Stakeholders

Function : Construction Manager

Valode et Pistre Architectes

01 53 63 22 00

 http://www.v-p.com

Function : Contractor

Armanéo (EIFFAGE)

Contracting method

Other methods

Energy consumption

• Primary energy need : 80,00 kWhep/m².an
• Primary energy need for standard building : 137,29 kWhep/m².an

Calculation method :

Breakdown for energy consumption : Heating: 11.832 kWhep / m² Cooling: 6.544 kWhep / m² DHW: 6.544 kWhep / m² Ventilation: 31.828 kWhep / m² Auxiliaries: 5.312 kWhep / m² Lighting: 21,384 kWhep / m²

• Initial consumption : 301,00 kWhep/m².an

Real final energy consumption

Final Energy : 33,00 kWhef/m².an

Envelope performance

• Envelope U-Value : 0,79 W.m^-2.K^-1
More information :

Sprockets insulated from the outside (R = 4.12 m².K / W)
Opaque sections of North & South facades insulated from the interior (R = 3.15 m².K / W). North & South joinery Uw = 1,6 W / m².K
Access to the inertia of floors in offices (no false floors)

• Building Compactness Coefficient : 0,17

Indicator : I4

• Air Tightness Value : 1,70

Systems

Heating system :
• Urban network
• Heat pump
• Radiant ceiling
• Tape
Hot water system :
• Individual electric boiler
• Urban network
Cooling system :
• Water chiller
• Reversible heat pump
• Urban network
• Tape
Ventilation system :
• compensated Air Handling Unit
• Double flow heat exchanger
Renewable systems :
• Heat pump

Smart Building

BMS :

Class A GTB within the meaning of EN.15.232; Commissioning mission over 2 years of operation

Urban environment

• Green space : 300,00

"La Grande Arche" is located in the business district of La Défense. It is an emblematic building, extremely well connected (public transport, shops, activities, services).

Product

Rainwater harvesting network



Eiffage

[email protected]

 http://www.eiffage.com/home.html


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The rainwater from the roof of the south wall of the Ark is recovered by two sheets of 20 m3 at the lower level to each feed a sanitary column of the offices of the South wall.
The objective of this system is to reduce drinking water requirements by at least 16%.

Construction and exploitation costs

• Reference global cost : 192 000 000,00 €

Reference global cost/Work station : 192000000

Water management

• Consumption from water network : 800,00 m³

Water Consumption/m2 : 0.01

Water Consumption/Work station : 0.37

40m3 of storage recovering about 1000m². The sizing was dictated by the possible collecting surfaces and the storage volume available in the roof.

Indoor Air quality

No measurement carried out. However, 95% of the materials in contact with indoor air have an A + label for indoor air emissions (formaldehyde at 28d <10μg / m3)

GHG emissions

• GHG in use : 4,00 KgCO₂/m²/an
Methodology used :

RT2005

• Building lifetime : 50,00 année(s)

Life Cycle Analysis

Eco-design material :

40000sqm of carpets labeled Gut. This guaranteed label of low emissions in indoor air, a lower consumption of resources throughout the life cycle of the product