Floor gas heating boilers: + species selection criteria

Russia is a country with a very harsh climate. The greater part of its territory, winters are very cold. Availability of heating in homes is vital. Practice shows that the best one for heating of the building organizations is the use of gas as a fuel, but by the popular - floor gas units.

We will talk about what constitutes floor gas heating boilers. Of articles provided by us, you will learn how the equipment, what is needed for stable uptime. In order to facilitate the selection of the optimal model, we assort the main criteria and characteristics of the best options.

Why choose floor type boilers?

Manufacturers gas boilers produce a variety of modifications heaters. All of them can be divided into floor and wall unit.

Recent are compact and good performance. Still, many people prefer outdoor equipment, due to its significant advantages.

The benefits of outdoor boilers are:

• More power. The design of the instrument is such that they are capable of delivering much more than wall power counterparts.
• Nonvolatile models that can permanently or temporarily working with the coolant, moving without the use of a pump.
• Durability and reliability of the equipment. Properly selected and installed the boiler, provided sound operation can work 50 years or more.
• Efficiency and ease of operation. Floor boilers in contrast to the wall often available without integrated automation and auxiliary equipment. This significantly simplifies the device maintenance, repair and prolongs service life.

Of course, the use of outdoor equipment and involves some inconveniences and limitations. These include the mandatory presence of a separate room - the equipped boilerIn which the boiler is to be placed.

There are a number of requirements for such rooms, each of them should be strictly respected. Otherwise not be able to get a permit for the installation and commissioning of gas equipment.

The dimensions of the furnace or boiler are selected based on the fact that there was free to fit not only the boiler, but also all the necessary accessories. It snips requirements while also taken into account.

The need for combustion equipment increases the cost of installing the boiler. Besides this will take another arrangement of the chimney, floor preparation, etc. Accordingly, the cost of the floor of the boiler installation will be much higher than the wall.

Variety of outdoor heaters

Boilers can be classified on various grounds. Let us examine the main characteristics that affect the quality of the product.

The number of circuits in the device

The boiler may be incorporated one or two working circuit. In the first case, the device will only warm the coolant, i.e. to function as a heater.

Such equipment is equipped with a heat exchanger, which greatly simplifies the design and reduces the size. It is true the latter depends also on the capacity of the machine. If you set single-loop equipment that will need to purchase an additional unit for heating water.

In this case, we can put additional Indirect heating boilerFor example, or any other device. Single-boilers for heating selected objects do not require hot water or for a large area of ​​houses, where all the power of the device will go on heating buildings.

Combi models can simultaneously heat the heat transfer fluid and to heat water for domestic use. AT combi boilers two heat exchangers are built, which significantly complicates the design.

There are models with a so-called bi-thermal heat exchanger, which is divided into segments. One of them moves coolant, otherwise - heating water. Such devices are compact as possible, but are less reliable and easy to operate.

The best option can be considered aggregates with two completely separate heat exchangers. They produced less scale. Moreover, the contours are separated, so the heating segment overlap when dispensing hot water is not required. Whereas in a bithermic heat exchanger boilers is exactly what happens.

Combi boilers optimally used for small residential buildings. Large areas require mandatory separation circuits, due to safety requirements, the lack of overall power and others.

Type combustion chamber

heating boilers can be equipped with a camera or open the closed type. In the first embodiment, only the natural draft is used to operate the unit.

This implies that the necessary oxygen for combustion enters the chamber from the room in which the appliance is installed. Boiler without the help of any additional equipment takes necessary for its operation, the amount of air.

Thus in the room should be equipped effective ventilation. In addition to the normal operation of this type of boiler must be installed full chimney vertical type, which normally provide traction. The advantages of the boiler with the camera include the volatility and relatively low cost, but they give out less power.

Devices with a camera closed form are characterized by having a fan that supplies air into the unit and discharging therefrom flue gases. Therefore, the boiler does not take oxygen from the room.

The chimney, in this case also differs considerably. installed coaxial systemWhere two tubes nested one inside the other. The internal combustion is intended for removing products and foreign supplied outdoor air.

Coaxial chimney can be set not only vertically but also at an angle horizontally. The presence of the fan ensures stable traction.

The camera closed type increases the efficiency of the boiler. This is due to the fact that there is a maximum afterburning of the fuel. Thus, the merits of such boilers can be attributed a higher efficiency, better performance, lower fuel consumption.

In addition, they are more secure due to the fact that the combustion cycle of the device completely insulated. The disadvantage is the volatility of the devices, which is highly undesirable in areas where it is not rare power outages. In order for the boiler operation does not affect interruptions in electricity supply, it is recommended use UPS equipment in the wiring diagram.

Thanks to the fan heaters are quite noisy and their value compared with similar open chamber is much higher.

The material from which the heat exchanger is produced

floor type boilers can be equipped with three types of heat exchangers. Definitely say which one is better, difficult to analyze the characteristics of each. The heat exchanger of cast iron is not subjected to corrosion. He is insensitive to teploudaram and acid attacks.

With proper operation of such a piece can last 20-30 years. The main drawback cast iron - is its fragility, it is important to take into account during transportation and during operation.

Before installation, it is recommended to carefully check the heat exchanger for cracks. In use, the boiler is very important to maintain the desired temperature and not to allow the temperature difference between the return pipe and fed to the 45 ° or more.

Otherwise, the heat exchanger can crack. Another disadvantage of iron - high weight, which makes the installation components and its subsequent disassembly when necessary.

steel heat exchangers are lighter and more durable. They are not prone to cracking, and are not subject to deformation. Their main drawback is the susceptibility to corrosion and burn-out.

Depending on the quality of stainless steel the average life of the steel site service will be 10-15 years. If the operating conditions are violated, the item goes down much earlier.

Extend the life of the steel heat exchanger is quite simple. Care should be taken so that the temperature inside the boiler does not fall below the "dew point" for the escaping gases. If this happens, condensation forms on the walls of the parts.

It is a carbonic acid dissolved in water. Aggressive material damage the heat exchanger. Thus to constantly maintain a sufficiently high temperature inside the boiler, which leads to greater fuel consumption.

Heat exchanger made of copper characterized by excellent thermal conductivity, corrosion resistance and low weight. But in their boilers floor set is extremely rare. This is due to the high cost and "capricious" metal. In operation, a powerful outdoor unit copper wear out very quickly. For thin wall devices this variant is more suitable.

Device type burner

outdoor boiler burner may be one, or two-step modulation. The first embodiment assumes that the device always produces only one power level. The two-step makes it possible to select one of two levels.

Modulation involves modulating control (modulation) issued by the power device. It should be understood that the maximum power of the heater is not always in demand.

According to specialists, it is used by 15 to 30% of the time, when the device is running. The rest of the period it produces less power.

Thus more economical modulation or at least two-stage burners. They substantially increase the service the heater, due to a decrease in the number of shutdowns / unit.

Ability to work at reduced power provides a significant energy savings. In addition, decreases and the amount of flue gases and other combustion products released into the air. Boilers with modulation and two-stage burners are suitable for use with boilers of diverse capacity.

Using the flue gas

Conventional boilers are convection-type devices and are designed so that the flue gas together with the water vapor immediately discharged outside. However, they can use high temperature and this heat is reused.

Condensing units collected vapor emitted during combustion of the gaseous fuel, whereupon the heat from the heating circuits to redirect. Due to better utilization of the energy produced when gas processing significantly increases productivity either directly boiler and heating circuit as a whole.

Thus possible to achieve significant fuel savings and increased efficiency of the boiler to fantastic 100% -114%. The disadvantages of condensing boilers are usually related to a more complex design, which significantly increases the cost. Conventional devices simpler to perform and much cheaper.

Choosing a floor boiler: how not to be mistaken

Before you go shopping, you should carefully analyze the characteristics of the heated object to a clear understanding of the device operating conditions. Based on this selected hardware features.

Power gas unit

One of the main factors determining the choice of the boiler. Standard reference offer to determine the required power device of this ratio: 10 sq.m building required 1 kW of power produced by the unit.

However, this is a very average figure. This does not include the heat loss of the building, the ceiling height in the room, the number of doors and windows, their insulation and more. If possible, make calculation of the required power boiler should a specialist.

Another point. It is usually recommended to select a boiler with some reserve power. This is true, but this stock should not be large. Otherwise it will lead to rapid wear of the equipment and permanent excessive fuel consumption. For single-boiler power supply should not exceed 15%, 25% for double-circuit.

Fuel consumption Specificity

If possible, it is desirable to choose the most fuel-efficient boilers. These include all the condensation model. As compared with conventional devices in similar conditions, they consume 15-30% less fuel. Can save and electronic ignition system.

Standard pezorozzhigom requires continuous operation of the pilot burner, which leads to gas overrun. it is not necessary for the electronic system. Such boilers have a higher cost, but in the process of exploitation investments quickly pay for themselves.

The optimum number of contours

It makes sense to think about the purchase of a two-circuit boiler only on condition that there is a need for hot water. In this case it is necessary to install the device with two circuits only in the building of a small or medium in size.

For large houses double-circuit boilers installation is impractical, because the capacity of the device to complete the work often is not enough. In addition, the security of the system suffers.

Priority exchanger material

Copper in this case is not considered. Only steel or cast iron. The first option is selected, if desired, to save money. But we must be prepared for the fact that in a few years will have to change the heat exchanger. For trouble-free continuous operation of the boiler unit is selected from iron.

Type design and performance

For outdoor gas boiler efficiency is considered normal, will vary in embodiments from 80 to 98%. Condensing efficiency models differ within the range of 104 to 116%. The higher this value, the boiler is operating efficiently and thus uses less fuel.

For dual-circuit models MAN system performance may vary from 2.5 to 17 liters per minute. Performance and capacity of the unit affect its value, the higher it is, the higher the price of the device.

Best management system

The most convenient and safe to use are the boilers automatic control. They are able to function independently, without the constant control of the owner. This costly complex systems.

Possible to use a low-boilers with manual control, but in this case it will have to work to control turning on / off the device to get a comfortable room temperature.

Excellent option in the gas boiler is a built-in thermostatic sensor. If it is not, it is recommended to purchase and set the thermostatSo as not to expend energy to waste and not to overload the heating equipment.

rules of conduct automatic adjustment unit gas equipment are given in the article, the contents of which we recommend reviewing.

Acceptable design and dimensions

The dimensions of the boiler and its appearance are selected on the basis of the combustion area of ​​a premise. Manufacturers offer a great selection of different models of different designs and sizes, allowing you to choose the device that is most suitable for your particular room. It is important to remember that the boiler and the additional equipment to be provided completely free access.

The best models gas boilers presented in the article, which details the selection criteria, given all the arguments on the basis of which it may be prudent purchase.

The best equipment: consumer opinion

According to the owners gas heating and service professionals equipment among foreign manufacturers can be considered the best German brands Bosch, Wolf, Buderus, Vaillant, Slovak brand Protherm, Italian and Korean BAXI Navien.

Of domestic manufacturers have proven themselves "Plant Konord" from Rostov-on-Don and Zhukovsky ZHMZ. Consider a few models, recognized the best.

Bear 30 KLOM from Prothrem

Floor single circuit device with a camera and an open type heat exchanger made of cast iron. Equipped modulation burner made of stainless steel. There is a possibility of forced resettlement exhaust flue gases.

The heat exchanger is equipped with a security system against condensation, its section can be replaced if necessary. The boiler is compact, has a cooling circuit, the automatic control system and the two operating modes "summer-winter". Device power 26 kW.

EcoVIT VKK INT 366 from Vaillant

Single-loop boiler works by using condensing technology. Able to heat up to 340 sq. m, power - 34 kW. When required to ensure good hot water compatible with the external storage tank. The model has an efficiency greater than 100%, which makes it very economical.

Equipped with multi-touch control system and modulating burner closed. Firing using an economical electronic ignition. The boiler can be connected to an external controller that can be integrated into Smart Home System or control it remotely.

 23.2-3 Comfort AOGV-H from plant Zhukovskogo

Inexpensive domestic boiler with improved environmental performance. Fully adapted for use in Russian environment can stably operate with low pressure gas.

Non-volatile, it can be incorporated into the system with a gravitational or forced circulation. Equipped with a thermometer and a pointer pezopodzhigom. Extremely easy to operate and maintain. The burner is easily cleaned and replaced.

An overview of the popular models of gas boilers, LPG, introduce next articleDevoted to the subject.

Conclusions and useful videos on the topic

Video # 1. How to choose a pot is better: floor or wall, why is recommended to prefer one or the other type:

Video # 2. Apparatus gas boiler floor type:

Video # 3. What to consider when selecting the floor of the boiler:

Outdoor boilers are the most practical choice for arranging independent heating. If necessary, you can pick up the dual-circuit model and provide not only the heating at home, but also the supply of heated water.

Among a variety of heating devices is important to select the correct device, the most suitable for the specific operating conditions. It is not necessary to save and acquire obviously low-quality, but cheap device. A good pot will last a long time and repeatedly pay for your costs. With him in your home will always be warm.

Want to share your own experiences gained during the selection, installation and operation of a gas boiler type of floor? Have useful information that is useful to site visitors? Please write comments in the block located below, ask questions, publish pictures of the article.