Case 7: Residential apartment in Attica Region


Case parameters:

Type of construction: Renovation
Typology: a) Residential apartment of 108.3 m2, located on the 2nd (top) floor of a building constructed in 1971. Electrical cooling system, with a contribution on the energy consumption of the building up to 59%, Fossil fuels usage for heating with a contribution to 39%, Solar boiler for hot water usage in a contribution of 2.29% . The unit has an an energy label D.
b) Residential detached house of 109,0 m2, located in the Attica region constructed in 1989. The unit has an an energy label D.
Owner: Private
Construction systems: existing low thermally insulated family house, location in Greece.
Location: Greece, Attica

The challenge we face

More than 40% of the total Greek population (about 4.0 mil of the 10.0 mil total) live in Attica region. Most residents live in buildings constructed before 1990, with low energy performance factors such as high energy use levels, insufficient ventilation, uneven indoor temperatures, insufficient thermal comfort levels. Therefore, a deep level of renovation is required.
Given the fact that most of the buildings are privately owned and located in urban areas it is almost impossible (due to the excessive bureaucracy) and very expensive solution to reconstruct new buildings. A major renovation of the existing buildings would be the only practical, cost- effective and low-energy solution.

What we will do

We will:
– integrate thermal insulation system (installed on the external walls)
– install an integrated thermal insulation system (on the roof)
– install a high quality solar system for hot water. The system provides free hot sanitary water reducing the electricity or other energy source expenses.
– replace the old wooden windows (single glazing) with new high-quality opening systems windows (double glazing).
– Install the air conditioning (Heating/Cooling) and ventilation systems.
The demonstration scenarios can consist of Prefab P & P solutions for facades, roofs, additional modules, both 2D as 3D, faster renovation and acceleration of the process. We will improve the lighting comfort by introducing new transparent elements to the originally opaque wall. The air quality at the building location will be increased by removing potentially hazardous materials and introducing natural materials and vegetation to the facade. The overall use of circular renovation process is highly encouraged.

The results we expect

We expect to see the following results in Greece:

Total Case specific outcomes:
– This kind of renovation will offer a high energy performance improvement of around 60%
– The estimated reduction of the CO2 emissions will be 37% annually.
– Improve the public awareness to energy saving and efficiency and the additional benefits of these renovation process

Total Expected impact:
– Reduced operational costs for the residents
– Reduced maintenance and life cycle costs
– Increase the value of the property
– Extension of the life cycle of the apartment
– Improved comfort of living for the residents achieved by means of the insulated building envelope