Sfax, Tunisia
Energy renovation of the house of Taieb Al-Mhiri Football Stadium maintenance manager.
The municipality of Sfax renovated the house of Taieb Al-Mhiri Football Stadium maintenance manager in Sfax, in 2015. This Single Family House - detached (villa) comprises 2 floors and has in total a built-up area of 211 m². The villa comprises two distinct parts: the first, constructed in 1990, and the second a more recent addition. The two parts of the building were constructed using different materials. The main measures implemented to save energy are thermal insulation of the roof and exterior walls, installation of new double glazed PVC windows, window shades, new energy efficient lamps, new energy efficient split ACs, new energy efficient refrigerator, a solar water heater, a grid-connected PV system, and an energy management system. These measures resulted in annual energy savings of around 70%.
Project info
- Construction phase
- Refurbishment
- Building type
- Single Family House (SFH)
- Detailed building type
- Single Family House (SFH) - detached
- Net floor area
- 211 m2
- Stories
- 2 stories
- Construction type
- Mixed construction
- Original construction year of the building
- 1990
- Project contact
- Municipality of Sfax.
- Contact email address
- riadhhajtaieb2040@gmail.com
Project team
- Developer(s)/owner(s)
- Municipality of Sfax.
- Energy efficiency consultant(s)
- Mr. Mohamed Bouallègue
Building Rating and Certifications systems
- Rating and certifications systems
- Other
- Other certification
- RELS methodology.
Building Envelope
External walls
- Description of construction
- The existing external walls have been thermally insulated using a Rockwool complex for façade insulation, comprising a 5 cm Rockwool panel layer and a thin single-layer exterior coating.
- U-Value
- 0.467 W/(m²*K)
Roof
- Roof type
- Flat roof
- Description of construction
- The existing roof is insulated with an exterior system. It includes: 4cm Rockwool panel glued with bituminous glue, 0.4cm waterproofing membrane, 1cm screened sand, 3cm cement mortar with splitting joints, and a peripheral joint with the acroterae.
- U-Value
- 0.654 W/(m²*K)
Openings and windows
- Glazing type
- Double glazed
- U-Value glass
- 2.698 W/(m²*K)
- Overall u-value window
- 2.558 W/(m²*K)
- Description of construction
- The windows are constructed with frames made from PVC and fitted with clear double glazing, with a thickness of 5/10/5 mm.
Basement floor
- U-Value
- 2.192 W/(m²*K)
Technical Building Systems
Ventilation system
- Type of ventilation
- Free ventilation (windows)
Space cooling system
- Primary space cooling system
- Mounted single-split or window air conditioner│Usually a visible smaller system mounted outside the wall or above the window just supplying one room
- Efficiency
- 3.40
- Manufacturer(s) / products
- Coala
Space heating system
- Primary Space heating system
- Air-conditioning system (reversible for heating; air-air heat pump)
- Manufacturer(s) / products
- Coala
Water heater system
- Primary water heater system
- Solar Thermal collector on the roof
- Description
- The solar water heater installed comprises a solar thermal collector with a surface area of 4 m² and a storage tank with a capacity of 300 litres.
- Manufacturer(s) / products
- Aquasolar
Lighting system
- Primary lighting system
- LED (Light emitting diode lamps)
- Efficiency
- 80
- Description
- The LED lamps used are 5 W power and have a luminous efficiency of 80 lum/W.
Shading devices
- Type of shading system installed
- Static (fix) shading systems as part of the building architecture (e.g. Maschrabiyya, porch roofs, pergolas)
- Description
- Shading elements has been installed to prevent undesired direct solar irradiation from entering the building. The sunshades installed are manufactured from aluminium and are shaped like an aeroplane wing. The shading elements are 21 cm wide and have been installed in a vertical configuration, with a distance of 25 cm between each one for windows facing east, west, northeast, northwest and southeast.
Photovoltaics
- Capacity
- 2 kWp
Final Energy Demand
- Energy carrier (1)
- Electricity
- Annual heating demand
- 4.58 kWh/(m²*a)
- Annual cooling demand
- 11.17 kWh/(m²*a)
- Annual lighting demand
- 3.52 kWh/(m²*a)
- Annual hot water demand
- 5.66 kWh/(m²*a)
- Total specific final energy demand
- 30,41 kWh/(m²*a)
