Above is the United States Department of Energy treemap of energy consumption data in the U.S as of 2010[33]. This figure is beneficial because you can conceptually see the magnitude of where energy goes within each one of the four main categories: transportation, residential, commercial, and industrial.
Industrial processes make up the most of where energy goes at 32 percent. Manufacturing, chemicals, and feedstocks form the bulk of these processes.
The next highest is transportation at 29 percent, which is expected. Cars and trucks have a great significance in America in meeting our daily needs. Therefore, it is expected that gasoline and diesel make up almost all of the transportation energy usage.
Next, it is interesting to see that the residential sector uses slightly more energy than the commercial sector. Heating, air conditioning, and water heating contain the highest energy among this category. This is why there is a strong emphasis put on making HVAC systems more efficient. If these systems become highly efficient, energy usage in the U.S can drop significantly.
The commercial sector out of the four main categories is the lowest in energy usage at 18 percent. Lighting proves to be the highest energy guzzler from this sector, followed by HVAC.
