Installations using solar energy have negative visual impact and this discourages some potential users. The aesthetic of solar thermal collectors can be an obstacle to their development and limits the growth of the market. The integration of solar collectors in buildings allows to make them invisible from the ground. In France, the law remains rigid and promotes the appearance of the buildings to its energy aspect. Although there is a recent release, the conditions are strict, and tend, at the same time that financial aid at a maximum integration of energy components. Government guidelines are also reaffirming the priority given to the solar technologies integration into the building in order to promote friendly aesthetic solutions landscape and architecture, and position the industrial sector and artisans on a higher value added. In this paper we present a new patented concept of solar collector totally integrated into a gutter. We developed a two-dimensional thermal model using a finite difference method and we modeled the hydraulic loop. The model was implemented and the numerical results were validated from experimental data. We present also the feedback performances of this solar installation in a building located in Corsica during one-year period. Another modeled conception was simulated and performance comparisons were realized. This project is built on the objectives of contributing at the European politic on the «Building Integration of Solar Thermal Systems» (BISTS) through the COST Action «European Cooperation in Science and Technology» – TU1205.
