Turbulator with offset louvers and method of making same

A method of making a heat exchanger comprising the steps of:

• providing a plurality of tubes;
• providing a generally planar strip having a base extending laterally and longitudinally;
• forming a plurality of turbulators each having a plurality of corrugated fins with a plurality of louvers spaced laterally and extending generally perpendicular in an alternating manner such that the louvers extend in a direction parallel to a longitudinal axis of the strip;
• disposing the turbulator in the tube;
• and
• brazing the tube and the turbulator together.

A heat exchanger comprising:

• a first manifold;
• a second manifold spaced from and opposing said first manifold;
• a plurality of tubes extending laterally between and in fluid communication with said first manifold and said second manifold;
• and
• a plurality of turbulators, each of said turbulators having a plurality of louvers spaced laterally and extending longitudinally in an alternating manner, said louvers being rolled in a direction parallel to a longitudinal axis thereof, one of said turbulators being disposed in one of said tubes.