ENERGY STAR Single-Family New Homes, Version 3 / 3.1 ENERGY STAR Multifamily New Construction, Version 1 / 1.1 / OR-WA 1.2 Design Temperature Limit Reference Guide (2019 Edition) These 2019 Edition limits are permitted to be used with any National HVAC Design Report, and are required to be used for all National HVAC Design Reports generated on or after 10-01-2020 Introduction One requirement of the ENERGY STAR Single-Family New Homes and Multifamily New Construction (MFNC) programs is to use outdoor design temperatures that do not exceed the maximum cooling season temperature and minimum heating season temperature listed in this reference guide for the state and county, or territory, in which the home is to be certified. Only two exceptions apply: 1. Jurisdiction-Specified Temperatures: If the outdoor design temperatures to be used in load calculations are specified by the jurisdiction where the home will be certified, then these specified temperatures shall be used. 2. Temperature Exception Request: In rare cases, the designer may believe that an exception to the limits in the reference guide are warranted for a particular state and county, or territory. If so, the designer must complete and submit a Design Temperature Exception Request, including a justification for the exception, to
[email protected] for review and approval prior to the home’s certification. To obtain the most accurate load calculations, EPA recommends that designers always use the ACCA Manual J, 8th edition, 1% cooling season design temperature and 99% heating season design temperature for the weather location that is geographically closest to the home to be certified.