The residential buildings in the United States use more energy than commercial buildings. According to the U.S. Energy Information Administration, 40% of all energy use in the U.S. is for buildings, with 22% for residential buildings and 18% for commercial buildings. (The rest is split about evenly between transportation and industry). About half of residential energy use in the U.S. is for space conditioning.
Excerpt from the article “Adressing Residential” by Paul W. Francisco and Max H. Sherman, published in the ASHRAE Journal May 2016