The return and supply pipes (headers) they are perforated with expansion outwards, for the ultimate fit heat absorption pipes (manifolds) and avoiding the pressure drop in the collectors.
Distance between tubes (tube pitch) = 107mm (EN 1652).
Single surface absorber which covers the entire surface of the window as well as the supply and return pipes, increasing the absorbent capacity of the collector. Welding is done with state-of-the-art robotic technology equipment laser.

Special safety glass (Tempered) high permeability and strength, resistant to adverse weather conditions (e.g. hail, extreme temperature changes).
Glass insulating rubber EPDM with UV protection.