Double-circuit gas boiler Viessmann Vitopend 100-W
The double-circuit gas boiler Vitopend 100-W of the German company Viessmann is an excellent solution for organizing heating and supplying hot water to both small premises (small apartments, small offices) and individual houses up to 300 square meters. Due to the fact that the boiler is mounted on the wall, the usable area is saved (especially in small apartments), and the simple and attractive appearance will allow it to fit into any interior.
The advantages of this boiler include compact dimensions - I am still surprised by the fact that a unit with such small dimensions is able to heat the room with high quality and uninterruptedly provide hot water. Another plus is the control system - simple and intuitive, requiring no special skills from the user. In addition, the boiler is equipped with a self-diagnosis system, which greatly simplifies its operation and control over its correct operation.
Viessmann specially coordinates the technical characteristics of its gas boilers, which are intended for operation in Russia, with the peculiarities of the local gas supply.
Naturally, there are also disadvantages - high sensitivity to voltage drops in the mains and some operating features, which we will discuss below.
General view and technical characteristics
Double-circuit gas boilers Viessmann Vitopend 100-W are of two types: chimney and turbocharged. The first ones will be connected to a stationary chimney, made for the installation of boilers of this type (it provides natural draft and removal of combustion products). Turbocharged boilers are installed in rooms where there are no special exhaust systems for exhaust gases: combustion products are removed using a special fan outside the room, which makes it possible to install such a boiler in almost any apartment. We will consider the chimney model.
In addition to the boiler, the delivery set includes a mounting frame and a pipeline for exhaust gases. The installation of the boiler and the installation of the chimney system are carried out by qualified craftsmen, so in this matter you will have to rely only on their level of professionalism.
The first start-up of the boiler and its adjustment is carried out by a representative of the Viessmann service center in your region, the boiler is also put under warranty.
Technical characteristics of the boiler Viessmann Vitopend 100-W:
- minimum and rated power - 10.7-23 kW;
- the power of the hot water supply system is 23 kW (this boiler has the priority of hot water supply, therefore, when this circuit is turned on, all the resources of the boiler are directed to water heating);
- maximum water pressure in the system - 3 bar;
- expansion tank - volume 6 l;
- maximum allowable temperature - 85 °C;
- water temperature range in the heating circuit - 40-80 °C;
- temperature range in the hot water circuit - 30-57 ° C;
- minimum and maximum performance in the hot water circuit at an average water temperature of 30 ° C - 2.4-11 liters per minute;
- smoke formation temperature - up to 117 °С;
- electrical protection class - IPX4D;
- overall dimensions (width, height, depth) - 40x72.5x34 cm;
- weight - 36 kg.
Control Panel
From left to right: pressure gauge, display, hot water temperature controller, heating water temperature controller, switch
The manometer shows the water pressure in the heating circuit. After the heating system is installed (radiators, heated towel rails, underfloor heating are installed), the circuit must be filled with water. For these purposes, a special key is used that opens the water intake to the boiler heating system.
When filling the system with water, you must look at the pressure gauge so that the water pressure does not exceed 1.5 bar: this is what the manufacturer recommends. But I, for example, brought the pressure in the system to 2 bar, and after a while (the boiler did not turn on for two weeks - I connected the gas, agreed on service) it dropped to the recommended 1.5 bar - air left the system through special valves on batteries and in the boiler itself. When the heating circuit is running, the water will heat up and the pressure will rise to the normal operating rate of 1.8-2.5 bar.
The display shows the temperature of the water in the heating system, the temperature of the hot water, the intensity of the burner, and can also show fault or error codes that are deciphered in the user manual.
The illustration above shows that hot water heating is disabled; at the left, at the bottom of the display, the "light" shows that the water is being heated in the heating system (the battery icon is lit in the "house") and its current temperature.
With the help of temperature regulators, you set the required level as you wish - everything is very individual here. You just have to try several options and settle on the one that suits you. In any case, the regulator must be between the marks "2" and "5" - in the lower position there will not be sufficient heating, and in a position greater than "5" there is a risk of overheating. It should be noted that in order to warm up the room for the desired temperature, it is necessary to set the temperature of the water in the system above 60 ° C (the position of the regulator is above the "3" mark).
Since the boiler has priority for hot water preparation, it is equipped with a special relay that is triggered when a hot water tap is opened: the burner turns on, and a special three-way valve switches to hot water preparation mode.
Attention! If you do not use hot water regularly (you do not live in an apartment, you are absent for a long time), from time to time you should turn on the hot water circuit and release a few liters - to prevent the three-way valve from working normally (so that it does not "sour").
Optional equipment
The Viessmann Vitopend 100-W boiler can be equipped with additional devices that will greatly simplify its operation.
Vitotrol 100 RT is a room thermostat on which you set the desired temperature in the room, and it takes over all control of the boiler.
Vitotrol 100 UTA - a more complex model of the thermostat, allows you to program the temperature regimes throughout the day. For example, you can program it so that at night the temperature will be maintained at, say, 17 ° C, and by the time you wake up at 7 in the morning it will already be 21 ° C. In the same way, during the working day, when there is no one in the apartment, the air temperature can be lowered, and by the time you arrive from work, the thermostat will raise it to the most comfortable level.
Vitotrol 100 RT (left) and Vitotrol 100 UTA (right)
Vitotrol 100 UTDB is an even more sophisticated device, equipped with a liquid crystal display to indicate operating modes.
Vitotrol 100 UTDB-RF - this gadget has a device for receiving and transmitting radio signals, with its help the temperature in the room can be set remotely.
Vitotrol 100 UTDB (left) and Vitotrol 100 UTDB-RF (right)
Operating tips
Be sure to check that the gas hose is connected to the boiler without distortions and mechanical stresses. It goes without saying that there should be no gas leaks.
When the master from the service center was preparing for the first start-up of the boiler, he checked for gas leaks with a special highly sensitive device. And it turned out that almost all junctions are leaking - a little, insignificantly, but they are skipping (no leaks are visible when checking with a soapy solution). I had to call the gas workers, who again "repacked" all the connections.
In order to respond in a timely manner to possible gas leaks, I recommend purchasing a household gas analyzer (without it, they may not even give gas to your apartment). Asking price $20. The device is installed at a height of 20-30 centimeters above the boiler and, in the event of a gas leak, it will give a rather unpleasant sound signal, which will be very difficult not to hear (you can check it with gas from a simple lighter).
In order to extend the life of the boiler and its combustion chamber, it is necessary to install a gas filter - there may be small abrasive particles (sand and other debris) in the gas pipeline that can clog the combustion chamber, which will necessarily affect its normal operation. Such a filter costs up to $10, and you can clean it yourself - remove the front cover and clean the foam filter, which is located between two metal meshes. After cleaning, make sure that the lid is screwed on tightly and there is no gas leakage.
The electronics in the Viessmann Vitopend 100-W boiler are very sensitive to voltage drops, so I strongly recommend purchasing a voltage stabilizer. Firstly, it will ensure the normal and uninterrupted operation of the equipment, and secondly, it will save your nerves and money - warranty obligations do not apply to the failure of the boiler due to a power outage (you can only sue the energy supply company, and how it will end in our realities, you know yourself).
I purchased such a voltage regulator for $40, which, you see, is not much compared to the cost of a boiler or how much it can cost to replace electronics. The stabilizer at the output "hardware" gives 220 V and works normally when the input is from 140 to 250 V. It is designed for a power of 500 W, which is quite enough for one boiler.
If you have a coarse water filter installed and water enters the boiler through it, then it is better to choose a mesh as a filter element (mesh size from 5 to 50 microns). The use of a filament filter or any other, the smallest parts of which can eventually get into the heater and impair its performance, should be avoided.
After the first start-up (we let the boiler run for a day and turn it off), I also recommend cleaning the "return" filter. To do this, close two taps (upper and lower), unscrew the cover and clean the filter mesh from possible debris that got into the heating system during its installation.
An important point - when turning off the boiler, first turn the temperature regulators to the extreme left position, let the boiler work for several minutes (so that the temperature in the heater drops) and only then turn it off from the network.
If you are going to close the boiler in a cabinet, build it into furniture, then you should take into account that its body is removed "up". Therefore, it is necessary to leave a distance of about 20 centimeters between the upper part of the boiler and the furniture, so that service can be carried out.
For normal operation of the boiler, air flow is necessary, therefore it is strictly forbidden to close the special openings intended for this.
In the room where the boiler is installed, there should not be high humidity for a long time - you should not dry clothes in the same room with this device.
It is very important to properly ventilate the premises when the boiler is running. To do this, before opening the window, completely close the thermostatic valves on the battery. This will save gas and electricity.
When airing - set the regulator to "snowflake"
Another serious point - radiators and thermostatic valves for normal operation should not be closed or cluttered (with heavy curtains or foreign objects).
Also, to save money, you should maintain the temperature in the room at the same level (20 ° C is considered optimal) - the boiler will work stably, evenly consuming gas and electricity.
If you have blinds or shutters, you can close your windows at night to reduce heat loss.
The German company "Vissmann" has been one of the world leaders in the heating equipment market for several decades. The company gained its fame, first of all, thanks to its solid fuel and gas floor boilers. And in this segment, perhaps, they have no equal at all.
In recent years, the German concern has been increasingly relying on compact and economical wall Viessmann gas boilers. Reviews for this type of equipment are not as common as, for example, for popular boilers of brands or.
This is understandable, because the equipment from the German manufacturer has never been budgetary, and the price of wall-mounted single-circuit and double-circuit gas boilers Wiesman did not allow buying and making them affordable for the average buyer.
Today we’ll talk in more detail and review the wall-mounted gas appliances of the widespread Viessmann Vitopend 100-W WH1d series. Thanks to the instruction manual, together we will determine their significant advantages and disadvantages compared to competitors, consider the main types and technical characteristics of German boilers of this brand.
The main types and models of wall-mounted gas boilers Wisman
To date, the German concern produces two main types of wall-mounted devices:
1. Traditional model boilers Viessmann Vitopend 100-W;
2. Condensing boilers Viessmann Vitodens 100(-200)-W.
Gas boiler Viessmann Vitopend 100-W
In Western Europe, the German company supplies condensing gas boilers of the model Viessmann Vitodens. In Russia, this type of equipment is not so popular due to its high price of 100 thousand rubles and more. These devices have a very good efficiency index (more than 100%), and the manufacturing country is Germany.
For Russia and the CIS countries, this company has developed a more budgetary series of wall-mounted gas boilers Viessmann Vitopend 100-W. These models are characterized by a standard (for wall-mounted appliances) efficiency of about 90%, and the price of a boiler, which is already more realistic for the consumer, is from 700 euros, which is already noticeably lower than, for example, for the same "".
Boilers of the Viessmann Vitopend 100-W series are assembled in Turkey and in some countries of Eastern Europe, they are available in several versions:
- double-circuit with a thermal power of 22, 24 and 30 kW;
- single-circuit with a power of 24 and 30 kW.
Depending on the type of emission of combustion products, gas boilers are divided into devices:
- with a closed combustion chamber or "turbo boilers", with separate (80/80 mm) and, i.e. according to the "pipe in pipe" type (60/100 mm);
- with an open chamber or "atmospheric" boilers, with a chimney pipe diameter of 130-140 mm.
The device and features of gas boilers Viessmann Vitopend 100-W
In Russia, turbocharged double-circuit gas boilers have gained the greatest popularity, let's look at them in more detail in the photo below.
1. Turbine
2. Primary copper heat exchanger
3. Combustion chamber
4. Gas burner with flame modulation
5. Hydro unit "AquaBloc" with quick couplings "Multi-Stecksystem"
6. Boiler control unit
7. Expansion tank
The boilers of this model have two heat exchangers: a copper primary one, and a compact secondary one made of stainless steel for heating running water.
The three-speed circulation pump "Wilo" with an automatic air vent has been replaced with a better analogue - a pump from a German manufacturer " Grundfos"capable of lifting a column of water up to 6 meters. The membrane expansion tank for models with a rated power up to 24 kW has a volume of 6 liters, and 30 kW - 10 liters.
Thanks to a special hydraulic module AquaBloc with quick connectors Multi-stack system, it has become very convenient to diagnose and repair the main elements of a gas boiler. This is especially true if you need to quickly replace any spare parts when the outside temperature is below zero.
The entire hydraulic part of the boiler of this brand is made of high-quality composite materials. Both heat exchangers, gas and three-way valve, flow and temperature, flame and draft sensors are of European production.
Vitopend boilers automatically maintain the temperature of hot water and heat carrier, thanks to an automatic modulating burner. The device also has a system for self-diagnosis and protection of the boiler against freezing and overheating, as well as a security group.
Operation control and functions of the Wisman gas boiler
On the front side of the body of the device there is a control unit, with the help of which the temperature is adjusted and the operating modes of the boiler of the Vitopend model are set. In addition, the digital LCD displays error codes when a malfunction occurs during the operation of this gas heating equipment, as well as controlling the operation of the indirect heating boiler, if necessary.
Wiesmann boiler control unit
1 - pressure gauge
2 - LCD display
3 - temperature controller for running water in the DHW circuit
4 - temperature controller of the coolant in the heating circuit
5 - button on / off the boiler
Single-circuit and double-circuit gas boilers Viessmann Vitopend 100-W have built-in weather-dependent automation. If you additionally buy a street temperature sensor, the boiler will work, taking into account the weather and the air temperature outside the window, on the street.
In addition, to maintain the required air temperature in the house, it is possible to install a room thermostat for the Wisman boiler. The company produces several types of these control devices under the name "Vitotrol":
– mechanical thermostat type “RT”
- programmable type "UTA"
- with digital display "UTDB"
- with built-in receiver and remote radio transmitter "UTDB-RF"
Set for connecting a warm floor to a Viessmann gas boiler
To connect the underfloor heating system, the company has developed a special kit.
It consists of the following elements:
- pump for circulation;
- thermostatic mixing valve;
- thermal heads with a remote sensor;
- supply copper fittings.
This set automatically maintains the temperature required for underfloor heating and prevents the formation of condensate in the boiler.
Having bought such an installation kit for the Wiesmann boiler, you can no longer purchase an expensive collector group with a pump and mixing unit for underfloor heating.
Technical characteristics of double-circuit gas boilers Viessmann Vitopend 100-W
Double-circuit (combined) boilers of the Wisman brand have a hot water capacity of 10 to 14 l / min., Depending on the power of a particular model. Electricity consumption is small: up to 120 W from a 220 V power supply. To avoid damage to the boiler's electronic board, experts strongly recommend buying.
Able to work on natural and liquefied gas (when replacing gas burner nozzles) at a low consumption. More detailed technical parameters are given in the table.
Wismann gas boiler: technical specifications
Advantages of wall-mounted gas boilers Viessmann Vitopend 100-W
- quality of materials;
- noiselessness;
— compact dimensions;
— modern German technologies;
is a prestigious brand.
Disadvantages of Wisman gas boilers
- high price of boilers;
- high prices for spare parts and components;
— hydraulic tubes made of composite material;
- a narrow range.
Today together we dismantled the double-circuit wall Wismann gas boilers and made a review about this device. In accordance with the operating instructions, we examined the technical characteristics and design of the boilers of the Viessmann Vitopend 100-W WH1d series.
Despite some shortcomings and high prices for gas boilers, this is a very high-quality and reliable heating device from a German manufacturer. It may be worth spending money on a brand once and buying good, prestigious heating equipment in order to avoid problems with your boiler in the future. Let's watch the video.
Boilers Viessmann have good performance properties. The article describes the correct installation and installation of boilers, which will allow them to realize their full potential and avoid trouble caused by installation errors.
Depending on the type, Viessmann boilers are installed in different ways. This is due to the design features of the heating water heater, its dimensions, weight, method of connection to the chimney, type of fuel.
Installation steps for Viessmann boilers:
Installation of various types of boilers.
- Solid fuel and gas floor.
These types of aggregates are characterized by increased mass, somewhat larger width, length and height. The devices need the strongest and most reliable foundation, because their weight is the largest in the entire product line of the company. The base is made of rubble stone, brick battle, crushed stone, concrete. The area of the foundation is three to four times the area of the boiler. The use of a weak base leads to damage to the chimney, violation of the integrity of threaded connections, leakage of coolant and domestic gas, fires, explosions. No less dangerous is carbon monoxide poisoning. The solid fuel type of heating devices is very demanding on the quality and size of the chimney. During the combustion of firewood, the release of volatile substances is greater than during the combustion of gas, and the content of soot in the outgoing smoke is ten times higher. Therefore, the diameter of the chimney channels must be increased. The minimum size of the channels is indicated in the operating instructions, but in real life it must be made at least one and a half times larger in order to avoid soot overgrowing as a result of using oily or damp firewood. Violated calculation, installation, installation and connection of Viessmann Wiessmann boilers increase the risk of fire and carbon monoxide poisoning tenfold.
- Gas wall.
It does not need a base, because it is fixed to the wall with anchor bolts. Of all the fuel boilers, it has the smallest mass and maximum efficiency.
Connecting the power system.
- A solid fuel heating water heater does not need a special power supply system.
The only requirement is a stoking sheet that protects the floor from the possible escape of coal and protects against fire.
- The gas boiler requires connection to a low-pressure mains gas line. Prohibited by law
make this connection yourself. This is fraught with gas leakage, explosion, fire, and is dangerous not only for people living in the house, but also for their neighbors. Connection to the gas pipeline must be carried out by specialists with the appropriate education and documents of the established form. After connecting the power, the master will without fail search and eliminate leaks of domestic gas.
Connecting the heating system.
The installation of the Wiesmann boiler to the heating pipes is identical for any type and model. The pipes are connected using threaded connections, sealed with fluoroplastic flight (FUM). A properly assembled joint will serve without leaking for decades. The connection of the water outlets of the unit to metal-plastic pipes is carried out using adapters and fittings, and does not require special equipment. If the heating is made of plastic pipes, you will need a special soldering iron. Metal heating pipes require a welding machine, an angle grinder (grinder) and a highly skilled craftsman.
Chimney connection.
Solid fuel and gas boilers with an open chamber are connected to the chimney that exits above the roof ridge with the help of roofing iron pipes. The use of galvanized steel pipes is unacceptable; when heated, zinc begins to be released into the air, leading to accumulation in the body and severe poisoning.
Installation and installation of Viessmann boilers must be carried out by specialists. This is a guarantee of safe and comfortable heating in the winter. Masters will determine the best place for the unit, the optimal location and shape of the chimney, calculate the required size and shape of the foundation, calculate the ventilation and fire safety of the room. Do not risk the lives of loved ones for the sake of illusory savings.
The popularity of gas heating is growing every year more and more. One of the reasons for this growth is the cost of fuel, which serves as its basis. In addition, there are other advantages - it is simplicity and ease of use, there are no additional costs for the maintenance and use of such equipment, greater efficiency in work, productive heating. Read what are and what are their advantages.
Viessmann boiler connection
Installation and connection of a gas boiler is carried out in several stages. But before starting installation work, it is necessary to complete all work related to the electrical connection.
Nevertheless, the first launch should be carried out together with specialists who will once again check the entire system and give an opinion. Without the help of gas workers, it will be impossible to obtain permission from special authorities to use such equipment.
Even in case of the slightest deviations from the norms, it is impossible to turn on the boiler!
Experts, having examined the equipment, will give advice and help to correctly adjust everything. This device is dangerous in itself and misuse can result in death.
Maintenance of Viessmann boilers
In order to avoid a major overhaul of the boiler and its complete replacement, it is necessary to follow the rules for operating gas equipment. Even with the slightest and minor violations, you cannot try to fix anything on your own. Such actions can lead to additional violations and breakdowns and will only further worsen the technical condition of the gas boiler. In any case, it is necessary to contact the gas specialists.
The best option is to conclude a contract for regular maintenance of the boiler.
Repair of Viessmann boilers
No matter how reliable Viessmann equipment is, sooner or later breakdowns still occur, parts fail, spare parts wear out. Repair is inevitable. In order to be able to make repairs in a timely manner and as soon as possible, it is necessary to take into account the possibility of free access at the planning stage.
There must be free space around the device to be able to observe the operation of the unit visually. And in the event of a breakdown, quickly and without financial losses to carry out repairs. Also, this approach will avoid the dismantling of the boiler and the inevitable costs in this case.
Spare parts for Viessmann boilers
The quality of German household and climatic equipment is highly valued all over the world. And this is not surprising - the Germans are meticulous about every little thing, honing the equipment they produce to the ideal. And if a Viessmann Vitopend 100 gas boiler has settled in your house, you are very lucky - it will last longer than any other climate control equipment. In this review, we will consider all the boilers from this line, talk about technical characteristics, and give user reviews as an example.
Description of the model range
Viessmann Vitopend 100 is a whole line of gas boilers, which includes a wide variety of models. They are divided into single-circuit and double-circuit, with an open and closed combustion chamber. In other words, in stores we will find models for different operating conditions and user needs. There is also a power division - on sale there are samples with power from 10.5 to 34 kW.
Features of boilers Viessmann Vitopend 100:
- Reliable heat exchangers - they are made of high quality copper (primary) and stainless steel (secondary). In some models, bithermic heat exchangers are installed;
- Reliable circulation pumps - initially Wilo pumps were installed here, later Grundfos pumps were installed in the boilers;
- Quick assembly and disassembly of equipment to speed up repairs and maintenance;
- Many security systems - they control the presence of traction, flame, the flow of water and coolant;
- Simple operation without unnecessary functions for the end user;
- Built-in diagnostic system;
- Premium build quality.
An instruction manual is supplied with each Viessmann Vitopend 100 gas boiler. If it is lost, download it. But even an unprepared user can deal with the controls.
For the end user, two handles and one button are provided on board the gas boilers - more is not needed. The first knob is responsible for the temperature in the hot water circuit, the second regulates the temperature in the heating circuit. Temperature indicators and pressure in the system are monitored using a pressure gauge and a liquid crystal display - it also displays error data. The button turns on / off the circuits, a reset is performed when the electronics hang.
Also in the description is a brief instruction for the installation of the Viessmann Vitopend 100 gas boiler and auxiliary equipment - these are boilers and underfloor heating systems. Here, users will be able to get acquainted with the internal structure of the equipment. For specialists, a guide is provided for the design of heating systems and hot water supply.
Despite the availability of detailed instructions, installation, configuration and the first start-up of the equipment should be carried out by specialists. They also connect Viessmann Vitopend 100 boilers to gas pipelines.
Some popular models
Let's explore some popular models and their specifications. We will also acquaint you with approximate prices for Viessmann Vitopend 100 boilers.
Before us is a gas boiler Wisman Vitopend 100 with a capacity of 31.2 kW. It is made according to a double-circuit scheme and is equipped with a closed combustion chamber - smoke removal is carried out by means of a coaxial chimney. The unit is equipped with a circulation pump, a bithermic heat exchanger, an expansion tank of 10 liters, a safety valve, a soft ignition system and electronic flame modulation. In other words, the boiler is completed according to the full program, as it should be.
The power of the gas boiler from the Viessmann Vitopend 100 line is adjustable from 13.2 to 31.2 kW, the efficiency index is 93%. The equipment can warm up the coolant to a temperature of +76 degrees. Also, consumers will be pleased with the excellent performance of the DHW circuit - it can deliver up to 14.3 l / min at an outlet temperature of +30 to +57 degrees. The estimated cost of a gas boiler from Viessmann is 47.5 thousand rubles.
This model is single-circuit, turbocharged, its power is 24 kW. To provide housing with hot water, you can use an indirect heating boiler connected to the heating system or a separate storage / instantaneous water heater. The boiler is equipped with everything necessary for inclusion in the heating system - from a safety group to an expansion tank of 6 liters. It can warm up the temperature in the circuit to +76 degrees.
This gas boiler, like any other Viessmann Vitopend 100 boilers, can be converted to work with liquefied gas - the consumption will be 2.09 kg / h, while the consumption of natural gas is 2.83 l / h. If necessary, underfloor heating systems and room thermostats of compatible models (preferably those manufactured by Viessmann) are connected to the unit. The estimated cost of the device in Russian stores is 33 thousand rubles.
The presented gas boiler is a turbocharged, double-circuit. Its power is 30 kW with an efficiency of up to 90%. The device was equipped with an advanced electronic control module with a built-in self-diagnosis system, a 10-liter expansion tank, and a Grundfos circulation pump. The temperature of the heating circuit can reach +76 degrees, the temperature of the water in the hot water circuit - from +30 to +57 degrees with a capacity of up to 14.3 l / min. The approximate cost of a Viessmann Vitopend 100 WH1B 269 gas boiler is 36 thousand rubles.
This model differs from others in separate heat exchangers. The primary is made of copper, the secondary is made of stainless steel. The power of the gas boiler is 31 kW, the power of the connected load is up to 33 kW. The unit is made according to the scheme with one circuit, it does not give hot water. The coolant warms up to a mark of +76 degrees. A room thermostat must be used to control the air temperature. The model has an increased efficiency - up to 93%, can run on liquefied or natural gas. Estimated price - about 37 thousand rubles.
