For Public Review Purposes: Version 2.50 of Manual D has new normative pages that fully detail the minimum Manual D requirements. The Sections and Appendices that follow are informative material(discussion, background information, and example problems). The example problems for air-zoned systems, and related information material, are deleted from this version of Manual D. Air zoning content will be placed in the Manual ZR, Residential Zoning update (planned release mid- 2017). Various minor changes to the prior-approved 2014 Manual D Sections and Appendices (now marked as "informative sections") are identified by red-underline text, or strike through text.
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