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EFTA00281516 | EFTA00281694 3. Summary of Referenced Standards ANSIJASHRAE/IESNA Standard 90.1-2,007: Energy Standard for Buildings Except Low-Rise Residential American National Standards Institute American Society of Heating, Refrigerating and Air-Conditioning Engineers Illuminating Engineering Society of North America http:fiwwwashrae.org ANSIJASHRAWIESNA 90.1-2007 was formulated by ASHRAE under an ANSI consensus process. I ESNA is a joint sponsor of the standard. CI Credit 1.1 ANSIJASHRAE/IESNA 90.1-2.007 establishes minimum requirements for the energy-efficient design of buildings with these exceptions: single-family houses; multifamily structures of 3habitable stories or fewer above grade; manufactured houses (mobile and modular homes); buildings that do not use either electricity or fossil fuel; and equipment and portions of buildings systems that use energy primarily for industrial, manufacturing, or commercial processes. Building envelope requirements are provided for semiheated spaces such as warehouses. 4. Implementation The connected lighting power should be designed to maximize energy performance. Consider using an energy simulation model to assess the performance of the tenant space or building. General Guidance • Although task lighting may be used to supplement general lighting, take care to balance the various illuminance requirements of the space. • Lighting controls are not limited to on-off modes; continuous dimming can be implemented based on actual daylight levels. • Use high-efficacy sources and high internal reflectances to reduce the lighting power density. This credit compares the installed interior lighting power with the interior lighting power allowance. Use either the building area method or the space-by-space method in ASHRAE 90.1-2,007. See the Calculations section for details. 5. Timeline and Team Lighting requirements should be part of the owner's project requirements and may include the lighting technologies (LED, ceramic metal halide, Ts-HO, etc.) to be considered for the intended uses of the space. The lighting designer should include in the basis of design specific footcandle target levels for each major space type. Once the lighting system has been designed, it can be helpful to complete a photometric floor plan to identify areas that will be over- or underlit and refine the lighting design. 6. Calculations Installed Interior Lighting Power The installed interior lighting power, calculated as shown by Equation 1, is the power in watts of all permanently installed general,task,and furniture lighting systems and luminaires. ASHRAE90.12.007,Section 9.253, lists lighting equipment that is exempted from consideration in determining the lighting power density and therefore does not need to be included in the calculation. Note that luminaire wattages must be determined in accordance with ASH RAE 90.1-2007, Section 9.1.4. 2009 EDITION LEED REFERENCE GUIDE FOR GREEN INTERIOR DESIGN AND CONSTRUCTION 155 EFTA00281694
April 26, 2026 at 4:06 AM