Home heating with natural gas is considered the most convenient and economical for the consumer. Profitability is ensured by the relatively low cost of gas and the high efficiency of modern heating boilers. The final consumption of blue fuel and, as a result, the financial costs of the homeowner depend on the power and efficiency of the boiler.

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## What affects the consumption of the gas mixture

The following factors affect gas consumption:

- climatic features in the region where the equipment is supposed to be used
- construction of the building, its volume and architecture
- heat loss of the house, which are calculated based on thermal conductivity
- building materials
- quality of insulation of load-bearing external walls of the house
- Boiler power and efficiency

The power of the boiler is calculated in accordance with the regulatory requirements for each room of the house separately, taking into account all of the above factors. These calculations are quite complex and are made on the heating system of the building.

Another way to save gas is to install a forced ventilation. To calculate the heater, you can use ours.

**The recommended power of the boiler is always higher than the calculated indicators required for heating a particular house.** For example, if the documentation recommends the use of a boiler with a capacity of 15 kW, then the heating system actually requires 10–12 kW of thermal power. It is real data that must be used in gas flow calculations.

For approximate calculations, you can use a simplified method, where for heating 10 m^{2} a private house requires 1 kW of thermal power generated by a heat generator.

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## Example for district heating

Addition by topic

Note!

The initial data were taken for the G 20 brand gas mixture. It is she who enters the houses from the centralized highway.

In order to calculate the gas consumption for heating, you must use a fairly simple formula.

**V**= **Q** / (**Hi** X **efficiency**)

where:

**V** – fuel consumption m^{3}/h;**Q** — the estimated thermal power required to heat the house;**Hi** – the lowest value of specific heat during fuel combustion. According to DIN EN 437, for fuel grade G 20, this value is 34.02 MJ/m^{3}.**efficiency** — efficiency of the boiler unit, the value of which shows the efficiency of using the thermal energy released during the combustion of the gas mixture for heating the coolant.

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If a high efficiency condensing boiler is used for heating, the Hi value for G 20 gas is 37.78 MJ/m^{3}.

Initial data: house area 100 m^{2}, the recommended power of the heat generator is 10 kW. Boiler unit efficiency 95%.

- The first thing to do is convert joules to watts. To do this, you need to know that 1 kW = 3.6 MJ. For gas grade G 20, the calorific value will be 34.02 / 3.6 = 9.45 kW.
- The value of 10 kW is the amount of heat that will be required to heat the house in the most unfavorable conditions. During the rest of the heating season, much less power is required to heat the house. Based on this, for correct calculations it is necessary to use half of the recommended power. In our case, half is 5 kW.

We substitute the data obtained: V u003d 5 / (9.45 x 0.95) Total: gas consumption for heating a house 100 m^{2} is 0.557 m^{3}/h Based on the data obtained, it is easy to calculate the consumption of main gas per day and for the entire heating season, which lasts 7 months in most regions of Europe.

- For 24 hours 0.557 x 24 u003d 13.37 m
^{3}; - For 30 days 13.37 x 30 = 401.1 m
^{3}; - For 7 months (heating season) 401.1 x 7 = 2.807.7 m
^{3}.

Knowing the tariffs for paying for a cubic meter of “blue fuel”, it is possible to accurately calculate the financial costs of heating for the billing period.

Departing from the topic, we want to inform you that we have prepared comparative reviews on gas boilers. You can get acquainted with them in the following materials:

## Calculation example for autonomous heating of a building

In order to realistically assess the consumption of a liquefied propane-butane mixture, and at the same time your financial costs for heating a building, you can make a simple calculation based on the formula provided. For example, let’s take the conditional structure we have already considered, with an area of 100 m^{2}heat generator efficiency 95%.

Addition by topic

Note!

For calculations, the following data will be needed: bottled gas is a mixture, brand G 30. It has a density of 0.524 kg / l. The heat released during the combustion of 1 kg. of this mixture is 45.2 MJ/kg.

- For ease of calculation, convert the value of the heat released during the combustion of fuel from kilograms to liters: 45.2 x 0.524 u003d 23.68 MJ / l.
- Convert joules into watts that are more understandable to a layman: Recall that 1 kW = 3.6 MJ. Total: 23.68: 3.6 = 6.58 kW/l.
- For a correct calculation, take 50% of the recommended power of the boiler. 50% of 10 = 5 kW.

So, when heating a house with gas cylinders, the consumption of the fuel mixture G 30 will be V = 5 / (6.58 x 0.95); V = 0.8 l/h.

For a day, heating a country house with bottled gas will entail the consumption of the latter: 0.8 x 24 u003d 19.2 liters.

- For a month: 19.2 x 30 u003d 576 l;
- For the heating season (on average 7 months) — 576 x 7 u003d 4032 liters.

Those who are interested in the number of cylinders should use the following calculation scheme: It is known that the capacity of standard propane-butane cylinders is 50 liters. For safety reasons, they are filled with no more than 85%, which is 42.5 liters. Now it’s easy to calculate the number of cylinders you need:

- For a month 576 / 42.5 u003d 13–14 pcs.
- For the heating season 4032 / 42.5 u003d 95 — 100 pcs.

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The resulting average value of liquefied gas consumption will be useful for calculating financial investments __only for home heating__ during one heating season. When using a gas stove and gas appliances, the data will increase significantly.

**Which heating scheme for a private house is a priority for you?**