Class of loss sets the equipment
IICRC S500 groups losses into Class 1 to 4 by how much water the materials absorbed. Class 1 is a small area with little absorption; Class 4 is hardwood, plaster or concrete holding water deep inside. The class sets how many air movers and how much dehumidification each room needs.
Working against humid air
Summer air here is humid, which slows evaporation. The drying team closes the house up and lets LGR dehumidifiers pull moisture out of the air faster than it comes in. Dense materials and cool lower levels sometimes get a desiccant dehumidifier, which works well in cooler, wetter conditions.
When it is actually dry
Every day, wet materials are checked against a dry reference in the same house, and temperature and humidity are logged. Equipment comes out when the readings fall within 2 to 4 points of the reference. The EPA explains why indoor humidity matters, and OSHA covers safety during water cleanup.



