3.0
Energy and Atmosphere
(Continued)
Optimize Energy Performance (1)
3.C1
Intent:
Achieve increasing levels of energy performance above the prerequisite standard to reduce environmental
impacts associated with excessive energy use.
Requirement:
Reduce design energy usage (DEU) compared to the energy use budget (EUB) in joules per square meter
20
per year for regulated energy components as described in the requirements of Chapter 11 of the TI 800-01
(Design Criteria), as demonstrated by a whole building simulation.
1 Point will be awarded for every reduction in design energy use of 2.5% for both new and existing
facilities for a maximum score of 20 points.
Regulated energy components include HVAC systems, building envelope, service hot water systems, lighting and
other regulated systems as defined by ASHRAE.
Technologies
Develop and use building modeling and analysis techniques to establish a base case that meets the minimum
/Strategies:
prerequisite standard. ASHRAE/IESNA 90.1-1999 provides guidance for establishing building base case
development and analysis. Perform interactive energy use analysis for selected design elements that affect
energy performance and document compliance.
Unit of measure for performance shall be annual energy usage in joules per square meter. Life-Cycle energy
costs shall be determined using rates for purchased energy, such as electricity, gas, oil, propane, steam, and
chilled water and approved by the adopting authority. Refer to the LEED Reference Guide or Whole Building
Design Guide for a wide variety of energy efficiency resources and strategies including conservation measures,
electromechanical energy efficiency technologies (for example ground-source heat pumps), passive heating and
cooling strategies, solar hot water, and daylighting.
Life-Cycle costing will be done in accordance with 10 CFR 436.
Consider installation of an Energy Management and Control System (EMCS), which is compatible with exiting
installation systems to optimize performance. Use sensors to control loads based on occupancy, schedule and/or
the availability of natural resources use (day light or natural ventilation).
(1)
3.C2
Renewable Energy
Intent:
Encourage and recognize increasing levels of self-supply through renewable technologies to reduce
environmental impacts associated with fossil fuel energy use.
Requirement:
Supply a net fraction of the building's total energy use through the use of on-site renewable energy systems.
% of Total Annual Energy Usage in Renewables
5%
1
10%
2
15%
3
20%
4
Technologies
Employ the use of on-site non-polluting-source renewable technologies contributing to the total energy
/Strategies:
requirements of the project. Consider and use high temperature solar and/or geothermal, photovoltaics, wind,
biomass (other than unsustainably harvested wood), and bio-gas. Passive solar, solar hot water heating, ground-
source heat pumps, and daylighting do not qualify for points under this credit. Credit for these strategies is given
in Energy & Atmosphere Credit 1: Optimizing Energy Performance.
(1)
Adapted material not reviewed or endorsed by U. S. Green Building Council.
Sustainable Project Rating Tool (SPiRiT) v.1.4.1
June 2002
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