Fresair is actively tested in high humidity climates like Florida and the cooling sensation works great, however, the evaporative process lessens at humidity levels over 80%. Even when the humidity levels are very high the fan alone provides fast-moving cooling air. Fresair delivers cold air not moisture unlike systems of the past. Our pine filter absorbs the moisture and then passes through two additional filters resulting in cool clean air, not mist. For further detailed information on performance levels in differing temperatures and relative humidity levels see below.