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.
Appliances and home electronics account for about 20 percent of your energy bill. Consider updating these items by shopping for ENERGY STAR qualified appliances and electronics. And, turn them off when not in use.
To save energy, match the size of your pan to the heating element on your stove.