DOE’s Office of Energy Efficiency and Renewable Energy issued a final rule on May 31, 2022 codifying updated energy conservation standards for manufactured housing. Manufacturers must comply with the new standards by July 1, 2025 for Tier 2 homes. Manufacturers of Tier 1 homes must comply with the standards 60 days after DOE issues enforcement procedures for those homes. According to UtilityDive, manufactured homes use 70% more energy per square foot than traditional homes, and are generally occupied by low-income households. DOE published a related notice that it planned to conduct an environmental impact statement assessing the air quality impacts of setting these standards more tightly.