Solaris, Sustainable architecture, Positive Energy and Well-being in the workplace
n SOLARIS, FRANCE’S FIRST
POSITIVE ENERGY BUILDING
• 31,000 sqm
• 882 car parking places, 90 places for
motorcycles and 100 for bicycles
• The structure comprises two separate
buildings, A and B, each with a surface
area of 15,000 sqm
Solaris, north view
• Average module size of 5,000 sqm
• Average depth of modules: 18 metres
• Floor clearance: 2.70 metres
• 1,000 sqm of interior gardens
• Terraces on upper ﬂoors An innovative project par excellence, Solaris already stands as the
• 4,223 sqm of solar roof panels benchmark for the future RT 2020 sustainability framework. The initial
• 120 geothermal probes going down idea was to erect a building which generates more electricity than it
to a depth of 100m consumes. That goal has been achieved, as Solaris will achieve positive
energy status in terms both of kWh-boe and hard cash.
To achieve such high performance, SERCIB has formed a multi-
disciplinary team of outstanding experts, including architectural design
by the “Architecture et Environnement” practice, thermal, static
and thermodynamic design ofﬁces, and economics and innovation
Solaris is a concept that can be reproduced on demand for units of
5,000 sqm. In the present case, the Clamart municipality will take
delivery of the ﬁrst SOLARIS building (building permit obtained on
11 octobre 2008 for a 31,000 sqm building).
n OUR FUTURE IS BEING
Deployment of a “Sustainable Development” approach has
already become an essential standard component in the design
of ofﬁce buildings.
Above and beyond those standards, the practical aspirations of
our contemporaries have changed.
Whether through exposure to the positions of Al Gore or via
Solaris, north view
news about the 2007 Grenelle de l’Environnement environmental
round table in France, a general awareness about the need for
urgent environmental action has arisen. An unstoppable trend
towards eco-citizenship has emerged on all continents.
The recent warning shot of high energy prices when oil was at
US$150 a barrel in mid-2008, heralding higher energy costs on
a lasting basis, stimulated economic realism.
All these observations have led to the realisation that in our
business as property developers, only buildings meeting
environmental responsibility concerns and which are
energy efﬁcient and generate renewable energy will satisfy
the market requirements of tomorrow.
Our sense of responsabilities has galvanised our company to
conceive buildings that are ahead of their times, pre-empting
regulatory and legal requirements for HPE (high energy
performance), THPE (very high energy performance) and BBC
low energy-consumption) buildings. This is how we have designed
a reproducible building that is ten years ahead of its time, and
which uses heat from the sun and the earth. This is France’s ﬁrst
positive energy building.
Solaris is an existing repoducible concept for environmentally-
Solaris, south view
responsible investors and end-users.
n A PROJECT DRIVING A SUCCESSFUL
Solaris is located in Clamart, in the south western Paris suburbs.The municipality is close
The tram project
to Paris and adjacent to Issy-les-Moulineaux, Vanves and Malakoff and forms a natural
extension to the south west Paris business districts while simultaneously beneﬁting from
spin-off from the Vallée Scientiﬁque de la Bièvre science park.
A very dynamic economic renewal programme has taken shape in the former industrial
estate (ZIPPEC) running alongside the A86 motorway, which has been renamed NOVEOS.
This is where Solaris was born. The emblematic development is playing a pivotal role
in the urban regeneration of the area and is being seen as a symbol of its sustainable
development and strong forward-looking bias.
Major international corporations have already been attracted to the area, including
MBDA, Renault, Coca-Cola, Danone, Sanoﬁ Synthelabo, Optic 2000, and Ela Médical.
The Clamart multimedia centre
As an unmistakeable sign of the regeneration of public space, the site will be on the route
of the new tram service which from 2011 will connect the Châtillon-Montrouge station
on Line 13 of the Paris Metro to Solaris, and continue onwards towards the suburbs of
Vélizy and Viroﬂay. As a highly environmentally-friendly means of transport, the tram will
strengthen the local public transport network and in addition to the metro line will also
link with Line C of the RER suburban express, the SNCF line into Paris Montparnasse,
and that of St Lazare-La Défense from Viroﬂay railway station. The site is also served by
four bus routes irrigating the Hauts de Seine département and also serving the adjacent
Essonne and Yvelines départements.
A district rehabilitated for new, strongly service-oriented usage has been totally reinvented.
A new economic momentum is genuinely underway at local level. With the immediate
proximity of the Forest of Meudon, the green lung of the surrounding economic community,
the site offers a living and working environment as outstanding as it is rare.
n SAVING TO PRODUCE MORE Texlon® rooﬁng used to create
EFFICIENTLY a microclimate at garden level.
Before it starts to generate electricity, a building must start by cutting down on energy use. Mobile membrane
The ﬁrst objective in the design of Solaris was thus to achieve even more exacting cuts in
energy consumption than those required by France’s BBC low energy-consumption building Incoming air
Solar and temperature sensors cause the upper air
chamber to be pressurised allowing light to penetrate
This was made possible by: through the gestalt graphics.
• a north-south layout and an optimized building shape.
• insulation via the outer shell of the building by abolishing thermal bridges,
combined with energy-efﬁcient glazing.
• the use of thermal inertia (internal mass).
• night-time over-ventilation + rotary heat exchangers.
• sophisticated regulation. Closed
As internal temperatures in solar gains increase,
• use of geothermal energy. the lower air chamber is pressurised reducing
the level of light and solar gain penetrating
• a garden creating a microclimate. the space.
Lot B2.3 Lot B2.4
Lot A2.4 Lot A2.3
BULDING B BULDING A
n SMART MANAGEMENT
About the lighting:
• Luminaires are located in accordance with workstation location and use low-consumption bulbs.
• Lights go on only when users are present.
• The lighting adapts to exterior lighting levels using dimmers.
About temperature control:
• The energy is stored in the ﬂoors using a network of coils.
• The heat generated during daytime building use is absorbed.
• In winter, 120 thermal probes tap the heat generated by the enormous mass of earth 100 metres underground
and inject it inside the building. In summer, the opposite happens.
• The dual regulation system is computer controlled.
• During mid-seasons, cheaper night-time over ventilation is used to store cold in the building’s interior structures.
This combination of technologies will enable Solaris to halve its energy bill, taking energy costs (before solar panel generation)
to just 7/sqm/year, compared with 16/sqm/year for an equivalent RT 2005 building.
n THE EARTH AND THE SUN AT THE HEART
Once it has managed to reduce its energy consumption, Solaris can
generate renewable energy.
This is how it becomes a positive energy building according to French RT
2005 calculation rules. To achieve this degree of performance, Solaris
takes its energy from two natural sources: the sun and the earth, by
• a roof installation comprising 4,223 sqm of solar panels (the biggest
roof installation in the Greater Paris region on a service building)
• 120 geothermal probes 100 metres deep, for a total of 12 km!
Combining these two systems enables Solaris to offset its energy
requirements, generate surplus energy and make substantial CO2 savings.
The value of the electricity generated and sold on to EDF, theFrench
Electricity Utility, is estimated at 291,000/year, or 9.38/sqm/year.
Solaris thus generates 9.38/sqm/year - 7.38/sqm/year = 2,38/sqm/
year net, which can be allocated to the tenant’s private use to operate
computers, printers, photocopiers, etc.
Solaris consumption 43.7 kWh-boe/sqm/year
Requirement: 1,266,907 kWh-boe/year
Generation: 1,320,960 kWh-boe/year
RT 2005 calculation basis
n WELLBEING FOR ALL
User comfort was a constant objective in the design of Solaris.
This comfort calls for HQE High Environmental Quality certiﬁcation: Solaris obtains a P (high)
or TP (very high) performance rating for each of the 14 HQE targets. Six targets are TP (note
that the HQE label requires applicants to achieve only seven P or TP targets out of the total
Users will also be able to beneﬁt from a 1,000 sqm breathing interior garden with a revolutionary
transparent rooﬁng material called Texlon®.This umbrella-type rooﬁng is made up of pneumatic
“cushions”, similar to bubbles, which offer enhanced temperature regulation and optimised light
ﬁltering. The garden creates its own micro-climate. Two large staircases link the fully-lit and
fully visible levels of the garden, guaranteeing the pleasant nature of the vertical circulations
which will, as a result, be used on foot.
• Inter-company restaurant
• Service lift
• Sun screens
• Exterior blinds (depending on façade)
• Reinforced ﬂoor area for storage
Ce qui est vrai restera (“True today, true tomorrow”) is SERCIB’s
baseline, adopted two decades ago, and it is as true now as it was then.
Solaris is ahead of its times.
In energy performance terms, the project is currently without doubt
the most sophisticated on the market. Among the challenges that
SERCIB has undertaken to meet are those of providing avant-garde
buildings which are nevertheless what the market wants, leveraging
new technologies by using those with a proven track record, reconciling
construction with environmental protection, and being an inﬂuential
player in urban regeneration.
n A REPRODUCIBLE CONCEPT
Solaris is a concept that can be reproduced on demand for units of 5,000 sqm
and above for environmentally responsible investors and end-users. SERCIB
can satisfy all demands in France and elsewhere. Depending on the latitude of
the countries concerned and their speciﬁc regulatory frameworks, the concept
can be adjusted, but the basic principles remain unchanged.
SERCIB supports the ten principles of the United Nations
6 rue Hélène Boucher – 78 280 Guyancourt - France
Tél : +33 (0)1 39 30 57 30 - Fax : +33 (0)1 39 30 57 39 - www.sercib.com
- Document non contractuel - Crédit photos / Illustrations et perspectives : Architecture et Environnement - SERCIB - Document imprimé sur du papier labellisé FSC / Photos Maire de Clamart et Infracom.