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NORMATIVE APPENDIX D—
PERFORMANCE OPTION
FOR ENERGY EFFICIENCY


  • (This is a normative appendix and is part of this standard.)

    D1. GENERAL

    D.1.1 Performance Option Scope.
    Building projects complying with Section 7.5, the “Performance Option,” shall comply with the requirements in Normative Appendix G of ANSI/ASHRAE/IES Standard 90.1 with the following modifications and additions. When a requirement is provided in this appendix, it supersedes the requirement in ANSI/ASHRAE/ IES Standard 90.1. This appendix shall be used both for building projects demonstrating compliance with the requirements of this standard and for building projects demonstrating performance that substantially exceeds the requirements of this standard. Where stated in Normative Appendix G of ANSI/ASHRAE/IES Standard 90.1, the rating authority or program evaluator shall be the AHJ.

    Note to Adopting Authority: ASHRAE Standing Standard Project Committee 189.1 recommends that a compliance shell implementing the rules of a compliance supplement that controls inputs to and reports outputs from the required computer analysis program be adopted for the purposes of easier use and simpler compliance.

    Table D1.1 Modifications and Additions to Table G3.1 of Appendix G
    in ANSI/ASHRAE/IES Standard 90.1

    Proposed Building PerformanceBaseline Building Performance
    1. Design Model
    No modificationsNo modifications
    2. Additions and Alterations
    In addition to the requirements in Table G3.1 (2.a), work to be performed in the excluded parts of the building shall comply with Sections7.3 and7.4.No modifications
    3. Space Use Classification
    No modificationsNo modifications
    4. Schedules
    No modificationsNo modifications
    5. Building Envelope
    Exception (c) of Table G3.1 (5) shall be replaced with the following: The exterior roof surface shall be modeled using the solar reflectance and thermal emittance determined in accordance with Sections5.3.2.3 and5.3.2.4. Where test data are unavailable, the roof surface shall be modeled with a reflectance of 0.30 and a thermal emittance of 0.90.1. In addition to the requirements in Table G3.1 (5), the baseline building design shall comply with Section7.4.2.
    2. If the proposed design does not comply with Section7.4.2.9, then the fenestration area in the baseline building design shall be uniformly reduced until it complies. This adjustment is not required to be made when rotating the building as required in Table G3.1 (5.a).
    3. In addition to the requirements in Table G3.1 (5.d) and (5.e), roof surfaces shall comply with Section 5.3.2.3.
    6. Lighting
    1. In addition to the requirements in Table G3.1 (6.c), when lighting neither exists nor is specified, lighting power shall comply with Section7.4.6.
    2. When taking credit for daylight controls under Table G3.1 (6.f), credit may be taken only for lighting controls that are not required by Section7.4.6. Credit for daylighting controls is allowed to be taken up to a distance of 2.5 times window head height where all lighting more than one window head height from the perimeter (head height is the distance from the floor to the top of the glazing) is automatically controlled separately from lighting within one window head height of the perimeter.
    In addition to the requirements in Table G3.1 (6), lighting power
    shall comply with Section7.4.6. Automatic and manual controls
    shall be modeled as required in Section7.4.6.
    7. Thermal Blocks—HVAC Zones Designed
    No modificationsNo modifications
    8. Thermal Blocks—HVAC Zones Not Designed
    No modificationsNo modifications
    9. Thermal Blocks—Multifamily Residential Buildings
    No modificationsNo modifications
    10. HVAC Systems
    No modificationsIn addition to the requirements in Table G3.1 (10), the baselinebuilding design shall comply with all requirements in Section7.4.3.

    Table D1.1 Modifications and Additions to Table G3.1 of Appendix G
    in ANSI/ASHRAE/IES Standard 90.1 (Continued)

    Proposed Building PerformanceBaseline Building Performance
    11. Service Hot-Water Systems
    In addition to the requirements in Table G3.1 (11), service hot-water usage is allowed to be lower in the proposed design than in the baseline building design if service hot-water use can be demonstrated to be less than that resulting from compliance with Sections6.3.2,6.4.2, and6.4.3.1. In addition to the requirements in Table G3.1 (11.b) and (11.c), service hot-water systems shall meet the requirements of Sections7.4.4,7.4.7.2, and7.4.7.3.
    2. In addition to the requirements in Table G3.1 (11.f), the baseline building design shall meet the requirements of Section7.4.7.2. If a condenser heat recovery system meeting the requirements described in Section7.4.7.2 cannot be modeled, the requirement for including such a system in the actual building shall be met as a prescriptive requirement and no heat-recovery system shall be included in the proposed design or baseline building design.
    3. In addition to the requirements in Table G3.1 (11.i), the baseline building design shall meet the requirements of Sections6.3.2 and6.4.3.
    12. Receptacle and Other Loads
    No modificationsIn addition to the requirements in Table G3.1 (12), the baseline building design must meet the requirements in Section7.4.7.
    13. Modeling Limitations to the Simulation Program
    No modificationsNo modifications
    14. Exterior Conditions
    No modificationsNo modifications
    15. Renewable Energy Systems
    1. Purchase of off-site renewable energy shall not be modeled in the proposed design.
    2. The annual energy production of any on-site renewable energy systems in the proposed design shall be subtracted from the proposed building performance.
    The baseline building design shall have an on-site renewable energy system that complies with the annual energy production specified in Section 7. This annual energy production shall be subtracted from the baseline building performance. No exceptions shall apply.

    D1.1.1 Performance Option (Section G1.2 of ANSI/ ASHRAE/IES Standard 90.1).
    In addition to the requirements in Section G1.2 of ANSI/ASHRAE/IES Standard 90.1, all requirements in Sections 5.3, 6.3, 7.3, 8.3, and 9.3 shall be met.

    D1.1.2 Trade-Off Limits (Section G1.3 of ANSI/ ASHRAE/IES Standard 90.1).
    In addition to the requirements in Section G1.3 of ANSI/ASHRAE/IES Standard 90.1, future building components shall meet all requirements in Section 7.4.

    D.1.1.3 Documentation Requirements (Section G1.4 of ANSI/ASHRAE/IES Standard 90.1).

    a. In addition to the requirements in Section G1.4(d) of ANSI/ASHRAE/IES Standard 90.1, the documentation list shall include compliance with the requirements in Section 7.3.

    b. In addition to the requirements in Section G1.4(e) of ANSI/ASHRAE/IES Standard 90.1, the documentation list shall identify aspects that are less stringent than the requirements in Section 7.4.

    D1.1.4 Energy Rates (Section G2.4 of ANSI/ ASHRAE/IES Standard 90.1).
    In addition to the requirements in Section G2.4 of ANSI/ASHRAE/IES Standard 90.1, when the total modeled annual on-site renewable energy generated by the proposed design exceeds that generated by the baseline building design, the difference in the annual onsite generated renewable energy between the baseline building performance and the proposed building performance shall be based on the energy source used as the backup energy source in the proposed design or on the use of electricity if no backup energy source has been specified.

    D1.1.5 Baseline HVAC System Type and Description (Section G3.1.1 of ANSI/ASHRAE/IES Standard 90.1).
    The hood or hood section modeled according to Exception (d) to Section G3.1.1 of ANSI/ASHRAE/IES Standard 90.1 shall also meet the requirements of Section 7.4.3.9.

    D1.1.6 Ventilation (Section G3.1.2.6 of ANSI/ ASHRAE/IES Standard 90.1).

    a. Exception (a) to Section G3.1.2.6 of ANSI/ASHRAE/IES Standard 90.1 shall be used only where DCV is not required by Section 7.4.3.2.

    b. Exception (c) to Section G3.1.2.6 of ANSI/ASHRAE/ IES Standard 90.1 shall not apply.

    D1.1.7 Economizers (Section G3.1.2.7 of ANSI/ ASHRAE/IES Standard 90.1).

    a. Outdoor air economizers shall be included in the baseline systems identified in Section G3.1.2.7 of ANSI/ ASHRAE/IES Standard 90.1 for the climate zones and capacities specified in Table 7.4.3.4A.