Unnati Office
Greater NOIDA, Uttar Pradesh


Location Greater NOIDA
Coordinates 29° N, 78° E
Occupancy Type Office, Private
Typology New Construction
Climate Type Composite
Project Area 3,740 m2
Date of Completion 2018
Grid Connectivity Grid-connected
EPI 60 kWh/m2/yr

The Unnati Office Building is the regional headquarter (North) for Gainwell Commosales Pvt. Ltd., part of a larger 5 acre campus. It is the first building in India to be certified Platinum under LEED v4 BD+C : NC rating in 2018. The building performs 59% better than a conventional office building in the region, and 40% of the building energy consumption is met through on site renewable energy generation.

Unnati Office
Greater NOIDA, Uttar Pradesh


The three-storey building is a cuboid with a central courtyard. It is oriented northeast-southwest, with the core areas distributed in the east and the west orientations. Passive design strategies have been integrated with the building design.


The landscape is a mix of existing and new vegetation. 30% of the site is un-built, of which 25% is covered with shrubs and trees. Only native vegetation has been planted to reduce irrigation water volume as well as pump energy. Treated waste water is used for irrigation.


90% of the office spaces, including the core and service areas, receive uniformly distributed daylight. This can be attributed to the form, central courtyard, shallow floor plates, appropriate sizing and distribution of openings.  All the windows have box shading that prevents glare.


A design ventilation rate of 30% additional outdoor air over ASHRAE Standard 62.1-2010 enhances indoor air quality and occupant comfort. Passive design features reduce the total diversified AC load to 208 kW for 3740 m2 (80 tons for 33,500 ft2).

Building Envelope and Fenestration

Climatically responsive façade concepts, including green wall and shading on all windows, protect the interiors from direct sun and reduce heat gain.

All external surfaces, including the walls, roof and foundation, are insulated (using polysterene panels) on the exterior.

Truss reinforced insulated concrete panels (TRIC) used for the exterior walls are 25 mm concrete (AAC), 60 mm expanded polystyrene (EPS), and 25 mm concrete (AAC), and 10 mm plaster.

The green roof insulation materials are 13 mm extruded polystyrene insulation and a 300 mm layer of green roof soil substrate.

Window-to-wall ratio (WWR) is 30%, which helps ensure maximum daylighting potential with minimum solar heat gains.

High performance envelope insulation leads to 54% reduction in energy use (compared with the ASHRAE/ IESNA Standard 90.1-2010 baseline).

High performance double-glazed windows provide improved protection against sunlight with integrated motorized blinds and shading (efficient glazing balancing low thermal conductivity and shading coefficient).

Unnati Office
Greater NOIDA, Uttar Pradesh

Lighting Design

An energy-efficient lighting system with daylighting controls is used.

Energy-efficient fixtures and ballasts contribute to a 66% reduction in lighting energy compared to Standard 90.1-2010.

Occupancy sensors in normally unoccupied areas like storage areas, toilets and mechanical rooms minimize lighting use.

Lighting controls ensure minimum internal heat gain and reduced air-conditioning load in those spaces.

Approximately 90% of total regularly occupied spaces in the building have an illuminance level of 300-3000 lux measured on the clearest sky conditions. A lighting power density (LPD) of 3.6W/m2 in all occupied spaces is significantly lower than the Standard 90.1-2010 baseline of 10.9 W/m2.

The building uses energy-saving technologies associated with the electrical power supply system/building management system.

Optimized Energy Systems / HVAC system

The building has a hybrid HVAC system which is a combination of water-cooled air handling units and ceiling-embedded radiant cooling system.

Cooling load distribution of the system is such that 55% of the load is met by the radiant cooling system and 45% by AHUs. Total

cooling load for the project is around 90 TR for which 2# 80 TR screw chillers (1 Working + 1 Stand-by) are provided.

Based on indoor design conditions of 24°C and 55% relative humidity, the room dew-point temperature is 12°C and chilled water is supplied at a temperature 7°C to avoid any condensation on surfaces.

Indoor Air Quality

Dry outdoor ventilation air is supplied through an externally mounted unit that dehumidifies the air before it is supplied to occupied space. This dry outdoor air acts as primary air to the chilled beams.

The air quality is monitored inside the entire building with help of CO2 sensors  which provide an audible alarm

The DOAS system starts at 8 a.m. to remove moisture that builds up during unoccupied hours and brings down the temperature to desired level before office start-up.

Metering and Monitoring

Advanced energy metered systems include the main incoming power supply, chillers, internal lighting, external lighting, air-handling units, the water supply system, the sewage treatment plant and the solar PV system.


The project incorporated ASHRAE-recommended commissioning methodology, using a third-party commissioning agent and energy auditor.

Commissioning through all four phases – design, construction, acceptance, and occupancy – ensured proper implementation of the building envelope, mechanical and electrical systems.

Unnati Office
Greater NOIDA, Uttar Pradesh

The building draws 40% of its energy from the roof-top PV plant.

The installed 100 kW solar PV generates 146 MWh/yr.


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