Xiaohui Zhou, Ph.D., P.E.
Program Manager

Building energy efficiency program manager.

  • over 17 years work & research experience in commercial building HVAC systems & building controls
  • experience as design engineer, application engineer, researcher & team leader
  • involved in ASHRAE at local & national levels
  • member of ASHRAE Technical Committee TC 1.4 Control Theory &Application, TC 1.5 Computer Applications, & TC 7.5 Smart Building Systems

How can I measure how much energy my home is using?

The common unit for home energy use in the U.S. is kilowatt-hour (kWh), or British thermal unit (BTU).

Home energy use depends on many factors such as the number of occupants, home appliances and electronics,  occupancy hours, the physical building property (roof, wall, windows, basement materials), heating and cooling system design and configurations, and house location and weather.

The U.S. Department of Energy (DOE) Lawrence Berkeley National Laboratory (LBNL) has a useful tool for estimating annual home energy use.

If you know the home’s actual energy use and cost, the U.S. Environmental Protection Agency (EPA)’s Energy Star website can also assess the Home Energy Star rating.