Heat exchanger with heat transferring layer

A heat exchanger extending along a longitudinal axis, comprising a first conduit configured for circulating a first fluid;

• a second conduit configured for circulating a second fluid;
• and a heat transferring layer disposed between the first conduit and the second conduit, the heat transferring layer being monolithic with the second conduit, an abutting side of the heat transferring layer in contact with the first conduit to define a surface contact interface therebetween, the abutting side shaped to correspond to a shape of a surface of the first conduit in contact with the heat transferring layer, wherein an area of the surface contact interface is greater than a reference area, the reference area corresponding to an area of a reference surface contact interface between the second conduit and the first conduit if the second conduit were in direct contact with the first conduit without the heat transferring layer being present, the first conduit in heat exchange relationship with the second conduit via the heat transferring layer.