How many air movers do I need for a Class 2 water loss?

A common S500 starting point is one air mover per room plus one for roughly every 10 to 16 linear feet of affected wall, plus one for each inset or offset. This calculator uses that method: base per area, one per 14 linear feet of perimeter, plus your offsets. It is a starting count. The certified restorer adjusts to jobsite conditions and psychrometric readings.

How is the dehumidification requirement calculated?

By the cubic-foot per class-factor field method: total affected cubic footage divided by a factor set by the water Class (100, 40, 30, or 60 for Classes 1 to 4). That yields the AHAM pints-per-day requirement, which the tool matches to in-stock LGR units.

Does this replace a certified restorer’s judgment?

No. This tool is a planning estimate based on published IICRC S500 methodology. Final equipment counts depend on materials, HVAC, containment, and the certified technician’s readings. Stampede is a distributor, not a restoration contractor. The restoration contractor makes the final determination.

A certified restoration technician in hard hat and respirator deploying an LGR dehumidifier, axial air movers, and a moisture meter across a flooded commercial interior under low light

IICRC S500 DRYING METHOD

Size the drying job before you load the truck.

Enter the loss. Get a dehumidification, air-mover, extraction, and monitoring plan matched to in-stock Stampede units, ready to quote.

How this estimate works

This tool is a planning estimate built on published IICRC S500 methodology and the field sizing method: dehumidification by the cubic-foot per class-factor calculation, air movers by the S500 linear-foot guidance. Actual equipment counts depend on materials, HVAC, containment, and the psychrometric readings taken on site. Stampede is a distributor, not a restoration contractor. The restoration contractor makes the final determination.

Water Damage