As of 2008, commercial buildings consumed roughly 20% of energy used in the US. It is expected that by 2035 commercial building floor space will increase 54% over 2003 levels, accounting for 110.5 billion ft_ of conditioned space. According to recent studies published by the Mckinsey Global Institute, "there are viable opportunities for energy improvements that could keep global energy demand growth at less than 1% per annum." Efficiency improves bottom line as a means of staying relevant, many businesses are capitalizing on grants, incentives, and private funding to increase their operation efficiency. Energy efficiency measures are financially supported by the federal government, state utilities, and state government. Energy conservation measures have a fast return on investment (3-7 years in many circumstances)
The biggest energy uses for most commercial buildings are lighting and indoor climate control (in excess of 50% of the energy load), both of which are excellent candidates for efficiency measures that return on investment. According to the Rocky Mountain Institute: "there are abundant opportunities to save 70 - 90% of the energy and cost for lighting, fan, and pump systems: 50% for electric motors, and 60% in areas of heating, cooling, o_ce equipment and appliances".