Jan. 24, 2014: ACCA Announces Public Review for Updated Manual D
Public Review Period Has Comment Deadline of Feb. 24, 2014
ARLINGTON, Va. — The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) has announced an American National Standards Institute (ANSI) public review period for “BSR/ACCA 1 Manual D - 201x, Residential Duct Systems” as a revised and redesignated industry standard. The public review period has a comment deadline of Feb. 24, 2014.
Manual D uses heating and cooling loads to determine space air delivery requirements for residential applications, noted ACCA. The Manual D procedures match duct system resistance (pressure drop) to blower performance (as defined by the manufacturer’s blower performance tables). This delivers appropriate airflow to the rooms and spaces, while ensuring that system airflow is compatible with the operating range of the HVAC equipment. The capabilities and sensitivities of the Manual D procedures are compatible with single-zone and multi-zone systems. The primary equipment may feature single-, multi-, or variable-speed blowers.