Wall mounted boilers: types, selection criteria and repair recommendations

Gas heating is one of the most convenient ways to heat a dwelling. The autonomy of the mode of operation of the equipment allows you to do without its constant maintenance. For a long time gas boilers were installed on the floor. But the large size of the equipment could occupy most of the living space. The solution to this problem was the wall gas boiler.

The gas wall boiler, it does not matter whether it is double-circuit or single-circuit, like any other device, has both a number of advantages and disadvantages.With a detailed study of the structural and functional features of this equipment, you will be able to dispel all doubts that have visited you regarding its acquisition.

So let's start with the merits of a wall-mounted gas boiler.

1. Installation on the wall surface will save a huge part of the living space. Everything else, many models produced to date can be embedded directly in the kitchen cupboard.
2. Having a full package of components will not require you to install additional devices around the equipment. All necessary components are hidden in the gas boiler body. In this regard, the interior of your kitchen will not suffer.
3. All models of gas wall boilers are capable of conversion. If you wish to operate equipment with a different type of fuel, you only need to replace the nozzle and adjust the settings.

Among the shortcomings can be identified a number of factors.

1. Gas heating boilers are extremely sensitive to the chemical characteristics of the heat source. To eliminate this drawback, the owner will need to install a special filter to soften the water.The filter is installed at the junction of the heating system and water supply. When deciding not to install a filter, it is recommended to annually invite a specialist to audit the equipment and clean the heat exchanger.
2. For a double-circuit gas heating boiler, it is common to turn on the hot water supply using a three-way faucet. When it is turned on, the heating of the heat carrier stops for a while. As a rule, hot water is not used for long, and therefore the water in the boiler does not have time to cool.
3. Even the highest quality wall gas boiler has a small capacity. This is due to its structural features, and therefore this type of equipment is completely unsuitable for heating large living spaces.

Today, there are two types of gas wall boilers: single-circuit and dual-circuit. The first is suitable solely to heat living space. This is due to the presence of a single heat exchanger. But there is the possibility of connecting the boiler, which is able to equip the room with hot water.The single-circuit boiler is good if you do not need hot water, and there are more than two taps or shower cabins in the living room.

Dual-gas boiler is equipped with two heat exchangersTherefore, the equipment not only heats the living space, but also warms the water. The weak point of this equipment is the need to wait some time while the water warms up. Only after that the water supply will be possible. Everything else, the simultaneous use of a shower and a wash basin is undesirable. Otherwise, one of your family members may get burned with hot water, while the other will receive a stream of ice water. But also the double-circuit boiler is subject to corrosion and scale formation, and therefore the use of this equipment in the presence of hard water is undesirable.

At the moment, the best material for the manufacture of the heat exchanger is copper, which is protected from corrosion and scale, is an excellent conductor of heat.As a rule, equipment made of copper is lightweight. The presence of copper nodes is undesirable in boilers with high power, but for the wall model they will last for many years. Another common material for the manufacture of the heat exchanger is stainless steel. Used for budget models of wall-mounted boilers, and therefore has a low cost, compactness and excellent thermal conductivity. But it is worth noting that the lifetime of such equipment is extremely small. Cast iron for wall-mounted gas boilers is rarely used because of the huge weight.

As a rule, most manufacturers produce standard-sized wall-hung boilers with a length of seventy-three centimeters, a width of twenty-nine centimeters and a depth of forty centimeters. But there are more dimensional models, the length of which reaches ninety centimeters, and the width of fifty centimeters.

All gas wall-mounted boilers, as a rule, are equally equipped, only the external component changes. However, for each specific modification, some nuances are peculiar. For example, a single-circuit device can be equipped with an external boiler in order to warm the water. A dual-circuit device can be equipped with a combined heat exchanger, which prepares the coolant for each circuit.

So back to the internal components of the gas boiler.

• Any gas equipment is equipped with a gas burner. As a rule, it has a rectangular shape and a mechanical gas diffuser, due to which uniform gas distribution inside the equipment is ensured.
• Another important element of the gas boiler is a heat exchanger, which is a box of metal with an integrated radiator grid. Thanks to the energy received from the combustion of gas, this element warms up and transfers its heat to water.
• The presence of a circulation pump is not typical for all models of gas boilers. As a rule, it is found in equipment with forced circulation.

• The expansion tank is necessary in order to temporarily divert the coolant, in case it continues to heat up and expand intensively. In order to warm a large room, you need to install an additional tank.
• At atmospheric gas equipment, the outlet connections must be connected to individual chimneys, which have a natural draft. Turbocharged model has a set of double coaxial tubes, in order to remove gas waste through the thrust straight into the built-in ventilation.
• Automatic control system will make the work of the gas boiler extremely comfortable. In essence, this is an electronic circuit that sets a mode that allows the system to function independently depending on previously established criteria and indicators from embedded thermal sensors.

Japanese instruments and equipment made in Italy have quite good reviews. Their rating is quite high.

Brands like Bosch, Viessmann, Beretta, Baxi are popular among many people. But it is also worth noting affordable products from the company "Danko" ("Agroresurs"), in connection with which there is a huge demand for it. And the Daesung brand from Korea, recently enjoying great popularity among consumers. What distinguishes the above listed brands, what are their strengths and weaknesses, let us examine in detail.

Speaking of the German manufacturer of wall-mounted boilers Bosch, the word quality immediately comes to mind. And indeed, it is this criterion that determines all manufactured products by this brand, which, by the way, has been operating for more than twenty years. And if you follow the recommendations for operating the wall-mounted boiler, it will serve you much longer than the stated warranty period. The Bosch boiler is distinguished by an integrated self-diagnosis system and automatic settings. For example, when a flame of flame burns out in a burner, the gas automatically turns off. The boiler functions from natural or reduced gas. The heat exchanger is manufactured using a material such as copper, which is subsequently coated with a thin oxide layer to help protect the wall boiler from corrosion.The equipment has a compact size and fits perfectly into almost any interior. It is possible to place the boiler even in a hinged kitchen cupboard.

Thanks to the Viessmann brand, the wall mounted boiler has acquired several modifications. Namely: the equipment can be both single-circuit and dual-circuit. The improved chimney and its internal structure does not allow frost to form on the surface of the equipment. The compactness of the boiler allows the membrane expansion tank to fit six or even ten liters. The wall-mounted gas boiler from the brand Viessmann will delight you with quality and efficiency of ninety-three percent.

Italian manufacturers, one of which is the notorious Beretta, are distinguished by high build quality and equipment power from twenty-four kilowatts. The wide range will surprise even the most selective consumer. Beretta produces single and double circuit boilers, with or without a boiler. The built-in boiler for sixty liters, thanks to the expansion tank, can increase the volume.

Wall mounted gas boiler from the Italian brand Baxi stands out among other equipment the presence of an atmospheric burner, which makes the device almost silent. The heat exchanger is made by bithermic technology. Capacity ranges from ten to eighty kilowatts. The compactness of the brand equipment allows products to be in great demand among consumers. The claimed efficiency is ninety percent. The warranty period is seven years.

A wall mounted gas boiler made in Korea under the Daesung brand also does an excellent job of heating the living space. The strength of this device is a heat exchanger, one part of which is made of copper alloy, and the other part of the steel plate. Thanks to this design, the water heats up instantly. Built-in stabilizer works from one hundred fifty to two hundred eighty volts. In addition, the boiler has protection against overheating, overcooling, gas leaks and sudden pressure surges. The equipment can be used with the remote control.

From domestic products can be noted the aforementioned brand "Danko". Wall-mounted boilers are different from their foreign counterparts of energy dependence. However, the climate in Russia and all kinds of interruptions in electricity make this feature a huge plus for the Russian consumer. We should also note the quality and durability of the equipment. The only drawback of wall-mounted boilers "Danko" is the need to purchase additional components: a pump, a regulator and an expansion tank.

In order to correctly select the wall gas boiler, which will not disappoint you in the process of operation, It is recommended to decide on a few nuances.

• First of all - how much hot water you need, how many people will use the water, is there a need to simultaneously include several sources of water, such as a shower or a kitchen faucet.
• The required volume and capacity of the gas boiler, which depends on the heated room.
• Type of heating system. What type of circulation will be required: forced or natural. The latter type does not require additional purchase of the pump.
• Your financial capabilities.The quality of the purchased equipment and components will depend on the budget, which you are willing to spend.
• The level of comfort depends on whether the equipment will have a remote control system or not.
• Manufacturer or brand of equipment purchased.

For example, for a fragile foreign technology, it is imperative to purchase a voltage stabilizer, and some models are in principle not designed for the use of domestic hard running water.

Most economical to put in your house turbocharged version. Its repair will not be very frequent. And also it is easy to attach it to the pipes in the corner of the corner kitchen.

To ensure that the operation of the gas wall boiler is safe, It is recommended to purchase several components:

• in case the fire flame in the equipment goes out, the pre-installed flame sensor will automatically stop the gas supply;
• the need for a thermostat is due to the fact that in case of an emergency increase in the temperature of the water the boiler will automatically stop working;
• automatic blocking of equipment to shut off the gas supply in case of emergency situations;
• gas boiler control thrust sensor.

Bosch double wall gas boiler is suitable not only for heating living areas up to one hundred and eighty square meters, but also for supplying hot water. This equipment, having separate heat exchangers, will perfectly fit into conditions where the water supply is rich in calcium and magnesium. To set up the control, it is necessary to connect the boiler to the power grid of two hundred twenty volts.

Another example of double-circuit gas equipment, but from the Baxi brand. This model is good because it has a closed combustion chamber. This allows the equipment to supply the required amount of hot water and heat the space with a large area.

The gas wall boiler Viessmann Vitopend is an example of a high-quality single-circuit model. It copes well with the heating of both small apartments and large residential areas. Additionally, by installing a boiler with indirect heating, this model can be used as a source of hot water.

To choose which boiler to choose, see the next video.