Fins Shape

Fins Shape

Fin Type Characteristics Common Applications


Louvered fins increase the heat-transfer capacity by creating air turbulence which reduces the boundary layer on the fin's surface, but at a cost of increased air-pressure drop across the coil.
  • Evaporators.
  • Heaters and Coolers.
  • Condensers operating in areas with light to normal dust conditions.
  • This fin shape is for all applications with normal dust conditions.
(low and high)



Corrugated fins improve the heat transfer factor to a lower degree than louvered fins. They also have a lower resistance to air flow.
  • Used where icing or heavy-dust conditions are expected, like condensers for off road vehicles and for heavy dust application.
Sine Wave

Sine wave fins improve the heat transfer factor to a higher degree than corrugated fins. These have about the same resistance to air flow as the corrugated fins.
  • Good all purpose selection for all types of coils, provides the best output to air pressure drop ratio.
  • Default fin shape when not otherwise specified.


Flat fins reduce ice accumulation on fins. They have the lowest resistance to air flow.
  • Deep freezers.
  • Cooling / freezing systems.
  • Passive air flow systems.
Fins Density
Fins Density