When choosing heating equipment for hot water and heating have to take into account many factors. Which option is the best, what criteria is most important? On the solution of the puzzles you have to think the owners of private houses and apartments. Before you choose a gas boiler in the shop, will have to weigh the pros and cons. Otherwise, you can take not the optimal model.
The basic nuances of choosing a gas boiler
or the Lack of constant interruptions of Central heating and hot water are forcing the owners of villas and apartments to create their own Autonomous system. Their main element is the boiler, which is due to the burning fuel heats the heat transfer medium for heating and water for domestic use.
The choice in favor of gas equipment due to the efficiency of the fuel gas. All other options burning fuel cost more or give less in times of heat. Plus modern heaters of this type does not require constant supervision. Connected the unit to the main pipe or cylinder, and it runs smoothly until there is something to burn.
However, the gas boiler was functioning properly and optimally, you need to choose wisely when buying and regularly maintained after the connection. There are many different functionality and specific modules within models of this equipment. To purchase the heating unit on gas should be approached thoughtfully.
Criteria for the selection of the gas boiler a lot, but the main ones are:
- Issued by the device capacity.
- Space arrangement (the number of circuits, enclosure type and material of the heat exchanger).
- The place for installation.
- The presence of automation systems for safe operation.
All these issues are closely linked. The lack of space for a large Assembly or a desire to mount in the kitchen the device with an aesthetic appearance forced to choose a wall mounted model less power than the outdoor version. And the need for heating of hot water for the sink and shower makes the search for a boiler with two circuits.
When choosing a heater, remember that it needs repair if the workshop for the servicing of the chosen model is not around, you should look for another optionHow to choose a gas heater for heating and hot water
Modern heating equipment has a stylish appearance, filled with all sorts of sensors and can operate in several modes. However, promoted or widely advertised gas boiler does not mean – the good and the best. To focus should be not so much on design as on functionality.
Every gas boiler has inside the body of the burner and the combustion chamber with heat exchanger, but there are models with the circulation pump and other modules
First, the gas burner is ignited using an electronic system or a piezoelectric element. Then as a result of its combustion in the furnace by the heat exchanger heats the water that goes into the circuit of the heating system. Work classical single-loop model. For hot water it is necessary to choose turbofan installation or have a boiler.
Criteria # 1: Material and design teploobmennika the choice of the internal heat exchanger should be approached with special attention. Inside it is moving water, and outside influences powerful enough and high-temperature flow of thermal energy. On the one hand the material of manufacture must be very strong, and with another heat-conducting. The more it will transfer heat generated in the combustion gas to the coolant, the higher the efficiency of the installation.
Manufacturers equip boilers with heat exchangers of:
- stainless steel;
Due to the lack of susceptibility to corrosion from contact with water iron is the most durable. But he has quite a lot of weight. And if misused it can burst at the border between areas with very different temperatures. To avoid this will often flush it out.
Steel heat exchanger is the most common. It is cheaper than iron and copper analogues. Plus the metal has good ductility, which reduces the possibility of cracking. However, the steel in the heating circuit quickly corrodes.
Copper is more resistant to corrosion processes and has the best performance on heat transfer. Heat exchanger made of it has low weight and compact size. But is this option a lot of money.
In the channel No. 1 petermannia heat exchanger heats water for heating and channel 2 for hot water
Internal design of the heat exchange coil may be conventional and barmalini. The first involves connecting only one of the water circulation circuit, and the second two. Combi boilers are equipped with a pair of conventional heat exchangers or one bittermann. The second option is cheaper.
Criteria # 2: Type of housing – wall or napolnyaetsya boilers are installed on the floor or hung on the wall. Models of the first type are called outdoor and are characterized by large dimensions. Often they have cast iron or steel heat exchangers. These variants have the best performance to price ratio equipment/power than a wall-mounted counterparts.
The main disadvantage of outdoor boilers – a lot of weight. But if you need a powerful unit, without floor-mounted equipment is not enough. Hinged modification of outdoor power concede much. The choice here depends on your needs. For a private home to the large squaring requires powerful model, and for a city apartment it will be enough more compact and less powerful device.
Wall-mounted gas boiler features easy and low power, which for a small cottage in the vast majority of cases is more than enough
Unlike outdoor models, many of which can function without electricity, almost all mounted boilers are energy-dependent. Latest efficient, comfortable in use and pleasing to the expanded possibilities in terms of settings. But during a power outage sense from them a zero, if the accident is not the mains together with the light lost and heat.
For a country house it is best to take the nonvolatile outdoor boiler with mechanical control. There are no programmable thermostats and displays, but the heat it will generate, even in the complete shutdown of the cottage from the power supply. And the life of installation on the floor of the equipment is higher than that of the wall of a competitor.
Criteria # 3: Number of contours For the organization as a dwelling purely heating the best option of gas boiler – single-circuit. The same applies to a situation when only required the heater to supply hot water to the sink faucet. If the heating unit on gas it is planned to connect the pipes of the heating system and/or floor heating and domestic hot water, it must have two or more contours.
It is also possible with the connection of the boiler indirect heating. In the case of single-boiler is a drain pipe in a container of heated water. Technically such schemes are allowed, but only the heat exchanger when this will work with increased load.
Water for domestic hot water and heating can be heated in two separate single-circuit boilers or one two cooling circuits
Most dual-circuit units hot water for use at home heat flow way, and it's not too economical. It is better to install a remote boilery tank or choose a gas boiler with integrated water heater is of large volume. Both options will allow you to heat up one cubic meter of water and to maintain its high temperature for a long time.
Heaters with single contour are ideal for apartments, villas with non-residence and cottages, where the family lives in two or three people. For private homes in several floors, with a heated swimming pool or floor heating system is best to choose a Combi boiler on gas.
Criteria # 4: combustion Chamber type ignition and burner To maintain combustion of gas in boiler-needed oxygen. Into the furnace he can get out of the room or from the street. In the first case, the heater equipped with atmospheric burner natural flow of air and the second closed with the forced discharge thereof.
Accordingly there are two kinds of combustion chambers:
- Open – oxygen for maintaining the flame is drawn directly from the room with the heating equipment.
- Closed – combustion gas is sucked into the furnace from the street by a coaxial chimney or additional ventilation pipe.
In order to properly determine which gas boiler is better – with the closed chamber and the turbo-burner or open fire chamber and atmospheric burner, you need to clearly understand that the first option would require the device of the chimney in height five or six meters to ensure the natural draft. However, not all will be able to get such a high pipe on the roof.
In open cell air flow and the removal of combustible gases occurs due to the natural draught, and in a closed these processes occur due to the built-in fan
For heating of apartments in urban high-rise buildings it is better to buy the boiler on the gas with the blower and coaxial chimney. It has a higher efficiency and easier to install. But it is volatile, fan no voltage in the mains will not work. So not to be left at some point without heat should take care of the UPS or backup generator.
Heater open chamber it is recommended to install outside residential premises. Best for this purpose, suitable extension or boiler in the basement. This requires additional attention to be paid to the quality of ventilation in this room. In some cases it will even make compulsory, otherwise oxygen for efficient combustion of natural gas may not be enough.
On the one hand the closed version has a higher efficiency and does not burn oxygen in the room, but such boilers are more expensive and dependent on electricity. Without the latter will cease to operate and gas heater with electric ignition. If the uninterrupted power supply has problems, it is better to choose equipment with piezo ignition, that electricity is not required by definition.
Criteria # 5: Automation, adjustment and diagnostics to simplify your life, when choosing a gas boiler should be special attention paid his “electronic stuffing”. Manufacturers offer many additional options, which greatly simplify the operation of heating equipment into Gaza.
The remote control sensor helps to monitor the temperature in the rooms and to regulate the work of gas boiler, choosing the most optimal mode
The power adjustment may be:
- smooth with flame modulation.
The easiest and cheapest option – one-step with one button "on/off". The boiler capacity in this case is actually not regulated. Burner it either works or off. Models with two-stage adjustment suggest the presence of a couple of working regime with different capacity.
The best gas boilers from this point of view are considered to be aggregates with the modulator which allows you to smoothly adjust the intensity of fuel combustion. Automation depending on the water flow and set the master temperature includes the desired number of burners and adjusts the height of their flames.
To ensure the safety of the heaters are equipped with:
- the pressure sensors in the gas pipeline, the surge tank and the circuits with the pumped water;
- tracking the attenuation of the flame sensors;
- the system is self-locking in various emergency situations (fires, smoke, power outages);
- the pressure relief valves;
- a water filters;
- thermostats overheating.
All this automation allows you to protect the heating equipment from damage in case of emergency situations, as well as to maximize efficiency.
The presence of smart automation not only helps to maintain a comfortable temperature in the rooms, but also reduce gas consumption
You can adjust the boiler so that it in the absence of people in the building he worked in the minimum cost mode, and for half an hour before the arrival of the hosts raised the temperature of the room air to a more comfortable performance.
Which power should be boiler Technical documentation for gas heater must contain information about the nominal power. Often the manufacturer specifies there and square the room that this equipment is able to heat. But all this is rather arbitrary, without competent heat engineering calculations specific home to select a gas boiler is not worth it.
Calculation of required power is subject to the squaring of the building configuration and the type of heating systems, climatic zones and many other factors of Advice about 1 kW per 10 m2 cottage is a very average performance. They rarely reflect reality.
Experienced heating engineers calculations should take into account:
- the square and the cubic capacity of each room;
- the climatic conditions of the region;
- the quality of insulation of external walls;
- the size and number of Windows and type of glass in them;
- balconies and exterior doors;
- characteristics of the heating system, etc.
In addition, it takes into account the fuel quality and pressure of gas in the pipeline. Separately calculated for the domestic hot water system. And then both figures are added together and increased by 15-20% reserve to the boiler without problems coped with a constant and peak load. published
P. S. And remember, only by changing their consumption — together we change the world! ©