Saving requires careful calculations! What will be the gas consumption for heating a 200m2 house?

When designing a heating system, home owners must clearly understand How much will it cost to heat a living space?

The reason for unprofitable operation is the incorrect selection of equipment, incorrect design, walls with poor thermal insulation. Therefore Correct calculation is important.

When it is completed, the person starts from the amount received and accepts final decision on equipment purchase.

What is the average fuel consumption for heating a 200m2 house?²?

It's one thing when the expense is calculated in an equipped house. Record the readings from the meters, add them up, calculate the arithmetic mean. But when they are just getting ready to set up house with a heating system and choose an energy source, completely different methods are used.

Photo 1. Diagram of the heating system of a private two-story house using a gas boiler from a gas tank.

Natural gas

The most convenient energy source for heating a private house. Choose a boiler based on its power. Both gas consumption and the profitability of the entire system as a whole depend on it. But power is not the only factor. Climate, region, insulation, number of windows and much more all have an impact.

Formula: V= N/Hi × nj

Transcript:

• V — the amount of thermal energy.
• N — the required power for heating.
• Hi — minimum specific heat of combustion.
• nj — efficiency coefficient.

Thermal power (N) is calculated in the ratio 1 kW/10 m².

Specific heat of combustion "—" is a tabular value. Its divide by 2, so we take the average value.

Types of Natural Gas

Exists 2 types natural gas:

• Gas type G 20 — 9.45 kW/m³.
• Gas type G 25 — 8.13 kW/m³.

The first type is used most often. The energy potential of the second is lower due to the increased nitrogen content.

Efficiency is indicated in the product passport, let's take as an example 84%.

All the necessary data has been obtained, it remains to proceed to calculating the consumption of natural gas for a room with an area of ​​200 m².

N = 1 kW 200 m2

Hi = 9.45 kW/m3

nj = 84%

V= 0.565m3/hour

Now we calculate the consumption for the week: 0.565×24×7 = 94.92m³.

The duration of the heating season may vary in regions, so we will take the average 7 months: 0.565×24×30.57 = 2896m³.

Thus, knowing the price per cubic meter, it is easy to plan the cost of annual heating.

Liquefied gas from cylinders or gas tanks

Used when the house is located at a great distance from gas pipelines. Supplied by a special service and stored in cylinders.

Calculating the consumption of liquefied gas is the same as for natural gas, but has its own nuances. For example, fuel is expressed not in cubic meters, but in kilograms, because it is not a gas.

It is also worth paying attention to fuel density (0.524 kg/l) And specific heat of combustion (45.2 MJ/kg). We use the same formula and substitute the value:

V = 4.7 / (6.58 × 0.88) = 0.81 l/hour

Consumption in a week: 0.8124×7 = 136l

Consumption seasonal: 0.8124×30.5×7 = 4150l

This is an option will cost a large sum. A lot of money is spent on transporting cylinders. But it is still more economical than, for example, electronic heating.

Useful video

Watch a video that talks about the features of heating a house with liquefied gas.

We reduce heating costs for 200 m²

To reduce costs will serve insulation at home (before the equipment is installed). It needs to be insulated floor, walls, attic and roof. Most heat is lost through windows and roofs. Therefore, it would be wise to purchase high-quality thermal insulation materials and double-glazed windowsIn the future, this will help you save on heating costs.