The fact that a modern private home should be energy efficient is recognized by everyone. But not every homeowner can quickly determine how economical this or that house is in maintenance and operation. We tried to systematize the main features by which we can distinguish an energy-efficient house design from a conventional cottage.
A project for the construction of a private house today is less and less chosen by only focusing on the façade appeal, and more and more attention is paid to the energy-efficient characteristics of the building. There are several reasons for this. On the one hand, the cost of energy is increasing, and on the other, the possibilities of saving energy consumption are more affordable either. There are more and more energy-saving building materials and heating solutions in the field of alternative energy. You can hardly find new brick cottages built using classical technologies. They lose the competition to energy-efficient aerated concrete houses and warm ceramic blocks.
But the mere use of gas blocks or ceramic blocks does not make the house energy efficient. A building can lose heat not only through external load-bearing walls, but also through other building envelopes – windows, roof, and foundation. Moreover, the energy-efficient house itself is not an abstract project, but its concrete implementation on the ground. After all, the advantages of any energy-efficient house design can be offset by construction errors and the incorrect location of the building. Therefore, the assessment of energy-efficient characteristics of the house should be comprehensive – taking into account the energy-efficient advantages of the project, and the correctness of its construction.
In Western countries, a universal system for assessing the energy-efficient characteristics of a building has been introduced, which involves the assignment of an energy passport or certificate to a house. The building receives an energy certificate showing the energy class of the house after passing a series of standard tests. As in the case of household appliances, the standard classification is used in descending order – from class A (the most economical) to class G (the most wasteful). In many European countries, a house without an energy passport or certificate cannot be sold.
The energy-efficient characteristics of a cottage are usually determined by an energy audit of a house using a thermal imager. This device makes it possible to record the amount of heat leakage in the cold season and evaluate the energy efficiency of the building.
An energy-efficient home must be designed compactly and efficiently. Moreover, the area and its number of stories must exactly match the needs of the homeowner. Conventionally, several basic characteristics can be distinguished that make it possible to evaluate the building from the point of view of energy efficiency.
An energy-efficient house must be integrated into the landscape in such a way that the influence of the environment minimizes the heat loss of the cottage and ensures the passive use of the useful energy of nature.
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