DOE enforces the energy and water conservation regulations established by the Office of Energy Efficiency and Renewable Energy, Appliance Standards Program to ensure that residential, commercial and industrial equipment deliver the energy and cost savings required by law.  Manufacturers (including importers) are required to certify that the products distributed in the U.S. comply with the energy and water conservation standards.  The enforcement office reviews manufacturers’ compliance with certification requirements.  This program ensures that manufacturers provide the government with information demonstrating compliance with United States law.