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For eight years, the NABERS Sustainable Portfolios Index (SPI) has been creating a league table for property’s heavy hitters, showcasing progress across energy efficiency, decarbonisation, electrification, water, waste and Indoor Environment Quality (IEQ).
NABERS has released the 2025 edition of its Sustainable Portfolios Index (SPI), showing the best performing building portfolios across an expanded range of sectors and indicators.