This is the first public review for proposed revisions to Manual Zr – 2018, and only involves correcting an error in the formula in Figure 2-2 related to Air - Air Cooling referenced under Section N2-9, Bypass Duct Relief.

Manual Zr provides procedures and requirements for designing zoned comfort systems for residential buildings, including single-family detached homes, duplex and triplex homes, row and townhouses, and large, multi-family structures that are in accordance and compatible with Manual J procedures.

Get a copy of the proposed correction to the formula and submit comments here.