There are numerous measures that may improve fuel-use efficiency and reduce energy consumption - and the accompanying cost. The office of Federal Energy Management Programs, U.S. Department of Energy (DOE), offers the following tips for federal facilities, but they are also applicable to commercial facilities as well.
Lower thermostat settings, particularly in large heated spaces during the coldest winter days. A common rule-of-thumb is that for each degree the thermostat setting can be lowered, a 3 percent reduction in fuel consumption can be achieved. Implement dress code changes to allow the use of warmer functional clothing.