The model energy codes, in their various forms, have been at the forefront of the discussion regarding building design in recent years. These codes include the International Energy Conservation Code (IECC), which was first issued in 2000, and ASHRAE Standard 90.1, which dates back to 1974. Together, these model codes provide the basis for the state and local building codes that govern the required energy efficiency of newly constructed and altered buildings.
After reading this article, you should be able to:
+ IDENTIFY the energy codes that apply to existing buildings, and explain the challenges that arise when applying current codes to older building enclosures.
+ ANALYZE considerations for existing buildings with high percentages of vertical fenestration to address the constraints of applying trade-off methods.
+ DEFINE “sub-optimization” in terms of fragmentary and haphazard application of the energy code.
+ EXPLAIN the concept of fuzzy decision making as it applies to interpretation of the energy code.