DESC: With 8,000 BTU, Haier's Portable Air Conditioner will comfortably cool and dry the air in a small to medium space of up to 175 square feet. With the ultra compact size and self-evaporating technology, this unit is not only convenient, but also user-friendly. Auto Evaporation evaporates and eliminates the water that is collected when cooling, water is naturally collected as part of the cooling process. Compared to some traditional portable air conditioners, in which you constantly have to empty water buckets when trying to cool a room. Haier's portable air conditioner uses R410A refrigerant that features zero ODP (Ozone Depletion Potential). This eco-friendly refrigerant has no impact on the atmospheric ozone layer, which protects us from harmful radiation and global warming. The unit is ultra compact and on casters, so it can be easily moved and placed just about anywhere. It also fits double hung sliding, and casement windows.