Abstract A solar heating and climatisation system based on selective absorption of solar energy by a selective collector was developed at the I.A.V. (Morocco). The experimental study shows that the performance of this system depends on several parameters: the nature of the caloporter fluid, the flow of the fluid circulation, the collector's surface area and the circulation mode (opened circulation or closed circulation). The system was tested inside a greenhouse which contained a strawberry crop. A clear improvement of the performance has been achieved for an open circulation with appropriate working parameters. The experimental results showed a precocity of 13 days of the strawberry crop in comparison to a standard greenhouse.