How much air does an air mover move?

How much air an air mover moves is measured in CFM, or cubic feet per minute, and it varies significantly by size and type. Small personal or carpet drying air movers with 1/4 horsepower motors typically move around 1500 to 2500 CFM. Standard professional centrifugal air movers that are most commonly used for water damage restoration, which are 1/2 to 3/4 horsepower, move approximately 2500 to 4000 CFM. High-velocity large air movers with 1 horsepower or more can move 4000 to 6000 CFM or more. Axial air movers, which look like large fans in a tube, can move even more air, often 3000 to 8000 CFM, but at lower velocity and over a wider area. For comparison, a typical household box fan moves about 1500 to 2500 CFM, so a professional air mover moves roughly 2 to 3 times more air and does so at a much higher velocity and focused pattern to push air along floors and walls. The actual effective airflow depends on positioning, with air movers designed to create a laminar airflow across wet surfaces to accelerate evaporation. In restoration, the amount of air moved is critical because faster air movement increases evaporation rates and reduces drying time from days to hours when combined with dehumidifiers.