Case
Energy efficiency in buildings
Solar thermal energy
For more than 80 years, the VELUX Group has created better indoor environments by bringing daylight and fresh air into homes and other buildings all over the world. The VELUX Group was founded in Denmark and is today an international company with a presence in 37 countries.
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Atika is a house for the Mediterranean climate that looks into the future of our living environments.
It focuses on creating a healthy, low-energy environment with good indoor comfort and optimal daylight conditions all year round, supporting the efforts of the European Commission to save energy.
It offers a solution for an energy-efficient house in regions with plenty of sun, mild winters and hot summers, where ventilation and cooling systems are traditionally major energy consumers.
In Atika, traditional and low-tech solutions such as natural ventilation and shading meet the latest technology in a wide range of the newest VELUX products in a contempor-ary architectural environment.
Atika’s special feature is the roof with different slopes, where windows can be placed depending on the daylight conditions and ventilation effects you want to obtain.
Solar energy
In the Mediterranean climate with higher radiation rates, the sun can provide nearly all the energy to produce domestic hot water and a share of space heating. But there is a certain paradox in the fact that sun shines strongest when less heat is needed. The performance of these systems must therefore be reduced in the hot summer and energy stored for the winter periods. But storing energy from summer to winter is difficult.
Atika has an innovative system, with the solar collectors supplying energy not only for heating but also for cooling purposes. They can accumulate about 70 % of the hot water supply and up to 30 % of the energy for space heating. When cooling is needed, the solar collectors provide energy for the house’s air conditioning system.
Daylight
Windows and solar panels are placed strategically depending on the different slope angles of the roof.
Following roof slope research carried out by the architects, each space in the house has been considered independently in terms of its orientation and the incidence of sun on the roof slope and the window openings. The roof angle depends on the need to absorb or protect from the sun’s angle of incidence.
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