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1. IT Park for Google.Inc BIRLA INSTITUTE OF TECHNOLOGY MESRA, PATNA ATUL PATHAK B.Arch Final Year Green Office Campus for G o o g l e .Inc (Upcoming first owned c ampus in India, largest outside U.S.) The Report Covers the pre-requisite studies done in accordance with the guidelines provided in the brief. It includes the Thesis site assessment and the a Case study undertaken at Google India Pvt.Ltd . Gurgaon. IT Park for Google.Inc 1 AR. MRIDUL KUMAR (Thesis Guide) Assistant Professor BIRLA INSTITUTE OF TECHNOLOGY MESRA, PATNA ( Dissertation topic : Structural Amendments/Innovations in Office Buildings for enhancing Daylight Abundance, and their construction methodology ) A Presentation on Case studies of Energy Efficient Office Buildings and their Campus As a preliminary study for the thesis on

2. CASE STUDY I - G o o g l e INDIA, GURGAON 1. General Information From joint workspaces to utilization of new materials, such as sound-absorbing material that helps keep the noise from a meeting from travelling too far, the Google office has got everything for its user based design so as to facilitate encouraging and extortive working environment that most offices failed to create . Objectiv e: To study the Office Planning and working environment of Google. To understand its Building Services and the Energy Effeciency Measures as implemented by the company subsidiary G o o g l e g reen . a) Name of the building, predominant use and its period of construction Google got 1,65,000 square feet of space in Unitech Signature Towers II in Aug. 2014 in Gurgaon, a world class corporate office development by Unitech Limited, India’s leading real estate player. Figure 7:North Elevation of the Building(Proposed) Figure 8 : Front Encroachment to the park b) Validity and objective of the case study Google has overall four offices in India and all of them are leased. Studying a google office only as an IT office is the interest of my thesis topic as the planning psychology and internal workspace environment differ from company to company according to their ideology. The prime objective of the case study is to understand the workspace and recreational space designing, their hierarchy and placement and other perks offered by google to their employees. Also, study of the building services and the unique interactive interiors and space frames is a must, that secludes google from rest of the companies. IT Park for Google.Inc 2

3. c) Location & connectivity from major urban area / activity centre. • Project is located in sector-15, NH-8, Gurgaon. (Next to 32nd milestone) with direct access to IGI airport, Delhi CBD, Sohna road and MG road. • Just 7 kms from the Toll plaza, 25kms from IFFCO chowk and 3kms from Sushant lok Metro station . Figure 9 : Location Proximities • Opposite a luxury hotel and in the high growth employment corridor home to top IT/ ITes & corporate giants. • Situated on the SEZ zone of Gurgaon, the site is on the most happening IT corridor of the NCR with office hub created by companies like DLF, Microsoft, KPMG, IBM, Sapiens etc. The Google Guragaon office is located in Unitech Signature Tower-II, Tower-B, Sector-15, Part-II, Village Silokhera , Sector 15-2, Sector 15, Gurgaon, Haryana on the Delhi Jaipur Expressway. d) Style of architecture (if any), Aesthetic quality / visual impact: Modernist Architecture. IT Park for Google.Inc 3

4. The shingled façade curtain wall system overlaps one another aesthetically as well as creates an intelligent element to cut off the bright daylight giving a beautiful blend of form and function helping the building to get the desired LEED GOLD certification e) Surrounding land use and character of urban form The site has architecturally noteworthy buildings in a wide range of styles and from distinct time period. Gurgaon's skyline with its many skyscrapers is nationally recognized, and the city has been home to several tall buildings with modern planning. Gurgaon has an estimated 1,100 residential high-rises. The surrounding is mostly the commercial and office dominated. On either side of the expressway there are numerous IT parks that come under the Special Economic Zone of Haryana Figure 10 : Factors of an Urban Form The Urban form is a metropolitan, being a NCR. f) Present status of the building: The building is fully functional. Signature Towers II along with upcoming Signature Towers III shall collectively supply over One million square feet of prime new generation work space in Gurgaon over the next 2-3 years. g) Byelaws for the area and their application in the case study: • 2 Tower • Total Land Area : 2.76 acres (Phase-1) + 1.03 acres (Phase-2) • Total Saleable Area : 2.5 lacs sq.ft . (Phase-1) + 1.0 lacs sq.ft . (Phase-2) According to HUDA Building Bye-Laws Permissible F.A.R - 250 % Max. Building Height for IT Industry - 30 m IT Park for Google.Inc 4

5. Figure 11 : The Site along the Expressway Site details : The total plot area of the office park is 8230 m 2 . i) Total Built up Area: 15,248m 2 . ii)Shape of the Landscape : Parallelogram iii)Terrain: Plain iv) FAR- 150 % v) Slope :Towards the Expressway vi)Contours : No Contours vii)Probable Access points : One main entrance subdivided into three ways : • Entrance for Pedestrians • Entrance for Vehicles • Vehicular Exit. viii) Building Height - 43 metres ix) Geomorphology: Geomorphology traversed by elongated ridges of Delhi quartzite. The area is conspicuously flat topography; however, in the north-eastern part small isolated hillocks of Precambrian rocks are exposed. • The alluvial plain is formed by the Sahibi River which is tributary of River Yamuna. • Soils of the Gurgaon district are classified as tropical and brown soils, existing in the north western extreme, northern and north eastern parts of the district and water logged and salt affected soils in the southern parts of the district. • The soils are medium textured. x) Topography: Few ridges and uniform slopes, otherwise plain terrain IT Park for Google.Inc 5

6. xi) Soil type and characteristics: Alluvial .Also ranges from Clay to clay lam. Major stratigraphic units described as under: Table 1: Major Soil Statigraphic Units of Case Site h ) Climate The climate of the district can be classified as tropical steppe, semi-arid and hot which is mainly characterized by the extreme dryness of the Air except during monsoon months, intensely hot summers and cold winters. During three months of south west monsoon from last week of June to September, the moist air of oceanic origin penetrate into the district and causes high humidity, cloudiness and monsoon rainfall. The period from October to December constitutes post monsoon season. The cold weather season prevails from January to the beginning of March and followed by the hot weather or summer season which prevails upto the last week of June. 2. Planning, Circulation and Functions: When employees at Google India walk into their new offices in Gurgaon on Monday, they'll be moving into a space that aims to stimulate their minds by providing a fun environment, similar to the company's work spaces around the world a) Architect’s objective and concept of design: When employees at Google India walk into their offices in Gurgaon, they'll be move into a space that aims to stimulate their minds by providing a fun environment, similar to the company's work spaces around the world . Signature Towers-II is a grade 'A' business office space located in the bustling trade and commerce hub of Gurgaon. It is fully equipped with state-of-art amenities and contemporary design for a truly professional setting. 10 IT Park for Google.Inc 6

7. Figure 12: Building Cafeteria Tower A Figure 13: Entrance walkway for pedestrians • Two towers: i)Tower A- Ground +10 Floors ii)Tower B- Ground + 7 Floors • Level basement parking i)Additional parking on surface for visitors as per design. ii)Access control (parking) and control barrier with electronic card swipe. • Centrally air-conditioned building with independent AHU's for each floor. • Diesel generators providing 100% power backup. Architect Callison from Seattle, USA envisioned modern, efficient and state-of-the art technology Commercial Office Complex Project is on the most recognized location- National Highway 8. The project integrates two separate office blocks into one single cohesive structure with each block having separate entries but a single core and lobby. The building is oriented in North-South (long axis) direction to minimize direct penetration of sunlight and yet get maximum daylight work environment. The front end of the building mass is aligned parallel to the National Highway 8 responding to streetscape. The massing of the building is a composition of two interlocking forms. The center cores are arranged such that when two blocks join at center, the common facilities integrate the blocks as well as create a beautiful composition of solids with voids. 11 IT Park for Google.Inc 7

8. a) Development of plan and form. The proposed site plan and the constructed design have few differences. The surface parking region shown by number 4 was not acquired, rather the plot is being utilized to develop Unitech Towers III. Figure 14: The proposed Site Plan Figure 15: Ground Floor Plan Tower A IT Park for Google.Inc 8 b) Plan Layout(Typical)

9. Figure 16: Upper Floor Plans Tower A 3. Construction System RCC Flat slab structure; maximum column spans to ensure high efficiency a ) Structural System and its validity: Long Span Systems that allow the space to be arranged to suit open plan offices have been utilized.. b ) Materials for construction. • External facade : ACP / Paint and Double insulated glass • Atrium with Marble/ granite floor finish as per design • Elevators Cabs finished with Stainless Steel. • Wall finish, lighting and ceiling as per design At Google’s offices worldwide, they put all building materials and products through a rigorous screening process to determine which adhere to our healthy building standards—and they purchase the products that best meet their stringent criteria. They request full transparency from their manufacturers and vendors, requiring them to provide them with comprehensive product ingredient information from every point in the supply chain. IT Park for Google.Inc 9

10. IT Park for Google.Inc 10 Work spaces in an office are typically used for conventional office activities such as reading, writing and computer work. There are nine generic types of work space, each supporting different activities.

11. IT Park for Google.Inc 11 Meeting spaces in an office are typically used interactive processes, be it quick conversations or intensive brainstorms. There are six generic types of meeting space, each supporting different activities.

12. IT Park for Google.Inc 12 Support spaces in an office are typically used for secondary activities such as filing documents or taking a break. There are twelve generic types of support space, each supporting different activities.

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14. IT Park for Google.Inc 14 b ) Interior Design and Pro-active working environment. When I visited the campus in March, my guide explained that no part of the office was more than  150 feet from food —either a restaurant, a large cafeteria, or a micro-kitchen—which encourages employees to snack constantly as they bump into coworkers from different teams within the company. Even if Google workers aren’t constantly generating new ideas, plenty of evidence suggests that they enjoy their work, and that this enjoyment feeds into motivation and eventually greater productivity. Google’s “150-Feet From Food” Rule There are egg-shaped meeting rooms lined with shag pillows , Irish pub-style lounges decked out with pool tables and a four-lane bowling alley complete with a disco ball . These are only a couple of out-of-the-ordinary workspaces one gets a glimpse at when visiting Google’s  office.

15. IT Park for Google.Inc 15 An open plan and other design features (e.g., high-traffic staircases) that encourage accidental interactions. More common areas than are strictly necessary—multiple cafeterias, other places to read and work that encourage workers to leave confined offices. Emphasis on areas that hold two or more people, rather than single-occupancy offices. Purpose-free generic “thinking” areas in open-plan spaces, which encourage workers to do their thinking in the presence of other people, rather than alone . The belief is that people working in spaces decorated with plants and pictures are 17 per cent more productive than those working in lean (bare and functional) offices.

16. 4. Service Details and their location. a) Parking: Both Surface Parking and Basement Parking. Provision for Disabled Parking. Number of parking provided :is 30, it is adequate as maximum googlers come via Cabs. The vehicular Circulation takes place through the periphery of the IT park. Mechanical ventilation system for basement parking. Total parking Space are for 529 ECS for basement and Surface . The Google office has a single level basement for vehicles They have built a green transportation system that includes LPG Cabs . Every day, their Cabs keep thousands of Googlers out of the driver's seat and reduce our impact on the environment. c) Landscape: Outside sit out area and naturally blended sit out spaces are common in every google office. The prime concern is to utilize the nature without harming them. The project proponent constructed Rainwater Harvesting Pits @1/acre. Figure 17: Recreational Park at the frontage • 20% of the total plot area is to be used for plantation. The entire plot periphery has been planted so as to ensure limited visual and noise barrier from the expressway. d) Air-conditioning system: A chilled beam heating, ventilation, and cooling (HVAC) system that uses significantly less energy to regulate building temperature while also occupying less space than conventional equipment is used. They have brought the facility overhead energy usage down from 1.4 to 0.5 per watt of IT computer energy, reducing it to a third of its original value. They managed to do this without any operational disruptions or causing any major temperature fluctuations within their POP. The list of changes they made to the original space is fairly short: 14 IT Park for Google.Inc 16

17. • Added temperature monitoring • Optimized air vent tiles • Increased temperature and relative humidity settings on CRACs • . Blocked off the ends of cold aisles with curtains • Put blanking plates and side panels to block cold air passing through empty rack spaces 6. Added 48” extensions to all CRAC air returns • Added a new CRAC controller Using computer modeling to analyze the airflow for their final setup, one can see a fairly efficient network room with far more air flowing through machines instead of bypassing them . The building also has a solar operated heating system as recommended by HAREDA in each tower IT Park for Google.Inc 17

18. IT Park for Google.Inc 18 d) Water Supply: Total fresh water requirement is 173 cu. m . The requirement is fulfilled by Ground Water Supply with its main Store planted at the rear. e) Sewerage system: Capacity of the STP is 150 cubic metres . Disposal done as per the Solid Waste Management and Handling Rules. • Seperation of Grey and Black water by Dual Plumbing Line. Treatment of grey water by 100%decentralized treatment such that the recycled water has the max. BOD of 10 ppm and the recycled water is used for gardening, flushing DG set cooling, running of water fountain etc. • Solid waste generated is collected and segregated. It is decomposed far off from the site at utilized as compost after degradation. • Weep holes in the front compound walls are provided so as to ensure proper rain water drainage into the catchment area during monsoon period. f) Fire protection: The building has BMS and Control System monitoring the principal operations of the building, and fully integrated with the security, fire alarm, and lift operating system. g) Electric Power: Total power requirement is 1187 Kwh which is supplied by DHBVN. The diesel required for the functioning of the DG set is stored in the underground tanks. • The bore well of the rain water is kept atleast 5 m. above the ground level.

19. This is a project of ministry of environment and forests for construction of new office building at New Delhi. The basic design concept of The project is to make the net zero energy green building. • Plot area: 9565sq m • Maximum ground coverage:30 % • F.A.R: 2 • Height :35m (19088 sq. m. - superstructure & 11826 sq. m. – Basement ) • Year of completion : 2013 Vertical Rise : Ground + 6 and other of Ground + 7 I . General Information of the building T otal Plinth Area: 30914 sqm c ) Salient Features : The Building is planned to be a state of the art landmark building, with emphasis on conservation of natural areas and trees to reduce adverse environmental impact, provide adequate natural light, shaded landscaped areas to reduce ambient temperature, maximize energy saving system. Aims to minimize operation cost by adopting green building concepts, conservation and optimization of water requirement including reuse of water by recycling the waste water. The building is designed friendly to physically challenged . b ) Building Specification : Revised cost of the project : Rs . 201.49  a) Objective : To study a low rise office building campus with respect to its space planning and energy efficient technologies. Setbacks : 9m,6m,6m,6m CASE STUDY II -Indira Parivahan Bhawan , New Delhi

20. • The plot is easily approachable from aurobindo marg and lodhi road. • A metro station " jorbagh " is at walkable distance of about 300m from this place. d) Location and Accessibility : e) Surrounding Land Use and Urban Character : • The site is surrounded on east by NDMC housing and 15m. Row, on west by 12m row and on north lodhi colony and 12m. Row, on south gpra colony of aliganj .

21. II. Planning , Circulation and Functions • Wider Front Setback (22m) to protect front tree line Preserve the integrity of the green street • Preservation of the local ecology, Tree Cutting approvals for 46, but only 19 cut. - 11 Trees Transplanted - Excavated Soil reutilized at other construction sites and the Zoo •The IPB office building for the ministry of environment and forests has been planned in 2 parallel blocks facing the N-S direction. A large linear open court is in the centre. The Building blocks create a porous block Form to optimize air movement throughout the site and the N-S orientation allows for optimum solar access and shading. This building reflects the growing role of the ministry in regulating and channelizing India’s development into a sustainable paradigm. The mandate was carried forward by the Central Public Works Department (CPWD ) and the sustainable design consultants, Deependra Prashad , Architects and Planners (DPAP )

22. • Effective ventilation by orientating the building e-w and by optimum Integration with nature by separating out different blocks with connecting corridors and a huge central court yard . E W N Plan developed for direct pedestrian axis to East, North and West Entrance Without crisscrossing vehicles Design of the Superstructure : a) Office space for 600 employees i/c 3 Ministers b) Auditorium 125 seating capacity c) Committee rooms and conference rooms ( 7 Nos ) d) Roof garden ,Gymnasium and Yoga room for recreation e) Cafeteria , Kitchen and executive dining hall Fig: Central Biome Fig: Building Pores Fig: Access Routes

23. Utilizing lessons from nature & traditional buildings Natural ventilation due to stack effect - Maximum Ground Coverage Used (30%) to keep building height comparable to the surroundings - Respecting the Eco-logic of the site. Building Punctures & jalis to Aid Cross Ventilation and maximizing non - conditioned spaces like lobbies, passages, service areas

24. (GRIHA POINTS) SITE PLANNING NO. CRITERION POINTS 1 Site selection 1 2 Preserve and protect landscape during construction 5 3 Soil conservation (till post-construction) 2 4 Design to include existing site features 4 5 Reduce hard paving on-site and/or provide shaded 2 hard-paved surfaces 6 Enhance outdoor lighting system efficiency and 3 use renewable energy system for meeting outdoor lighting requirements 7 Plan utilities efficiently and optimize on-site 3 circulation efficiency SOURCE: GRIHA WEBSITE

25. Site Plan (CPWD)

26. Developing the Plan - Lower Basement OFFICE RECREATION CIRCULATION SERVICES STP AUTOMATED CAR PARK SERVICE LOBBY AC PLANT ROOM ESS PANEL ROOM AUTOMATED CAR PARK N - Automated Parking with 19sqm/car instead of 35sqm/car in manual parking

27. Developing the Plan - Upper Basement WATER TANKS OFFICE RECREATION AHU ROOM DG/UPS ROOM CIRCULATION SERVICES PARKING DRIVER ROOM CAR LIFT VOID FOR SERVICE AREA SCOOTER PARKING Zero tolerance to surface parking to reduce heat island First Basement Parking with Automated parking Below. Helps reduce volume of parking / excavation / embodied energy of structure N

28. Developing the Plan - Ground Floor OFFICE RECREATION CAFETERIA CIRCULATION SERVICES AUDITORIUM P opulated by Common and Public facilities which are comfortable with limited natural light. LANDSCAPE AREA EXHIBITION AREA N The Courtyard also helps in air movement besides being a shaded interaction space

29. Developing the Plan – First, Second Floor OFFICE Conference Room Conference Room RECREATION CIRCULATION SERVICES N Keeping Service Areas, Staircases on low light areas. Efficient Usage of the perimeter to maximize sunlit areas and views for the users

30. Developing the Plan – Third, Fourth, Fifth, Sixth Floor OFFICE RECREATION CIRCULATION SERVICES CROSSOVER BRIDGE N

31. Developing the Plan - Seventh Floor OFFICE RECREATION TERRACE OPEN GREEN TERRACE CIRCULATION SERVICES N

32. Elevations - North Superstructure = 19,088 sqm Basement Area = 11,826 sqm Total Area = 30,914 sqm

33. III. Construction System and Building Materials •Stone available in nearby area for flooring •Terrazzo flooring with locally available stone materials. •Fly ash brick. •AAC blocks. •Jute bamboo composite for door frames & shutters. •UPVC windows with hermetically sealed double using low heat transmittance index glass. •Use of high reflectance terrace tiles for low heat ingress. •Avoided aluminum as it has high embedded energy •Sandstone Jalis. • Stone and Ferrocement Jalis Fig: Brown and beige coloured stone jaalis covering the vertical movement cores, thus eliminating the need to air condition these spaces. The Building is a RCC framed structure with M-25 concrete mixture Utilization of fly-ash in building structure- Ready Mix Concrete with PPC having more than 30% fly ash content. Reduce volume, weight, and construction time by adopting efficient technologies (such as pre-cast systems). On site renewable energy system with solar photovoltaic cells to meet total energy demand. Fly ash = 40 %

34. •Bamboo Jute Composite Doors and frames & flooring • High Efficiency Glass, high VLT, low SHGC & Low U-value, •Optimized by shading • Light Shelves for bringing in diffused sunlight •Use of material available having Recycled content Building Design Components Materials Fig: Waffle Slab Dome Fig: Skin Section of fenestration

35. BUILDING PLANNING AND CONSTRUCTION STAGE (GRIHA POINTS) NO. CRITERION POINTS 10 Reduce landscape water requirement 3 11 Reduce water use in the building 2 12 Efficient water use during construction 1 13 Optimize building design to reduce conventional 8 energy demand 14 Optimize energy performance of building within 16 specified comfort limits 15 Utilization of fly-ash in building structure 6 16 Reduce volume, weight, and construction time by 4 adopting efficient technologies (such as pre-cast systems) SOURCE: GRIHA WEBSITE

36. IV. Service Details : b) Water Resource Management : •Drip irrigation •Use of native species of shrubs and trees having low water demand in landscaping •Low lawn area so as to reduce water demand. •Reuse of treated water for irrigation The water need of the building has been reduces by: - •Low discharge fixtures •Dual Flushing cistern •Waste water treatment •Reuse of treated water for irrigation and cooling towers for HVAC •Rain water harvesting Efficient water use during construction- •Use of curing compound a) Parking : Three level underground parking is provided for 344 numbers of cars. It is state of art mechanized parking to cater concentrated peak load during office hours Another major design intervention was zero tolerance to surface parking as planned by the design team. A state- of-the-art three level parking is provided to cater to peak load during office hours with preferred parking for CNG/electric vehicles and carpools. The parking itself has been planned as a compact robotic parking, which due to efficient usage of space, accommodates the required cars within three storeys , as compared to the six basement storeys provided in usual basements. Fig; Preservation of existing foliage by increasing the front Setback. •The surface Ground water table of the site was 9 m.The construction pit was dewatered and stored around 250 m faroff from the site and thereby supplied again to the DMC water tanks.

37. Site and Water Mgmt Strategies Appropriate Shading from Summer Sun, while allowing in winter sun 60% reduction in water usage

38. The decision of creating minimum paved surface area for pedestrians by the client and the architect has resulted in less paved area on the site, wherein grass pavers have been provided all around . Instead of the usual concrete grass pavers, a large number of polymer plastic grids have been provided, which make the surface completely soft, resulting in the reduced surface run-off and increasing water percolation. Another tangible benefit of less paved area is a lower contribution of the building to the Urban Heat Island (UHI) effect . The UHI effect leads to an overall build up of temperatures in highly urbanized/concretized areas by the absorption and reradiating of solar heat on Hard surfaces. c ) Landscaping : Fig: Polymer plastic grids turn the usual asphalt fire tender road into a soft paved space More than 50% area outside the building is soft. with plantation and grassing. • Circulation roads and pathways soft with grass paver blocks. to enable ground water recharge .

39. Chilled Water Return Pipe (½” dia.) Chilled Water Supply Pipe (½” dia.) Drain Pipe (¾” dia.) Flexible Duct (6 Inch dia.) Chilled Beam Supply Air Induce d Air d) HVAC Systems : In the IPB project Chilled Beams are being installed in second floor to sixth floor. Chilled Beam Water in Temperature is 16 ° C and water out temperature is 20 ° C. Room temperature maintained is 26 ±1 ° C . Chilled Beams with Drain pan are used to drain out water droplets due to condensation during monsoon. 160 TR(Thermal Runaway) of air conditioning load of the Building is met through Chilled Beam system. Chilled Beams

40. Active Chilled Beams Working Principle Supply air flows through nozzles in small air jets which induce room air to flow around the coil & air gets cooled. Design and Operational advantages • Reduces power consumption • Easy Installation • No noise as no moving parts • Easy Air balancing activity • No filters maintenance • Save architectural space height

41. Geothermal heat exchange • • • • • • • There are 180 vertical bores at the Depth of 80 meter all along the Building Premises. Minimum 3 meter distance is maintained between any two bores. Each bore is lowered with HDPE pipe U-loop (32mm outer Dia.) and grouted with Bentonite Slurry. Each U-Loop is connected to MS Header Pipe(100mm Dia.)which finally joins the Condenser Water Line in Plant Room. Condenser hot water is sent at 100°F(37.8° C) & back at90 F (32.2° C). One U-Loop has 0.9 TR Heat Rejection capacity, so all together 160 TR of Heat rejection is obtained without using a cooling tower. Enormous water saving since no make up water is required. Saves cooling tower fan energy.

42. Toward an Energy Positive Approach OFFICE RECREATION CIRCULATION SERVICES N Provision of Solar Photovoltaics for Net Zero requirement also Shades the Roof

43. Towards an Energy Positive Approach S N Photovoltaics Stepping towards the south side creating a strong agenda for the future for urban buildings on limited site areas

44. Energy Conservation Measures RCC LIGHTSHELF WITH REFLECTIVE SURFACE

45. Changing Expectations in Thermal Comfort Basic level of comfort levels Highly controlled temperatures which many of us are used to in climate can reduce to the extremely cold. appropriate clothing Clothing - Heavy Business wear Executive Decision for the Setpoint temperature for summers set to 26 degC & Winters at 19 degC

46. Achievements: 40% savings in energy Zero electricity billing 55% savings in water Zero net disharge Largest roof top solar Power system in any Multistoreyed building (930kwp) First in government sector targeted for both ratings of green building (5star griha leed India PLATINUM Energy Accomplishments:

47. Annual Energy Production & Consumption (KWh) 160 140 120 100 80 60 40 20 ( Mwh ) Electricity Monthly Production Electricity Monthly Consumption

48. Net Zero Design IPB reduces energy requirement by 67% overall vis-à-vis conventional N-S Orientation - Limiting WWR - Insulation on wall & roof- Extensive Greenery to reduce heat load Maximizing Day lighting to reduce lighting loads Extremely Low Lighting Power Density - 5w/sqm Planning to Minimize AC loads (Keeping open atrium for cross ventilation, Non conditioned lobbies) Efficient HVAC with Screw Chillers , VFD’s, Chilled Beams Ground based heat exchange for Condenser Water Remote Computing - thin client servers Energy efficient appliances (5 star BEE) …. SPV’s for the remaining load

49. Optimize building design to reduce conventional energy demand.- • Energy efficient light fittings to reduce energy demand • Part condenser water heat rejection by geothermal mechanism. This will also help in water conservation in cooling towers for HVAC system • Variable chilled water pumping system through VFD • Pre cooling of fresh air from toilet exhaust air through sensible & latent heat energy recovery wheel • Entire hot water generation through solar panels. • Maximum daylighting • Regenerative lifts. • Use of lux level sensor to optimize operation of artificial lighting. • Solar powered external lighting.

50. THANK YOU