How Stonington Schools Built a More Efficient Energy Strategy

The Challenge

Stonington Public Schools in Connecticut manages multiple school buildings with diverse heating, cooling, and ventilation needs. Aging equipment, seasonal inefficiencies, and limited visibility into persistent HVAC faults made it difficult for facility staff to optimize energy use without compromising comfort. Though the facilities staff were skilled at operating their control system, daily demands left little time to evaluate how equipment performed overnight or across seasons. In particular, schools often run systems unnecessarily during unoccupied summer months, adding avoidable costs. The district’s challenges: how to modernize operations, save energy, and stretch budgets while creating a healthier, more efficient learning environment.

The Solution

Edo partnered with Stonington Schools and Eversource to improve visibility into system performance and prioritize cost-effective efficiency strategies. Together, we implemented measures that provide both immediate savings and a foundation for long-term sustainability:

• Real-Time Monitoring & Analytics – Edo’s platform continuously tracks HVAC performance, offering fault detection, dashboards, and interval data to guide smarter maintenance. Edo’s analytics and engineering team delivered a clear, prioritized list of measures, enabling staff to focus on solutions instead of searching for issues.

• Summer Optimization Strategy – Cooling setpoints and fresh air intake were adjusted during unoccupied periods, cutting energy consumption while maintaining healthy indoor conditions.

• Collaborative Partnership – Regular check-ins with Stonington to ensure alignment of efficiency goals with day-to-day operations.

• Energy Upgrades – The district piloted new variable frequency drives, lighting upgrades, and energy management systems programming updates at three schools, supported by incentives issued through Eversource.

The Results

Stonington achieved measurable financial and operational benefits:

Conslusion

Through data-driven monitoring, efficiency upgrades, and close collaboration, Stonington Schools transformed its facilities. It turned its buildings from reactive energy users into proactive managers of performance and cost. With Edo’s platform, the district is lowering bills, improving comfort, and building a resilient energy strategy. Both students and the community are realizing benefits.

“Edo has been a valuable partner. Their insights and recommendations have been instrumental in advancing our efficiency efforts.”

Stephen Carroll, Director of Facilities & Operations, Stonington Schools