JUAN C. SANCHEZ
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@_JuanCsanchez_
WILLIAM OF THE PALACE
Updated Monday, February 28, 2022-01:30
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The already urgent need for the Spanish building stock to renew itself to
improve its efficiency
has increased even more with the energy crisis that began when the price of electricity skyrocketed and worsened with the current rise in fuel prices.
It affects both homes and private premises as well as Administration buildings, which rarely manage to reach not only the best possible ratings, but the approved scraping.
The State, in fact, is going to dedicate 435 million euros to increase the efficiency of its park, which only has an A or B rating in 10% of cases.
The outstanding, the A that from the European institutions ask that it be promoted, corresponds to only 1.9% of the total.
Ecographic house efficient lamps low consumption
The problem is that, according to experts, practically nothing built before 2010 complies with the regulations.
In other words, of the nearly 27 million buildings in Spain, only those erected in the last 12 years are efficient.
In those that do not, the starting point may be very far from that alphabetical excellence: it does not start from a B or a C, but in many cases it is E or F.
In addition, a single reform may not serve to raise the letter, although it will improve efficiency somewhat.
In addition, in some cases, such as changing the windows, it has additional advantages, such as also isolating noise from the outside.
However, this may make it impossible to receive aid for works, since if efficiency is not clearly increased -that is, it goes from one letter to another-, they may be left out of subsidies.
Ecographic house efficient acoustic insulation
For example, Catalonia has just opened the application period for aid for the rehabilitation of buildings within the framework of the PREE 5000 program (just over 5.5 million euros), but the eligible actions must achieve a reduction in primary energy consumption non-renewable 30% with respect to the starting situation, which must be justified with the energy efficiency certificate before and after the rehabilitation of the building, according to the Spanish Association of Manufacturers of Light Facades and Windows (ASEFAVE).
If you do not reach that 30%, there is no help.
Ultrasound chart for efficient house with double window
In any case, the reforms can be of various types, although there are three fundamental areas: protect the facades, improve the internal consumption of the buildings and modernize their elements.
Ecographic efficient house efficient air conditioning
The first of these pillars is the one that usually requires more reform as such, since what it does is stop the transfer of energy with the outside, which means that the heat leaves in winter and enters in summer.
Doors, windows, roofs and the facade itself and the bowels of the building are the elements that will receive the reforms.
Ecographic house efficient solar panels
In the second case, the devices that allow saving energy or consuming a green source would already enter.
Solar or photovoltaic panels (some heat water, while others generate energy) are the most common, not to mention aerothermal and geothermal, which take advantage, respectively, of the temperature difference between the interior and exterior of the building and the building itself. heat from the earth to cool buildings.
The second technique is more difficult to implement in an existing home.
Ecographic house efficient rational use of water
Lastly, there are changes to specific elements, such as efficient taps, which, as their name suggests, result in less water being wasted.
This not only avoids wasting the liquid, but also the energy used to heat it.
Light bulbs can also represent an important change, although the use that is going to be made of them must be taken into account.
Ecographic efficient house underfloor heating
In addition, in this section the change in heating would also enter.
Traditional radiators concentrate the heat in a single point, so it is much more complicated to heat a house than radiated floors, which distribute the heating better.
In the same way, in smaller homes, a heat pump may be more efficient, which, although it consumes more, heats the room faster.
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