Extreme conditions - like the 100-plus degree dog days of summer – naturally decrease the efficiency of cooling systems, which means a lot of electricity is used but less comfort is achieved. Cooling can account for 50 percent or more of customers' summer electric bills. To save energy, customers should consider setting their thermostat at 78 degrees or warmer with the fan switched to "auto" and raising it to 82 degrees or more when they're away from home. Want more? Check out these tips for your home or business.