Draft PDS-01, RESNET HERS Addendum 98f, Wall Orientation (Comment opens April 2, 2026)

Proposed Addendum 98f, Wall Orientation, is the follow-on permanent version of interim Addendum 98i. Interim Addendum 98i, Wall Orientation, removed the RESNET HERS Standards requirement for documenting the orientation of each wall when using ANSI/RESNET/ICC 301-2022 for developing and reporting HERS Index ratings. The wall orientation requirement was incorporated in Standard 301-2022 to resolve concerns with the consistency in modeling home energy use. Draft PDS-01 Addendum 98f addresses that concern in a different manner.

Comments will be accepted on underlined and strike through text in red print within draft PDS-01. To review and comment on the Draft follow the links below. The public comment period begins April 2, 2026, and ends May 1, 2026.

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