Post by mdshamiul777 on Feb 11, 2024 22:59:05 GMT -5
Energy consumption represents 25% of total energy consumption, compared to 50% represented by the transport sector or 12% represented by industry. It is therefore essential to undertake energy renovations in our residential buildings that reduce their energy demand and increase their efficiency with a double objective: reduce CO2 emissions into the atmosphere and lower the energy bill of our families.
The housing stock in Spain exceeds 25 million units Vietnam Email List and, taking into account that the Technical Code began to be applied in 2006, the work that remains for us to do is enormous.
If we analyze in more detail in which uses we consume most of the energy, there are three issues that account for 75% of this demand: heating and air conditioning 50% and hot water the remaining 25%. The rest of the uses (lighting, appliances and cooking) share the other 25%. In view of these data, it seems that attacking the heating and air conditioning chapters will be the most effective in achieving the objective, since they are the ones with the most margin.
It is evident that our country has many completely different climatic zones and therefore, to give an example, in the Pyrenees the demand for heating will be very high and in Malaga it will be the air conditioning that accounts for 50% of the energy. In any case, we can address the issue in several ways:
Reducing demand, that is, strengthening the envelope. We can insulate roofs, inject chambers, change exterior carpentry or glass and thus reduce demand by up to 20%.
Changing production with more efficient machines: condensing boilers, aerothermal energy, etc.
Replacing fuel and transforming obsolete coal or diesel installations to machines powered by natural gas, etc.
Incorporating renewable energies such as solar thermal or photovoltaic, geothermal or biomass.
Although there is little published data, it can be stated that a 100 m2 home with an A energy rating can save around €2,000 annually compared to one with a G rating.
Of course, the end user must evaluate this data and the impact on their monthly expenses. that the rehabilitation work in many cases will pay for itself in a short time. Furthermore, the subsidy policy and increasingly demanding regulations in this area will boost this activity in the near future.