Economise II, Second Circle, & Save Autonomously (Circle C), concerns the utilisation of energy saving systems in the housing sector, aims to improve the energy efficiency of the country’s homes by contributing to the savings of primary energy, in order to achieve the relevant national target, according to the National Energy Efficiency Action Plan. Furthermore, the planning of the Action ensures its social character by setting specific criteria concerning, inter alia, the income situation of the owners. This action concerns residences in Thessaly that will be included in the Notices of this Action.