Accelerating the rate of airflow across a surface is the key to removing moisture's boundary layers – the region of high humidity near a wet material or surface.
When a wet area releases moisture, the boundary layer quickly becomes saturated, inhibiting further evaporation and acting as a vapor barrier. Directing high velocity dry air across the surface will sweep away this humidity-laden boundary layer and reestablish maximum evaporation rates.
Moisture is trapped under carpet is a good example. In Class* 2 and 3 water intrusions, boundary layers are present around all wet porous materials because of the fast rate of evaporation and large amount of liquid water present. To release this moisture, high velocity airflow must be directed across its surface at an aggressive rate. High velocity air disrupts and removes the boundary layer, allowing the material to dry faster.
Traditional carpet dryers can help eliminate boundary layers, but the Velo and Velo Pro airmovers with their patented concentrated airflow design deliver more uniform, aggressive airflow down and across floors for quicker drying times.
*Classes of Water Intrusions
Less than 5% of surface area affected
5 - 40% of surfaces involved
More than 40% of surface area is wet
Typically involves dense materials that have been saturated with water