Construction Week features Rustomjee Natraj in one of the ‘10 best green buildings’ in India in ‘The Green Issue’ (Pg. 34). The project was meticulously designed with an objective to reduce carbon footprint and improve the working environment for the occupants. Mr. Chandresh Mehta states that the ownership of sustainable buildings result in clear benefits for the investors, be it low operating costs, an improved marketability to a better productivity and well-being.
RNI Registration No. MAHENG/2008/33387, Postal License No. MH/MR/N/146/MBI/10-12. Posted at Patrika Channel Sorting Office, Total number of pages 74 G.P.O., Mumbai 400001 on due dates 3rd & 4th of every month. Date of Publishing on 29th and 30th of every previous month. CONSTRUCTIONWEEK vOluMe 3 • issue 10 N ews • a N a ly s i s • C O M M e N T • p r Oje CT s • CON T r aCT s • T eN d er s juNe 2012 • MuMbai • `50 e n gagin g c on structive re ade rs 1.16 BILLION SQ-FT OF SUSTAINABLE BUILDING 1,643 An itp publishing indiA publiCAtion www.ConstruCtionweekonline.in GREEN STRUCTURES IN 2012 A GREEN HOME CAN SAVE 30- sustainability COUNTRY IN THE 50 PER CENT WATER SECOND GREENESTbest green buildings 10 WORLD 250 LEED CERTIFIED GREEN BUILDING EXISTING IN p28 INDIA A GREEN HOME CAN SAVE 20-30 PER CENT ENERGY eco-friendly INDIA BUILT 1ST GREEN BUILDING IN 2001 INDIA’S PER construction chemicals the CAPITA ELECTRICITY & ENERGY CONSUMPTION 5,000 KW/H p50 DEVELOPED WORLD’S IS 13,000 KW/H GLOBAL PER CAPITA crane safety reaching new heights WATER AVAILABILITY TO DECLINE TO 1,140 CU-M/PA IN p64 2050 3-5 PER CENT COST ESCALATION IN CONSTRUCTION OF A GREEN BUILDING GREEN BUILDINGS OBTAIN 2 PER CENT OF THEIR ENERGY FROM RENEWABLE OR GREEN SOURCES 70–100 PER CENT OF USED WATER IS TREATED green FOR LANDSCAPING AND AIR CONDITIONING GRIHA RATES EVEN NON-AIR CONDITIONED BUILDINGS AS GREEN INDIA’S PER CAPITA WATER AVAILABILITY TO DECLINE TO 950 CU-M/ PA BY 2050 1.16 BILLION SQ-FT OF SUSTAINABLE BUILDING 1,643 GREEN STRUCTURES IN 2012 A GREEN HOME CAN SAVE 30-50 PER CENT WATER SECOND GREENEST COUNTRY IN issue THE WORLD 250 LEED CERTIFIED GREEN BUILDING EXISTING IN INDIA A GREEN HOME CAN SAVE 20-30 PER CENT ENERGY INDIA BUILT 1ST GREEN BUILDING IN 2001 INDIA’S PER CAPITA ELECTRICITY & ENERGY CONSUMPTION 5,000 KW/H AGAINST DEVELOP WORLD’S 13,000 KW/H GLOBAL PER CAPITA WATER AVAILABILITY TO DECLINE TO 1,140 CU-M/PA IN 2050 3-5 PER CENT COST ESCALATION IN CONSTRUCTION OF A GREEN BUILDING GREEN BUILDINGS OBTAIN 2 PER CENT OF THEIR ENERGY FROM RENEWABLE OR GREEN SOURCES 70–100 paying tribute to india’s environment PER CENT OF USED WATER IS TREATED FOR LANDSCAPING AND AIR CONDITIONING GRIHA RATES EVEN NON-AIR CONDITIONED BUILDINGS AS GREEN INDIA’S PER CAPITA WATER AVAILABILITY WILL DECLINE TO 950 CU-M/PA BY 2050 Cover Story BUILDING GREEN 28 ConStruCtion week june 2012 Cover Story The doubters should take another look: India is going green. Now second only to the United States in terms of sustainable square feet, India has undergone an environmental revolution that is seeing a tremendous growth in green construction. To mark Environment Day this month, we present a selection of 10 of India's very best commercial green buildings and analyse their innovation. By Syed Ameen Kader june 2011 ConStruCtion week 29 Cover Story O ften criticised for neglecting ventilation are being reconsidered and this cent of the used water is treated and re- environmental issues in trend is expected to pick up.” used for landscaping and air conditioning. favour of economic growth, According to Ahmed, the green building Through these measures, green buildings India is constantly at movement is also moving quickly. “LEED save on operational costs and simultane- loggerheads with developed countries in India is diversifying with more specific ously promote sustainability. Green build- their calls to adopt greater sustainability. rating systems like green factories, green ings also emphasise reduction of construc- “The Indian real-estate sector is divided SEZs and green townships. The Griha tion wastes and demolition debris. into players who take the importance of rating system has added SvaGraiha for sustainability seriously, and those who residential buildings,” he adds. Quick ROI do not. The latter group, which forms the Rahul Saraf, MD of Forum Projects, Though the green buildings entail higher majority, has issues with overall profitabil- which has just completed its first green development costs, investment could be ity since it costs money to render land and project, feels developers are slowly realis- recovered through various tangible and buildings sustainable,” says Gagan Singh ing the advantages of green building in intangible benefits. The initial cost for of Jones Lang LaSalle India. “The laws of India, and thus there is a massive growth developing a green building may be higher change resistance underline the difficulty in green buildings. “I think the future of (5-7 per cent) than that of conventional in persuading people, corporations and na- green building in India is very bright. The buildings but the long-term benefits are tions to adopt sustainability practices.” IGBC is making a tremendous effort to in- many. Extra costs can be recovered over a However, the number of green projects corporate green building techniques in the couple of years through energy savings and has grown considerably over the past eight majority of developments in India. Griha low operational and maintenance costs. years, thanks to initiatives being under- aims to ensure that all kinds of buildings Even though green buildings can be taken by developers, as well as state and become green buildings. The strength of pricey, Ahmed of EDS Global believes central governments. According to the Griha lies in the fact that it rates even non- they should still offer a win-win for both IGBC, 249 certified buildings already exist, air-conditioned buildings as green and developer and client. “The developer spread over an area of 1.16 billion sq-ft. puts great emphasis on local and tradition- should sell his building for a premium but Developers including Tata Housing, al construction knowledge,” he says. the occupier should get energy and water Godrej Properties, K Raheja, Kalpataru savings, plus the other intangible benefits and Mahindra Lifespace have initiated the Advantages of building green during the operational period, and the ex- process of green development, and this is A LEED-rated green building typically tra premium paid should be recovered in a fast catching on among others. A number saves between 25 to 30 per cent in energy, reasonable time. Moreover, the developer of corporate houses are making sure that with gold-rated buildings being over 37- may not incur huge extra costs for going their office buildings or factories are con- per cent energy efficient. On average, green green if he adopts sustainability as a policy. structed with sustainability in mind. buildings obtain two per cent of their Green features should be incorporated at “The future for green buildings is look- energy from renewable or green sources. the design stage to minimise costs and pre- ing bright at the moment,” says Hisham This energy efficiency proves beneficial vent costly retrofits later on,” he suggests. Ahmed, an energy analyst at EDS Global. during peak periods, when energy costs Construction Week has handpicked 10 “The market has slowly transformed and rise due to higher demand. green commercial projects spread across green buildings are becoming the norm. A They also use between 20 and 30 per the cities of India to illustrate the coun- pleasant outcome of this emphasis on sus- cent less water than similar conventional try's green drive. These LEED-certified tainability is that building design is going buildings. This reduces operational water projects present good examples of sustain- back to its roots of solar passive architec- expenses and the pressure on civic ame- able construction, which not only reduces ture. Traditional design features like shad- nities. Moreover, pressure on an area’s carbon footprint but also the operating and ing devices, jalis, mass cooling and natural sewage system benefits when 70 to 100 per maintenance cost for the buildings. 1. TCS Techno Park - Phase II, Chennai Ten of The besT commercial green buildings 2. Supreme Chambers, Mumbai 3. Natraj by Rustomjee, Mumbai 3 2 9 4. HCC 247 Park, Mumbai 7 5 5. Knowledge Boulevard, Noida 8 6. Times Square, Mumbai 7. Unitech Info Park Tower 3 & 4, Noida 4 8. Godrej Waterside IT Park, Kolkata 6 1 10 9. Grundfos Pumps Factory, Chennai 10. Hydro Building Systems, Bangalore 30 ConStruCtion week june 2012 Cover Story supreme chambers condominium, mumbai This project was built on a previously developed site to reduce the pressure on underdeveloped land, and also to gain access to basic services as a means to reduce automobile pollution. Effective erosion and sedimentation control measures were followed as per National Building Code of India. Trees around the peripheral area have been preserved and retained, while total rainwater runoff is recharged into the local aquifer using the deep recharge bore well technique. Surplus amounts of surface landscaping and roof gardens have been planned to restore the habitat and bio-diversity at the project site. The building’s energy consumption was optimised using interactive and sophisticated energy simulation tools, and Ashrae standards were used to benchmark and compare the LEED Rating: Platinum (2012) performance of the building. Care was taken to plant native Built-up area: 5.2 million sq-ft and adaptive species to reduce the need for irrigation, and the Owner: TCS, Siruseri, Chennai Principal architect: Carlos Ott & Carlos Ponce landscape was designed to incorporate the efficient drip-and- de Leon sprinkler irrigation system. A sewage treatment plant provides Local architect: CR Narayana Rao LLP the entire non-potable water requirements of the building, Construction duration: 2.5 years such as for cooling towers, irrigation and toilet flushing. The project diverted all the possible waste generated dur- ing construction for reuse and reprocessing, while building Tata consultancy services materials contain recycled content in order to reduce the demand on virgin materials. The air-conditioning and ven- Technopark, chennai tilation system, meanwhile, was designed to provide 30 per cent more fresh air than the Ashrae standard. This is one of the largest campus projects in the Asia-Pacific With its core business involved in the manufacture of region with 5.2 million sq-ft of built-up area, accommodating plastic products, Supreme Industries wanted to a build- 25,000 IT workers and several hundred support staff. It imbibes ing that would promote the company’s image of producing green building features from the conceptual stage and has been green products and in itself act as a brand ambassador. rated platinum for Phase II and Gold for Phase I by the IGBC. “When we started our project, the green building concept The project is located in the IT hub of Chennai, comprising of was in its infancy. With very low awareness of the sustainable six engineering buildings and 12 general services buildings. In the concept in the construction industry, it was very difficult to un- former, the workstations have been placed along a north-south derstand and implement its nuances. There were very few green axis, while the less regularly occupied areas form an east-west operators and suppliers at the time, and procuring appropriate line, which is devoid of glass to reduce solar ingress into the of- building materials was a difficult task, not least in terms of cost. fice space — a passive feature in reducing air-conditioning loads. Maintaining schedules was always a challenge,” said Gurdeep Moreover, shading devices on each floor level of the engineering Singh Parmar, senior project manager of Supreme Industries. blocks and high SRI roof sheeting at terrace level adds to this ben- efit. The ground floor is lined with landscaped gardens around the building’s periphery for further improvement of micro-climate. LEED rating: Platinum (2011) The external lighting was designed to achieve 50 and 80 per Built-up area: 3.68 lakh sq-ft cent savings over the limits laid out by the American Society of Owner: Supreme Industries Heating, Refrigerating and Air-Conditioning Engineers (Ashrae) Architect: Sanjay Puri Architects for building façades and exterior areas respectively. External per- vious areas, along with a huge water harvesting structure, were designed to retain 100 per cent of storm water catchment onsite. A tertiary-level sewage treatment plant was installed, with the reclaimed water used to meet the building’s entire irrigation needs, and over 60 per cent of the cooling tower's requirements. Annual power consumption has been reduced to 150 kW/h per sq-m, against the industry benchmark of 260 kW/h per sq-m. Other benefits are CSR, increased employees satisfaction and pro- ductivity levels, and greater green awareness among employees. Approximately three per cent of the project cost has been spent on providing additional green features, such as renew- able sources of energy, low VOC paints and certified wood. 32 ConStruCtion week june 2012 Cover Story to maintain better air quality in the building. Power con- sumption has been reduced by up to 15 per cent, while water savings have been measured at up to 30 per cent. “The ownership of sustainable buildings results in clear bene- fits for investors, ranging from drastically lower operating costs to improved marketability, longer life-spans, significantly increased occupant productivity and well-being, as well as more stable cash- flows,” said Chandresh Mehta, director, Rustomjee Group. 247 Park, mumbai This commercial building possesses one of the largest combined floor spaces of 1 lakh sq-ft, and has been designed to use 24 per cent less energy than conventional buildings. With high-efficiency chillers, intelligent lighting, daylight sensors, the use of double-glazed fenestration-orientated glass, the savings on electricity alone is 20 per cent. The glass used has an inert gas filling to eliminate sound pollution, minimise heat gain and maximise daylight incursion. Use of a CFC-free, high-efficiency chiller and 20-per cent reduced lighting power density results in an estimated 21 per cent savings on annual energy spending, and 24 per cent of the annual energy consumption. The interiors incorporate low-VOC content materials to reduce the effect of allergies. To lower heat absorption, the roof is covered with glazed white cement tiles, to cre- ate a heat island effect. This helps maintain a comfortable LEED rating: Gold (2011) Built-up area: 2.86 lakh sq-ft micro-climate temperature and reduces the pressure on the Owner: Keystone Realtors centralised chilling system. (Rustomjee) It also has storm water management, rain water harvesting Architect: IAG Consultants Construction duration: Three years and an independent utility building providing the required backup support for the entire complex. 247 Park has used top-of-the-line membrane bio-reactor technology for sew- age treatment, making this commercial complex equipped natraj by rustomjee, mumbai to fully recycle all waste discharge. It has systems to recycle all wastewater for use in gardens and other greenery, filling This project was designed to incorporate a wide range chillers, flushing toilets and washing public spaces. of sustainable practices and green building features in “It was quite a challenge to build a green building in India, order to reduce carbon footprint and improve the working as a lot of materials and finishes required were sourced from environment for its occupants. The project envelope has abroad, which put pressure on managing timelines. However, been designed in such a way that all office occupant areas the scenario is changing rapidly as more indigenous green offer a good amount of daylight and views. building material is being made available and construction Double-efficient glazing reduces heat gain and reduces workers are being trained in its use,” said Amol Shimpi, vice- air-conditioning load in occupied areas. The project was de- president for business development, HCC Real Estate. signed for zero discharge with 100-per cent wastewater re- cycled and reused for flushing, gardening and cooling tower LEED rating: Gold (2009) make-up water. Energy-efficient, high-COP water-cooled Built-up area: 1.8 million sq-ft chillers are used for air-conditioning, while the project was Contractor: BL Kashyap designed to retain natural resources and make the most of Architect: CR Narayanrao, Chennai an efficient rainwater harvesting system. Construction duration: 2.5 years Regionally extracted and manufactured materials with high re- cycled content have been used in the project, which also encour- ages alternate-fuel vehicles and car pooling by giving such trans- port preference in car parking areas, where electrical charging points for battery-operated cars and two wheelers are available. The terrace has been designed with high-SRI index ma- terials and a roof garden, which also reduces heat on upper floors. All common areas use low-VOC paint and adhesives 34 ConStruCtion week june 2012 Cover Story LEED rating: Gold (2011) Times square, mumbai Built-up area: 7.2 lakh sq-ft Developer: 3C Universal Times Square is one of India's largest LEED Gold-rated buildings, & Emirates Technology Construction duration: Three years and was developed by implementing optimally-designed passive and active strategies to minimise air-conditioning load and con- sequently energy consumption. Selecting the right wall assembly helped the project to cut down on heat gain from outside. It has a window-to-wall ratio of 56 per cent, which ensures less heat gain from exterior glazing. Also, double-insulated high- performance glass was used to balance daylight, views and energy savings. A layer of 30-cm extruded polystyrene insulation was laid under deck, helping to minimise heat gain through the roof. The finish is of reflective material, to bounce sunlight off at source. The building depth captures daylight for more than 75 per cent of occupied interiors to make the most of outdoor views, while natural lighting also helps reduce energy consumption by 1.5 per cent over Ashrae’s benchmark. A heat recovery unit provides a way to recover HVAC energy from the hot local climate; the en- ergy recovery wheel reduces ventilation load by up to 80 per cent, which saves energy and reduces the necessary size of the plant. More than 90 per cent of materials used have recycled content: all paints, adhesives, sealants, carpets and compos- ite woods contain low VOC to prevent the occupants from chemical-related illnesses while providing good IAQ. All re- frigerants used in the HVAC and refrigeration are CFC-free. Knowledge boulevard, noida Wastewater is treated on site by a sewage treatment plant, and the treated water is used to meet water requirements This Noida project has combined an energy-efficient design for irrigation, flushing and the AC cooling tower. with the goal of obtaining low maintenance and optimum “This project helped to break the myth that green does not operating cost. It was conceived as a campus with a conducive make economic sense for developer-promoted projects. The proof environment, providing common facilities shared by tenants. was clearly visible when it achieved very low air-conditioning The building is orientated from north to south for mini- loads, which helped to downsize associated chiller sizing, trans- mum direct sunlight. Eastern and western sides house the former/DG capacity and associated pumps and pipes. Thus, the building cores and have been provided with minimum fenes- building sets a new trend for its contemporaries and paves the tration as a buffer from heat gain. The building has been stag- way for other developers to follow suit,” the developer said. gered on the western side to provide a self shading effect. The lower floor was developed to have common areas which flow into soft, landscaped areas, reducing ambient tem- LEED rating: Gold (2012) Built-up area: 9 lakh sq-ft perature and radiation. The campus has peripheral vehicular Builder: Nilkanth Tech Park movement, with over 65 per cent of car parking under stilts Architect: Hafeez Contractor and in the basement to maximise landscape areas and reduce Construction duration: 4 years the heat island effect. The building’s depth is optimised to capture maximum daylight and views; double glazing has been provided to reduce heat gain and long-wave radiation. The building’s active and passive features together help in saving nearly 15 per cent of energy costs compared to Ashrae’s benchmark. Its HVAC system has high-COP water chillers, efficient motors, blowers and modulating fresh-air dampers linked to CO2 sensors. Its pre-cooled fresh air and heat recovery wheel further helps in energy conservation. This is a zero discharge building, where all rainwater is col- lected and taken to harvesting pits. The building used low-VOC paints, adhesive and sealants in interiors for occupants comfort. “The basic tenet behind green construction is to effectively use natural resources to reduce damage to the environment. We have adopted this as a mission and we have delivered projects that are user-friendly and aim to build a greener tomorrow,’’ said Vidur Bharadwaj, director of The 3C Company, adding that most of their future buildings will go for LEED certification. 36 ConStruCtion week june 2012 Cover Story LEED rating: Gold (2012) godrej Waterside iT Park, Kolkata Built-up area: 4 lakh sq-ft Architect: Upal Ghosh & Associates The building has achieved an energy performance of nearly Construction duration: Two years 20 per cent, which is lower than Ashrae’s 90.1-per cent baseline. This was achieved by incorporating double glazing with high-performance glass for the external façade, energy efficient chillers of 6.1 COP, variable frequency drives and a heat-recovery wheel with 80 per cent efficiency. Lighting power density has been maintained at 1.1 W/sq-ft. The window-to-wall ratio was redesigned from 30 per cent to 22 per cent to achieve better energy savings. Water efficiency has been improved by using low-flow fix- tures of 80psi, reducing potable water consumption by over 55 per cent, and by 100-per cent on-site treatment of waste- water. Highly efficient irrigation systems and strong sustain- able local plant species lead to a lower water requirement. On the recycling front, over 96 per cent of waste generated from the landfill has been diverted. The variety of materials with recyclable content used for the project amounts to around one-third of the total material value used when combined. As well as design practices, measures were planned and car- ried out during the construction phase to handle site erosion, construction pollution and stormwater drainage. An approxi- mate incremental cost of around seven per cent of the project cost was incurred to achieve the desired levels of sustainability. “Apart from being environmentally conscious, green buildings actually help our customers save on energy and water costs. Through thorough planning and execution of our buildings, we demonstrate that green buildings provide better quality spaces and life for its occupants,” said Rajeev Ramprakash, associate vice-president for design strategy at unitech infopark Towers 3 & 4, noida Godrej Properties. Part of development on a 1.2 lakh sq-m plot that will eventually have 11 towers, the building envelope of these two structures and their MEP services were designed to LEED category: Gold (2010) Built- up area: 22 lakh sq-ft meet IGBC’s CS Gold rating. Developer: Godrej Waterside Properties The project has achieved energy savings of 17.5 per cent Architect: PGP Architects, Mumbai & over the baseline set by Ashrae, with high-energy savings JPA Architects Kolkata achieved by incorporating a number of energy-conservation measures like under-deck and wall insulation, energy- efficient glass, efficient chillers and co-sensors for parking ventilation. By reusing treated water for flushing and irrigation, water consumption has been reduced over 20 per cent over the IGBC baseline. For segregation and storage of day-to-day waste, the project has provided a central collection area in the basement, and diverted more than 90 per cent of con- struction waste from landfills. The project has achieved a combined recycled content value of over 15 per cent of total materials. Steel, glass, aluminum composite panels and ce- ment have been used with recycled content. Dr PK Magu, president of architecture and planning at Unitech, said: “We believe in protecting and preserving the environment. For Unitech to achieve Gold rating under LEED India’s Core and Shell system testifies to the hard and co-operative work of all associates at Unitech. This gives us confidence in our ability to design and build the kind of sustainable structures that our society requires.” 38 ConStruCtion week june 2012 Cover Story LEED rating: Gold (2011) Built-up area: 1.11 lakh sq-ft Builder: CCCL Architect: VV Architects Construction duration: One year LEED category: Platinum (applied for) Builder: Bearys Infrastructure & Construction Engineering Architect: Architecture Paradigm, Bangalore Construction duration: 2.5 years grundfos Pumps factory, chennai hydro building systems, bangalore Grundfos recently completed its new factory in Chennai, The new headquarters of Hydro Building Systems and received gold certification under the IGBC Green in Bangalore has been designed and constructed in a Factories rating system — the company’s office building sustainable model following the LEED recommendations of in Chennai is already LEED Gold certified. The factory platinum-rated green buildings. The project’s application buildings incorporate green measures including water and for LEED certification is under process at the moment, and energy savings, environmentally friendly materials and an was recently recommended for ISO14001:2004+Cor.1:2009 enhanced indoor environment for its staff. for its environment management systems. The construction was completed by minimising soil ero- A solar-photovoltaic installation capable of generat- sion and site disturbance as much as possible. The building ing around 17.6 kW/hr of electricity was commissioned to incorporates effective rainwater harvesting to conserve wa- make the building sustainable. The solar cell system feeds ter as much as possible. The developers made special efforts electricity directly to the building, and covers around 30 to minimise water use by installing water-efficient fixtures, per cent of the electricity needed for lighting and operating effective rainwater harvesting and sewage treatment plant computer systems. to treat all onsite wastewater for reuse. The rainwater har- Potable water consumption for site irrigation has been vesting or storage system designed for the project captures reduced by 50 per cent through treated water from the sewage almost runoff volume from the roof and non-roof surfaces. treatment plant, and no CFC-based refrigerants were used in the In line with international standards, the refrigerants used in HVAC systems for the project. Its optimised energy perfor- the air-conditioning systems are environmentally friendly and mance ensured 33.3 per cent energy cost-reduction from the have very low ozone depleting and global warming potential. The base design. The building’s envelope performance complies with project has ensured that up to 96 per cent of total construction all Ashrae guidelines, while the project achieved a combined waste of debris is recycled or reused. The project has achieved a recycled content value of 19 per cent of total materials by cost. combined recyclable content value of 27 per cent of total material "Sustainability is the key for green construction and by cost, thereby reducing virgin material exploitation. aluminium fits perfectly there. With approximately 40 per “The factory building achieves exemplary performance cred- cent of world energy demands required to operate buildings its in using effective waste management techniques, water use today, energy efficiency in façade and fenestration is one reduction and reduction in virgin material consumption,” said of the key topics,” said Subhendu Ganguly, country head of Ranganath NK, managing director, Grundfos Pumps. Hydro Building Systems. 40 ConStruCtion week june 2012 Cover Story Materials the key for green building Construction materials and equipment need for artificial lighting, contributing have a major role to play, not least with significantly to a building’s sustainabil- growing demand for special materials ity,” says Subhendu Ganguly, country that are not only suitable for mega- head for Hydro Building Systems. projects but which also carry a number Steel is another green material of green features. As India is on the which is being used quite extensively way to become a genuine green for constructing pre-engineered-build- building market — it currently ing (PEB). Green is the buzz word in occupies second place in the world the industry and companies are trying in terms of the number of green to ensure that their factories are using square feet constructed — there is environment friendly materials. still a dearth of building materials The designs of steel framed buildings needed for these structures. This help in proper air flow, temperature serves to make green buildings control and provides healthy and com- somewhat more costly — between 10 fortable indoor. Even after demoli- to 15 per cent more expensive than tion, these buildings don’t accumulate regular buildings. But with the green wastage like asphalt shingles, concrete, movement gaining momentum, major brick and dust in the environment and vendors and suppliers are working on aluminium and steel can be recycled developing products that can reduce for other applications too. Pre-engi- carbon footprints. neered buildings are also 70 per cent Aluminium is one of the most recyclable and steel is almost 90 per important green building materials cent recyclable. for façade and fenestration. This is a uPVC is another green choice for plentiful material and can be recycled windows as it eliminates the depen- several times without loss of its prop- dence on wood which, in turn, leads to erties. The metal can save up to 95 per forest conservation. As well as being cent of the energy required for primary energy efficient, uPVC is also an envi- aluminium production, thereby avoid- ronment friendly material. ing corresponding emissions, including For interior construction, drywall sys- greenhouse gases. tems can be used. Such systems consist “Maximising the transparent areas of gypsum plasterboards fixed onto of windows through the use of slender metal frameworks. Its overall composi- aluminium frames can contribute to tion makes drywalls lighter than brick optimising solar gains. This increase in or block constructions, and gypsum natural lighting is definitely beneficial plasterboards and metal framing are re- for occupants’ comfort and wellbeing, cyclable, thereby reducing the amount while at the same time it reduces the of wastage on site. Drywall materials 42 ConStruCtion week june 2012 Cover Story tions allow building owners to increase energy management and reduce oper- ating costs,” says Rajesh Sikka, Trane business leader for India. Another HVAC player, Johnson Con- trols, which offers building automation systems, says in sustainability matters and green products are a boon to help in earning LEED certification. “Build- ing automation systems and energy-ef- ficient chillers can reduce energy costs by 25 to 40 per cent, thereby creating an ROI of 2.5 to 4 years,” says Seemant Sharma, director of engineered sys- tems at Johnson Controls. Eaton, which offers a broad range of energy-efficient and environmentally friendly electrical solutions, says its products can help a building go green and qualify for LEED credits through the USGBC. “In fact, Eaton products have the potential to collectively con- tribute up to 27 of the 69 total credit points needed for LEED certification,” also have lower embodied energy from ELCOMA, the Bureau of Energy Ef- says Anoop Nanda, regional MD for the manufacturing process and no wa- ficiency and NGOs, towards addressing Eaton Corporation’s electrical sector. ter is used in construction. India’s power crisis through promo- Jotun India offers eco-friendly As well as building materials, con- tion of energy-efficient lighting. A paints, and some of its products in struction chemicals have major role founding member of the IGBC, Philips the volatile organic compound (VOC) to play in green building, helping con- has a track record of 77 green build- category include Fenomastic Emulsion crete producers and contractors build ings in India already. We offer a range and Jotashield Extreme. The company and restore structures that perform to of energy-efficient lighting solutions says its paints are derived from natural the highest standards while minimis- across segments and are driving energy raw materials like citrus peel extract, ing environmental impact. Construc- efficiency in India.” beeswax, seed oils and tree resins. tion chemicals and technologies can HVAC systems also play a major Jotun is also a founding member of the be incorporated to lower energy and role in energy conservation. Accord- Emirates Green Building Council in water consumption, and enable the use ing to the World Business Council for the Middle East, and as well as a mem- of waste materials in finished prod- Sustainable Development, buildings ber of the IGBC. ucts and protect, maintain and restore worldwide account for 40 per cent of In construction it is important to have structures. global energy consumption. Of that materials manufactured locally, thereby Companies in the HVAC and lighting amount, between 45 and 65 per cent reducing environmental impact resulting sectors, including Philips Lighting, is used by HVAC systems that keep from transportation. It is also impor- Trane and Johnson Controls, have building environments comfortable tant that these materials use recycled been tremendously proactive in devel- and healthy. content, thereby reducing the impact of oping energy-efficient products. HVAC system provider Trane says it extracting new materials. The building Indranil Goswami, head of lighting is developing solutions that incorpo- envelope plays a greater role in creating application services at Philips Lighting rate emerging technologies to optimise an energy-efficient building, hence the India, says: “We have been consistently energy and operational efficiency, and choice and specifications of such materi- working with industry bodies, such as increase sustainability. “These solu- als are of prime importance. 44 ConStruCtion week june 2012 Cover Story karan Grover Change is part of our nature We have been building sustainably for centuries, but our biggest challenge today is to change behaviour by being teachers as well as students T he concept of energy significantly increasing investment costs. Inspiration compels us to seek out efficiency is complex, but the In architecture, we seek inspiration from idealistic solutions because when we solutions are relatively simple. the past in order to be better equipped to become inspired, we begin to dream. In India, we have the chance build for the future, and we should. This Our biggest challenge in making green a to learn from others’ mistakes as we plan idea of sustainability was not born out of new standard for development is chang- and implement development, with 70 per the ashes of some great tragedy; it was ing behaviour. Behaviour is the result of cent of the buildings our country needs created out of necessity. This need was the interaction between what we believe over the next 30 years not yet built. not fuelled by an obsession with a colour, and how we feel. If we want to change it, it According to the fourth assessment the need for points, or the fear associated is necessary to begin with the underlying report of the Intergovernmental Panel with climate change. Our ancestors built beliefs and the feelings related to it. on Climate Change, the building sector sustainably because it worked for their We are all creatures of habit, and pur- has the largest potential for significantly environment, and for themselves. poseful behaviour change is both difficult reducing greenhouse gas emissions, and Here in Asia, we have been building to achieve and harder to maintain. The is relatively independent of the cost-per- sustainably for centuries, and we have for level of intrinsic motivation, the value of it, ton of CO2 equivalent achieved. the most part remained respectful of the the perceived costs and benefits of chang- We must remind real estate companies environment that nurtures us. And though ing beliefs about our ability to perform that environmental sustainability is not the Western world has created most of the the behaviour change and, of course, the too distant from business sustainability. technologies that are at the forefront of support and reinforcement of others are Typically, those who design buildings the modern green movement, there is no important factors in this process. are not those who use them and pay for doubt that many of these green ideas are So, we must become teachers as well energy to run the buildings. So there based on our sustainable heritage. as students. We must learn what works is no incentive to invest in energy ef- The ancient Chinese used concentrat- within other cultures and discover how ficiency within the current framework. ed solar power for heat, energy and fire. to apply or adapt those principles to work Building awareness and educating on Native Americans used hot springs as within our own environment. But we must how buildings consume energy is impor- renewable geothermal sources for cook- also teach others what we have learned tant. Without this information, clients will ing and healing. Some speculate that the from our own heritage, and must share the not demand energy-efficient buildings. Egyptians used wind power to help build information that we have gained from our We need to set and maintain our own the pyramids. From Greece and Rome to own experiences. After all, “green” is not standards because policies and energy-effi- Persia and North America, incredibly in- an idea owned by a single person, state or ciency standards must be locally relevant. novative uses of geothermal, water, wind country. It is a product of our humanity — With proven and commercially avail- and solar power can be found. one that belongs to all mankind. able technologies, energy consumption Our inspiration is moments of intel- • Karan Grover is a renowned green in both new and old buildings can be cut lectual clarity that compel us to take architect and principal of Karan Grover by an estimated 30 to 50 per cent without action or stand tall for a worthy cause. & Associates 46 ConStruCtion week june 2012
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