Table 2: Different types of moisture experience in inlet filtration systems [2, 23].

DescriptionLiquid Size (μm)

Humidityvapor form
Smog (more smoke than humidity)0.01 to 2
Cooling tower aerosols1 to 50
Water mist1 to 50
Clouds and fog2 to 150
Water spray (ship wake, ocean spray)10 to 500
Drizzle50 to 400
Rain400 to 1000