What is ECBC?

Energy Conservation Building Code (ECBC), 2007 has been prepared by Ministry of Power (MoP), Government of India (GoI) in association with Bureau of Energy Efficiency (BEE) under Energy Conservation Act, 2001. This code is aimed to reduce the energy consumption and enhance the energy efficiency in the buildings.


For the compliance and implementation of ECBC, it is the responsibility of the state to amend these codes depending upon the state climatic conditions. It has been noted that those buildings which has been constructed and complied under ECBC codes has shown drastic reduction in energy consumption.


ECBC in Uttarakhand

Uttarakhand has amended ECBC code according to the climatic conditions of the state. This code has been amended with detailed study and discussion with local Architects and Scientists.

The process of designing ECBC – Uttarakhand compliant commercial buildings will include different stages that begin with the design process, obtaining a building permit, completing the compliance submittals for the construction of buildings. Administration and enforcement of ECBC –UK is carried out by the local authority having jurisdiction. The authority having jurisdiction will need to receive plans and specification that show all pertinent data and features of the building, equipment, and system. The process shall be validated and approved by UREDA (Uttarakhand Renewable Energy Development Authority).

ECBC – 2017 in Uttarakhand

·    Ministry of Power launches the new ECBC-2017 on 19th June, 2017 developed by BEE.

·    ECBC 2017 prescribes the energy performance standards for new commercial buildings to be constructed across India. It sets the parameters for builders, designers and architects to integrate renewable energy sources in building design with the inclusion of passive design strategies. The code aims to optimize energy savings with the comfort levels for occupants and prefers life cycle cost effectiveness to achieve energy neutrality in commercial buildings.

·    To implement ECBC 2017 in the state, UREDA organized a meeting among ECBC committee member of Uttarakhand on 23rd September 2017 to suggest the modifications in the existing ECBCs and building bylaws of the state.

·    As per the suggestion of ECBC expert of BEE and committee member of ECBC a document as per the guidelines of ECBC 2017 is prepared with the name of UK-ECBC 2017.

·    The prepared document UK-ECBC 2017 was already sent to the UHADA for the incorporation in the building by-laws and also shared with all the development authorities for the implementation.  


Status of ECBC in Uttarakhand till date:

·         After making changes in ECBC as per climatic conditions of state, it was approved by Bureau of Energy Efficiency BEE and submittedto Housing Department for the needful action at their end to incorporate in Building bylaws.

·         On 31-7-2019, a meeting in Secretariat, Uttarakhand  for the adoption of UKECBC-2018 (as per BEE guideline) in Uttarakhand Building Bylaws.

·         Notification of the code from Cabinet  is awaited.


Climatic zones

In ECBC-2007, India is mapped under 5 Nos. of Climatic zones where as Uttarakhand has two climatic zones cold and composite, The plains of the state i.e. Pauri, Tehri, Champawat, Haridwar, Dehradun, U.S. Nagar etc. fall under composite climate while the hills fall under cold climate.


Scope Definition

The Code is applicable to buildings or building complexes that have a connected load of 50 kW or greater or a contract demand of 60 kVA or greater or The plot area of the building is more than 500 m2 with minimum 500 m2 as built-up area (excluding basement) and are intended to be used for commercial purposes.

Buildings intended for private residential purposes only are not covered by the Code.


Flowchart of Implementation Process For ECBC  inUttarakhand

Building Systems

The provisions of this code apply to:

a)      Building envelope, 

b)      Mechanical systems & equipment, including HVAC & SHW

c)      Interior & exterior lighting, and

d)     Electrical power & motors, and renewable energy systems.


The provisions of this code do not apply to plug loads, & equipment & parts of buildings that use energy for manufacturing processes, unless otherwise specified in the Code.

Building Classification


Compliance& Approach

To comply with the Code, buildings shall have an Energy Performance Index Ratio (EPI Ratio) is less than or equal to 1.

The Energy Performance Index (EPI) of a building is its annual energy consumption in kilowatt-hours per square meter of the building. While calculating the EPI of a building, the area of unconditioned basements shall not be included. EPI can be determined by:

EPI= Annual Energy Consumption in kWhTotal builtup area (excluding unconditioned basements)


To comply with the Code, EPI value shall be rounded off to two decimal places in accordance with IS 2: 1960 'Rules for rounding off numerical values.

The EPI Ratio of a building is the ratio of the EPI of the Proposed Building to the EPI of theStandard Building:

EPI Ratio= EPI of Proposed BuildingEPI o�� Standard Building


·         Proposed Building is consistent with the actual design of the building, and complies with all the mandatory requirements of ECBC.

·         Standard Building is a standardized building that has the same building floor area, gross wall area and gross roof area as the Proposed Building, complies with the mandatory requirements



ECBC: Pathway to Future

·         “ECBC 2017 is a leap forward towards strengthening India’s capabilities to combat climate change in a sustainable manner and recommended that all new buildings and offices in the future be Super ECBC and Net Zero Energy Buildings.


·         In order for a commercial building to be considered ECBC-compliant, it needs to demonstrate minimum energy savings of 25%. Additional improvements in energy efficiency performance would enable the new buildings to achieve higher grades like ECBC Plus or Super ECBC status leading to further energy savings of 35% and 50%.


·         With adoption of ECBC 2017 for new commercial building construction throughout the country, it is estimated to achieve a 50% reduction in energy use by 2030, translating to energy savings of about 300 billion units by 2030 and peak demand reduction of over 15 GW in a year. This is equivalent to expenditure savings of Rs 35,000 crore and 250 million tonnes of carbon reduction.


·         The Bureau of Energy Efficiency (BEE) is  introduce ‘energy conservation building code’ for residential buildings to help reduce domestic consumption in some states of India and it will be introduce in Uttarakhand in upcoming 1-2 years to cover residential buildings. Besides issues of energy and economic savings, these programmes can improve air quality and health of a city.


·         A study says that India will have a total floor space of 40 billion square metres by 2050. All of this brick and mortar will entail increased use of energy in the built space. Thus, one of the key focus areas of urbanisation boils down to energy use in buildings. It is time India takes serious cognisance of issues relating to building energy efficiency and develops robust policies and standards for constructing sustainable green buildings and infrastructure


·         Although ECBC caters to only commercial buildings, its success can act as a blueprint to be replicated for residential buildings – the larger energy consumers. Green buildings can foster a market for energy efficient materials and products which can contribute to the local economy and jobs, and feed into the start-up schemes and the smart city framework.