What is net zero energy?

A building that operates at net zero energy generates as much power as it uses.

The balance of net zero energy requires three elements:  a tight thermal envelope, very efficient mechanical systems (heat pump/s, hvac, appliances), and a roof or ground-mounted solar array (or share in a solar farm).

Building for net zero energy is good building science but it’s not rocket science. Net zero energy homes are built every day in the U.S. and around the world, but these high performance homes are rarely accessible to those with low and moderate household incomes. It’s time for more people to enjoy the benefits of living in and owning a sustainable home. 

Net zero energy homes have:

• very low or no heat and electric bills, 

• year-round comfort and consistent temperatures, 

• healthy indoor air quality,

• relatively low maintenance over time, and 

• no fossil fuel reliance and a significantly reduced carbon impact.

The Zero Energy Ready Home Program at the U.S. Department of Energy provides additional information.