Choose an efficient room air conditioner

Why? In the summer, air conditioning can account for a significant portion of your home's energy bill. When you replace your old air conditioner or buy a new one, choosing an efficient, ENERGY STAR® certified unit could lower your cooling costs.
What to look for:
  • The ENERGY STAR label. Certified models are at least 10% more efficient than new standard models.
  • The right size. A unit that is too large will operate less efficiently.
  • An easy-to-clean filter. Look for a model with a filter that slides out easily.
  • A good fit. If you are choosing a window air conditioning unit, be sure it will fit snugly in the window so you don't lose precious cooled air.
  • A timer. This added feature can help you stay comfortable and avoid over-cooling.

Good to know: Current ENERGY STAR certified models are 30-40% more energy-efficient than most units sold 10 years ago – and at least 10% more efficient than new standard models. Room air conditionsers are rated with an energy efficiency ratio (EER). The higher the EER, the more efficient the unit.

Installation notes: Placing the unit in a shaded window and using a ceiling fan will save you even more. Use the materials provided to create a tight fit between the window edge and the unit.

Reminders: Remember to remove window air conditioning units in the winter to keep cold air from entering your home and to help your unit last longer.

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Save up to $10 per year

Up-front costs: $125 to $500 for most models; usually no cost difference between efficient and standard models