Concerns related to climate change have encouraged the search for renewable and efficient technologies to be installed in plants with high energy consumption, since there would be resulting with a greater possibility of primary energy saving and emission reduction. Several studies have shown that indoor swimming pools require, in the services sector, the highest energy consumption to ensure comfort and compensate for the losses. Nevertheless nowadays there are only few totally renewable cogeneration prototypes, which operate in the low power and temperature ranges required by the pools, due to the low efficiencies achieved so far. The purpose of this thesis is to expand the information available in the scientific community through the analysis of a low-temperature and biomass-powered cogeneration prototype, innovative in the Portuguese market, proposed by the SCIVEN company, spin-off of the University of Coimbra.