By: David Bixby, ACCA Manager of Codes
ACCA helps contractors comply with building codes. We also help code officials understand HVAC system design. Especially when it comes to verifying compliance with ACCA Manual J (load calculation), Manual S (equipment selection), and Manual D (duct design). These manuals are mandatory requirements found in the building codes by seeking recognition and enforcement of ACCA standards as mandatory requirements in building codes, we help to ensure a level playing field for contractors committed to doing the job right.
ACCA has developed a three-part video series that aims to help code officials better understand the three main aspects of a proper residential HVAC system design; a load calculation, selecting the appropriate equipment, and proper duct sizing. The basis for the videos are the code-referenced ACCA Manual J, Manual S, and Manual D. The videos do not represent a design course, but instead , provide an overview of the design process and presents ACCA-recommended verification points. This better enables code officials to verify that a system was designed correctly. It also provides contractors with guidance on demonstrating compliance with code officials. The following link will take you to the videos: https://www.acca.org/standards/codes#video