Gas water heater for rooms without chimney

What are the advantages of a gas water heater with a closed firebox?

Heating technology is constantly improving. Due to this, new modifications of instantaneous water heaters have been on sale for decades. Currently, a gas water heater with a closed combustion chamber is in great demand among consumers. It has the best safety and environmental performance in comparison with its counterpart equipped with an open firebox.

Advantages and disadvantages

For apartments where chimney channels are not provided, for the preparation of water for the needs of hot water supply previously there was only one solution - an electric storage water heater. With the advent of pressurized flow heaters, residents of such apartments have an alternative. This is one of the main advantages of columns with a closed combustion chamber. And here are the rest:

• there is no need to organize the flow of combustion air into the house, the usual supply and exhaust ventilation required in accordance with the standards is sufficient;
• high efficiency of work, which means - profitability;
• gas water heaters without a chimney are fully automated and create additional comfort during operation;
• tandem fan - burner successfully smooth out the water temperature drops when opening several taps within the available power;
• getting into the room of various combustion products is practically excluded.

Like any other water heater, a closed-type chimney column has some disadvantages. One of them is the high cost of the product compared to conventional flow-through units. The reason is the presence of additional expensive elements and parts in the design. But look at the problem from a different angle in such a situation: the installation of the heater is planned during the construction phase of the house. And consider what will be cheaper: the device of a traditional chimney and the purchase of an ordinary column, or the installation of a coaxial pipe and the purchase of a turbocharged unit.

The heater, which uses a closed combustion chamber and fan, generates some noise during operation. In addition, the device is completely dependent on the availability of electricity, therefore it cannot be used in areas with frequent outages. Or you will need an alternative source of electricity, such as a gasoline or diesel generator.

Due to the complexity of the design, do-it-yourself maintenance and cleaning of the water heater is excluded. If you decide to install a turbocharged column, be prepared to contact the service department for troubleshooting. More information about the products can be found by watching the video:

The principle of operation of the turbocharged column

The principle of operation for all water heaters is the same - when you open the hot tap on the mixer in the device, the burner ignites from the pressure of the flow and begins to heat the water in the heat exchanger. The difference between the work of a gas water heater with a closed chamber is as follows:

• when the column is in standby mode, the burner igniter does not burn;
• when the DHW tap is opened, the flow sensor is triggered, the membrane bends and the gas valve opens the flow of fuel to the burner;
• sparking occurs at the command of the controller; after the flame has appeared, the sensor detects its presence, and the sparking stops;
• after the appearance of a flame, a fan turns on, which draws smoke into the chimney;
• the temperature of the coolant is maintained by the column automatics at a given level; so that the liquid does not overheat, the modulating burner reduces the combustion intensity.

Due to the design, the efficiency of devices with a closed chamber is higher than that of analogs with an open firebox. For the first, the indicator is 88-95%, for the second - 80-88%. Efficiency is achieved in the following ways:

• due to precise dosing of the required volume of air and fuel;
• flame modulation maintains the set temperature without consuming excess fuel;
• the air coming from the street to the burner is preheated in the coaxial pipe from the heat of the outgoing smoke.

The use of a coaxial chimney makes it possible to return some of the heat that goes away with the smoke.

Read here how to connect the gas column duct?

The safety system of the device with a closed firebox includes the following elements:

• flame sensor;
• chimney draft sensors;
• temperature sensors;
• automatic gas valve that controls the fuel pressure at the inlet;
• safety water valve that records the working water pressure.

Automation stops the operation of the device in the following situations:

• power outages;
• the pressure in the water supply system exceeds 10 bar;
• the burner has gone out;
• the controller is out of order;
• the boundary temperature of the coolant was exceeded.

Some models are equipped with the function of cooling the heat exchanger with a fan if the maximum possible water temperature is exceeded.

Many turbocharged models have an anti-freeze function for the heat exchanger. It works according to the following principle: if the room temperature drops below 0, the automation will turn on the electric heating element, which heats the heat exchanger to prevent water from freezing. "Anti-freezing" will prevent damage to expensive equipment in case of shutdown of the heating system in winter.

What is the difference between a speaker with a closed chamber?

For water heaters with an open hearth, combustion air is taken from the room in which the device is located. And the flue gases leave through the chimney. In turbocharged models, oxygen is forced from the street using a fan through a coaxial chimney. With the help of the same system, smoke is taken out into the street.

The coaxial chimney, which is connected to a turbocharged column, has a design of two channels of different diameters, which are inserted into one another. Through the inner pipe, the combustion products go out into the street, and through the outside air enters the burner.

Pros and cons of turbocharged speakers

The installation of a gas water heater with a closed combustion chamber is easier than an analogue with an open firebox. In addition, the installation of this device requires compliance with a smaller number of fire and building codes. Therefore, turbocharged appliances are mainly installed in apartments. After all, not every apartment meets all safety requirements and has good ventilation.

Turbocharged geysers have a lot of advantages:

1. Good performance.
2. Tightness - a closed chamber prevents flue gases from entering the room.
3. Convenience of placement and operation.
4. High automation to ensure safe and economical operation of the column without user intervention.

There are devices with a closed firebox and certain disadvantages that should be considered when buying:

1. High price.
2. Dependence on electricity.
3. Can only be repaired by a service center.

If power outages in your area are rare and there is a service center for gas water heaters within reach, it is better to purchase a turbocharged model. Its price will quickly pay off due to gas savings, and the precise operation of the automation will delight users with a high level of comfort.

Installation of a gas water heater

The installation of a gas water heater will require the involvement of a certified gas engineer. Regardless of the type of unit, it is connected to a gas pipeline and water pipes.The only limitation that can be imposed by the type of combustion chamber used in this water heater is the installation location. If the chamber is closed, then both the flow of air and the removal of combustion products are carried out by electric fans, which greatly simplifies the calculation of the parameters of the chimney. Usually, a short coaxial pipe is successfully used, which goes outside directly through the wall of the house closest to the unit. In addition, a closed chamber does not require the installation of a water heater in a well-ventilated room. Unlike a closed chamber used in most storage water heaters, a natural draft chamber (open) requires a constant supply of fresh air both for the normal preparation of the gas-air mixture on the burner and for ensuring the removal of combustion products. Thus, the installation of this unit, for example, in a bathroom, is impossible - unless there is a window to the street in it, which will have to be kept open during operation of the heater, or an air supply unit of sufficient capacity, which provides three times complete air renewal in the room in an hour. Most modern gas water heaters are equipped with such chambers.

Characteristics of a geyser with a closed combustion chamber

Unstable DHW (hot water supply) is gradually becoming a thing of the past, and in its place are models of new developments of water heaters operating on natural gas. An acceptable option for both apartments and private houses with no chimney duct is a gas water heater with a closed combustion chamber. This modern device is also called a turbocharged or non-chimney flow-through, since it does not need a chimney to eliminate exhaust gases.

Advantages and disadvantages of gas flowing water heaters

As we have already said, gas flowing water heaters have a number of advantages and disadvantages. In some ways, their use is quite justified, and in some cases, it is desirable to use electrical equipment. Key benefits:

• Economical - the use of gas water heaters allows you to spend less money on the preparation of hot water. The savings are most noticeable with heavy use;
• Powerful electrical wiring is not needed - electric instantaneous water heaters, if normal performance is needed, will require laying a separate supply line. You also need good grounding;
• They can work in non-gasified premises - for this you need to purchase a model with the ability to power from a gas cylinder.

There are also a number of disadvantages:

• Complexity of installation and connection - it is advisable for a specialist to do this;
• The need for regular maintenance - you have to pay for this separately;
• Possible gas leaks - the high explosiveness of natural gas forces you to carefully monitor gas equipment. For example, a piezo-ignited column needs to be extinguished when no one is at home;
• It takes time to warm up the water - the same electric storage water heaters supply hot water almost immediately.

Despite certain drawbacks, it is customary to install gas flowing water heaters in gasified houses - they are economical and capable of providing several points of water intake with hot water at once.

Differences between a turbocharged device and a conventional one

An important design feature of the device is a closed chamber, into which air from the street enters with the help of a fan (turbine). Conventional water heaters use room air during burner operation through the opening located at the bottom of the column.

Any device that runs on gas emits toxic substances that must be removed to the outside. The turbo column is no exception, only here, instead of the usual chimney, a horizontal pipe (coaxial) is used, through a hole in the wall leading to the street. Gas water heater with a closed combustion chamber has a few more features:

• for complete combustion of gas, the turbine delivers street air using a coaxial double-walled (double-circuit) chimney, through which toxic gases are discharged to the outside;
• the device of the device is equipped with multi-stage and modulating burners that can change the power and intensity of heating;
• there is no constantly burning igniter, piezo ignition button or conventional batteries to start the process of heating water;
• the turbocharged column fully works in automatic mode from the moment of ignition until it is turned off;
• the electronic unit (controller) regulates the air and gas consumption in an optimal ratio with the corresponding heating mode;
• smokeless devices operate from the mains.

Typically pressurized gas water heaters with a coaxial chimney are equipped with an electric ignition system with electrodes to generate a spark. But in some types of columns, a mechanical hydrogenerator is involved, which generates energy from a moving water stream. Based on the features of the devices, it can be seen that they are endowed with many functions that increase the comfort and safety of operation.

Types of storage water heaters - 3 main sources of energy

By the type of energy used, water heaters can be divided into 3 types:

1. Electrical

The water in the tank is heated using an electric heater, usually these are replaceable tubular electric heaters (TENs). They are dry or wet. As the name implies, some have contact with the heated liquid, while others do not.

1. Gas water heaters (boilers)

Heating of water in the tank occurs from the combustion of liquefied or main (natural) gas in the combustion chamber. Depending on the combustion method, a distinction is made between closed or open types of chambers.

Modern devices operating on gas have a sufficiently high efficiency, therefore, during operation, the emission of exhaust gases into the atmosphere is minimal. For this, special coaxial-type chimneys are used.

1. Combined water heaters

For heating, (usually) 2 types of heat energy are used. In most cases, these are heating elements and indirect heating from the coolant. Indirect heating occurs due to the coolant, which, passing its way along the first circuit, gives off heating energy to the water in the second circuit. And indirect is called so, because the heating of the coolant is heated from another source, which can be a boiler, a solar system, a heat pump, etc.

Supercharged unit operation

All gas flow structures operate according to the same principle: when the hot water valve in the apparatus is opened, the burner ignites under the flow pressure and begins to heat the liquid circulating through the heat exchanger. In a smokeless appliance the process happens a little differently:

1. While in standby mode, the device is connected to the mains. There is no combustion process in the chamber, since there is no igniter.
2. When the mixer tap is opened, the flow sensor and the membrane of the water unit are turned on. Under its action, a valve is triggered, which opens gas access to the burner mechanism.
3. The controller sends a command to the electrodes located next to the burner, a spark appears, which ignites the gas. The sensor reacts to a flame and signals to the control unit that the formation of a spark stops, and at the same time the turbine that blows air is turned on.
4. When the DHW tap is closed, the gas supply stops, the burner goes out, therefore the water heating process is completed.

Thanks to the improved design, the efficiency of the turbocharged unit reaches 88-90%, while the usual atmospheric 84%. Efficiency is determined by the following functions:

• accurate metering of the supplied gas and air required for the combustion process;
• maintaining the required temperature regime - a function that allows you to save gas, since the consumption for excessive heating is excluded;
• preheating of the street air flow with a coaxial chimney.

This function is most effective in compensating for the heat that is carried away with the gas toxins. Cold air, flowing through the same pipe, only in a different plane, takes heat from the oncoming smoke waste through the steel wall of the inner pipe.

The gas water heater with a coaxial chimney is endowed with protective safety equipment. They work in situations like this:

• lack of draft in the chimney due to the termination of the operation of the turbine, which stopped when the electricity was cut off;
• the burner spontaneously went out;
• reduced water consumption;
• failure of the controller function.

The principle of operation of a storage water heater

Boiler working principle based on the natural separation of cold and hot layers of water. Hot water, due to its lower density, rises upward, while cold water remains below. Let us describe in more detail the principle of operation of the water heater.

Water heating is provided not only by the burner, but also by the removal of combustion products. The chimney is designed in such a way that the smoke is evenly distributed over the steel pipe, its walls are heated and exchange heat with water. The operation of the burner is controlled by an electrical element, which turns off the burner when a certain temperature in the tank is reached.

As soon as the consumer starts consuming hot water from the tank, pressure drops inside him, and cold water rushes into the container from the water supply. A divider is installed on the supply tube, which reduces the flow of water and its speed by dividing one large flow into many smaller ones. Thus, cold water stays at the bottom exactly where the burner is installed. The electronic unit is triggered when the water in the tank is cooled and turns on the burner. This is how a gas water heater works in normal mode.

Benefits of a smokeless appliance

A geyser without a chimney does not exist, and in devices with a pressurization function, its design has been simplified. Now you can use turbocharged devices not only in private houses, but also in apartments. You just need to make a hole in the wall that communicates with the street and through it bring the chimney horizontally along the shortest path.

If necessary, the coaxial chimney can be installed vertically on the roof of a private building, having previously prepared a shaft made of non-combustible material for it. There are other advantages of a column with a coaxial chimney:

1. It is characterized by high efficiency and economy when compared with conventional water heating devices.
2. The closed combustion chamber eliminates hazardous flue gas emissions and unpleasant odors in the room.
3. Simple installation of supply and exhaust ventilation, since you cannot do without it.
4. The presence of a high degree of automation of the coaxial apparatus brings convenience in the operation of the equipment.
5. The function of an energy carrier can be performed not only by natural gas, but also by liquefied gas. But this requires the use of a special hood, arranged closer to the floor (propane is heavier than air).

In addition to sensors that ensure the safety and temperature of the water, the turbocharged units have an anti-freeze system for the heat exchanger. The principle of operation is as follows: at a negative temperature in the room, a heating element is automatically turned on, powered by electricity, which heats the heat exchanger and does not freeze the water.

The anti-freeze function in the coaxial column will be useful in the event of an emergency shutdown of the heating system in winter. It will prevent expensive equipment from defrosting and failing.

Criteria for choosing a water heater

It is not allowed to install gas boilers with an open combustion chamber in the apartment.

When choosing a suitable model of a household gas water heater, first of all, attention is paid to its performance - the volume of heated water.The indicated value is usually given in the technical data sheet and is expressed in liters per minute when the liquid is heated to 25 ° C.

Boiler devices for obtaining hot water supply in their efficiency are somewhat inferior to gas heating boilers (no more than 3-5 percent). On the other hand, the efficiency of models of different classes (with an open and a closed chamber) is practically the same, so when choosing this indicator is not paid attention.

You will need to consider the following important points:

• With a limited user budget and living in areas with frequent power outages, a simple non-volatile open-type model would be the best option. Its ignition system is powered by a piezoelectric element or from batteries located in a special compartment. They are usually enough for 2-3 months of intensive work.
• According to the instructions for use, open-type systems are not allowed to be installed within the living spaces of modern apartments. In private houses, a separate room is allocated for them (analogous to a boiler room).

The latter requirement is explained by the absence of special chimney ducts within the residential premises.

The removal of combustion products through the ventilation shafts available in city apartments is strictly prohibited.

Cons when using the device

The disadvantage of a coaxial gas column is volatility. If there is a power outage, there will be no hot water. You will need to use an electric generator or a reliable uninterruptible power supply. Other negative aspects of these devices:

1. A coaxial gas unit is almost twice as expensive as an atmospheric one. But when comparing the purchase and installation in a complex, a coaxial chimney will cost much less than making it out of bricks or installing an insulated sandwich.
2. Fan noise is heard on some speaker models.
3. It is better to entrust cleaning of the device to a specialist. Modern equipment has a complex structure, therefore, it is not recommended to try to find a malfunction on your own and eliminate it.

To carry out the installation of this type of unit, the permission of the organization supplying natural gas is required. You should also notify the neighbors that a chimney will be installed on the facade of the house.

Boiler column with a closed chamber

This is a type of gas devices, which is a reservoir in which water is heated, and then spreads along pipe lines to water points. The water in the tank is constantly hot, and not at the moment the DHW tap is opened, as when using a flow-through heat generator. The non-flue column works according to the following principle: when the temperature in the tank drops, the temperature sensor sends a signal to the burner to turn on. During the operation of the burner, hot air enters the flame tube surrounded by water and transfers heat to it. As soon as the water heats up to the set mode, the burner turns off.

The container of the device is equipped with thermal insulation, therefore, like a thermos, it can keep the temperature for a long time. You can always use hot water instantly and in the required amount. The capacity of the storage tank is different for all models, ranging from 10 to 500 liters. The body is made of steel, covered with enamel or glass porcelain. The main advantage of the boiler is the use of a large volume of hot water even when the water supply is completely cut off.

But, like any technological design, a turbocharged column has a drawback - hot water remains between the DHW valve and the tank, which then cools down. Therefore, the user, having opened the tap, has to wait for the cold water to drain.

This problem is solved by a circulation system consisting of a small pump connected with a small diameter pipe to a pipe system leading to the end points. With the help of the pump, the remaining unused water is pumped back into the tank, this prevents it from cooling.

Recommendations when choosing

It is impossible to give any specific advice regarding the place of purchase of the gas appliance. You need to focus on stores that are known for the quality of service, a variety of assortments, and the presence of decent models.

In specialized stores of plumbing and heating equipment, a large selection of products is presented, with the characteristics of which can be seen live, to evaluate the appearance of the column. Purchasing through the online store also has its advantages - the ability to exchange and return the goods within two weeks, without specifying the reasons, a huge selection, ordering a rare model, familiarizing with the reviews of other buyers.

The Neva gas water heater with a closed combustion chamber is popular. This equipment is characterized by instantaneous heating of water, the use of liquefied gas, the ability to connect to bottled gas. Based on the practice of operation, it is known that with the help of this device it is possible to obtain 6 liters of hot water per minute. The flow column is equipped with sensors and timers, which are responsible for the high-quality operation of the device. It has a power of 9 kW.

When purchasing a gas water heater, first of all, you should make sure that there is a decent security system for comfortable use of the equipment. It must be equipped with sensors that monitor flame, overheating and chimney back draft. You can choose any ignition option based on your preferences and wishes.

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American Water Heater Company MOR-FLO G61-40T40-3NV (151 l.) Gas storage water heater Non-volatile gas storage water heater with the ability to operate at low pressure of water and gas. RUB 24,410	American Water Heater Company MOR-FLO G61-50T40-3NV (189 l.) Gas storage water heater Non-volatile gas storage water heater with the ability to operate at low pressure of water and gas. RUB 29,020	American Water Heater Company MOR-FLO G62-75T75-4NV (284 l.) Gas storage water heater Non-volatile gas storage water heater with the ability to operate at low pressure of water and gas. RUB 57,730
Ariston NHRE 18 Ultrafast floor standing gas storage water heater 6480 Among the main distinguishing features of the NHRE 18 model electric storage water heaters is a relatively high level of efficiency, as well as absolute reliability and safety. RUB 186,050	Ariston NHRE 26 Ultrafast floor standing gas storage water heater 6481 Among the main distinguishing features of the NHRE 26 model electric storage water heaters is a relatively high level of efficiency, as well as absolute reliability and safety. RUB 204 660	Ariston NHRE 36 Ultra-fast floor-standing gas storage water heater 6482 Among the main distinguishing features of the NHRE 36 electric storage water heaters is a relatively high level of efficiency, as well as absolute reliability and safety. RUB 217 160
Ariston NHRE 60 Ultrafast floor standing gas storage water heater 6483 Among the main distinguishing features of the NHRE 60 model electric storage water heaters is a relatively high level of efficiency, as well as absolute reliability and safety. RUB 248,030	Ariston NHRE 90 Ultrafast floor standing gas storage water heater 6484 Among the main distinguishing features of NHRE 90 electric storage water heaters is a relatively high level of efficiency, as well as absolute reliability and safety. RUB 272,890	Ariston S / SGA 100 Wall-hung gas storage water heater 6270 Natural draft SUPER SGA open-chamber gas storage water heaters provide a comfortable hot water supply in your home, regardless of the number of open taps and the temperature of the incoming water. RUB 16,120
Ariston S / SGA 50 Wall hung gas storage water heater 6268 Natural draft SUPER SGA open-chamber gas storage water heaters provide a comfortable hot water supply in your home, regardless of the number of open taps and the temperature of the incoming water. RUB 14,260	Ariston S / SGA 80 Wall hung gas storage water heater 6269 br> SUPER SGA open-chamber natural gas storage gas water heaters provide a comfortable hot water supply in your home, regardless of the number of open taps and the temperature of the incoming water. RUB 14,860	Ariston SGA 120 Floor standing gas storage water heater 7728 The main distinguishing features of the SGA 120 R electric storage water heaters are efficiency, simplicity and a high level of convenience during operation. RUB 18 600
Ariston SGA 150 Floor standing gas storage water heater 7729 The main distinguishing features of the SGA 150 R electric storage water heaters are efficiency, simplicity and a high level of convenience during operation. RUB 21,070	Ariston SGA 200 Floor standing gas storage water heater 7730 The main distinguishing features of the SGA 200 R electric storage water heaters are efficiency, simplicity and a high level of convenience during operation. Read also:  How to pump the coolant into the heating system? RUB 22 320	Baxi SAG2 100 Wall-hung gas storage water heater Accumulative water heaters BAXI can be used both for domestic and industrial purposes. RUB 32,440
Baxi SAG2 125Т Floor standing gas storage water heater Accumulative water heaters BAXI can be used for both domestic and industrial purposes. RUB 51,870	Baxi SAG2 155Т Floor standing gas storage water heater Accumulative water heaters BAXI can be used for both domestic and industrial purposes. RUB 57,300	Baxi SAG2 195Т Floor standing gas storage water heater Accumulative water heaters BAXI can be used both for domestic and industrial purposes. RUB 69 160
Baxi SAG2 300Т Floor standing gas storage water heater Accumulative water heaters BAXI can be used both for domestic and industrial purposes. RUB 118 190	Baxi SAG2 50 Wall-hung gas storage water heater Accumulative water heaters BAXI can be used for both domestic and industrial purposes. RUB 28 310	Baxi SAG2 80 Wall-hung gas storage water heater Accumulative water heaters BAXI can be used for both domestic and industrial purposes. RUB 29 840

A lot of wonderful foreign household appliances, adapted to our operating conditions, are supplied to our country. Gas storage water heaters are manufactured by the Italian company BAXI, Ariston in wall and floor versions, operating stably regardless of the gas and water pressure at the inlet. Non-volatile water heaters that function even with low water quality are manufactured by the American Water Heater Company (USA).

The main advantages of gas storage water heaters are efficiency in operation and comfort provided to a person in a place with a large supply of water. This more than compensates for some of the difficulties in installation and the rather high price of the device.

Each of the produced types of such water heaters - with natural draft and with forced draft - has its own advantages. Water heaters with an open combustion chamber, that is, with natural draft, gain in price: their cost is 1.5 times lower than heating devices with a closed combustion chamber.

But on the other hand, the latter, which have forced draft, do not need an additional flow of air to maintain the combustion process. And also instead of an expensive traditional chimney, you can build a shorter, coaxial one.

Also, on our website in a wide range of electric storage water heaters Stiebel Eltron