Household gas boilers are most often used in private homes and apartments, although the latter usually have centralized heating. perhaps not the most efficient. Boiler installation also makes sense in cottages, cottages, bathhouses and other similar facilities that need heating.
For apartments, a boiler with these parameters will be suitable:
- 2 circuits,
- closed combustion chamber,
- coaxial chimney,
- convection heating,
- electronic control,
- wall mounting,
- Power range from 10 to 30 kW.
For a private home, you can choose a more cumbersome, but practical and not as expensive option:
- 1 indirect water heater,
- open firebox,
- vertical chimney,
- condensation heating,
- electronic control,
- floor installation,
- power from 20 to 50 kW.
The power of the thermal equipment. the first thing you need to determine before buying. It is calculated through the heating area, taking into account the climate zone.
At the beginning, with a standard ceiling height of up to 3 meters you can do simple calculations: multiply the area of the house by the factor for your region, and divide the total by 10. As a result, you will get an approximate boiler output in kW.
From the way of installation of the boiler depends not only on the organization of space, but also the safety of gas equipment. Wall mounting saves space, but the compactness of the model entails a number of technical constraints. Burner, exchanger, pump and control electronics will be too close to each other, which creates temperature stress and complicates maintenance. Compact wall mounted models have capacity limitations. they are more suitable for apartments than for a private home.
Ideal boilers. a guide for your home or property.
Floor standing boilers are usually installed in separate rooms, so their dimensions as well as heat output are not limited by anything but common sense.
How to choose a gas boiler for the house: consider all characteristics
In the presence of gas communications the question of individual heating can be solved very easily. But there is another problem to make it as efficient as possible. Otherwise, the cold winter will be hot from the utility bills, but not from the hot radiators. Improperly selected or installed boiler will only consume gas without heating the premises properly. This is a common mistake, because of which the owners believe that the equipment is inefficient, although the reason may lie in its inconsistency with the heating system. How to choose a gas boiler for the house, so that you do not have to overpay later? Let’s consider all the nuances.
How to choose a gas boiler for heating a private house / apartment
Gas still leads among the various types of fuel, thanks to its low cost, so gas boilers are in great demand among consumers. However, the organization of heating in a detached house or in an apartment building is quite different, and before you choose a gas boiler correctly, you need to understand these differences.
Boiler output can be calculated using the proven formula 1kW per 10 square meters of living space. However, it is necessary to provide additional power reserve, if your home loses heat through:
For each of these cases there is a certain principle of calculating the coefficient of heat loss, which you can learn by taking advantage of advice from our experts.
How to choose a gas boiler for a private home: step-by-step instructions
Not all private homes are connected to the heating and hot water system. Many homeowners have to deal with this issue on their own. And the best option. a good gas boiler, which will provide you with heat and hot water. How to choose the right equipment?
Boiler. a relatively simple device for heating water by burning fuel. in the case of gas boiler is gas. A gas boiler is a burner, a heat exchanger, a pump that circulates water, a vent for the products of combustion, and a control panel. Externally, the gas boiler is a rectangular housing the size of a small refrigerator.
How to choose a gas boiler for a private home and what to pay special attention to when choosing? We suggest you use a simple step-by-step instruction that will allow you to decide on the general requirements for this equipment.
Decide on the expectations of the gas boiler installation: Step 1
The first question to answer when choosing a gas boiler: “What do you need it for??”. Typically, gas boilers are purchased either to solve the problem of heating, or both for heating and water heating. If you are only interested in heating, look in the direction of single-circuit boilers. In such boilers, cold water comes in through one pipe, heats and comes out through another. These are very simple devices, inexpensive to buy, and in operation, because they consume fuel economically.
If you want both heating and hot water at the same time, you will need a dual circuit boiler with two systems. for heating and for hot water. Many such models are equipped with two heat exchangers, although there are units with one heat exchanger.
Make a list of your home’s features: Step 2
In order to determine which gas boiler is better, you need to know exactly the characteristics of the room. And the most important of them is the area of the house. The size of the room depends on the required capacity of the gas boiler.
Approximately calculate the required power is quite simple. for heating 10 square meters you need 1 kW of energy. However, if you stick to this formula, the boiler will always have to work at maximum capacity, and this can shorten its life. Therefore, you should add about 20% to the obtained figure. In other words, for example, the boiler with the power of 10 KW, not 8, is needed to heat a small cottage with the area of 80 square meters. For more precise calculations we take into account such factors as the height of the ceilings, size of windows, additional insulation, specific features of the climate and even the location of the house. for example, heating a house on a windy hill requires a more powerful boiler than heating a house built in a quiet valley.
Assess the budget: step 3
Most significantly at. and the same model, but a capacity of 36 kW. already at 90 thousand. On average
Choose a brand: step 4
It is definitely not worth saving on the brand. Of course, you can always find a cheap “unnamed” gas boiler, but this approach involves a lot of risk. Choosing a unit, give preference to the well-known and time-proven brands. Such brands as Viessmann, Buderus, Vaillant, Ferroli, Western, Protherm, Ariston, Baxi and Mora are definitely trustworthy.
Keep in mind that a well-known brand. it is not only a guarantee of quality, but also a wide network of service centers, no problems with repair and spare parts, economy and environmental friendliness (because large companies use modern developments to reduce fuel consumption) and a wide range of models for all needs.
Determine which type of gas boiler is best for your home: step 5
Now that you have decided on the basic characteristics, let’s move on to a more detailed selection of the boiler. Consider the main points to consider.
Heat Exchanger Material. They are most often made of copper, stainless steel or cast iron. Copper heat exchangers are the most expensive, but they have a lot of undeniable advantages: they are durable, resistant to corrosion, lightweight and still provide excellent heat transfer. Steel heat exchangers are the most common. The reason for such popularity is the low cost and resistance to mechanical damage. But there is a disadvantage. the risk of corrosion. Cast iron is characterized by a very good heat transfer and, subject to proper operation, durability. Its main disadvantage. great weight.
Mounting type. For heating and water supply of large houses (from 250-300 square meters) are better suited floor boilers. they are larger and more massive, but also more powerful. For small cottages and country houses the compact wall hung boilers are also suitable.
Type of combustion chamber. They can be open and closed. Boilers with open chambers take air to maintain combustion directly from the room, and for the removal of combustion products it is required to build a chimney. Such boilers can be installed only in non-residential, specially equipped rooms. Boilers with closed chambers can be installed anywhere, they need only a horizontal chimney with an outlet to the street. But you have to pay for convenience. such boiler models are more expensive than gas boilers with an open combustion chamber.
Study the boiler‘s operational characteristics: step 6
The boiler must be not only efficient, but also easy to use and safe. To assess these criteria, pay attention to the electronic component of the chosen model.
Modern gas boilers are equipped with a mass of additional options that provide comfort and safety of the unit. For example, ask about the boiler power control system. The simplest models have only two modes. “on” and “off”. Buying such a boiler, you can not select and regulate the modes of operation. And it is not always convenient. and definitely not economical. Boilers that can operate in several modes are much more comfortable to use and save fuel. The best gas boilers are equipped with a smooth regulation system, as well as an automatic setting system. Some models can turn on and off on a timer. for example, during the day when all the residents are at work, such a boiler will maintain a minimum temperature, and in the evening will turn on full power.
Safety is another important issue. Modern gas boilers from reputable manufacturers are equipped with thermostats that turn off the unit when overheated, pressure relief valves, locking system that activates in case of fire or power outage.
Is it possible to decide for yourself which gas boiler to choose for heating a private home? Theoretically. yes, but there are so many subtleties in this matter that it will be more reliable to entrust it to professionals. Large boiler stores offer not only gas boilers, but also a whole range of services for selection, installation, configuration and service maintenance.
Parmon Anna Sergeevna Responsible editor
Gas boiler can be connected at any stage. both during repair or construction, and after the completion of all finishing works. Nevertheless, it is better to solve the issue with the heating through the boiler at the design stage, since some models require a separate room.
Electric boilers: how to choose the best electric boiler for heating a private home?
How to choose the right gas boiler and take into account all the nuances
When choosing a gas boiler, you have to take into account a lot of characteristics reliability, safety, capacity, size, method of installation. And the maximum functionality should be combined with an acceptable price. To help you with this, we decided to tell you about how to choose a gas boiler and not to forget any important details.
- Which gas boiler to choose?
- Single-circuit or double-circuit gas boiler?
- Turbid boiler or chimney boiler?
- Floor-type or wall-mounted?
- Gas condensing boiler pros and cons
- Calculation of the gas boiler capacity
- Additional features of the gas boiler
- To sum up
Variety of boiler equipment on the efficiency of fuel combustion
The energy efficiency of boiler equipment determines the amount of money you will pay for gas consumption at the end of the month, so the choice of one or another type of unit should be taken with the utmost care.
According to the parameter “boiler type” boilers can be divided into types, which will directly affect the level of energy efficiency:
In condensing units, the heat exchanger is heated by the combustion of gas and the transfer of heat from the flue gases and heat from the condensation of steam in the flue gases. Such heat exchange is possible due to the special design of the heat exchanger.
In a turbine gas boiler there is no gas condensation, so the energy for heating comes only from the combustion of gas masses.
In the convection gas boiler processes of heat transfer are similar to turbine, the difference is the lack of a turbine, which improves the efficiency of equipment.
Parapet units on the principle of heating similar to the convection. The design allows to operate them as a radiator.
Before you choose a gas boiler, look closely at the devices of condensing heating. they are more energy efficient (up to 20%), compared to other types of models.
What gas boiler to choose for heating a private house?
The most optimal and economical source of heating for a country house is still a gas boiler.
In our market there are a huge number of manufacturers of these products. Bosch, Buderus, Viessmann, Vaillant, Baxi, Navien, etc.д.
Let us help you to understand this matter in order to avoid irreparable mistakes when buying.
Nowadays, the project of power supply of the building does not cause any questions for anyone. It is taken for granted.
Hence the problems with the right choice of capacity of the gas boiler, and then with its operation.
The most popular way out of them is to divide the total area of the house by 10 m2. The result is allegedly the calculated value.
The thickness and material of the walls, dimensions, number and type of windows, doors, loft availability, etc. are not taken into account.п.
If you want to know the average without the project capacity, use at least online calculators. Choose the ones that require the maximum number of parameters.
But nevertheless for comfortable and quiet life initially put in your expenses the separate sum in the project of heat supply. In it a scheme of the whole heating should be developed and heat losses of the house should be calculated.
When people first see a boiler nameplate capacity of 24kW or more, it causes them to be puzzled.
Do not confuse the electrical and thermal capacity of heaters. The gas boiler consumes no more than 150-200 Watt/hour from the socket in the worst case.
So it is enough to power it during power outage and the usual batteries with an inverter or a so-called UPS.
We are not talking about any kilowatts here.
And consequently, to take a gas boiler with a reserve, economically unprofitable. This is not always true.
First of all it is a problem with “stupid” floor standing and outdated wall mounted boilers.
This is what a 20kW and a 30kW appliance would look like conventionally.
On the vertical line we have the gas flow rate, on the horizontal line. the operating time. Above are drawn two modes, the so-called clocking. Bottom. the mode of comfortable operation with constant power in frosty weather.
Typically, beat cycle can be observed in the off-season, when there is no heavy frost and there is no need to warm up the system for a long time.
In this situation, the boiler starts at maximum, heats up water quickly and shuts down. Then pump distributes coolant through the system, the temperature drops, the burners are started again.
In this mode the boiler works with both 20 kW and 30 kW. What is the difference?
And the difference is that the first will consume gas in the interval of start-up conditionally 2m3, and the second 3m3. When the boiler stalls, it does not have time to evaluate anything and reach the optimum output.
It starts at maximum and stops at maximum. But all this applies to old, “dumb” models.
In modern wall hung appliances with modulating burners (1:10) and smart electronics, the boiler is arranged so that if the automation initially sees the overheating of the coolant, the next switching on will occur at a lower power, or you can reduce it yourself.
The only problem is when the minimum capacity of the boiler is not so minimum.
So check the manual and ask the seller if the gas boiler has a modulation function or not. And the more frequent the step of regulation, the better.
90% of consumers never use weather dependent automation or GSM modules in their lives. It is not worth overpaying for them.
This is how most solve the perennial problem with clocking.
This is not the case at all. The final power is only affected by the heat loss of the building.
WHICH IS THE BEST GAS BOILER IN 2020, Looking into the best boiler for uk homes
When the temperature reaches the set values, the amount of heat from the boiler will be the same. It does not matter how much water will be in the system. 10 liters or 100 liters.
Which wall mounted gas boiler is better. Korean or European? It is between them most often there is a struggle in this segment.
All turbine wall mounted boilers operate approximately the same. Yes, the filling is different, but it does not affect the ECONOMY.
The efficiency of Korean and European models is the same. It is necessary to look at another parameter, namely. the availability of service in your city for maintenance and repair of specific brand.
Based on this factor, it is worth making a choice in one direction or another. Remember the simple rule, the farther you live from the service, the easier the units are to choose.
In fact, there is nothing wrong here, just sellers should be honest with you initially, rather than cramming in a purely European quality.
How to Choose the Most Efficient Boiler | This Old House
How not to get caught on it and check everything yourself? Elementary.
You type in the full name of the model in Google and add two words. “Certificate of Conformity”. You download it and carefully study.
Every product that is imported into the territory of the CIS countries must have a certificate. In the column “Manufacturer” is precisely where the boiler was actually manufactured. Here are two certificates for easy comparison.
See the specific brand in the column. “Products”.
This concerns not only the assembly, but also the components. Few manufacturers save only on labor at the expense of the Chinese.
So you should not believe the sellers that the boiler was only screwdriver assembled in China, and all of its innards are European. Although again, in today’s world, not always the Chinese components are bad.
This is primarily a question of the seller’s honesty.
Two-circuit boilers are needed only for hot water supply (DHW). heating separately hot water. Single-circuit device perfectly copes both with a warm floor, and with the batteries.
All it does is just warm water. What you have in this case, the heating system does not really care.
The main thing is to properly design and calculate. In general, for a normal hot water boiler purchase power less than 24 kW is not recommended.
In the sale now there is a huge range of boilers from foreign and domestic manufacturers. In this case, to understand which boiler is better, not so easy. In order to navigate in the variety of proposals and screen out unsuitable options, you should choose:
Which boiler to choose for the house, depends on what energy sources are the most affordable and profitable for you. Depending on the type of fuel are distinguished:
Before you choose a boiler for heating a private home, decide where you will place it. Boiler can be placed on the wall (wall mounted) or on the floor (floor standing). If you only need to heat your home, you should opt for a single-circuit boiler. If you want to provide your home with both heat and hot water, you will need a two-circuit.
The best gas boiler for home heating from VAILLANT Germany 2018. 2019
Heating condensing boiler with integrated domestic hot water preparation for houses up to 240 square metres²
Low cost condensing boiler made in Europe
The energy efficient technology reduces gas consumption by 15% compared to a traditional turbine boiler
Modulating burner, power range from 35% to 100%
Reliable and durable high quality stainless steel heat exchanger
Energy-saving, frequency-controlled pump
Hot Start System. Hot water in 3 seconds. After the start of the water draw
Maximum working pressure in the heating circuit 3 bar, in the DHW circuit up to 10 bar
Possibility of remote monitoring and control via smartphone or computer