The evaporative straw or pine filter is located in the tray, external air is pulled through the moistened straw causing evaporation over a large surface area resulting in the cooling of the passing air which is delivered to the internal vents. It also filters out dust, insects, and acts as a humidifier in very low humidity environments.

We recommend replacing this filter every 12 months.

More information can be found in the maintenance section of the owner’s manual.