ACCA is an ANSI-accredited standards developer that develops standards and supports the American National Standards Institute (ANSI). ANSI approval of ACCA manuals, procedures and processes verifies that the principles of openness and due process have been followed in developing these materials, and that a consensus of those directly affected by the standards has been achieved.

ACCA’s standards activity is overseen by our Standards Task Team, which forms subcommittees as needed to oversee specific standards development. The process is open and you are encouraged to get involved; for more information, contact standards-sec@acca.org.

CURRENT ACTIVITIES

ACCA Announces ANSI Public Review for Reaffirmation of ANSI/ACCA Manual J – 2016, Residential Load Calculation

Alexandria, VA (October 29, 2025) - The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces an American National Standards Institute (ANSI) public review period for reaffirmation of ANSI/ACCA 2 Manual J - 2016, Residential Load Calculation.

The 45-day ANSI public review period will start on October 31 with a comment deadline of December 15. This standard is proposed to be reaffirmed with no changes in accordance with ANSI’s 5-year essential requirements. A separate revision project for Manual J is in the development stages with future changes planned for 2026.

A online public review form for comments with a link to the above standard has been posted at the following link: review from here.

Manual J is intended for producing HVAC equipment sizing loads for single-family detached homes, small multi-unit structures, condominiums, town houses, and manufactured homes. A proper load calculation, performed in accordance with the Manual J procedure, is required by national building codes and most state and local jurisdictions.

For more information about ACCA Manual J or ACCA itself, please contact Kate Wessels, ACCA vice president of communications, marketing, and partnerships at kate.wessels@acca.org or 703-824-8864.

ACCA ANNOUNCES SECOND ANSI PUBLIC REVIEW FOR MODIFICATIONS TO PROPOSED “ADDENDUM C” TO MANUAL S® – 2023 RESIDENTIAL EQUIPMENT SELECTION 

Alexandria, VA (October 20, 2025) - The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces an American National Standards Institute (ANSI) second public review for modifications to proposed “Addendum c” to ANSI/ACCA 3 Manual S® –2023, Residential Equipment Selection, as a revised industry standard.

The 30-day ANSI public review period will be from October 31, 2025, to November 30, 2025. Proposed Addendum c will supplement ANSI/ACCA 3 Manual S® –2023, Addendum a – 2024, and Addendum b –2024. The modifications to the proposed Addendum c are solely based on comments received during the first public review draft on June 6, 2025.

Manual S® provides procedures for selecting and sizing residential cooling equipment, heat pumps, electric heating coils, furnaces, boilers, ancillary dehumidification equipment, humidification equipment, and direct evaporative cooling equipment. Manual S® is also a requirement specified in the International Residential Code and the Uniform Mechanical Code.

A red-line review draft of the modifications is available at the link below. Submit comments using the form at the same link before the ANSI public review date above.

ACCA ANSI Review Form - Manual S® Addendum C

For more information about Manual S® or ACCA, please contact Kate Wessels, ACCA vice president of communications, marketing, and partnerships, at kate.wessels@acca.org  or 703-824-8864.

ACCA Announces ANSI Public Review for Reaffirmation of ANSI/ACCA 9 QIvp – 2016, HVAC Quality Installation Verification Protocols

Alexandria, VA (October 6, 2025) - The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces an American National Standards Institute (ANSI) public review period for reaffirmation of ANSI/ACCA 9 QIvp – 2016, HVAC Quality Installation Verification Protocols.

The 45-day ANSI public review period will start on October 3 with a comment deadline of November 17. This standard is proposed to be reaffirmed with no changes in accordance with ANSI’s 5-year essential requirements.

A public review form for comments with a link to the above standard has been posted at the following link: Iink here.

This standard specifies the protocols to verify that elements of a specific HVAC system installation complying with ACCA 5 QI, HVAC Quality Installation Specification. The verification protocols apply to installations of HVAC equipment/components in new and existing residential and commercial buildings that seek to demonstrate adherence to the requirements of the ACCA 5 QI Standard.

For more information about ACCA 9 QIvp or ACCA itself, please contact Kate Wessels, ACCA vice president of communications, marketing, and partnerships at kate.wessels@acca.org or 703-824-8864.

ACCA Announces ANSI Public Review for Proposed ACCA 5 QI, HVAC Quality Installation Manual

Alexandria, VA (October 6, 2025) - The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces an American National Standards Institute (ANSI) public review period for ACCA 5 QI, HVAC Quality Installation Specification, as a new American National Standard.

The 45-day ANSI public review period will start on October 10 with a comment deadline of November 24, 2025. The proposed standard is unchanged from ANSI/ACCA 5 QI – 2015, for the purpose of regaining its ANSI designation as a new standard.

ACCA 5 QI contains minimum requirements for properly designing, installing, testing and commissioning HVAC installations for residential and light commercial applications. Developed by abroad coalition of industry stakeholders, the standard identifies consensus requirements associated with quality installations, acceptable procedures for measuring or verifying the attainment of those requirements, and acceptable forms of documentation to show compliance with the requirements.

A public review form for comments with a link to the above standard has been posted at the following link here.

For more information about ACCA 5 QI or ACCA itself, please contact Kate Wessels, ACCA vice president of communications, marketing, and partnerships at kate.wessels@acca.org or 703-824-8864.

Member Input Needed – ACCA Reviewing Several of its ANSI Recognized Standards for Potential Updates 

ACCA has begun the process to review several of its current standards that are recognized by the American National Standards Institute (ANSI).  According to ANSI’s Essential Requirements, once a standard is approved it must be reviewed every 5 years to determine whether it requires (a) additional changes or updates, (b) reaffirmation if no changes are needed, or (c) withdrawal. 

In conjunction with ACCA's review, if you have any changes or additions to offer on any of the above standards, please contact standards-sec@acca.org.

ACCA-EI Standards Task Team

For the latest standards developments being undertaken by the Standards Task Team, please view the updated ANSI/ACCA Standards Development Schedule by clicking here.

Meeting Minutes

• March 25, 2025
• March 12, 2024
• April 3, 2023
• March 28, 2022
• March 24, 2020
• March 5, 2019
• February 13, 2018
• March 21, 2017
• March 10, 2016
• March 16, 2015
• March 17, 2014
• February 28, 2013
• March 6, 2012
• February 16, 2011
• March 9, 2010
• March 19, 2009
• February 7, 2008
• March 12, 2007
• March 29, 2006
• March 10, 2005
• February 25, 2004
• March 15, 2003
• March 1, 2002

Standards Task Team Roster.

Submit this form to propose a standard for consideration by ACCA.

Submit this form if you are interested in serving on the STT and would like to nominate yourself for consideration by ACCA.

This document outlines the operational and organizational guidelines for ACCA ANSI standards.

• Technical Manuals
• Quality Standards
• Approved Software
• Speed-Sheets
• Building Codes 
• ANSI Standards Process

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