Abstract: A device for collecting rainwater and calories originating from solar radiation in order at the same time to drain the rainwater and generate domestic hot water or heating, capable of being mounted at the base of a roof or on the edge of a balcony, includes an open channel (2) having longitudinal walls and lateral walls (7, 8). The open channel (2) has in cross section a stepped profile including first and second steps. A translucent or transparent cover plate (3) is mounted inside the open channel (2) at the second step while being held by the lateral walls (7, 8) and partly delimits a sealed chamber (2b). A heat exchanger device (12) inside which a coolant can flow is mounted inside the sealed chamber (2b), and the first step defines at least partly a section for the flow of the rainwater.

Abstract: Device for collecting rainwater and heat originating from solar radiation to both drain the rainwater and generate sanitary or heating hot water, capable of being fitted at the base of a roof or on the edge of a balcony, comprising an open channel 2 having longitudinal walls and side walls 7, 8, characterized in that a translucent or transparent covering element 3 is fitted inside the open channel 2, being maintained by the side walls 7, 8 and defining inside the open channel a watertight sealed chamber 2b, in that a heat-exchanger device 12 inside which a heat-transfer fluid can circulate is fitted inside said sealed chamber 2b, and in that the translucent covering element 3 defines, with at least a part of a longitudinal wall of the channel 2, a flow section for the rainwater.