Generally, an EER of 8 or higher is considered efficient.
Higher numbers are more efficient.
The 8,000-Btu unit has an EER of 9.5 and comes with a remote control. An oscillating vent directs cool air from side to side. The unit can be installed in windows vertically or horizontally. The unit has an EER of 9.5 and four-way air flow. It has a 12-hour timer to turn it on and off automatically.