For a small spill on a hard floor, a mop, towels, and a fan are often enough. The trouble starts when water soaks into carpet pad, drywall, or a subfloor, because household fans only move air across the surface. They cannot lower the humidity inside the room, so moisture stays trapped in materials where you cannot see it.
Professional drying attacks the moisture directly. Low grain refrigerant, or LGR, dehumidifiers pull water vapor out of the air, while air movers speed evaporation from wet materials. Technicians then use moisture meters to confirm that walls and floors have returned to a dry standard. You can estimate how long a proper dry-out takes with our drying-time calculator.