Tunis, Tunisia
HQ building of ENDA tamweel in Tunisia
Enda Inter-Arabe built the headquarters of Enda tamweel in El Khadra district in Tunis in 2011. This Office Building comprises 5 floors and has in total a built-up area of 2917 m². The main measures implemented to save energy are the thermal insulation of roof terraces and exterior walls, the installation of efficient windows, shading of window, the installation of an energy efficient lighting system, an energy efficient heating and cooling system and a building management system. These measures have resulted in annual energy savings of electricity of around 162.5 MWh.
Project info
- Construction phase
- New construction
- Building type
- Non-residential building
- Detailed building type
- Office
- Net floor area
- 2917 m2
- Land plot size
- 1500 m2
- Stories
- 5 stories
- Construction type
- Mixed construction
- Original construction year of the building
- 2011
- Project contact
- Enda Inter-Arabe
- Contact email address
- info@endarabe.org.tn
Project team
- Developer(s)/owner(s)
- Enda Inter-Arabe
- Architect(s)
- TASMIM Architecture et Aménagement
- Energy efficiency consultant(s)
- Arch.: Mr. Chaker Zayati & Eng.: Mr. Mohamed Sadok Bouallègue
- HVAC consultant(s)
- International Development Consultants (IDC)
- Other project team partners
- Control Agency: VERITAS
Building Rating and Certifications systems
- Rating and certifications systems
- Other
- Other certification
- The building has acheived the 1st rating per the Tunisian Thermal Regulation (74 kWh/m².a)
Building Envelope
External walls
- Description of construction
- The building's 44cm thick external walls consist of a 2cm exterior cement mortar, 15cm thermostone, 5cm air gap, another 15cm thermostone, and a 2cm interior bastard mortar layer.
- U-Value
- 0.29 W/(m²*K)
Roof
- Roof type
- Flat roof
- Description of construction
- The building's roof, with a 16+5 hollow body structure, is lightly insulated with a 10cm cellular concrete slope. Layers include a 0.4cm waterproofing membrane, 3cm cement mortar, 5cm armoured concrete, 16cm hollow body, and 2cm bastard mortar.
- U-Value
- 1.13 W/(m²*K)
Openings and windows
- Glazing type
- Double glazed
- Overall u-value window
- 3.1 W/(m²*K)
- Description of construction
- The bay windows are constructed with frames made from aluminium (standard) and clear double glazing, with a thickness of 6/6/6 mm.
Basement floor
- U-Value
- 2.2 W/(m²*K)
Technical Building Systems
Ventilation system
- Type of ventilation
- Free ventilation (windows)
Space cooling system
- Primary space cooling system
- VRF reversible air-air heat pumps
- Efficiency
- 4.2
- Description
- The building's space cooling is provided by a system equipped with VRF reversible air-air heat pumps and fan coil units.
- Manufacturer(s) / products
- HITACHI
Space heating system
- Primary Space heating system
- Air-conditioning system (reversible for heating; air-air heat pump)
- Description
- The building's space heating is provided by the same system of VRF reversible air-air heat pumps and fan coil units.
- Manufacturer(s) / products
- HITACHI
Lighting system
- Primary lighting system
- Linear fluorescent lamps (LFL)
- Efficiency
- 60
- Description
- The lighting system comprises luminaires with T5 LFLs and electronic ballasts in the offices, CFLs with presence sensors in corridors and toilets, LED spotlights in parking areas, uncovered terraces and the entrance porch.
- Secondary lighting system
- Compact fluorescent lamps (CFL)
Shading devices
- Type of shading system installed
- Static (fix) shading systems as part of the building architecture (e.g. Maschrabiyya, porch roofs, pergolas)
- Description
- The provision of solar shading is achieved through the utilisation of metal-based shading devices, which are horizontally installed in front of windows on the south-west façade and vertically installed in front of windows on the north-west façade.
Final Energy Demand
- Energy carrier (1)
- Electricity
- Total specific final energy demand
- 82 kWh/(m²*a)
