10 CFR Part 435 Energy Efficiency Standards for the Design and Constuction of New Federal Low-Rise Residential Buildings  

This regulation establishes energy conservation performance standards for the design of new commercial, low-rise residential buildings. The standards are designed to achieve the maximum practicable improvements in energy efficiency and increases in the use of non-depletable sources of energy.

These buildings must be designed to achieve energy consumption levels that are at least 30 percent below the levels established by the referenced baseline edition of the International Energy Conservation Code (IECC), which is the national model energy code for residential buildings. The current federal standard for residential buildings is based on the 2009 IECC, effective August 10th, 2012.