Contractors: Beware of Inappropriate Load Calculation Software
Manual J ® is the ANSI-approved national standard for determining residential load calculations for HVACR systems, and is required by many building codes and regulations. It is produced by the Air Conditioning Contractors of America (ACCA), the nation's largest association of indoor environmental systems professionals.
Given the complexities of modern construction, contractors and design professionals are encouraged to use software for accurate system design. However, not all load calculation software is created equal.
ACCA is reminding contractors that only those software programs that have been approved and licensed by ACCA as “Powered by Manual J ®” can be considered in compliance with codes and regulations requiring the use of Manual J ®.
As of today, the only software programs that meet the requirements for Manual J ® load calculations are:
Any other software program, online service or mobile application cannot be considered to be compliant with the Manual J ® standard and should not be used where Manual J ® is required. Use of non-authorized software may pose a liability for the contractor that installs the system.
For more information on Manual J ®, the ACCA system design process, and load calculation software, visit https://www.acca.org/industry/system-design