A heat exchanger

A heat exchanger for heat exchange between a first fluid and a second fluid, the heat exchanger comprising:

• a first header-tank assembly;
• a second header-tank assembly,
• wherein the heat exchanger is configured for operation in an orientation in which the first header-tank assembly is substantially higher with respect to a ground level than the second header-tank assembly;
• a plurality of tubes arranged in a first stack and in a second stack,
• wherein the stacks are arranged between the first header-tank assembly and the second header-tank assembly,
• wherein the second stack is arranged downstream to the first stack with respect to a configured first fluid flow path;
• at least one fin interlaced between two adjacent tubes of each stack, wherein the fin further comprises:
• a first section configured to deflect the first fluid substantially obliquely-upwardly, and a second section configured to deflect the first fluid towards the second header-tank assembly,
• wherein the second section is arranged downstream to the first section with respect to the intended first fluid flow path, and
• a third section arranged downstream to the first section and the second section so that the second section is located substantially between the first stack and the second stack.