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Summary of "Build Right the First Time: Scaling Adoption of Net-Zero Carbon Buildings in India"

Core Content

This report, Build Right the First Time: Scaling Adoption of Net-Zero Carbon Buildings in India, outlines a strategic roadmap for decarbonising India's buildings sector to align with the country's climate goals. It focuses on implementing high-impact decarbonisation measures to reduce both operational and embodied carbon emissions, while also promoting a standardised definition of net-zero carbon buildings. The report is developed by the Rocky Mountain Institute (RMI) in collaboration with the National Institute of Urban Affairs (NIUA) and is based on comprehensive analysis and stakeholder engagement.

Main Points

India's Building Sector and Climate Goals

• India's building stock is expected to more than double by 2050, with associated carbon emissions nearly quadrupling if no action is taken.
• The buildings sector currently accounts for 32% of India's total energy consumption and is projected to increase by 8% annually.
• Without proactive measures, the sector could consume over three times more energy by 2050, making it critical to adopt energy-efficient practices and technologies.

Net-Zero Carbon Building Definition

• A net-zero carbon building is defined as one that minimises GHG emissions from operational energy and refrigerants used for space cooling, and neutralises any remaining emissions through on-site or off-site offsets.
• The definition includes operational energy and embodied carbon in materials like cement and steel.
• A standardised definition is essential for consistent policy implementation, benchmarking, and guiding stakeholders toward a sustainable built environment.

High-Impact Decarbonisation Measures

The report recommends five key interventions to achieve net-zero carbon buildings:

1. Adopting cool roofs in new construction can reduce operational carbon emissions by 4%.
2. Replacing traditional fans with 5-star energy-efficient fans can lower operational emissions by 3%.
3. Ramping up super-efficient air conditioners in residential buildings can reduce operational emissions by 12%, making it the most impactful measure.
4. Using low-carbon alternatives for cement in new construction can lower embodied carbon emissions by 1.4 Gt CO₂e over 25 years.
5. Using low-carbon steel in new construction can lower embodied carbon emissions by 1.5 Gt CO₂e over 25 years.

Together, these measures could eliminate 8 Gt CO₂e of emissions between 2025 and 2050. With a 11% cost premium, they are economically viable and can be scaled with the decarbonisation of India's electricity grid.

Policy and Implementation Roadmap

• The report proposes a whole-system approach to decarbonise the buildings sector, integrating policy, technology, and behavior change.
• It outlines five key objectives for the roadmap:
  1. Establish a standardised definition of net-zero carbon buildings.
  2. Highlight the impact of the five high-impact decarbonisation measures.
  3. Quantify the potential impact and associated costs of these measures.
  4. Promote end-user behavior change to support large-scale adoption.
  5. Frame national and sub-national policy interventions to enable sector-wide uptake.

Challenges and Opportunities

• Challenges include high initial costs, limited awareness, lack of mandatory standards, and slow technological adoption.
• Opportunities include government incentives (e.g., additional FAR allowances, financial reimbursements), public-private partnerships, and growing market demand for sustainable buildings.

Behavioral Change Interventions

• A framework is proposed to change consumer behavior and choices, ensuring the adoption of energy-efficient technologies and sustainable practices.
• This involves awareness campaigns, capacity-building, and incentives for building owners and users to make informed and sustainable decisions.

Key Information

• India's annual CO₂ emissions in 2023 were 2.9 Gt CO₂e, and the proposed measures could reduce emissions by 17 Gt CO₂e by 2050 if the electricity grid is decarbonised to 90% emission intensity reduction.
• The report is based on a subset of data from the From the Ground Up report, with updated grid emission factors.
• The proposed definition of net-zero carbon buildings is tailored to the Indian context, incorporating both operational and embodied carbon emissions.

Conclusion

By adopting a unified definition and implementing the proposed high-impact decarbonisation measures, India can significantly reduce its buildings sector's carbon footprint. This approach not only supports climate goals but also enhances energy efficiency, thermal comfort, and economic viability. The roadmap includes policy, technological, and behavioral interventions to ensure widespread and effective adoption of net-zero carbon buildings.