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Austin's Adoption of ASHRAE S.P. #41 into the Local Energy Code
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The City of Austin amended the local Energy Code in December 1984 to incorporate the principal recommendations of ASHRAE Standard Project #41. Revisions to the Code were recommended by a special Task Force appointed by the City Council; Task Force members represented major elements of the construction industry and local community. The Code revisions were reviewed and supported by numerous local City boards and commissions after nearly a year's work by the Task Force. Principal changes effecting commercial construction involved deleting OTTV criteria and adding three new criteria: 1. Wall heating criteria 2. Wall cooling criteria 3. Peak cooling criteria The new envelope criteria makes adjustments for building geometry, orientation, shading, insulation, lighting power and controls. A performance index encourages good design by increased awareness of what factors make a difference, The new lighting code methodology is based upon specified watts per square foot for different tasks and gives credit for ceiling height and room size. Cooling equipment efficiencies were increased by 5 to 15%. Pipe and tank insulation Levels were raised and a variety of minor control modifications were added. This paper discusses the code changes related to commercial building envelopes and lighting s-system.
Hart, M. N.; Holder, L.M. (1985). Austin's Adoption of ASHRAE S.P. #41 into the Local Energy Code. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from