These residential ducted evaporative coolers have multiple inlets to draw in air for cooling. Their slim media fits at the inlets to provide a sufficient wet surface area for cooling warm air drawn into the cooler. They're typically used to replace multiple-inlet coolers in older installations.Residential ducted evaporative coolers connect to ductwork to distribute cool air throughout a home. They use wet media (evaporative pads) to produce cool, humidified air at airflows of less than 7500 cfm for residential cooling. These coolers are commonly used as replacements for existing single- or multiple-inlet coolers. Ducted Evaporative Cooler, 3100cfm, 1/3 HP