Sfax, Tunisia
HQ buidling of the Company for Studies and Development of North Coast of the City of Sfax (SEACNVS)
The SEACNVS built its HQ building in Taparura, Sfax in 2017. This Office building comprises 3 floors and has in total a built-up area of 1376 m². It forms part of a five-floor block, including two residential floors at the top. The main measures to save energy are thermal insulation of the exterior walls and basement of the ground floor, treatment of thermal bridges, the use of efficient bay windows, the installation of an efficient lighting system and the installation of an efficient heating and cooling system. The implementation of these measures has resulted in an annual energy saving of around 45.2 MWh in electricity.
Project info
- Construction phase
- New construction
- Building type
- Non-residential building
- Detailed building type
- Office
- Net floor area
- 1376 m2
- Land plot size
- 1273 m2
- Stories
- 3 stories
- Construction type
- Mixed construction
- Original construction year of the building
- 2017
- Project contact
- Company for Studies and Development of the North Coast of the City of Sfax (SEACNVS)
- Contact email address
- projet.taparura@seacnvs.com.tn
Project team
- Developer(s)/owner(s)
- Company for Studies and Development of the North Coast of the City of Sfax (SEACNVS)
- Architect(s)
- Mr. Lotfi Rejeb
- Energy efficiency consultant(s)
- Arch.: Mr. Ahmed Frikha & Eng.: Mr. Adel Gabsi
Building Rating and Certifications systems
- Rating and certifications systems
- Other
- Other certification
- The building has acheived the 1st rating per the Tunisian Thermal Regulation (62 kWh/m².a)
Building Envelope
External walls
- Description of construction
- Basement: Double brick walls with rock wool and plaster (N/W façades) or compressed earth and exterior polystyrene (E/S). Upper floors: Double brick with rock wool and plaster (N/E/W), with exterior polystyrene on the south façade.
- U-Value
- 0.91 W/(m²*K)
Roof
- Roof type
- Flat roof
- Description of construction
- Not relevant - The roof of the second floor is an adjacent floor between the second and third floors and is therefore not exposed.
Openings and windows
- Glazing type
- Double glazed
- U-Value glass
- 1.6 W/(m²*K)
- Frame material / description
- The frame is constructed from aluminum.
- Overall u-value window
- 1.9 W/(m²*K)
- Description of construction
- The bay windows and windows are constructed with an aluminum frame and 6/6/6mm bronze double glazing.
Basement floor
- Description of construction
- The basement floor is constructed with a 25 cm reinforced concrete slab insulated with a 10 cm lightweight concrete screed.
- U-Value
- 1 W/(m²*K)
Technical Building Systems
Ventilation system
- Type of ventilation
- Free ventilation (windows)
Space cooling system
- Primary space cooling system
- Reversible air-water heat pump
- Efficiency
- 3.2
- Description
- The cooling system uses energy-efficient reversible air-water heat pumps with fan coils. Variable speed pumps circulate water, and two-way modulating valves adjust flow. The system is managed by a GTB control system.
Space heating system
- Primary Space heating system
- Heat Pump (air-water)
- Description
- The reversible cooling system also serves the dual purpose of providing space heating for the building.
Water heater system
- Primary water heater system
- Dedicated electric heater (dedicated = just hot water generation)
- Efficiency
- 98
Lighting system
- Primary lighting system
- Linear fluorescent lamps (LFL)
- Efficiency
- 90
- Description
- The lighting system includes T5 LFLs with electronic ballasts and CFLs in offices, T5 LFLs in parking areas, and LED spotlights in toilets, terraces, and the entrance porch. Presence sensors control lighting in toilets, corridors, and parking areas.
- Secondary lighting system
- LED (Light emitting diode lamps)
- Description
- The lighting system includes T5 LFLs with electronic ballasts and CFLs in offices, T5 LFLs in parking areas, and LED spotlights in toilets, terraces, and the entrance porch. Presence sensors control lighting in toilets, corridors, and parking areas.
Photovoltaics
- Capacity
- 7 kWp
Final Energy Demand
- Energy carrier (1)
- Electricity
- Total specific final energy demand
- 86 kWh/(m²*a)
