As the proud successor to the Pew Center on Global Climate Change, and recently named the world’s top environmental think tank, C2ES provides independent analysis and innovative solutions to the twin challenges of energy and climate change.

Commercial Building Energy Codes


Commercial Building Energy Codes establish a minimum level of energy efficiency for commercial buildings. Generally, codes specify requirements for "thermal resistance" of the building shell and windows, and minimum heating and cooling equipment efficiencies. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) standards introduced before 1999 do not meet the requirements of the federal Energy Conservation and Production Act (ECPA).

Updated: November 1st, 2011