Energy and Atmosphere 1 - Optimize Energy Performance

February 13, 2008 – 8:45am

Intent:

  1. Achieve increasing levels of energy performance above the baseline in the prerequisite.
  2. Reduce environmental and economic impacts associated with building energy usage.

Implementation:

  • Methods of optimizing energy performance:
    • Reduce building footprint
    • Reduce demand
    • Provide sensors in:
      • for break rooms
      • class rooms
      • meeting/conference rooms
    • Harvest Energy
      • Building Orientation
      • Window Location
      • Natural Ventilation
    • Improve Efficiency
      • through design of HVAC, lighting, and building envelope
    • Recover Waste Energy
      • Exhaust Air Energy
      • Graywater Heat
      • Cogeneration
  • OPTION 1: WHOLE BUILDING ENERGY SIMULATION (1 to 10 points possible)
    • New Buildings:
      1. demonstrate percentage of improvement in proposed building performance rating compared to baseline performance rating per Building Performance Rating method in Appendix G in ASHRAE / IESNA 90.1 - 2004.
      2. 1 point at 10.5% improvement, then 1 additional point for each 3.5% after that. (10 points max!)
    • Existing Buildings:
      • same as new buildings, except 1 point at 3.5%, then 1 additional point for each 3.5% after that. (10 points max!)
    • For Calculations: INCLUDE ALL ENERGY COSTS
    • Compare to a baseline (model simulation)
    • Provide 4 orientation simulations for baseline modeling.
    • updated: since June 2007 - it is required that projects doing option 1 go for at least get 2 points.
  • OPTION 2: PRESCRIPTIVE COMPLIANCE PATH (4 points possible)
    • Comply with ASHRAE “Guide for Small Office Buildings” - 2004.
    • Building must be less than 20,000 SF with office occupancy
    • For Calculations: NOT energy costs, but use CLIMATE ZONE factor
  • OPTION 3: PRESCRIPTIVE COMPLIANCE PATH (1 point possible)
    • Comply with ASHRAE “Benchmark 1.1″
    • For Calculations: NOT energy costs, but use CLIMATE ZONE factor
    • updated: since June 26 2007 - projects may NO LONGER use this option

    PLEASE SEE the ERRATA SHEET for updates to this credit since the Second Edition Guide. 

Code:

  • ASHRAE / IESNA 90.1 - 2004 (option 1)
  • ASHRAE Guide for Small Office Buildings (option 2)
  • ASHRAE Benchmark 1.1 (option 3)

Submittal Phase:

  • design

Extra Credit:

  • none

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  1. 22 Responses to “Energy and Atmosphere 1 - Optimize Energy Performance”

  2. This Credit needs update:
    Option 3 is now “Prescriptive Compliance Path: Advanced buildings Core Performance by New Buildings Institute. (2-5 points)
    The Option 3 stated on this post may not be used for projects registered after June 26 2007.

    By Mohammad on Mar 31, 2008

  3. PERSPECTIVE COMPLIANCE PATH (x)
    it should be “prescriptive compliance path”.

    By kim on May 6, 2008

  4. Thanks Mohammad and Kim for your updates.

    By Pat on May 9, 2008

  5. Can someone clarify this:
    Narrow plate
    Shallow plate

    By Lilian on May 20, 2008

  6. Where is the OPTION 4?

    By QT on Jun 16, 2008

  7. Lilian,

    A narrow or shallow (floor)plate refers to the width of the floor in plan view. i.e a room that is 10′Wide and 60′Long, with glazing on the longer side allows day light to penetrate right through the entire width of the room, making it an optimal strategy for EQc8
    Hope this helps !

    By Binu on Jun 16, 2008

  8. Thanks Binu! great to know they mean the same. optimizing daylight, cross ventilation would be seem to be more on north-south axis than east-west axis. this may sound too simplistic.

    lilian

    By Lilian on Jun 16, 2008

  9. Option 3 - Prescriptive Compliance Path:
    Advanced Buildings Core Performance Guide (Section 1 and 2) - 2-5 points
    - only for buildings under 100,000 sf
    - not applicable for healthcare, warehouse, lab
    - 3 points for office, school, public assembly, and retail
    - 2 points for all other types
    - 1 additional point for every 3 strategies from Section 3 (up to 2 points maximum)

    Exemplary Performance:
    1 Point under ID - For Option 1 only.
    New buildings 45.5%, Existing Buildings 38.5%

    By David on Jun 26, 2008

  10. Can’t you get an ID credit if you have a 45.5% performance improvement?

    By Zak on Jun 30, 2008

  11. About the June 2007 points change- it sounds like this only affects projects going for this credit. However, on the USGBC website (Right under Project Registration), it says ‘All newly registered LEED projects are required to achieve at least two (2) Optimize Energy Performance points. This requirement is mandatory for all LEED projects registering after June 26, 2007.’ Does this mean that it is a prerequisite?

    By Mitchell on Jul 1, 2008

  12. Zak,

    You are correct, projects do receieve 1 Exemplary Performance credit for a 45.5% performance improvement. I am actually in the process of writing a post that describe all of the the changes to the reference guide since the first edition. It should come shortly. Thank you for your attention to detail =)

    Mitchell,

    To clarify your concern, if project teams opt to choose option 1, then it is required to get 2 points minimum. In that sense, it’s a “prerequisite” or requirement for option 1, but in the sense of a “LEED prerequisite” (a mandatory requirement in order to become certified, where if the project did not satisfy the requirement, it would not be qualified for LEED)(i.e. SSc1), it is not. This is, at least, what I thought, but I can see how the wording makes it seem like it’s a prerequisite. Anyone else have any thoughts?

    I hope this helps. Good luck!

    By Pat on Jul 1, 2008

  13. ID credit for 38.5% on a renovation as well.

    Pat, this credit came up in a post today in the ARE Forum. Looking at my reference manual, I came across what Mitchell was stating. At first glance I assumed that the 10.5% and 3.5% imporvements could no longer be used for new projects, thus they just needed to hit 14% or 7% to get this credit.

    But looking in the margins, it say 2 points mandatory for NC projects registered after June 26, 2007….I’m not so sure this isnt a pre-req now?

    By mikedee on Jul 8, 2008

  14. I am guessing it is just a requirement until the next version.

    By valeria on Jul 9, 2008

  15. In this new Option #3 Core Performance Guide they have pretty detailed requirements in 5 basic sections,how much do we need to remember??
    I am not sure what is important to remember
    bldg must be under 100,000 sf 2-5 pts Prescriptive to exceed Ashrae 90.1
    it looks alot like a big overlap of commissioning to me, but says you can’t count any advanced commissioning to this credit…as well as green roofs, night venting..is this minutae?

    I notice in the 5 sections they introduce, only Sections 1 and 2 are required: Process Requirements and Core Performance. Optional is: Enhanced Performance Strategies where you can choose 3 strategies and get 1pt. the list is long, but I guess you cap out at 3 pts

    they bother to put Section 4 and then say you can’t use it in LEED option 3, and then don’t even mention Section 5…Nowhere!!!

    By valeria on Jul 9, 2008

  16. just a general question about exceeding Ashrae 90.1
    Is Option 1 exceeding Ashrae 90.1 2004 and
    is Option 2 exceeding Ashrae 90.1 1999
    Is Option 3 exceeding Ashrae 90.1 2004

    think Option two is a typo?Take a look, or they just don’t update small bldgs as frequently?

    By valeria on Jul 9, 2008

  17. This Credit chapter is so long, it is very hard to understand. Pat, the information that you have provided here, is that enough to understand the credit for test?

    By Al on Jul 13, 2008

  18. Hey Al,

    I totally agree with you. The information here should be sufficient for the exam. Please make sure you read the errata sheet

    http://www.intheleed.com/leed-reference-guide-errata/

    There are a few updates that I haven’t yet updated on this actual page, but they should be easily explained on the link above.

    Hope this helps. Good luck Al.

    By Pat on Jul 13, 2008

  19. About option 2- How do they base how many points you earn? In option 1, you earn points depending on the % improvement. But option 2 says up to 4 points, but just says to comply with ASHRAE small office… So do you get either 0 points or 4 points? Can you get, say, 2 points following this option?

    By Mitchell on Jul 16, 2008

  20. the requirements for option 1 talk about a default process energy cost of 25%. can anyone explain this?

    By emily on Aug 3, 2008

  21. just a general questions regarding baseline model and design model
    1. Is Process load only including in design model, and Regulated load is including Design model & Baseline model?

    2. Is on-site rewable energy cost not including in Baseline model, but including in Design model?

    Thank you

    By joanna on Aug 14, 2008

  22. So if I understand Option 1 correctly, if I applied for a project today I would have to show a percentage increase of a min of 14% for new construction and 7% for Existing? That would qualify as 2 points for the 2 point minimum?

    By Robby on Sep 3, 2008

  23. Robby,

    Yes, you are exactly correct. =) Best of luck!

    By Pat on Sep 4, 2008

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