The ITC Green Centre houses the headquarters of ITC’s Hotels Business
and was declared the worlds largest Platinum rated Green Building when
it was certified in 2004. The project was conceived to be a “Green building” in sync with
ITC’s commitment towards a “Greener” tomorrow.
Unique character to the building is that it got the Platinum rating at
a time when the rating was not customized to suit Indian condition
and priorities. Since most of their projects were rated Gold, ITC decided to go a
step ahead and try for the platinum rating. It may sound like a short
step forward, but it took the company a lot of time and effort to get
all the nuances of a platinum-rated green building right.
• The first hurdle was acquiring green materials like green wood
obtained from sustainable forests and low-volatility organic
compounds for construction, which at that time were not easily
available in the country. Here, ITC received help from USGBC,
which helped it source the materials.
Numerous energy sensitivity
exercises had to be conducted with ITC design and architecture
consultants and employees, sensitizing them with issues of
During the project design it was targeted to cut down the energy
consumption significantly, compared to a conventional building. At ITC
Green Centre, energy consumption has been slashed by as much as 51%
through design integration alone. In fact, in daytime, unlike other office
buildings, artificial light is not consumed at all here. The glazing for the
building has been designed to maximize the effect of natural light, largely
eliminating the need for artificial ones.
At the same time, the window glass, while allowing light inside,
does not allow heat. This, not only keeps the office cool from inside
during the day, but also decreases the load on air-conditioners
Architect’s requirements from glass.
According to Ar.Rahul Kumar of Rajender Kumar and Associates
who were the architects of this project, when they started working on the
facades they needed a company which gave them enough options to test
out the designs and do the energy modeling analysis.
Saint-Gobain with its expertise to address such situations could
work closely with the architect and the client and provided them
various options of modern sustainable glazing.
Challenges of sustainable glazing
It is always an interesting challenge to work out a sustainable
glazing design for tropical climatic conditions. While doing modern
office buildings one has to ensure that the light penetrates deep into the
interior spaces and at the same time keep the heat out.
ITC could achieve the twin proposition of lending in abundant
natural light yet cutting down the heat gain in the interiors with
advanced high performance glazing solutions.
• High energy efficiency of the façade with optimum light
• On the Northern side, the glass solution was required to give a
higher light transmission due to the orientation of the building
Frontal elevation showing façade design
The Green Building norms emphasize on daylight (natural lighting)
and unrestricted vision as they both are linked to human health and
productivity. Glass is the only material which can help to achieve
By giving the ‘L’shape configuration the width of the floor Plate is
reduced for the same amount of floor plate area thereby allowing natural
light to penetrate deep into the ‘interior spaces
The building is a composition of three parts.
• Two office wings are held together by a central atrium that as an
ensemble creates a large L-shaped figure focused on an exterior
• The L-shape blocking ensures that part of the façade is always
• The L-shape office wings end into hexagonal ends that make a very
strong presence on the approach roads.