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There are many installation options for an individual room unit, but the basic choice is between a removable unit installed in a window and a permanent one built into a wall. A window unit is easier to install.

The best location is a double-hung window near a wall outlet with sufficient capacity to handle the appliance. The weight of the unit is carried on the sill and held in position with brackets at a slight downward slope for proper drainage of condensation. Extensions on each side of the unit slide out to seal the opening. Before buying the air conditioner take accurate measurements of the window and buy one that will fit within these measurements. If the window also has storm windows, consider the opening of that frame and make sure the unit will fit these measurements as well. . If the room has a southern exposure, you may want a more powerful unit than determined by just the room measurements.