How to build an energy efficient house?

There are several reasons to perform construction of their own homes for energy efficiency technologies.The main reason is that the operation of your home you will incur lower costs.But it is also important that the sale of such options will be more attractive to buyers, and the price for it can be set much higher.

In connection with the latest developments in the global energy market can draw the following conclusion.Price for main source of energy, namely oil, is very unstable and will continue to grow.If you look back and analyze the cost of oil, these statements are true.So you have to somehow get out, for example, to plan the construction of energy efficient buildings and the purchase of energy efficient equipment.

not only material benefit is an advantage of this type of houses.After all, reducing energy consumption, we purify our atmosphere from harmful contaminants and substances arising from the combustion of fuel.Most people think that this is a negligible contribution to cleanse the plan

et, and the population continues to acquire allergic diseases as well as diseases of the epidermis and stomach.However, this is not true, but people can work together to deal with this scourge.

on energy that we spend in our homes?

If you take an ordinary private house, there are several "eaters" of energy:

  • various appliances;
  • light;
  • heat;
  • water heating.

About 72% of all energy is spent on heating our homes.This is because earlier in our country did not think about saving and building houses, not paying particular attention to thermal insulation.In Europe, the situation is not as deplorable, but their record is also poor - 57%.

will understand the notion of energostandartov

energy efficient construction became popular in the nineties.The first interested in this Germany, France, Sweden and Switzerland.European experts have begun to link the energy loss from poorly insulated houses, the irregular shape of buildings as well as buildings with a poor location relative to the cardinal.The cost of correcting these deficiencies are insignificant, so why not save?It was then that began to divide the types of residential buildings:

  • Energy-efficient house.These are considered to be construction, it consumes no more than seventy percent of the current from the energy consumed by a conventional house.Moreover, such structures are used in plants using renewable energy sources (windmills, solar) and thermal insulation around fifteen centimeters.
  • construction with low consumption.Here, the relation to the consumption of a standard house no more than forty-five percent, and the isolation of about twenty centimeters.
  • Passive construction is considered to be the building with a very low consumption - 30% compared to standard buildings.The engineers achieve these results thanks to the excellent insulation, the proper use of the heat - natural and that which is consumed in the mediocre vent systems.Typically, these homes are equipped with thermal insulation thickness of thirty centimeters, an independent source of electricity and heat.
  • Buildings, do not consume energy.Yes, it plans to use, and are, moreover, they also will deliver electricity to the network.However, it is only an experiment.Thermal insulation in these homes - forty centimeters.

Calculating the heat

If we take into account that most of the electricity is wasted heat, the energostandart homes selected on the basis of factor E. It indicates the seasonal heat demand - reflects the amount needed for heating squaremeter.Let us examine what determines this factor:

  • quality insulation.
  • type ventilation.
  • building orientation to the cardinal.
  • number of domestic heat.

Also worth noting seasonal factor normalized heat consumption E0.It also determines the amount of heat required to heat a cubic meter, but on condition that the building was erected in compliance with all rules and regulations.E0 is calculated as the ratio of the outer walls to the heated volume.

How profitable energy-efficient house?

technology improved, and if you look to the future, we can say: the construction of houses - it's economical.Now the capital allocated to the construction of passive buildings, 20 percent more than the cost of building a standard building.Several years later, the difference is reduced by 10 percent.And it can be confirmed by experience of foreign builders.Energy-efficient house - a good option for investment.Confirmed this, consider the following example.As an example, take a normal villa area of ​​150 squares, which is home to one family.As the thermal installations in the home choose a gas boiler.Then the cost of housing will be commissioned as follows:

  • heating - 144 kW / m2;
  • water heating - 30 kW / m2;
  • household needs (appliances, cooking, light) - 26 kW / m2.

In this case, it turns out that for the year this house will consume 30,000 kWh.If instead of the standard energy-efficient homes take a wooden house, the picture is the following:

  • heating - 44 kW / m2;
  • water heating - 30 kW / m2;
  • household needs (appliances, cooking, light) - 26 kW / m2.

energy house will consume in a year of 15 000 kW.Total, you can save on the exploitation of the house about 50%.It is encouraging information.

area windows

Now, in newly constructed buildings can often find large glass facades.However, the design does not allow windows to achieve thermal protection, thermal protection of the capital close to the walls.On the other hand, from the position of the illumination space, large windows reduce power consumption for artificial lighting.You have to find a middle ground.When designing the most optimum ratio is considered to 6: 1, where 6 - is the area of ​​the floor, and 1 - the window.For example, consider an energy-efficient home and a room of 36 square meters.The optimum glazing area then it will be about 6 square meters.

design of energy-efficient homes.Catalogs projects

Statistics show that in the west, about 80% of private homes being built on the finished project.Is it possible to build on the basis of these options, energy-efficient house?Projects in large quantities are in special directories, and which of the many options to choose?

very important task - to reduce power consumption to a minimum.As noted above, the lion's share of it is spent on space heating in the winter.However, it should be understood that by increasing the layer of insulation, the house does not make energy efficient.There must be a comprehensive approach.It is important to remove all the linkages of cold air, as well as to provide mechanical ventilation.

pay attention to the walls and roof

Before the acquisition of the project it should be carefully examined for compliance with continuous insulation.Energy-efficient house - a building, which is very important for the issue of integrity.Due to this characteristic of the cold air will not enter the room.Shall be sealed everything from doors and finishing the roof.The walls of these houses are plastered with a double layer, and the roof is carried out with insulation and vapor barrier.The joints and fastenings are closed special tape.

calculation efficiency

As noted above, energy-efficient building is considered to be consuming no more than seventy percent of the electrical energy from the amount that consumes a normal house.Consider the ratio of E and its value:

  • For the average home factor.E is less than or equal to 110 kW / m2.
  • for energy-efficient home factor.E is less than or equal to 70 kW / m2.
  • factor for passive houses.E is less than or equal to 15 kW / m2.

the west is considered a more modern method of calculating the energy efficiency of buildings koefffitsientu Ep.It represents the amount of energy required for heating, ventilation, water heating, lighting and air conditioning.Consider the classification of buildings, depending on the EF:

  • factor for passive buildings.Ep is less than or equal to 0.25.
  • budget for buildings it is less than or equal to 0.5.
  • buildings for energy-saving factor.Ep is less than or equal to 0.75.
  • For ordinary buildings, he is less than or equal to 1.
  • factor for passive buildings.Ep is less than or equal to 0.25.
  • For the most energy-intensive buildings Ep is greater than 1.5.

Question ventilation and heating

We have already said that the energy-efficient home should be equipped by mechanical ventilation with heat recovery function.Therefore, choosing a project, it is necessary to make sure that the house such ventilation is provided.This is important because conventional ventilation will not function in an airtight house.Also worth noting is that the gravitational ventilation works well at temperatures just above zero, so in summer it is almost useless.

sealed energy efficient homes in the best show itself mechanical ventilation, which will receive heat from the exhaust air.This ventilation allows to manage at home without the usual water heating system, which will lead to savings on radiators, pipes and heating installations.So be careful when choosing energy-efficient house: projects should include this type of ventilation.

Some subtleties of construction

Let us subtlety construction of such buildings.If you plan to build energy-efficient house with his own hands, it is necessary to know the exact number of people who will live there.After all, the people themselves create domestic heat - when washing, cooking, use of electrical appliances.It turns out that the house is not too big to be considered energy efficient under the condition that they will live a few people.Also, it is necessary to carefully treat the effective current consumption by choosing energy-efficient appliances and equipment.It will be useful to equip the houses adjoining land according to the cardinal, and the climatic conditions in your region.


Design and construction of energy efficient buildings in the future will be almost the only trend in the construction industry.So you need to think about that right now.