The I&M Bank Rwanda Head Office, inaugurated in early 2023, stands as Rwanda’s first existing commercial building to achieve the prestigious EDGE Advanced Certification, showcasing its commitment to environmental sustainability.
Sustainability was a cornerstone of the project from the initial design phase, with design strategies projected to deliver energy savings of 58%, water savings of 51%, and embodied energy savings of 21%. These efforts culminated in meeting the stringent criteria for EDGE Advanced certification – achieving 40% energy savings – and setting a benchmark for exceptional environmental performance in the region.
GreenA Consultant’s Involvement
As the Sustainability Consultant for the project, GreenA proposed a comprehensive mixed-solutions approach, integrating expertise in alternative green building strategies, rigorous research, and data collection.
Building Envelope
The office is designed to remain cool and well-ventilated, utilizing a combination of passive strategies and natural and mechanical ventilation tailored to the local climate. The building’s façade minimizes heat gain, reducing the reliance on air conditioning while maximizing natural daylight to illuminate indoor spaces effectively. This dual approach enhances energy efficiency and occupant comfort.
Energy Efficient Strategies
The implementation of energy-efficient systems has achieved an impressive 58% energy savings at the Head Office. Key measures include the adoption of a 200 kWp solar PV system and naturally ventilated common areas, significantly enhancing energy performance and reducing operational costs substantially, both in the short and long term.
Water Efficiency
The building’s water efficiency plan incorporates highly efficient water fittings, including water closets, faucets, kitchen sink taps, and urinals, along with a strategy to minimize potable water use. These measures have collectively achieved a significant 51% reduction in water consumption.
Low Carbon Materials
The use of locally sourced materials, including Ruliba bricks, granite, and cement, has significantly reduced the building’s carbon footprint, contributing to embodied energy savings of 21%.
