The device of a small hearth with a living flame -an obligatory condition in creating an atmosphere of coziness in the country. For such needs, it is necessary to select units of appropriate dimensions with a reliable design and a functional combustion chamber. At the same time, it should be a visually attractive object that fits into the overall stylistics of the room. Such requirements are met by a wood-burning stove for giving long-lasting burning, which also brings an aesthetic effect, and fills the house with heat. Compared with classical designs, this option has several differences, which should be considered when buying. In most cases, such aggregates justify the use in dacha conditions, but there are also unpleasant exceptions.
For models of this kind there is no classicalash-ash pit, since there is practically no combustion products left during operation. But there is a hole through which the wood-burning stove for giving long-term burning is supplied with air. This is a kind of supply nozzle, supplemented by a regulator. Another similar element is installed in the afterburning zone and serves as an air intake. Technologically, the main feature of the design of aggregates with long burning is the need to provide a sufficient supply of air in order to maintain a stable combustion process.
In view of the absence of an ashtail moving fromash box, manufacturers have the opportunity to develop small structures. In a typical version, a wood-burning stove for burning a long burning may not exceed the washing machine in size, although non-standard modifications are also found.
Feature of the concept of prolonged combustionassumes the strengthening of gas generation processes. In this case, there are considered furnaces, which are fueled with firewood, but models that work on coal, pellets and other types of fuel are also common. The main thing remains one - the support of slow decay, during which there is a breakdown of fuel cells. As a result, large volumes of gas are formed and, most importantly, heat is consistently released. In the process of operation of the furnace-fireplaces, heating woods give off incombustible ash and gaseous mixtures. And here we should emphasize another feature of such models - this is the implementation of secondary afterburning. All components emitted during combustion are raised into the upper chamber and re-burned. Just to stimulate secondary afterburning, it is envisaged to actively supply the chamber with oxygen through the nozzles. In comparison with traditional furnaces, the design of which is oriented to intensive work, models with long burning produce more gases and heat.
The main ways of dividing this structure intotypes provide for the consideration of such features as the material of manufacture and the shape of the hull. Most manufacturers use metal in creating stoves of this type of metal, but there are also alternative solutions. The most popular are cast iron and stainless steel structures. There are fewer ceramics models. It would seem that such materials do not have a proper margin of resistance to fire, but the developers envisage the implementation of a lining that improves the heat resistance of surfaces. As for the form, then on the market you can find not only the usual rounded and rectangular, but also corner stoves-fireplaces for giving wood with different dimensions. This form factor allows you to save space in the room, which is especially advantageous when installing the unit in a modest cottage space.
There are two types of furnace designs,realizing the principle of long-term combustion. The first group includes ready-to-use factory models, the installation of which is limited only to the installation of a chimney and the organization of a flat surface. The second group is a more massive furnace structure, which can be made of stone, brick or tile materials. For comparison, if the furnace-fireplaces are cast-iron fireplaces capable of providing heat transfer capacity of 4-10 kW, then in the case of firebox structures this value reaches 15 kW. At individual orders of the unit and this level can be increased, allowing to heat houses with an area of up to 250 m2. Another question is whether the use oflarge firebox in the country? But it depends on the parameters of the structure. By the way, one of the key features of brick furnaces is their integration into the wall, therefore, not every villa will be able to admit such a setup.
If an emphasis is placed on the heating functionfurnace-fireplace, it makes sense to turn to models with a water circuit. These are units that include a heat exchanger, pipes and a storage tank. Depending on the heating requirements, the user selects the configuration and the scheme by which the system will be installed. In this case, a wood-burning stove with a water circuit can be executed in different versions relative to the internal device. The difference between the models lies in the way the contours are arranged. In the standard version, they are placed longitudinally in the combustion chamber and strictly in the center. Also there are also modifications, in which the principle of "water jacket" is realized. This means that the walls have in some sense a double structure, in which water contours are enclosed. The coolant circulates in them, which can be regulated for specific heating requests.
The spread of prices for aggregates with long burningis quite wide. In this segment, there are models for 15-20 thousand rubles, and versions for 50 thousand and more. But it is important to take into account that the fireplace furnace, the price of which does not exceed 30 thousand, is unlikely to be able to supply more than 10 kW. Usually these are compact cast-iron units that can look attractive, but their heating function leaves much to be desired.
Models with a water circuit can be found in the rulersmanufacturers Hark, Schmid and Supra. Here, too, there is a distinction between classes, but in the middle segment price tags dominate by 30-40 thousand. However, you can find more affordable, but quality wood-burning stoves. Inexpensive variants for 20 thousand, in particular, are offered by domestic manufacturers of "Eko kamin" and "Ermak".
Devices of this type demonstrate an example,when optimization of the operating principle of the furnace brings a tangible effect in the course of operation. According to users of such furnaces, with small volumes of supply with solid-state fuel, it is possible to achieve high performance of the equipment even against the background of traditional analogues. For example, once you load a fireplace, you can count on 10-hour support for a certain temperature in the room. With these results, a wood-burning stove to give a long burning time allows you to save money and at the same time to obtain sufficient amounts of thermal energy. This is noted by the owners of small summer cottages with small furnaces, and owners of households, which use powerful models for 15-20 kW.
Still ensuring high resultsPerformance with fuel savings is given at the expense of other characteristics. For example, it takes a long time to switch to the same regime of prolonged burning. And in fact many owners of summer residences just for the purpose of fast heating and get a furnace-fireplace. The reviews note that for such needs it is better to prefer models with intensive combustion, as they enter the optimal temperature phase more quickly. There is also a criticism of the design of aggregates with fireboxes for long burning. The fact is that the withdrawal of secondary combustion products takes place under conditions of a low temperature, which contributes to the excessive formation of condensate. Therefore, the manufacturers themselves recommend to think over the location of chimneys in such a way that the minimum number of transition areas is formed.
Using the mode of prolonged decayprovides many advantages, which are expressed in the form of efficient heating and fuel economy. Especially for large buildings, it makes sense to purchase just such an oven-fireplace. The price of 25-30 thousand for the unit, which has average power characteristics, of course, does not add to the attractiveness of this decision, but with long operation, the economical consumption of wood will pay for itself. On the other hand, if you are considering buying a furnace as a heating system, you can turn to full-fledged boilers that will be more profitable in terms of energy efficiency. Still, the fireplace oven benefits from a combination of heating function, decorative qualities and ease of use. The principle of long burning does not contradict the first two conditions, but from the point of view of ergonomics such units even in their segment are not the best option.
