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ASHRAE 90435

Advanced Energy Design Guide for Small Office Buildings: 30% Energy Savings

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Organization: ASHRAE
Publication Date: 1 January 2004
Status: active
Page Count: 104
scope:

The Advanced Energy Design Guide for Small Office Buildings (Guide) is intended to provide a simple approach for contractors and designers who create office buildings up to 20,000 ft2. Application of the recommendations in the Guide should result in small office buildings with 30% energy savings when compared to those same office buildings designed to the minimum requirements of ANSI/ASHRAE/IESNA Standard 90.1-1999. This document contains recommendations and is not a minimum code or standard. It is intended to be used in addition to existing codes and standards and is not intended to circumvent them. This Guide represents a way, but not the only way, to build energy-efficient small offices buildings that use significantly less energy than those built to minimum code requirements. The recommendations in this Guide provide benefits for the owner while maintaining quality and functionality of the space.

This Guide has been developed by a committee representing a diverse group of energy professionals drawn from the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), the American Institute of Architects (AIA), the New Buildings Institute (NBI), and the Illuminating Engineering Society of North America (IESNA). To quantify the expected energy savings, these professionals selected potential envelope, lighting, HVAC, and service water heating energy-saving measures for analysis. These included products that were deemed to be both practical and commercially available. Although some of the products may be considered premium, products of similar performance are available from multiple manufacturers. Each set of measures was simulated using an hour-by-hour building energy analysis computer program for two small office prototypes in representative cities in various climates. Simulations were run for reference buildings (buildings designed to Standard 90.1-1999 criteria) compared to buildings built using recommendations contained in this Guide to determine that the expected 30% savings target was achieved.

The scope of this Guide covers small office buildings up to 20,000 ft2 in size that use unitary heating and air-conditioning equipment. Buildings of this size with these HVAC system configurations represent a large fraction of commercial office space in the United States. This Guide provides straightforward recommendations and "how-to" guidance to facilitate its use by anyone in the construction process who wants to produce more energy-efficient buildings.

As an added value for designers and contractors, this Guide features examples of energy efficient buildings appropriate for each climate zone. The examples demonstrate that effectively addressing environmental challenges can also result in the creation of good, often excellent, architecture. The examples were selected from the American Institute of Architects' annual Top Ten Green Projects competition winners, the Department of Energy's High Performance Buildings Database, and individual project architects. The examples illustrate how energy considerations have been incorporated in various design strategies and techniques. However, the example buildings may incorporate additional features that go beyond the scope of the recommendations of the Guide. The result of the Guide, it is hoped, will be a better built environment for society.

Document History

ASHRAE 90435
January 1, 2004
Advanced Energy Design Guide for Small Office Buildings: 30% Energy Savings
The Advanced Energy Design Guide for Small Office Buildings (Guide) is intended to provide a simple approach for contractors and designers who create office buildings up to 20,000 ft2. Application of...

References

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