The four knows to properly drying a structure: removal of standing water, evaporation through air movement, dehumidification and temperature control.
What do the four KNOWS of drying look like in a home or business?
→ Air Movement
→ Amount of Water to be Evaporated
Temperature Control. This is the most complex of the drying principles. All drying equipment works best at specific temperatures. Most dehumidifiers work best between 70 and 90 degrees. Some materials will dry more quickly when the surface temperature is 90 degrees or higher.
When a room has experienced water damage, it can often be damp and humid. Air movement involves blowing warm, dry air in and blowing the moist air out. Industrial strength air movers are used to accomplish this. As the drying process proceeds, the techs position the air movers to promote even thorough drying.
The measure of moisture the air is currently retaining at a given temperature is relative humidity (RH). It is determined by the ratio of water vapor in the air compared to the amount of water vapor the air can contain. If the RH is over 60%, drying time becomes slower due to the air’s saturation. The moisture in the air needs removing at this point. Dehumidifiers are the most effective at lowering the relative humidity.
Amount of Water to be Evaporated
The more liquid water removal there is, the less water vapor needs to be removed by dehumidifiers. Physically extracting as much water as possible from the scene is the most efficient way to remove water in a building is to physically use a vacuum to extract it.
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