The demand for comfort in buildings is growing rapidly, and so is the consumption of energy for indoor climate control. Aware of these problems, EU Member States have established a regulatory framework to ensure that these needs do not lead to a significant increase in the Union’s energy consumption. In this regard, Directive 2012/27 on energy efficiency and Directive 2010/31 on the energy performance of buildings provide for the progressive improvement of the energy performance of buildings in the civil sector until the desired goal of almost zero fossil fuel consumption is achieved. In Italy, Legislative Decree no. 28 of 3 March 2011 on the “Promotion of the use of energy from renewable sources” stipulates that in new buildings or those undergoing major renovation, the thermal energy production systems (hot water, heating, cooling) must be designed to ensure that a certain percentage of energy requirements is met by using energy from renewable sources. These percentages increase according to the year in which the building was constructed (20% until the end of 2013, 35% until the end of 2016, 50% thereafter) and may therefore become increasingly problematic to meet, especially in areas where cooling is the predominant demand, even in buildings with reduced energy requirements. Among the options available to meet the regulatory objectives, heat pumps and solar cooling systems will play a fundamental role; therefore, in relation to this reference framework, the project reports the first results of two experimental projects, still in progress, involving the use of the two aforementioned RES technologies.