The "Building Synergies" initiative is a comprehensive operational and energy transformation project by NOVA, aimed at drastically reducing Scope 1 & 2 emissions through the redesign of the company's building and technological infrastructure. Through the consolidation of energy-intensive facilities, the modernization of Data Centers, and the upgrade of energy infrastructure, NOVA aims to: reduce overall energy consumption, improve energy efficiency, reduce the carbon footprint, and create a more resilient and sustainable operational model. The initiative is part of the company's broader Net Zero Roadmap and is directly linked to the strategic target of a 90% reduction in Scope 1 & 2 emissions by 2030.

Employees, customers, investors, suppliers, institutional bodies, local communities, and broader society.

The initiative started in 2020 and was completed in 2024.

Project Rationale and Operational Design

NOVA proceeded with an extensive operational and energy transformation of its facilities, redesigning the operating model of its building and technological infrastructure with the aim of drastically reducing its Scope 1 & 2 carbon footprint and improving energy efficiency.

Within the framework of the company's broader digital and operational transformation, the "Building Synergies (2022–2024)" project was designed and implemented. This project was born out of the need to restructure NOVA's scattered, old, and energy-intensive building infrastructure in Attica.

The goal of the project was the transition from a fragmented facilities model to a centralized, technologically advanced, and energy-efficient building ecosystem, capable of substantially reducing electricity demand and corresponding greenhouse gas emissions.

Implementation Phases – Building Consolidation

The Building Synergies project was implemented based on a strict schedule and included the complete evacuation and decommissioning of four energy-intensive building facilities with a total surface area of over 23,212 m²:

• Kantza Building: 10,910 m² with a historical annual consumption of 3.0 GWh
• Paiania Building: 4,594 m² with an annual consumption of 1.0 GWh
• Marousi Building (Neapoleos Ave.): 4,070 m² with an annual consumption of 1.8 GWh
• Tavros Building: 3,548 m² with an annual consumption of 0.9 GWh

The consolidation of these four facilities significantly reduced the organization's energy load by 6.7 GWh annually.

Concurrently, the company's activities were relocated to two modern and energy-upgraded facilities:

• Kallithea (5,581 m²)
• Kolonos, Athens (2,518 m²)

State-of-the-art bioclimatic technologies were applied to these facilities, which include:

• LED Lighting Systems: Full replacement of old lighting fixtures with smart, low-consumption, high-efficiency LED systems.
• Upgraded HVAC Systems: Installation of new, technologically advanced heating, ventilation, and air conditioning units with high energy efficiency ratings.
• Building Management Systems (BMS): Integration of all electromechanical operations under a centralized, automated BMS system. This system allows for continuous, real-time monitoring, logging, and dynamic adjustment of lighting and air conditioning based on space occupancy and external conditions, eliminating any energy waste.

This approach:

• significantly reduced energy requirements,
• improved operational efficiency,
• limited infrastructure redundancies,
• and contributed to the creation of a more agile and sustainable operating model.

Modernization of Data Centers and Electromechanical Infrastructure

Parallel to the building consolidation, NOVA is implementing a five-year modernization program for its Data Centers and electromechanical infrastructure across 13 MSC (Mobile Switching Center) buildings.

The project includes:

• replacement of cooling systems,
• UPS upgrades,
• replacement of rectifiers and inverters,
• and overall optimization of the energy management of critical infrastructure.
• Upon full implementation of the project, the following are expected:
• annual savings of 2.53 GWh,
• and the avoidance of 721 tCO₂e.

Measurable Results and Environmental Benefit

The completion of the Building Synergies project in 2024 yielded exceptional and directly measurable results, which were externally verified under the National Climate Law and incorporated into the company's Sustainability Report.

Specifically:

• the electricity consumption of the company's buildings decreased by 11.7% in 2025 compared to the baseline year 2022,
• while a specific decrease of 8% was also recorded in 2024 compared to 2023,
• an emissions avoidance of 1,133 tCO₂e was achieved,
• the total reduction in direct energy consumption amounted to 3.7 GWh,
• while the total energy benefit of the building infrastructure reached 4.9 GWh.

This initiative tangibly demonstrates how operational and energy transformation can substantially contribute to the reduction of Scope 1 & 2 emissions in the telecommunications sector.

The initiative was implemented in collaboration with specialized technical and energy partners for the design and implementation of energy and electromechanical upgrades.

NOVA invests in the continuous training of its staff on Sustainability, Net Zero, energy efficiency, and waste management. Digital tools are used for the monitoring and optimization of energy losses at the company's facilities.

Greece – Attica

• Building Electricity Consumption: 11.7% reduction vs. 2022 baseline; 8% reduction in 2024 vs. 2023.
• Avoided Emissions: 1,133 tCO₂e prevented from entering the atmosphere.
• Energy Load Reduction: Facility consolidation reduced organizational energy load by 6.7 GWh annually.
• Total Energy Benefit: Building infrastructure energy benefit reached 4.9 GWh; direct energy reduction: 3.7 GWh.
• Circular Economy: 84% of operational waste (322.83 tonnes) was diverted from landfill to recycling/recovery in 2024.

• Improved energy efficiency and reduced operational costs.
• Reduction in energy intensity per revenue to 157.94 MWh/€m in 2024 (vs. 167.21 in 2023).
• Enhanced resilience against energy price fluctuations.
• Full compliance with the Greek Climate Law through externally verified emissions.
• Maintenance of ISO 14001 (Environment) and ISO 50001 (Energy Management) certifications.
• Energy savings summary: buildings: −4.9 GWh | network: −9.6% | Data Centers: −2.53 GWh (upon full implementation).
• Total NOVA Group investments in 2024: €319m.
• NOVA Telecoms CAPEX 2024: €228.8m in network, infrastructure, and modernization.

"Building Synergies" demonstrates how operational transformation and energy transition can serve as key levers for achieving Net Zero targets, creating a more resilient and sustainable operational model for the telecommunications sector of the future.