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EFTA00281516 | EFTA00281706 American National Standards Institute/ASHRAEfilluminating Engineering Society of North America Standard 90.1-2007: 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:J/www.ashrae.org ANSIJASHRAWIESNA Standard 90.1-2007 was formulated by ASHRAE under an ANSI consensus process. IESNA is a joint sponsor of the standard. EA CI Credit 1.3 ANSIJASHRAE/IESNA Standard 90.1-2007 establishes minimum requirements for the energyefficient design of buildings, with these exceptions: single-family houses; multifamily structures of 3 habitable 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. The energy cost budget method (Section 11) allows the project team to exceed some of the prescriptive requirements provided energy cost savings are made in other areas. However, in all cases, the mandatory provisions must still be met. 4. Implementation OPTION 1. Equipment Efficiency and Zoning Controls The equipment efficiency approach draws from Sections 1.4, 2.9, and 3.10 of the Advanced Buildings Core Performance Guide. Section 1.4 covers mechanical system design intended to closely match actual building loads and to meet ASH RAE 55; Section z.8 covers lighting power density (LPD) by interior space types with specifications not exceeding the Advanced Buildings minimum LPD table; Section 3.10 covers the installation of ENERGY STAR-labeled cool roofs. Follow the requirements laid out in the Core Performance Guide to reduce operating costs, urban heat island effect, and energy use and to maximize occupants' comfort. Small private spaces intended for single, temporary occupancy (e.g., for making confidential telephone calls) may be included as part of a larger thermal zone, since changes in occupancy will not cause large swings in the heating and cooling loads. OPTION 2. Comparison with ASHRAE 90.1-2007 In this option, compare the design annual energy cost with the annual energy cost based on meeting the minimum ASHRAE 90.1-2007 requirements. Only energy costs for space heating, space cooling,and associated fans and pumpsare considered;however, the performance ofthese systems is influenced by the performance of other buildingsystems. To determine the reduction in annual costs for the project area, consider the entire building area that is served by the HVAC plant for the project in the evaluation, since the building design and operations beyond the project space influence the design and operation of the HVAC plant. Energy-Efficient Buildings Landscaping protects a building from wind and provides shade, which helps reduce the heat island effect. Characteristically, buildings oriented along an east-west axis obtain the most effective exterior shading. Confirm that the selected building is weather tight and meets code-minimum insulation levels. Lighting accounts for a major portion of a commercial building's energy budget. Efficient lighting in common areas, inside and out, reduces costs. Confirm that the owner has established lighting density standards for all tenant spaces. 2009 EDITION LEED REFERENCE GUIDE FOR GREEN INTERIOR DESIGN AND CONSTRUCTION 187 EFTA00281706
April 26, 2026 at 4:07 AM