We tell what the difference between the condensation and convection boiler and we advise you to repel when choosing.
Gas boilers are economical and easy to operate. They are installed in buildings with a small area, and in large multi-storey buildings. Heating of large cottages is a difficult task. It is complicated in cases where the owners do not want to sacrifice precious meters to arrange a separate room - boiler room. The power of the wall instrument may not be enough. Especially if it is used to prepare hot water. Outdoor is allowed to be mounted only in boiler room, isolated from other rooms. There are other important nuances that need to be taken into account in order to choose the right gas boiler for heating at home.
Select the gas boiler and installation rules
What type is betterSpecifications
What is better to choose for the GVA system
Condensate problems and solution
Safe installation
Design of devices
According to the design of the device there are two types.
Convection
Convection appliances - consist of one heat exchanger, burners and electronics required for control.Condensation
Condensation boilers have three heat exchanger. They make it possible to mix cold and hot water. As a result of such a displacement, the process of condensation is underway at which useful energy is distinguished.
What to pay attention to when choosing a gas boiler
Efficiency and level of comfort
Please note how fast the device warms water and what the noise level produced by the equipment during operation.Economy
Perhaps every owner of the cottage seeks to reduce the cost of monthly content and maintenance of the house. Therefore, we recommend paying attention to the design features of the equipment that contribute to the economy. For example, for cooling in condensation circuits, a coolant returns from the heating system is used. Its temperature should be below 55 ° C - otherwise there will be no desired cooling. Therefore, such equipment is effective only in low-temperature systems, and in conventional 90/70 regimens, they are more efficient only by only 3-5%.
For cooling, heat exchangers of an improved design of acid resistant materials should be applied. Condensate contains acids and other aggressive chemical compounds. This hot solution is affected by the metal surface. Most often plastic, stainless steel or aluminum alloy with silicon.
Maximum energy savings when using heat of condensation is:
- during the combustion of natural gas is 11%;
- liquefied gas (propane-butane) - 9%;
- diesel fuel - 6%.
Reliability of equipment
Be sure to specify which materials are the main components and what are their warranty period from the manufacturer.For the reliability of the target, automation is also installed, precisely supporting combustion mode, the temperature of the exhaust gases, water in the reverse line and other parameters of the work.
Ecology
Examine how eco-friendly device, if you care about the ecology of your home and is aware of the importance of environmental protection.
Convenience Montaja
The manufacturer is obliged to take care that the installation does not cause difficulties.When installing or replacing the device, you will need to agree on a certain list of documents. When replacing a similar problem, problems associated with the coordination and serviceability of the system should not arise. In the case of its upgrades, technical calculations will be required.
Outdated technique can be changed to a modern model with minimal material costs, since the hydraulic and gas connection is similar in location. Perhaps it will be necessary to replace the chimney. In general, the design of chimneys in both cases does not differ much. There are features. In the first case, the material must be acid resistant. The equipment is more expensive, but it is more economical.
Ease of Management
Management must be convenient, intuitive and not to cause difficulties from the user.
How to choose a gas boiler for home based on the characteristics?
The selection of the model is primarily determined by the required power. Many manufacturers use built-in secondary heat exchangers and hot water boilers. In wall-mounted devices, the boiler is small. The volume of its tank is usually 30-40 liters. In total devices, it has a volume of 150-100 liters.
You need to decide on water consumption. Double-circuit models, unlike one-contacts, are completely universal. One-contacts can also be used for GVO, but only if there is an additional boiler, which can be purchased separately.
Modern automation is capable of significantly simplifying the equipment management process, including remotely. Electronics allows you to integrate devices into multicomponent systems consisting of basic and several auxiliary heat sources. Automation can control up to four heating circuits and two contours of hot water preparation and helose system.
For remote adjustment, you can use wall panels, such as the electronic thermostat Logamatic TC100 (Buderus) or the DIEMATIC VM ISYSTEM control panel (de Dietrich). Communication with the regulator occurs with low-voltage wired connections. The remaining communications are carried out over the Wi-Fi network. To do this, the house should be equipped with a Wi-Fi router. The ability to program modes of work depending on the time of day and days of the week, to correct the functioning of certain components of the systems. Similar programs can be installed on a tablet computer or smartphone and manage all homemade climate machinery via the Internet.
For premises where people are often present, the low noise level is important when working. For such premises, it is recommended to choose instruments equipped with low noise catalytic burners. They produce noise less than, for example, a hood or a boiling kettle, which is very important for everyday comfort.
What to do with condensate
Condensate can have a destructive effect not only on the heat exchanger, but also on the inner surface of the chimney pipe. Therefore, when replacing the convection boiler on the condensing will have to redo the chimney, which is performed from special materials. Modern technologies allow you to significantly speed up and reduce the process. For example, a flexible sleeve is lowered into the chimney, which is then under the action of hot air fills all the space and hardened.
Against the use of such equipment sometimes put forward an argument that it is poorly compatible with heating radiator systems. In fact, it is not. It works efficiently at a coolant temperature below 55 ° C.
Even in radiator systems, it is far from always having to heat the coolant. When the cool autumn day outside the window and the first frosts, the coolant can be cooled to 55 ° C. It is better to warm it in the frost to 90 ° C, but condensation in this case will not be possible. Even under these conditions, condensation technique is more effective than traditional by 1-3%.
The amount of drop-down moisture is calculated by the formula of 0.14 kg per 1 kW / h. Thus, the device with a power of 24 kW produces approximately 40 liters at low temperature. To drain moisture to the sewer, containing chemically active components, it will be necessary to dilute it with water. The perfect ratio is 25: 1, but also 10: 1 is acceptable. If a septic tank or power is high, neutralization of the resulting solution is necessary. For this, the capacity with marble crumb is used with a capacity of 5 to 40 kg. Menuing marble crumb usually have once a few months. Devices are two species: with a pump that creates pressure to raise the solution into the sewage system, and without a pump. The filler is changed only manually.
Safety Installation and Operation
In addition to the process of choosing a gas boiler for heating a private house, conditions should be provided for its safe operation.How to equip Place Installation
The installation site is regulated by the rules and rules. The boiler will not work in the house base or Dark Chulana, because, according to the same standards, natural lighting and a window with a window with an area of at least 0.5 m2 is required. According to fire standards, it is necessary for a separate room with a total area of at least 6 m2. The ceiling height should be no less than 2.5 m. The distance between the side wall of the housing and the wall should be at least 20 cm. It is required, first of all, for convenience when servicing.
It is not allowed to make a doorway with a width of less than 80 cm. The device to ensure its effective ventilation is installed opposite the input loop at a short distance (as a rule, no more than 2-3 m).
The ceiling should be seen non-flammable material. These may be asbestos sheets or plaster based on gypsum mixtures.
The wall-mounted device is hanging on a solid and deaf wall without windows and doors. A robust wall is needed, because the weight of the equipment is at least several tens of kilograms. If the design is made of foam concrete, it is better to choose the corresponding dowels for fasteners (for example, for cellular concrete). In the event that the thickness of the carrier wall is insufficient, you can recommend an anchor fastener or through fastening. And when the inner partitions are mounted from drywall, it is better not to risk and choose a model for floor mounting.
For the atmospheric burner, you need to provide ventilation holes. When using it, special ventilation openings are needed. Their cross-sectional area should be no less than 50 cm2 for an instrument with a capacity of 23 kW and at least 100 cm2 with a capacity of 35-50 kW.
For floor models you need a non-combustible base. It can be a concrete site or a podium from refractory plates. The podium is more convenient, since when it is used in the air intake, less dust falls. In this case, the device is set to the distance at least 100 mm from the wall.
Can I install in the kitchen
The kitchen needs a powerful extract. The case is better to hang as far as possible from the plate, especially if it is a model with an atmospheric burner. It consumes air directly from the room and it is desirable that the fat and soot harmful to the technique will not fall into it.Is it allowed to embed the boiler
It is forbidden to embed heating equipment in furniture headsets. They cannot be decorated with panels and shields from combustible materials. To finally figure out how to choose a gas boiler for home, you need to decide on its appearance. He must become an organic part of the interior. Manufacturers pay a lot of attention to this aspect. There are models with a front panel made of shock-resistant glass of white or black.
