Device for exchanging heat and method of manufacturing such device

A device for exchanging heat, comprising:

• one or more flow-though devices though which a fluid can flow and one or more fin-like shaped parts around which air can flow and which is joined to said one or more flow-though devices, said joint allowing exchange of heat to occur between the air and the fluid and comprising a plurality of ridges and recesses being alternately arranged along a longitudinal direction of the one or more fin-like shaped parts, wherein said ridges form reduced contact surfaces via which said one or more fin-like shaped parts are joined to said one or more flow-though devices and wherein there is no contact between said one or more fin-like shaped parts and said one or more flow-though devices in said recesses, and
• a cooler block having a plurality of said fin-like shaped parts and a plurality of said flow-through devices wherein said plurality of said flow-through devices are arranged in several parallel planes and said plurality of said fin-like shaped parts are placed in between two adjacent flow-through devices in two planes each.