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Dr. Sonal Desai
12th Oct 2021
This blog is about ECBC compliance applied for building energy conservation. The government of India has launched Energy Conservation Building Code (ECBC) to address energy efficiency in the commercial building sector in the year 2007. As per Energy Conservation Building Code (ECBC) – 2007, all buildings or building complexes with a connected load of 100 kW or greater, or a contract demand of 120 kVA or more significant and used for commercial purposes, falls under this compliance (both government and private buildings). In addition, the ECBC amendment launched provides two additional sets of incremental requirements for buildings to achieve enhanced levels of energy efficiency beyond the minimum requirements.
ECBC aims to meet minimum requirements for energy-efficient design and construction of buildings and their systems without compromising the comfort of the occupants. The code does not apply to Equipment and portions of building systems that use energy primarily for manufacturing processes.
In the 2017 revision, two more levels of compliances were added, and now there are three tiers of energy performance by building as following -
ECBC (requires 25% less energy than typical building)
ECBC+ (requires 35% less energy than typical building)
Super ECBC (requires 50% less energy than typical building)
The building shall comply with all mandatory requirements irrespective of compliance path, and there are three different paths to meet the compliance -
Prescriptive method
Building Envelope Trade-off method
Whole building performance method
To comply with the code, buildings shall have an Energy performance index ratio of less than or equal to one and meet all mandatory requirements.
The energy performance index ratio is the total energy consumed in a building over a year divided by total built-up area in kWh/sq m and is a handy parameter to calculate possible energy saving in buildings. It is considered the most straightforward and most relevant indicator for qualifying a building as energy-efficient or not. Most commercial buildings in India generally have EPI between 200-400kWh/m2/year.
Following the whole building performance approach, a building shall show compliance through a whole building energy simulation software that BEE has approved. To know further about ECBC compliance method and Energy modeling of building register for courses at Ergo E-Learning.
Dr. Sonal Desai
✓ Certified Energy Auditor and Green Building Consultant