REGEA is a regional energy and climate agency and recognized a center of knowledge and excellence with references and projects throughout the European Union, It was established on April 1, 2008 as a joint venture by the City of Zagreb, Krapina-Zagorje County, Karovac County and Zagreb County through the program Intelligent Energy-Europe. The foundation of REGEA started from the desire to do better and more on the field of enery and climate.

Since its establishment, REGEA has participated as either coordinator or partner in more than 50 different EU-funded projects through various programmes, but the core of business can also be defined as follows:

• Support in the development and implementation of national, regional, and local investment projects in the field of energy (eg. energy renovation and construction of buildings)
• Development of long-term strategies, energy efficiency programs and action plans (eg. national strategies, SMART City strategies, SEAPs and SECAPs…)
• Development of innovative financing mechanisms for energy projects such as the Energy Performance Contract – ESCO model and Public-Private Partnership – PPP
• Preparation of study bases, technical calculations and analyzes, feasibility and pre-feasibility studies, business plans and other financial analyzes
• Construction project management, professional and technical supervision of energy audits
• Energy certification education and promotion of best practices
• Production of educational publications, implementation of promotional and crowdfunding campaigns.