Alexandria, Virginia-Das ACA-Ei-Standard-Task team (ACA-EI) of the Air conditioning of America (STT) announces a public review period for the American National Standards Institute (ANSI) for proposed revisions at Ansi/ACCA 11 Manual ZR-2018, residential zoning, as revised industrial standard.
The 30-day Ansi Public Review period takes place from July 25 to August 24, 2025.
This is the first public review for proposed revisions of the Manual ZR-2018 and only includes correction of an error in the formula in Figure 2-2 Air cooling in section N2-9, bypass channel capacity.
Manually ZR offers procedures and requirements for the design of zone comfort systems for residential buildings, including single-family houses, duplex and triplex houses, rows and town houses as well as large, multi-family structures that are compatible with manual J procedures.
Get a copy of the proposed correction into the formula and send comments here.