BE CREDIT 1: OPTIMIZE ENERGY PERFORMANCE
1 - 3 POINTS
INTENT
Encourage the design and construction of energy efficient buildings to
reduce air, water, and land pollution, and environmental impacts from
energy production and consumption.
REQUIREMENTS
Design and construct at least 90% of all habited buildings in the
project such that they meet one of the following requirements according
to the appropriate building type.
Minimally Exceed
Performance (1 point):
For
non-residential buildings and residential buildings over 3 stories:
Option 1
Whole Building Energy Simulation: Demonstrate a minimum 10% improvement
in the proposed building performance rating compared to International
Energy Conservation Code (IECC). Perform a whole building
project simulation using the Building Performance Rating Method per
Appendix G of ASHRAE/IESNA Standard 90.1-2004. Appendix G
requires that this energy analysis include ALL of the energy costs
within and associated with the building project. To achieve
this point, the proposed design:
Must comply with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4,
9.4 and l0.4) in Standard 90.1-2004 (without addenda) or local code,
whichever is more stringent.
AND
Must include all the energy costs within and associated with the
building project,
AND
Must be compared against a baseline building that complies with
IECC. The default process energy cost is 25% of the total
energy cost for the baseline building. For buildings where
the process energy cost is less than 25% of the baseline building
energy cost, the LEED submittal must include supporting documentation
substantiating that process energy inputs are appropriate.
For the purposes of the analysis, process energy is considered to
include, but is not limited to:
Office and general miscellaneous equipment: computers, elevators and
escalators, kitchen cooking and refrigeration, laundry washing and
drying, lighting exempt from the lighting power allowance (e.g.
lighting integral to medical equipment) and other (e.g. waterfall
pumps).
Regulated (non-process) energy includes: lighting (such as for the
interior, parking garage, surface parking, facade, or building grounds,
except as noted above), HVAC (such as for space heating, space cooling,
fans, pumps, toilet exhaust, parking garage ventilation, kitchen hood
exhaust, etc.), and service water heating for domestic or space heating
purposes.
For this credit, process loads shall be identical for both the baseline
building performance rating and for the proposed building performance
rating. However, if process loads are reduced, the
Exceptional Calculation Method (ASHRAE 90.1-2004 G2.5) may be used to
document such process loads reductions.
Documentation of process load energy savings shall include a list of
the assumptions made for both the base and proposed design, and
theoretical or empirical information supporting these assumptions.
For residential
buildings 3 stories or fewer:
Qualify as an ENERGY STAR Home by the prescriptive Builder Option
Package (BOP).
Moderately Exceed Performance (2 Points):
For non-residential buildings and residential buildings over 3 stories:
Option 2
Whole Building Energy Simulation: Demonstrate a minimum 20% improvement
in the proposed building performance rating compared to the baseline
described above in Option 1 for non-residential buildings and
residential buildings over 3 stories.
OR
Option 3
Prescriptive Compliance Path: Comply with the prescriptive
measures of the ASHRAE Advanced Energy Design Guide for Small Office
Buildings or the ASHRAE Advanced Energy Design Guide for Small Retail
Buildings, as appropriate to building type. The following restrictions
apply:
Buildings must be less than 20,000 square feet.
Buildings must be office or retail occupancy.
Project teams must fully comply with all applicable criteria as
established in the Advanced Energy Design Guide for the climate zone in
which the building is located.
For residential
buildings 3 stories or fewer:
Qualify as an ENERGY STAR Home by achieving a HERS Index rating of 80
or better for IECC Climate Zones 6-8.
Aggressively Exceed
Performance (3 Points):
For
non-residential buildings and residential buildings over 3 stories:
Option 4
Whole Building Energy Simulation: Demonstrate a minimum 30%
improvement in the proposed building performance rating compared to the
baseline described above in OPTION 1 of non-residential buildings or
residential buildings greater than 3 stories.
OR
Option 5
Prescriptive Compliance Path: Comply with the Basic Criteria
and Prescriptive Criteria of the Advanced Buildings
Benchmark™ Version 1.1 with the exception of the following
sections: 5.7 Monitoring and Trend-logging, 5.11 Indoor Air Quality,
and 5.14 Networked Computer Monitor Control.
For residential buildings 3 stories or fewer:
Exceed the ENERGY STAR for Homes requirements by achieving a HERS Index
of 70 or better for IECC Climate Zones 6-8.
BE Table
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