In fact, it is quite simple to calculate the average gas consumption for heating a house with a functioning heating system. It is enough to record the gas meter readings on the first and last day of the month. But at the stage of designing a cottage or dacha, it is also necessary to make these calculations, at least in order to select the energy carrier, and then the heating equipment. In this article we will show how to correctly determine the average gas consumption for heating a private house for a given area.

Payment procedure

The main indicator on which the calculation result depends is the power consumption for heating. In accordance with the standards, it is calculated for each room at the street temperature in winter during the coldest five-day period. Such calculations are quite complex and are carried out with the aim of correctly selecting boiler equipment.

In reality, thermal energy is consumed on average by half less than calculated. This is understandable, because during the heating season the outside air temperature fluctuates from above zero to the lowest, and the gas consumption rate also changes. Taking this point into account, we will follow the generally accepted path of determining the approximate amount of heat for a building. That is, instead of 100 W of energy required for each square meter of area, let’s take the real average value - 50 W / m2 for 1 hour.

Accordingly, a house with an area of ​​100 m2 will consume 5000 W / h or 5 kW / h. To calculate the volumetric amount of fuel for a given area, the following formula is used to calculate gas costs for heating:

• L = Q / (qH x 0.92), where:
• L – volumetric fuel consumption for 1 hour, m3;
• Q – required thermal power for heating, kW;
• qН – lower heating value of fuel, for natural gas equals 10.175 kW/m3;
• 0.92 – efficiency of a boiler plant burning fuel.

Thus, the hourly calculation of gas consumption for heating a house with an area of ​​100 m2 looks like this:

5 / (10.175 x 0.92) = 0.53 m3/h natural gas.

Then everything is simple: per day the volume of fuel will be 0.53 x 24 = 12.7 m3, and per month - 12.7 x 30 = 381 m3. Those homeowners who find it convenient to determine all values ​​relative to 1 m2 of area, so that they can subsequently calculate the consumption for any building, are asked to divide the resulting value by the square footage of the building. Then it turns out that per month the gas consumption per 1 m2 is 3.81 m3.

Knowing all the values, you can easily determine the volume of fuel required to heat a house of a given quadrature per year, that is, during the heating season. To do this, it is enough to find out the number of days in the heating season and multiply the daily consumption of natural gas by this value.

It should be noted that with this algorithm, the accuracy of the calculations is not too high and is applicable at the stage of economic calculation of the cost of heating and comparison with heating with other coolants. By the way, the above formula is suitable for determining the mass or volumetric flow rate of other types of fuel, both solid and liquid.

Liquefied gas consumption

Many modern boilers are designed in such a way that they can burn liquefied gas even without replacing the burner. Therefore, of interest are not only the costs of consuming methane gas, but also propane-butane supplied in cylinders. Finding out these values ​​will be useful for those homeowners who plan to organize autonomous gas heating due to the temporary lack of mains fuel.

So, to calculate the amount of gas for a building with an area of ​​100 m2 that burns in 1 hour, you need to substitute the calorific value of liquefied gas into the previous formula and recalculate it again. At the same time, do not forget that the consumption of natural gas is calculated in liters and m3, and liquefied gas - in kilograms, which then need to be converted into liters. So, taking into account the calorific value of gas in the amount of 12.8 kW / kg (46 MJ / kg), we obtain:

5 / (12.8 x 0.92) = 0.42 kg / h of liquefied gas.

1 liter of propane-butane weighs 0.54 kg, which means that heating a house with a gas boiler in 1 hour will require 0.42 / 0.54 = 0.78 liters of liquefied gas. Per day - this is 18.7 liters, per month - 561 liters. Taking into account that a regular cylinder contains about 42 liters of fuel, in a month to heat a building of 100 m2 you will have to use 561 / 42 = 14 cylinders, this is quite a lot and will not be cheap.

As a summary, let us present the results according to which the approximate monthly consumption of liquefied gas for heating a house is:

• 100 m2 – 561 l;
• 150 m2 – 841.5 l;
• 200 m2 – 1122 l;
• 250 m2 – 1402.5 l.

How to reduce gas consumption

Measures to reduce fuel consumption for heating one square meter of space, and therefore the entire cottage, are well known. This includes replacing old windows in apartments, insulating external walls, floors and roofs (especially for reinforced concrete and brick houses), as well as using various methods of automatically regulating air temperature.

But there are other ways to save money that affect gas consumption in boilers:

• use of an underfloor heating system: the coolant is heated to a maximum of 50 ºС instead of 90 ºС with a radiator system, which provides considerable fuel savings;
• arrangement of an organized heated air flow: the lion's share of the heat (about 60%) produced by the boiler goes to heating the cold air that randomly penetrates the building from the outside;
• programmed automatic decrease in air temperature at a certain time of the day: there is no point in warming up the entire volume of the room when there is no one in it.

Conclusion

As can be seen from the examples given, performing calculations to determine the gas consumption used to heat a house or apartment is not a very difficult task. You need a little personal time, and also some care when introducing various units of measurement into the formula. The calculation results will certainly help you in the future when selecting a heat generator and estimating financial costs.

When designing a gas heating system, all factors affecting gas consumption are taken into account: the size of the housing, the number of floors, insulation of the main structures, power and how many people live in the house. Heating a private home with gas is beneficial from an economic point of view for several reasons.

Benefits of use

Firstly, it is characterized by high efficiency of the combustion process due to its low sulfur content. This also allows you to save resources for cleaning the boiler. Secondly, it is easy to reduce heat losses and gas consumption with the help of good thermal insulation. Thirdly, gas is also an environmentally friendly material, since when it is burned, a very small amount of harmful substances is released into the atmosphere.

When using gas as a fuel for heating, the boiler walls do not suffer from corrosion, which increases the service life of the equipment. It is convenient to use liquefied gas: it has better quality and is delivered in cylinders to places where there are no highways, making life easier for thousands of people.

Complexity and cost features

Gas consumption for heating a house is directly proportional to the living area of ​​the room. You can calculate the consumption in kW/hours by multiplying the boiler power by the number of hours/day and day/month.

However, this mode is practically not used for everyday life. The real indicator for calculating gas consumption is the average monthly kW/hour. To do this, the maximum monthly consumption for heating a house is divided in half. If this is a residential building, then the calculation is made based on the length of the heating season.

Algorithm

Data for calculating boiler power are based on the ratio of 1 kW/h per room of 10 m². Thus, to heat a house with an area of ​​100 m², you will need to divide it by 10: i.e. the required power will be 10 kW/h.
How much gas is consumed for a different size house is calculated according to the same principle, i.e. the area is divided by 10. For example, for an area of ​​200 m2, the calculation will look like this: 200 m2/10, i.e. 20 kW/hour will be spent on heating this room.

Adjustment for days

Monthly gas consumption is calculated by multiplying the daily requirement of a house of 100 m2 by the number of days in a month: 10 kW/h * 24 hours * 30 days (total - 7200 kW). Since the system usually operates in medium mode, the maximum flow rate is divided in half, and the result is 3600 kW.

Adjustment for the season

If the duration of the heating season is 7 months, then the calculation of gas costs is obtained by multiplying 3600 kW by 7. i.e. heating a private house with an area of ​​100 m² will cost 25,200 kW. Heating a house of 200 m2 will require 50,400 kW, respectively.

If the heating season is shorter or longer than 7 months, then gas consumption is calculated accordingly by multiplying by the period required by the user.

Knowing the tariff for 1 kW/hour, it is very easy to calculate the monetary equivalent of consumption. The cost of 1 kW/hour may vary depending on the region.

Nuances and additional factors

There are special programs for calculating fuel consumption that will greatly facilitate the work. For apartment buildings that are connected to the main gas supply, consumption standards are established.

Despite the available methods, for a more accurate result it is still recommended to contact specialists. After all, calculating the need for a gas boiler takes into account the use of fuel only for heating the house.

But you also need to remember about the presence of a gas stove and a water heating system, which will increase your costs. The number of people living in a house or apartment is also important for the consumption indicator. All these factors will be taken into account by specialists.

In addition, our experts will help you minimize gas consumption through the use of special technologies.

Features of autonomy

If there is no gas main near a residential or country house, then an autonomous heating system that runs on a mixture of propane and butane is an excellent solution.

The cost of purchasing and installing autonomous heating equipment that uses a mixture of propane and butane as fuel is lower than the cost of connecting to a central gas main.

pros

Such a system reduces the risk of emergency shutdown of pipelines and the threat of a sudden drop in pressure. Autonomous heating has reservoirs that maintain the ability to consume gas for heating for some time.

In the event of a power outage or fuel supply, the safety system with which all boilers are equipped blocks the solenoid valve. After gas supply is restored, you need to start it again.

Tricks for saving

Reducing gas consumption for heating can be achieved in the following ways:

• installation of an automatic control system;
• installation of gas sensors, which will also help to detect leaks in time;
• insulation of the house: sheathing of walls, roofs;
• compliance with the temperature regime in the room with cylinders not lower than 25°C;
• purchasing cylinders from a trusted supplier, since poor fuel quality also reduces efficiency.

These measures make it possible to reduce gas consumption by up to 40%, which makes it possible to use 1 cylinder for 3-4 days.

When arranging a heating system and choosing an energy source, it is important to find out the future gas consumption for heating a house of 150 m2 or other area. Indeed, in recent years, a clear trend towards an increase in prices for natural gas has been established; the last increase in price by approximately 8.5% occurred recently, on July 1, 2016. This led to a direct increase in heating costs in apartments and cottages with individual heat sources using blue fuel. That is why developers and homeowners who are just choosing a gas boiler should calculate heating costs in advance.

Initial data for calculations

To perform a preliminary calculation, you need to find out the following parameters:

• calorific value (calorific value) of natural gas supplied in your area;
• Efficiency of the boiler that is planned to be installed in a house or apartment.

The calorific value of the fuel is taken based on the value of the lower calorific value of the main gas.

Theoretically, when burning 1 m³ of blue fuel, 9.2 kW of thermal energy is released. In practice, this value differs and, as a rule, to a lesser extent. Due to the same rise in price, some unscrupulous suppliers dilute gas with air, which is why its calorific value can decrease to 7.5-8 kW/m³.

To determine gas consumption for heating a house, it is better to find out the caloric value from the management company, and when this fails, use a reserve figure: 8 kW/m³. If they share with you information about the specific heat of combustion and give you a figure expressed in other units, kcal/h, then you can convert it to Watts by multiplying by a factor of 1.163.

Another important indicator that directly affects fuel consumption is the thermal load on the heating system, which consists of heat losses through the building structures and losses due to heating of ventilation air. The best option is to perform or order an accurate calculation of all heat losses, but in the absence of any other option, you can determine the load using enlarged methods:

1. If the ceiling height does not exceed 3 m, then the heat consumption is assumed to be 0.1 kW per 1 m² of heated area of ​​the building. Thus, for a house of 100 m2 you need about 10 kW of heat, 150 m2 - 15 kW and 200 m2 - 20 kW of heat energy.
2. Apply 40-45 W of heat per 1 m³ of heated room volume. The load is determined by multiplying this value by the volume of all heated rooms.

The efficiency of the heat generator, which affects the efficiency of fuel combustion, is indicated in its technical data sheet. If the unit has not yet been purchased, then you can take the efficiency of gas boilers of various types from the list:

• gas convectors - 86%;
• boilers with an open combustion chamber - 88%;
• heat generators with a closed chamber - 92%;
• condensing boilers - 96%.

Performing Calculations

A preliminary calculation of gas consumption for heating is made using the formula:

V = Q / (q x efficiency / 100).

• q is the caloric content of fuel, the default is 8 kW/m³;
• V is the required main gas flow rate, m³/h;
• Efficiency is the efficiency of fuel combustion by a heat source, expressed in %;
• Q is the heating load of a private house, kW.

As an example, we offer the calculation of gas consumption in a small cottage with an area of ​​150 m² with a heating load of 15 kW. It is planned that the heating task will be performed by a heating unit with a closed combustion chamber (efficiency 92%). The theoretical fuel consumption per 1 hour in the coldest period will be:

During the day, the heat generator will consume 2.04 x 24 = 48.96 m³ (rounded - 49 cubic meters) of natural gas - this is the maximum consumption on the coldest days. But during the heating season, the temperature can fluctuate between 30-40°C (depending on the region of residence), so the average daily gas consumption will be half as much, about 25 cubic meters.

Then, on average, per month a turbocharged boiler uses 25 x 30 = 750 m³ of fuel to heat a house with an area of ​​150 m², located in central Russia. Consumption for cottages of other sizes is calculated in the same way. Based on preliminary calculations, it is possible to carry out measures aimed at reducing consumption even at the construction stage: insulation, selection of more efficient equipment and the use of automatic control devices.

Autonomous heating of private houses with liquefied propane or its mixture with butane has not yet lost its relevance in the Russian Federation, although in recent years it has noticeably increased in price. It is all the more important to calculate the future consumption of this type of fuel for those homeowners who are planning such heating. The same formula is used for the calculation, only instead of the lower calorific value of natural gas, the parameter value for propane is set: 12.5 kW with 1 kg of fuel. The efficiency of heat generators when burning propane remains unchanged.

Below is an example of a calculation for the same building of 150 m², only heated with liquefied fuel. Its consumption will be:

• for 1 hour - 15 / (12.5 x 92 / 100) = 1.3 kg, per day - 31.2 kg;
• on average per day - 31.2 / 2 = 15.6 kg;
• on average per month - 15.6 x 30 = 468 kg.

When calculating the consumption of liquefied gas for heating a house, it is necessary to take into account that fuel is usually sold in volumetric measures: liters and cubic meters, and not by weight. This is how propane is measured when filling cylinders or a gas tank. This means that it is necessary to convert mass into volume, knowing that 1 liter of liquefied gas weighs about 0.53 kg. The result for the example above will be:

468 / 0.53 = 883 liters, or 0.88 m³, propane will have to be burned on average per month for a building with an area of ​​150 m².

Considering that the retail cost of liquefied gas is on average 16 rubles. for 1 liter, heating will cost a considerable amount, about 14 thousand rubles. per month for the same cottage on one and a half hundred square meters. There is reason to think about how best to insulate walls and take other measures aimed at reducing gas consumption.

Many homeowners expect to use fuel not only for heating, but also to provide hot water supply. These are additional costs, they must be calculated, plus it is important to take into account the additional load on the heating equipment.

The thermal power required for hot water supply is easy to calculate. You need to determine the required volume of water per day and use the formula:

Q DHW = cm (t 2 - t 1).

• c is the heat capacity of water, equal to 4.187 kJ/kg °C;
• t 1 — initial water temperature, °C;
• t 2 — final temperature of heated water, °C;
• m is the amount of water consumed, kg.

As a rule, economical heating occurs to a temperature of 55 °C, and this must be substituted into the formula. The initial temperature varies and lies in the range of 4-10 °C. For a day, a family of 4 people requires approximately 80-100 liters for all needs, provided that it is used sparingly. It is not necessary to convert the volume into mass measures, since in the case of water they are almost the same (1 kg = 1 l). It remains to substitute the obtained value of Q DHW into the above formula and determine the additional gas consumption for DHW.

The nominal gas consumption for heating a house of 100 m², for a month or for the entire heating period, if the system has already been installed and has been in operation for a long time, is quite simple to calculate - it will be enough to take meter readings at the beginning and end of the month throughout the year, sum them up, and then calculate arithmetic mean parameter. It’s another matter if you need to find out this data at the stage of drawing up a house project in order to select an economical and efficient energy source and appropriate heating equipment.

Therefore, the question of how to correctly determine the weighted average gas consumption for heating a building of a given area is so important. There are several options for carrying out such calculations.

The procedure for carrying out calculations for heating with network gas supply

Natural gas supplied to consumers through utility networks is today the most optimal energy carrier for organizing a heating system for private housing. This is due to the low price of fuel, the absence of the need to create reserves, and the fairly high efficiency of modern gas equipment.

Naturally, when choosing a gas boiler for heating a house, you need to focus on its power, since not only the efficiency of the entire heating system, but also energy consumption will depend on it. However, gas consumption is affected not only, and not so much by the boiler power, but by many other factors that should also be taken into account. These include the climatic conditions of the region of residence, the design features of the building itself, the area and height of the ceilings of heated rooms, the quality of insulation of building structures, the number and type of windows and other important parameters.

It should be understood that the nameplate power of the boiler shows its maximum capabilities, which, of course, must be higher than the required characteristics. For example, after carrying out calculations of the required thermal power for heating a house, the optimal model of the heating device is always selected with higher performance. For example, if as a result of calculations it is determined that the heating system requires 12 - 13 kW, then the owner will probably select a boiler with a power of about 15 - 16 kW.

All this is being said now in order to clarify: it would be erroneous to rely only on the characteristics specified in the technical documentation of the boiler when making a preliminary calculation of gas consumption for heating and planned expenses. The list of product parameters usually shows gas consumption (m³/hour), but this, again, is to achieve the power declared by the manufacturer. If we take these indicators as a basis, the total results may seem daunting!

But correctly calculating at least the approximate gas consumption is necessary not only to make sure that it is the most economical fuel, but also to determine what measures can be taken to reduce consumption, and therefore reduce regular payments for it.

The main indicator with which to start calculations is, rather, not the declared power of the heating device, which is still unlikely to be used “to its fullest,” but the necessary thermal power for high-quality heating of the house and replenishing its heat losses.

Very often, the basis for such thermal calculations is the ratio of 1 kW of thermal energy per 10 m² of heated room. This approach is, of course, very convenient for calculations, but still does not fully reflect the real conditions of a particular home and region of residence.

It is better to make a more thorough calculation, taking into account the main factors influencing the required thermal power. Doing this is quite easy if you use the technique presented on our portal.

How to independently calculate the required thermal power?

An accessible method for carrying out independent calculations is given in the portal publication dedicated to.

The value obtained as a result of the calculations will become the “starting point” for determining the average gas consumption for heating.

For further calculations, you will need a formula that takes into account the energy potential inherent in the “blue fuel”, that is, the amount of heat that is released during the combustion of one cubic meter of gas.

V = Q / (Ni × ηi)

Let's decipher the notation:

• V– the desired value, that is, gas consumption to obtain a certain amount of thermal energy, m³/hour.
• Q– required thermal power, W/h, to ensure comfortable indoor conditions.

We have already decided how to calculate it. But again there is an important point to make. As can be seen from the calculation conditions, the resulting value will be the maximum, calculated for the most unfavorable conditions of the coldest decade of the year. In reality, there will not be so many such periods during the entire heating season, and the boiler with a well-planned heating system never works constantly. And since our goal is to determine the average, and not the peak, gas consumption, it would not be a big mistake to take the average value of the generated power as 50% of the calculated one. Again, not to be confused with the rated power of the heating boiler.

• Ni – specific lower heat of combustion of gas. This is a calculated tabular value that corresponds to existing standards. So, for network gas it is taken equal to:

Pay attention to the type of gas. The G20 is most often used in household networks. But gas of the same second group, but of the G25 type, characterized by a high nitrogen content, can also be used. Naturally, its energy potential is less. If you don’t know what type is used in your network, it’s easy to check with your regional gas supply organization.

You may be interested in information on how to choose a quality

One more nuance. There is one more value in the table - Hs. This is the so-called highest value of the heat of combustion of gas. The point is that the water vapor produced during gas combustion also has latent thermal energy, and if it is used, the overall return from the fuel naturally increases. It is this principle that is applied in the new generation of boilers - condensing boilers, in which about 10% of the heat is removed by converting steam into a liquid state of aggregation. That is, this indicator can be taken as a basis when calculating for heating systems with boilers of this type.

The specific heat of combustion is indicated in joules, but for the calculation to be correct it must be converted to watts. The ratio is as follows:

1 kW = 3.6 MJ

In our case it turns out:

• ηi– boiler efficiency, that is, a value showing how efficiently in a particular model the thermal energy obtained from gas combustion is spent precisely on heating the coolant.

This is the nameplate value of the product. In modern boiler models, it can also be indicated by two values ​​- by the highest and lowest calorific value of gas, through the fraction sign: Hs / Hi, for example, 92.3 / 84%. Naturally, you can choose a value that corresponds to the actual operating conditions of the boiler. But, as a rule, for a reliable calculation, “without embellishing” the capabilities of the equipment, the value for the Hi mode should be taken.

So, all the data for the calculation is known - and you can proceed to practical calculations. Let's look at an example:

Suppose it was calculated that for efficient heating of a particular house with an area of ​​100 m², 9.4 kW of thermal energy is needed. Network gas - G20. Boiler efficiency is 0.88. It is required to determine the average gas consumption for heating.

As already mentioned, to determine the average flow rate, the required thermal power can be divided by two, that is, we take for calculations 9.4 / 2 = 4.7 kW

V = 4.7 / (9.45 × 0.88) = 0.565 m³/hour

• On average it is consumed per day - 0.565 × 24 = 13.56 m³;
• On average per month - 13.56 × 30.5 = 413.71 m³;
• The heating season in different regions may differ in duration. But, for example, let's take 7 months:

413.71 × 7 = 2896 m³

Knowing the price of one cubic meter of gas, you can roughly plan your “accounting” for the upcoming heating season.

Once again, it should be emphasized that the resulting consumption value per hour is very average. Of course, at the peak of winter frosts it will be higher, but then it will “recoup” in the autumn or spring months, during thaws or during periods of stable, normal weather for the region.

To make the task easier for the reader, we will post a calculator that will help determine the average hourly, daily and monthly consumption of natural gas. It will then be easy to calculate the total costs, taking into account the approximate length of the heating season in the region and the price level for “blue fuel”.

For a home, owners are required to know in advance how much it will cost to heat their living space during operation. Ultimately, it may be that the heating system will simply be unprofitable if the equipment is chosen incorrectly, the design is poorly designed, or the walls are poorly insulated. Therefore, it is important to correctly calculate the gas consumption for heating a house of 200 m2. From the obtained figure you can already start and start or not start designing and purchasing equipment.

We calculate the gas consumption for heating a house of 200 m2

One of the main values ​​in the calculation formula is the power of the equipment. Without it, it is impossible to determine the heating of a 200 m2 house. A boiler is selected based on the area of ​​the house, and when calculating the flow rate, they are guided by the lowest air temperature outside the window. The resulting value is divided in half, because the temperature outside is not always sub-zero. So the consumption will vary in approximately the same proportions.

Determination of boiler power

When calculating the consumption of liquefied gas for heating a house of 200 m2, the boiler power is first determined. It is assumed that for every 10 square meters of heating area, 1 kW of power is needed. Based on the fact that the value needs to be divided in half, we take half - this is 50 watts per hour per square meter. For 100 meters of area we need 5 kW of power; at 200 meters - 10 kW. This means that when choosing a heating boiler, we need to look for models with a power of 12-15 kW. It is recommended to choose equipment with a reserve. If you choose a 10 kW boiler, then it should cope with its task, but if somewhere the heat loss in the house is higher than expected, then the boiler will work at the limit of its capabilities and will not always be able to provide proper heating.

Forum natural gas consumption for heating a 200 m2 house

There is a special formula by which the calculation must be carried out:

In this formula:

1. A is the amount of gas per hour to be determined.
2. Q is the power required for heating (in our case it will be equal to 10 kW).
3. q - minimum specific heat. This parameter depends on the brand of gas used. If your gas pipeline uses G20 gas, then this value will be equal to 34.02 MJ/cubic meter. It must be converted into kilowatts using the formula: 1 MJ = 0.277(7) kWh. It will be equal to 9.45 kWh.
4. B - efficiency of our equipment. The value depends on the boiler you choose. There are models on the market with efficiency ratios of 80%, 90%, 95%, 98%. It is advisable to select a boiler with a higher efficiency. This way, the gas consumption for heating a house of 200 per m2 will be less, and the savings over the year will be significant. For at least a few years, the savings will exceed the costs of the higher cost of a high-efficiency boiler. Let's say you choose a model with 95% efficiency. However, we cannot put percentages in the formula. Therefore, we take the coefficient 0.95 and use it.

We know all the numbers. Now you just need to substitute them into the formula:

A = 10 / 9.45 * 0.95 = 1.0053 cubic meters m/hour.

This means that the average gas consumption for heating a 200 m2 house is 1 cubic meter per hour. But this is provided that you use a boiler with an efficiency of 95%, and your gas pipeline contains G20 gas. Otherwise, the values ​​in the formula need to be changed, the result will be slightly different.

Daily and monthly expenses

Now all we have to do is multiply the resulting figure by 24, and we will get the daily gas consumption under the condition of continuous operation of the equipment. Next, we multiply the value by 30 and get the monthly gas consumption. In our case, the flow rate will be 720 cubic meters. In principle, this is the real gas consumption for heating a house of 200 m2; all you have to do is find out the cost of one cubic meter for your region and calculate how much it will cost.

Calculation of liquefied gas

The above formula will also work for liquefied gas. The only difference is the different thermal conductivity of the gas itself. Therefore, here the parameter q is taken equal to 46 MJ per kilogram or 12.8 kW per kilogram. Let's leave the boiler efficiency equal to 95. Substitute the values ​​into the formula and get:

A = 10 / 12.8 * 0.95 = 0.74 kg/hour.

Liquefied gas is always counted in kilograms. The value is then converted to liters. To do this, the resulting value must be divided by 0.54. In our case, the consumption is 1.37 liters of gas per hour. Next, according to the usual scheme:

1. The daily consumption of liquefied gas will be 33 liters.
2. Monthly consumption is almost a thousand liters.

It is worth considering that a standard cylinder contains only 42 liters. This bottle lasts for about a day. To understand how many cylinders we need, simply divide the amount of gas per season by 42. Next, knowing the cost of a cylinder of liquefied gas, you can calculate how much it will cost to heat a house.

However, it is not necessary to buy cylinders. You can use a gas holder. Gas consumption for heating a house of 200 m2 in this case will not differ. Simply pumping a large volume of gas into a gas tank for a whole season at once will be more profitable than buying a large number of cylinders.

Reducing consumption

This is known: if you insulate your house well, the fuel consumption for heating will be significantly reduced. Therefore, before selecting and installing equipment and laying main routes, it is necessary to properly insulate the house: walls, roof and attic, floor, replace windows, and make an airtight sealing loop on the doors.

Particular attention should be paid to the roof and windows. It is assumed that out of 100% of lost heat, 35% goes through the roof, about 25% is lost at the windows. Therefore, use the best thermal insulation materials and good double-glazed windows, which have a low thermal conductivity coefficient. Cheap double-glazed windows are immediately obvious: their aluminum or steel “skeleton” is always very cold in winter, and a lot of heat is lost directly through it. Even the glass itself does not transmit heat as much as the metal profile on which the glass is held does.

Warm floor or conventional radiators

Also, the correct heating design plays an important role. It is estimated that a well-designed and implemented heated floor will reduce gas consumption. Conventional radiators would require more gas to heat indoor air to the same level. This is due to the fact that thanks to a warm floor, heat rises from bottom to top and spreads throughout the entire area of ​​the room. But conventional batteries heat the outer wall, which is why their efficiency is lower.

Also, the floor temperature standard is 50 degrees, radiator temperature is 90 degrees. Obviously, the floors will be more efficient and economical. Yes, the project and installation of flooring will cost more, but the difference in price will pay off very quickly.

We use modern automation

Well, and the obvious things: you can save gas by correctly setting the heating time. For example, if you are away from home from morning to evening, then in the boiler (if it supports such a function) you can set the thermostat to a low temperature and program an increase in power at a certain time. And if you are away from home for weeks or even months, then ideally you need to set the coolant temperature to 3-5 degrees. And let it be cold in the house. The main thing is that the pipes do not freeze.

Modern technologies have gone far ahead in this regard. Many boilers can be equipped with modern automation, which allows you to control the device remotely. You can command the boiler to change mode from your smartphone while at work. For this purpose, special GSM modules are installed on the equipment. And there are many similar smart systems. If used correctly, actual heating costs can be reduced. Sometimes savings can reach 30, 40 and even 50%. Of course, this depends on how often you are at home and what the temperature is outside.