Practice Exercise: Building Envelope Systems

  • R-38 Roof + 12/5: 60.9 kbtu/sf
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  • achievable through building envelope choices: 54 kbtu/sf
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All windows 30% WWR, All glass Trp LOE, Wall Construction R-38, All Window Shades 1/6

  • achievable through power & lighting choices: 41.0 kbtu/sf
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0.6 plug load, 0.3 lighting, daylighting + occ controls

  • achievable through building envelope + power & lighting choices: 33.0 kbtu/sf
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All Envelope + Power Choices

  • achievable through adding Photovoltaic panels to the mix: -7.52 kbtu/sf
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All Envelope + Power Choices + 30 yr payback, 90% PV Coverage, 20.4% PV Efficiency