The IND15000 MaxCool Pump is designed for use in 115-Volt industrial and commercial evaporative coolers rated up to 15,000 CFM of air delivery. It is UL classified for safety and features a "low level" design ensuring normal operation even if the cooler's water level drops to as low as 1/2 in. The powerful 2 coil concentric motor delivers 505 Gal. per hour at a head height of 1 ft.