They are found in numerous hospitals, hotel rooms, schools, and offices. They are small air-handling units paired with chilled-water and hot-water coils, with a fan to circulate heated or chilled air.

Holmes has one of the most trusted names in air circulation, and there’s a reason why. The brand has many useful fans available in today’s market but may be best known for its excellent window fans.

Unlike window air conditioners, portable air conditioners roll easily from room to room and take only minutes to set up—no ...