Year-Round Comfort Save space and money while enjoying a comfortable room in all seasons by using this 4-in-1 unit. Create cooling in summer and cozy warmth in winter while controlling humidity and blowing fresh air in spring and autumn. Easy to Move The four caster wheels increase the mobility of this air conditioner so you can easily move it from room to room wherever you need to stay comfortable Although it has two handles, you shouldn’t need to lift this heavy unit very often. Convenient Water Drainage A built-in self-evaporation system uses the collected condensed water to improve the cooling performance instead of draining it away.