ASHRAE 100 Users’ Guide

This guide is intended to be used in conjunction with ANSI/ASHRAE/IES Standard 100-2018: Energy Efficiency in Existing Buildings (Standard 100). Standard 100 is an ANSI approved standard that was co-sponsored by IES. The Standard applies to existing building and provides procedures and program essentials through improved energy efficiency and performance in existing buildings.

The purpose of this User’s Guide is to provide additional explanation, examples, and reference material to supplement Standard 100. It is intended to provide useful material for the primary parties named in the standard, including but not limited to policy makers and program implementers to use the standard. This guide was developed with support from BC Hydro, the Province of British Columbia, and the Northwest Energy Efficiency Alliance (NEEA), and in partnership with the University of British Columbia (UBC) and the State of Washington Department of Commerce.

*Please note, this User’s Guide may not fully capture nor reflect the WA state amendments to Standard 100, as required by law. Please visit the Clean Buildings website for further details.

RDH Building Science, Inc. is the principal author and editor of this guide. It was developed by with support from BC Hydro, the Province of BC, and the Northwest Energy Efficiency Alliance (NEEA), and in partnership with the University of British Columbia (UBC) and the State of Washington Department of Commerce.

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ASHRAE 100 Users’ Guide
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