LEEDTM Energy Analysis

DOE-2 Energy Modeling Summary - Office Building

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F. LEEDTM ENERGY ANALYSIS

A LEED reference case was developed to determine the number of credits earned by the

Baseline GSA buildings

SUMMARY OF DIFFERENCES BETWEEN BASELINE CASE AND LEEDTM REFERENCE CASE

GSA Baseline

LEED Reference Case (ASHRAE 90.1)

Windows - Full Facade Renovation Only:

Windows - Full Facade Renovation Only:

All Floors

Floors 1 & 2:

C 1" Insulating glass (2 - 1/4" panes with

" air space), low-E

C Ucenter of glass

0.32

C Visible transmittance

57%

C Shading coefficient

0.35

C With thermally broken aluminum frame

C Ufenestration

0.43

Floors 3-9:

C Shading coefficient

0.45

C Visible transmittance

78%

C Ufenestation

0.57

Windows - Minimal Facade Renovation

Only:

All Floors

C 1" Insulating glass (2 - 1/4" panes with

" air space), low-E

C Ucenter of glass

0.32

C Visible transmittance

57%

C Shading coefficient

0.35

C With thermally broken aluminum frame

C Ufenestration

0.43

APPENDIX J - GSA LEED COST STUDY