ENERGY STAR Room Air Conditioner
Sizing is important for room air-conditioning units. In fact, a room air conditioner that's too big for the area it is supposed to cool will perform less efficiently and less effectively than a smaller, properly sized unit.
If your air conditioner is old, consider purchasing a new, energy efficient model. ENERGY STAR qualified room air conditioners use at least 10 percent less energy than conventional models.
Look for the ENERGY STAR and EnergyGuide labels.
Buy a qualified ENERGY STAR Room Air Conditioner and get $15 off your purchase from your participating municipal utility through a mail-in rebate.
Fix leaky faucets in bathroom sink, tub, or shower. Not only can you save 10 to 20 gallons of water per day, but you can keep energy dollars for water heating from going down the drain.
Set your thermostat to 85 degrees if you're going to be away from home for several days or more.
Weather-strip around the seams of your air conditioner to provide better insulation, and reduce cooling costs.