Keep cool where you work and play with a Mason & Deck portable evaporative air cooler. Evaporative air cooling is an energy-efficient technology that works most effectively in hot, dry climates. An indoor/outdoor portable evaporative cooler is an ideal cooling alternative for spaces not suited for air conditioning, such as garages, workshops, warehouses, backyard decks, and outdoor patios. Equipped with a jumbo water tank, a continuous water hookup option, and swinging louvers, this workhorse pumps out a nonstop breeze to keep you cool and comfortable. Mason & Deck constructs durable appliances for the most rugged settings.