Air cooler and method for operation of an air cooler

An air cooler line comprising:

• a first air cooler having a plurality of air flow conduits, each of the air flow conduits including an inlet, and a first air flow deflector extending across peripheral portions of each of the inlets and fixedly coupled to the air flow conduits and partially obstructing the inlets;
• and
• a second air cooler having a plurality of air flow conduits, each of the air flow conduits including an inlet, and a second air flow deflector extending across peripheral portions of each of the inlets and fixedly coupled to the air flow conduits and partially obstructing the inlets, the second air flow deflector differing in at least one of size and geometry than the first air flow deflector, wherein a longitudinal length of extension across the peripheral portions in the second air cooler is larger than a longitudinal length of extension across the peripheral portions in the first air cooler.