Average gas consumption for heating of a house of 200 m2: calculation features, examples and recommendations

When designing a heating system for a home, owners are required to know in advance how much heating will cost their living space during operation. In the end, it may be that the heating system will be trivial unprofitable in case of wrong choice of equipment, illiterate drafting or weak thermal insulation of the walls. Therefore, it is important to correctly calculate the gas consumption for heating the house by 200 m2. From the received figure it is already possible to start and proceed or not to start designing and purchasing equipment.

We consider the gas consumption for heating the house at 200 m2

One of the main values in the formula when calculating is the power of the equipment. Without it, it is impossible to determine the gas consumption for heating the house by 200 m2. Select the boiler based on the area of the house, and when calculating the flow are guided by the lowest temperature outside the window. The resulting value is divided in half, because in the street is not always below zero temperature. So the consumption will vary approximately in the same proportions.

Determination of boiler output

When calculating the consumption of liquefied gas for heating the house by 200 m2, first of all determine the capacity of the boiler. It is assumed that for every 10 square meters of heating space, 1 kW of power is needed. Proceeding from the fact that the value should be divided in half, take half - it's 50 watts per hour per square meter. At 100 meters square we need 5 kW of power; For 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 margin. If you choose a boiler with a capacity of 10 kW, then it must 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 of natural gas consumption for heating the house on 200 m2

There is a special formula for calculating:

A = Q / q * B.

In this formula:

1. A is the amount of gas per hour that should be determined.
2. Q - the power required for heating (in our case it will be 10 kW).
3. Q is the minimum specific heat. This parameter depends on the brand of gas used. If your gas pipeline uses G20 gas, this value will be equal to 34.02 MJ / cu. It needs to be converted into kilowatts by 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 that you choose. There are models on the market with KDP 80%, 90%, 95%, 98%. It is desirable to select a boiler with a higher efficiency. So the gas consumption for heating the house 200 per m2 will be less, and for a year the economy will be significant. At least for several years, the savings will exceed the cost of a higher cost boiler with a high efficiency. Suppose you chose a model with an efficiency of 95%. However, we can not put percentages in the formula. Therefore, we take the coefficient of 0.95 and use it.

All the figures are known to us. Now you just need to substitute them in the formula:

A = 10 / 9.45 * 0.95 = 1.0053 cu. M / hour.

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

Daily and monthly expenses

Now it remains for us to multiply the figure by 24, and we will get a daily gas flow, provided that the equipment is in continuous operation. Then multiply the value by 30 and get a monthly gas flow. In our case, the flow will be 720 cubic meters. In principle, this is a real gas consumption for heating a house of 200 m2, you need to know the cost of one cubic meter for your region and calculate how much it will cost.

Calculation of liquefied gas

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

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

Liquefied gas is always considered in kilograms. Then the value is translated into liters. For this, the value obtained should be divided by 0.54. In our case, a flow of 1.37 liters of gas per hour is obtained. Further, according to the usual pattern:

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

It should be noted that the standard cylinder is only 42 liters. This balloon is enough for about a day. To understand how many cylinders we need, just divide the amount of gas for a season by 42. Further, knowing the cost of a LPG tank, you can calculate how much heating will cost the house.

However, it is not necessary to buy cylinders. You can use gasholder. The gas consumption for heating the house by 200 m2 in this case will not differ. Simply uploading a large amount of gas to the gas holder at once for the whole season will be more profitable than buying a large number of cylinders.

Reduction of consumption

This is known: if it is good to insulate the house, the fuel consumption for heating will be substantially reduced. Therefore, before starting the selection and installation of equipment and laying the main roads, it is necessary to warm the house well: walls, roof and attic, floor, replace the windows, make a sealed sealing circuit on the doors.

Particular attention should be paid to the roof and windows. It is assumed that out of 100% of the lost heat, 35% goes through the roof, about 25% is lost on the windows. Therefore, use the best thermal insulation materials and good double-glazed windows, which have a low coefficient of thermal conductivity. Cheap double-glazed windows are immediately visible: their aluminum or steel "skeleton" in winter is always very cold, and directly through it much heat is lost. Even the glass itself does not let heat pass so hard, like the metal profile on which these glasses hold.

Underfloor heating or conventional batteries

Also, the correct heating project plays an important role. It is estimated that a correctly designed and implemented warm floor will reduce gas consumption. Conventional batteries would require more gas to heat the air indoors to the same level. This is due to the fact that thanks to the warm floor, the heat rises from the bottom up and spreads throughout the entire area of the room. But ordinary batteries warm the outer wall, because of which their efficiency is lower.

Also the standard of floor temperature is 50 degrees, the battery is 90 degrees. Obviously, floors will be more efficient and economical. Yes, the design and laying of the floors will cost more, but the difference in price will pay off very soon.

We use modern automation

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

Modern technologies in this regard have gone far ahead. Many boilers can be equipped with modern automation, which will allow to control the device remotely. You can use your smartphone to ask the boiler command to change the mode while at work. To do this, special GSM modules are installed on the equipment. And there are many similar smart systems. With proper use of these, the actual consumption for heating 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 the window.