slots are more reliable. By inserting SIM cards of different operators into them, it will be possible to reduce the risks that appear with poor communication or poor-quality coverage of telephone companies.

In order for the heating control via gsm communication to be carried out efficiently, an independent battery is built into the controller large capacity. He is able to command the boiler even when the general power supply in the house is turned off.

VIDEO: Heating control from a mobile phone OSA-Kotel

Connection methods

When analyzing what a gsm module is, you should pay attention to the options for connecting the unit to a ready-made working or mounted heating. The boiler is first disconnected from the power supply.

Subsequence gsm connections controller for heating control consists of the following steps:

• Mounted sensors to which the controller will be connected.
• With a SIM card, you will need to carry out some preparatory procedures. The PIN verification feature must be disabled. Important phone numbers are written in the card directory. The device will be able to send important messages only to a limited list of phones.
• The SIM card is placed in the controller.
• You will need to set a password for the machine used for remote control.
• An emergency phone number is fixed, which will receive short messages in case of emergency events.
• The available default settings will allow you to receive information about the current state after the boiler is started.

For the SIM card to work correctly, you need to take care of a positive balance on your phone account. Only after that, heating control in a country house via gsm will become fully available.

VIDEO: Instructions for connecting the GSM module to the boiler

The subtleties of the application of systems

Installation of gsm automation for temperature control in a country house or your own apartment can be carried out independently on any type of boiler with different kind fuel. The process takes into account the individuality of each system, optimizes the consumption of resources and sets the most comfortable mode of operation:

• Solid fuel boilers on pellets. In them, granulated raw materials have the ability to be fed into the furnace automatically. When controlling such a boiler via gsm, the electronic module will send a signal about power outages or attenuation of fire in the furnace.
• Electric boilers. The wireless control access unit monitors the voltage level in the circuit. If necessary, he will be able to give a signal, for example, when there are interruptions in the supply of current or with a significant increase in voltage.
• Diesel boilers. They are often used in large industrial buildings. Often, a heating complex includes several heating units. You need to know that this gsm module will be able to concentrate incoming information from several points in a single center, reducing the need for maintenance personnel to one person. In automatic mode, the control point will receive information about the need to refuel working tanks with fuel.

Positive qualities and wide functionality of gsm modules

Remote control has its positive characteristics, which are expressed in the following features:

• It is allowed to connect several telephones to the information and control device, through which commands will be given.
• You can receive information on demand from any sensors built into the fuel equipment. They provide up-to-date data on input, output and operating parameters in real time.
• The owner of the equipment has the opportunity to give almost any commands to the units connected to the network from anywhere in the world remotely

• In emergency situations, the automation itself will send a signal to the owner about overheating, fuel leakage, attenuation, etc.
• Additional functions are easily connected to the module in the form of opening the gate via SMS, checking the smoke level in the room, etc.
• Thanks to the built-in independent gsm batteries, the equipment can be controlled (for a limited time) when the centralized power supply is turned off.
• The electronic unit has protection against unauthorized access. It is implemented in the form of a secret PIN code, which will need to be updated regularly.

It is worth mentioning some of the cons gsm operation modules:

• High cost of equipment. The price tag of a module with the installation of auxiliary options is comparable in some cases to the cost of some boilers. However, compensation for such financial expenses will be more economical consumption of fuel and electricity. It will be possible to minimize costs with self-assembly.
• Older models of gsm modules do not have the function of switching off / on the boiler. Modern blocks are devoid of this drawback.

For stable operation, you will need to choose a reliable mobile operator. Devices with several slots for SIM cards will help reduce the risks of poor-quality communication.

VIDEO: Heat informer Teplocom GSM boiler control from mobile

Owners of gas heating boilers are increasingly switching to remote control of their operation. This possibility appears when the equipment is equipped with external sensors and a special controller with a GSM module is used. A mobile phone is sufficient to control the entire system.

GSM heating control provides the following features:

• equipment operation can be adjusted at any distance;
• the user promptly receives current information;
• decisions are made very quickly and in accordance with the situation, after which they are embodied in control actions.

Advantages of heating control via GSM channel

The transition to remote control of boiler equipment is associated with certain costs for the purchase of the module, its connection and configuration. This gives the user the following benefits:

• the system works offline and is under constant control;
• information about the situation and current parameters of the equipment is transmitted in real time;
• heating works stably and year-round;
• the room maintains a constant thermal regime;
• provides the most economical fuel consumption;
• unauthorized persons cannot interfere with the operation of the boiler.

The use of GSM heating control is also an opportunity to constantly analyze the operation of the system. The accumulated array of information allows you to make predictions about how the equipment will function in the future.

The principle of operation of the GSM heating control

As mentioned above, remote control of the heating boiler and monitoring of its status are carried out using a GSM module. This system promptly notifies the user using mobile telephone channels. This includes information about the following events:

• current values ​​of operating parameters;
• violation of the specified mode of operation;
• equipment failures.

The GSM heating control module has two-way communication with the user, that is, it receives and executes his commands. Among other things, it allows:

• control heating and other equipment at any distance. To do this, telephone commands are transmitted in the form of SMS messages;
• remotely turn on and off the boiler;
• change the temperature of the coolant and other parameters of the heating system;
• receive information about the operation of the equipment and the air temperature in the room.

The unit can be connected optional equipment, also available for phone control.

the main task GSM control heating is to control the operation of boiler equipment in accordance with the specified parameters. In case of any problems, an SMS message is sent to the user's mobile phone. Signals are sent in the following cases:

• the temperature of the heat carrier or air in the room has risen above the set values;
• there was an emergency stop of the equipment;
• the sensor of flooding or smoke of the room (if any) has worked;
• a sensor has tripped, indicating a pressure surge in the system or a gas leak. Any of these events is accompanied by an automatic shutdown of the boiler.

When registering a GSM heating control, several mobile phones can be entered into its memory. In an emergency, an alarm signal is transmitted immediately to all numbers.

Operating conditions of the GSM heating control system

The main limitation that can prevent the use of the boiler remote control module is the lack of cellular communication. Both the module itself and the person managing it must be in the network coverage area. In places of suburban construction, problems with this, as a rule, do not arise. To solve this problem, you can install a cellular signal booster.

Another point is a power outage, which is not uncommon for the private sector. In this case, backup batteries are provided to maintain the operability of the GSM heating control.

Heating control from smartphone GSM / GPRS

Often, owners of country houses would like to control heating costs by remotely controlling the temperature in their home, and also be aware of the operation of heating equipment, would like to be notified in a timely manner of all emergencies and changes in operating modes. To maintain a comfortable temperature in the room, it is enough just to adjust the parameters of the heating boiler, but the problem is that you are not at home and you simply cannot approach the boiler and turn the switch. For example: when you are going to come to the dacha - it is enough to "flood" a little, and in your absence to reduce the heating power - why throw money away by heating an empty house? With the help of a room thermostat, this is elementary - just set the device to certain temperature parameters that will be observed in automatic mode. GSM heating control is popular with homeowners who do not have wired internet (or its quality is poor) and, accordingly, do not have the opportunity to use home Wi-Fi networks. Almost the only solution in this case is to use remote gsm heating control.

What to do, how to remotely control heating?

If the house or cottage is connected to the Internet, and there is a Wi-Fi router (router), then there are no special problems - you can buy, for example,
internet thermostat Salus IT500 or install a more powerful system Salus IT600 and solve the problem.
What if there is no internet? And if there is Internet, but the quality of the connection is useless, which is often found far from the city summer cottages? How to control the heating in this case?
Yes, it's very simple - with the help of special modules GSM-Climate ZONT H-1 , ZONT H-1V or even more functional GSM thermostat models ZONT H-1B or controller Zont H-1000 from the Russian company Micro Line.
Since 2002, the company has been specializing in the development and production of modern electronic systems, in particular, thermostats and controllers for heating boilers under the ZONT-H brand. Mass-produced products are distinguished by their affordable price, functionality and modern design, and reliability and quality are confirmed by certificates of the State Standard of Russia. The company closely cooperates with Russian manufacturers of heating boilers, in particular, it has mastered the serial production of electronic modules GSM Climate (model H1 with a GSM control channel) and Wi-Fi Climate (model H2 with a control channel via Wi-Fi) for the manufacturer of water heating boilers JSC EVAN ".

The ZONT thermostat is essentially a simple room thermostat, made on a hardware platform using GSM / GPRS modem and WEB technology. The principle of its operation and the method of connecting to the boiler are exactly the same as those of conventional thermostats. It is connected to a special connector and controls the boiler, maintaining the set temperature according to the readings of its temperature sensor. It simply turns the boiler on or off by closing the contacts of its output relay. Thus, if your boiler provides for the possibility of controlling commands from a room thermostat, then the ZONT thermostat can be used with it.

ZONT H-1 and H-1V are compact multifunctional devices with their own SIM card of any operator (which, by the way, must provide reliable signal reception in a given area), allowing you to control the indoor climate from any phone (satellite, mobile or fixed line). ), tablet or PC.
The module will independently call only the owner's phone or trusted numbers defined by him, warning him of all changes or emergencies. Accordingly, Zont GSM-Climate can only receive commands from the owner or from "their" phones. Unauthorized access is absolutely excluded - even if someone dialed the number by mistake, the device will ask for a password that only the owner, other family members or trusted persons know. In addition to SMS-management, the possibility of control through the voice menu is also implemented.
Actually thermostat ZONT H-1 acts as your personal assistant- I called him, gave the command, for example, to heat up hotter in advance, and the whole family, as a result, will arrive in a warm and cozy house. Or vice versa: you forgot to turn down the power in the morning, leaving for work, it’s not a question, you can do it right from work, via the Internet.
With it, you can control various parameters of the heating system: change the power and mode of operation of the boiler, achieving its greatest efficiency, set the temperature of the coolant, getting a comfortable temperature in the room. Moreover, the device is able to independently monitor the readings of temperature sensors and adjust the operation of the boiler depending on pre-set parameters. At the same time, it is possible to switch to the “Economy” or “Comfort” fixed temperature mode, to the “Schedule” weekly programming mode or turn off the boiler. The device independently monitors the readings of the temperature sensor and corrects the operation of the boiler depending on the specified parameters.
Moreover, the module also monitors the health of not only the boiler, but the entire heating system! Although, of course, the device is still not a person and cannot cope with an emergency situation on its own. But to notify the owner in a timely manner of an accident, to transmit a report on changes in the parameters of the boiler, or to send a service message - this is quite within his power. Not convinced? And here is the bonus - the user can also connect additional sensors to it, for example: movements, openings, water leaks, gas leaks, firemen, etc. Information is transmitted via mobile communication channels and the Internet.
By the way, in order for the ZONT H-1 and ZONT H-1V thermostats to work, it is necessary to maintain a positive balance, there are no differences compared to a regular smartphone!

What is the difference between ZONT H-1V and ZONT H-1?

The Micro Line company releases the ZONT H-1V thermostat model, which is almost identical in functionality to the GSM Climate thermostat, which differs appearance and some technical features:
- The relay in H-1V holds 220V, and in H-1 it is designed for 120V;
- ZONT H-1V has a 220V->5V adapter for converting a high-voltage boiler alarm signal (available in Vaillant) into a low-voltage signal for the ZONT input;
- Battery backup power in the H-1V module it is built-in, and in the H-1 it is not included in the basic configuration and can be purchased separately;
- The firmware of these modules is exactly the same, and the circuits are almost the same. They differ only in different bodies.

Features of operation and design of thermostats ZONT-H1

Now the main trend in this area is cloud services and thermostats work using the Internet. Unlike competitors, ZONT thermostats cannot be directly controlled from the front panel (there are simply no buttons or switches) and all monitoring and control operations are performed using either a personal computer or mobile devices - a smartphone or tablet. This allows the owner to control the situation, wherever he is, while significantly reducing the cost of equipment.

And if you already have a room thermostat and want to use the ZONT - H features additionally? Is it possible?
Yes, it's possible. To do this, you need to connect a room thermostat to one of the ZONTa inputs. This connection allows you to control the boiler both remotely (through the ZONT itself) and manually, by commands from this room thermostat. The choice of control method is carried out via the Internet service or SMS by the “Manual mode” command. When operating from a room thermostat, remote temperature monitoring and all notification modes (on an accident, power loss / restoration, alarm events, etc.) are preserved.

Backup battery and UPS.
It is intended only to inform the server and the owner via SMS about the loss of the main 220V power supply. Normally the boiler cannot operate without the main power, so there is no point in controlling the boiler in this situation.

Thermostats ZONT-H work even when cellular communication is lost, performing, for example, a pre-set weekly schedule.
It is possible to use control commands in the form of SMS text and even using the voice menu.
Simple, functional and user-friendly graphical interface through a web browser or mobile application. All data is stored on the server and at any time you can view convenient and visual system operation graphs, informational messages or make the necessary settings.

How does the ZONT-H1 thermostat control the boiler?

Most boilers have terminals closed with a jumper (corresponds to the switched on boiler) for connecting a room thermostat. It is to these terminals that the ZONT-H modules are connected: this jumper is removed and the contacts of the ZONT H relay are connected in its place.
The thermostat measures the temperature in the room and switches the output relay on or off, controlling the operation of the boiler in heating mode so that the temperature inside the room corresponds to the set value. It controls the temperature in the house and outside, the supply voltage, the technical condition of the boiler and signals in case of an accident or power failure. If the values ​​deviate from the set values, it informs the owner in any pre-selected way: by phone call, SMS message or notification via the Internet.

The OpenTherm interface, why is it needed and what does its use give?

If you are a happy owner of a gas heating boiler with an OpenTherm interface, then the use of this device will allow you to additionally save up to 30% of gas costs! For what?
How can I determine if my boiler will work with the OpenTherm interface?
In most cases, the instruction manual for the heating boiler directly states that the boiler can operate via the OpenTherm interface and has a corresponding logo on it. In the case when it is not directly indicated, then an indirect sign of work on this interface is the display of additional boiler parameters through a remote thermostat, such as: pressure, coolant temperature, modulation percentage, etc. Usually, boilers with OpenTherm have a modulating burner, so they can smoothly regulate the temperature of the coolant using their own computer. However, it must be understood that the capabilities of the boiler for smooth regulation are limited. Sometimes the minimum modulation level is quite large, for example, there may be a modulation range of 30%-100%. Then the boiler computer, which was set to a low temperature of the HP, will be forced to periodically turn the boiler on and off, that is, work in relay mode, like a boiler without modulation.

The thermostat, when connected via the OpenTherm Interface, controls the boiler power by periodically changing the burner power and provides control of its operation parameters and technical condition. In the event of a malfunction (accident) of the boiler, the error code and its interpretation are transmitted by the thermostat for display in the web service. The ZONT GSM thermostat together with the OpenTherm interface saves up to 30% of heating costs during the heating season due to:

• saving energy when the boiler is running on schedule
• energy savings through efficient burner modulation control
• increasing the life of the boiler
• effective remote control of the boiler
• effective remote boiler maintenance

Now we will show how the boiler works with a conventional thermostat and how it works with a thermostat with an OpenTherm interface

Operation of the boiler with a conventional thermostat.
A conventional thermostat controls the boiler in relay mode and, when the temperature deviates from the set values, closes or opens the contacts of the output relay, turning the burner on and off. When turned on, the boiler immediately starts working at full power and it turns out that a portion of heat enters the heating system more than is required to return the air temperature to the set value.
When the set temperature is reached, the thermostat turns off the boiler, but due to the large inertia of the heating system, the "excessive" heat will still be given off from the pipes and radiators of the heating system for some time. The air temperature will thus increase more than necessary and overheating of the room will occur. In addition, due to the inertia of the water heating system, the energy of the boiler will be wasted when the thermostat turns on the boiler again: the boiler burner will turn on immediately, but its heat will go to the room certain time, and the actual room air temperature will first "sag" relative to the desired setpoint, and then increase again. Periodic frequent turning on / off of the boiler is a non-optimal operating mode for the boiler and the heating system:

• reduced boiler life
• condensation forms in the chimneys
• before the burner warms up, the chemical combustion of the gas-air mixture is not optimal
• the efficiency of the heating installation decreases due to the downtime of the heated boiler

Boiler operation with thermostat with OpenTherm interface
The thermostat does not turn the burner on and off, but constantly and smoothly changes (modulates) its burning power, "adapting" it to the current heat demand. It constantly calculates how much the actual temperature deviated from the set one, and the greater this difference, the more burner power it requires to increase the boiler. When the hysteresis is exceeded, the thermostat completely turns off or turns on the burner, but in the interval between these extreme values, it smoothly controls its combustion. Those. the process of alternating periods of underheating and overheating will be "fading", all the time automatically tending to an equilibrium state, when the boiler at any time gives exactly as much heat to the heating system as is required to compensate for the current heat losses of the room. This ensures that the temperature in the room remains at a constant set level. In the event of a sharp change (frost, open window, door, etc.), the process of fluctuation of the actual temperature around the set value will again be taken out of equilibrium for a short time, but quickly, and most importantly automatically, it will return to normal state. For the boiler and for the efficiency of the heating installation as a whole, this is much better than a simple periodic switching on and off of the boiler: it is much more economically profitable to work continuously at a reduced power.

Functionality of GSM thermostats ZONT H-1

Convenient and simple WEB-interface with the following features:

• displaying the current state of the boiler and the temperature in the room
• boiler control
• temperature monitoring (inside, outside, coolant) for any selected period of time
• programming the boiler according to the schedule
• notifications about the operation of additional sensors

Remote control of the boiler operation can be carried out:
- SMS commands;
- when dialing to the SIM-card number using the voice menu;
- via the Internet (WEB-interface and mobile applications for Android and for iOS devices).
Various event notifications:
- when the measured temperature deviates from the specified threshold values
- about the boiler failure (provided that the thermostat is connected to the emergency output of the boiler)
- a malfunction of the temperature sensor
- about the loss or restoration of power supply
- about the status of additional sensors connected to the "Alarm" input"

The specialists of the company "Termogorod" Moscow will help you choose the right one, buy as well as mount remote control by GSM, find an affordable solution. Ask any questions you are interested in, telephone consultation is absolutely free, or use the form "Feedback"
You will be satisfied cooperating with us!