By 2017, 7.8 percent of the European Union population said they did not have the economic possibilities to heat their homes. In Portugal, 20.4 percent of people accused this difficulty, which makes us the fifth country of the 28 where it is more difficult to heat the houses. Portugal is only supplanted by Bulgaria (36.5 per cent), Lithuania (28.9 per cent), Greece (25.7 per cent) and Cyprus (22.9 per cent).
Eurostat data also show that in countries with lower temperatures (Austria, Netherlands, Finland, Sweden, Luxembourg), this difficulty is less felt.
These data come at a time when it was also known that the Casa Eficiente 2020 Program is, for now, below expectations, something already acknowledged by Minister Matos Fernandes in Parliament, although the ruler shoots for the bank and the interest rates practiced responsibility for failure.
According to Vasco Peixoto de Freitas, a specialist in the field of thermal, the problem lies in the complexity of the program: "Any incentive program whose associated complexity is not accessible to the ordinary citizen and whose economic benefit is not evident can hardly be very successful ", Says the university professor.
It should be remembered that any private owner of a building or an autonomous fraction to be rehabilitated can apply for the program, considering works in the opaque surroundings, in the glass enclosure, in the lighting systems, in the elevators and in the ventilation conditions. It also contemplates the installation of energy management systems and intervention in the supply and drainage networks that promote energy efficiency.
The application requires the presentation of a detailed budget of the operation, the permanent certificate of the land register, the building passbooks of each building or fractions, the candidate's acceptance statement attesting to the conformity of the work with the conditions of the Program and the proof of the regularized tax situation of the candidate, as well as other information that may be required by the selected bank (so far Caixa Geral de Depósitos, Millenium BCP and Novo Banco have joined). In order to complete the operation, the candidates will have to perform a simulation, after which the list of application elements will be obtained. Then, the candidate returns to the Portal with the access data and starts the preparation of the application. The next step is the submission of the application to the bank, which includes the budget of the company (s), who will execute the work, selected from the Casa Eficiente portal Directory. If the evaluation of the application is favorable, the loan agreement between the bank and the candidate is concluded, and then the work begins.
Refocus attention on comfort
Although energy efficiency is of great importance in planning for the next decade, Vasco Peixoto de Freitas insists on putting the emphasis on minimizing discomfort in the case of Portugal, where there are no heating habits, whether "for reasons of climatic, cultural or economic ". The teacher recalls that "we have very uncomfortable homes in the winter period with one of the mildest climates in Europe." This is not without prejudice to the fact that Portugal is characterized by a scenario of energy poverty, resulting from a combination of high energy costs and low family incomes.
In this sense will also the study developed by LNEC at the request of ADENE on the passive solar behavior of dwellings. The objective was to test an indicator of passive solar thermal behavior of residential buildings based on data collected in the Building Energy Certification System (SCE). In this way, it is intended to contribute to the minimization of discomfort through an adequate thermal quality of the envelope. This indicator was developed based on the estimate of the average indoor temperature of the house during the coldest month, in order to transmit more easily to the consumer and technicians the potential of the fraction to be comfortable in that period.
The study was applied to 19 fractions of different typologies and different climatic zones of the country.
It is recalled that from 2020 new buildings should be of almost zero energy needs (for public buildings the rule has already entered into force in 2018). For this, it is of great importance that the fractions are designed so as to have satisfactory passive solar behavior.
Source: Construction Magazine