According to the Hanoi Department of Industry and Trade, during the 2021–2025 period, the city achieved total energy savings of 705.7 kTOE, equivalent to 8.26% of total energy demand, exceeding the target by 1.26%. This is an impressive result, given that Hanoi accounts for more than 10% of the country’s total electricity consumption.

Hanoi has established a comprehensive and unified system for managing and operating energy efficiency programs. Plans, guidelines, and support mechanisms for enterprises and households have been issued promptly, helping all segments of society clearly understand their responsibilities and proactively seek and apply appropriate energy-saving solutions. The energy-saving movement has spread from factories to households. One hundred percent of administrative offices have implemented the “Green Office – Energy-Saving” model, while in schools, hundreds of thousands of students are taught about energy efficiency and conservation as part of the curriculum.

At the same time, Hanoi has conducted energy audits at nearly 200 key energy-consuming facilities, helping enterprises identify thousands of inefficiency points and subsequently improve technology, replace equipment, and reduce electricity costs by 5–20% annually. In public lighting, hundreds of thousands of outdated sodium lamps have been replaced with energy-saving LED lights combined with automated control systems, saving tens of millions of kWh each year.

Hanoi also places strong emphasis on communication and raising public awareness. Campaigns such as Earth Hour, “Energy Saving for a Green Future,” and “Energy-Saving Households” are organized regularly and attract broad public participation. During Earth Hour 2025 alone, Hanoi saved more than 204,000 kWh of electricity in one hour—equivalent to the daily electricity consumption of over 5,000 households.