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ACCA Manual J – Builders

The Air Conditioner Contractors of America (ACCA) Manual J (8th Edition) Residential Load Calculation is the most widely recognized and building code-approved method for calculating room-by-room and whole-house heating and cooling loads. The days of using a “rule of thumb” approach to measure an HVAC system is long gone.

ACCA Manuals J and S must be performed and submitted on every home in order to acquire a building permit. Per the Mechanical Section of the 2015 International Residential Code (IRC):

M1401.3 Equipment and appliance sizing. Heating and cooling equipment and appliances shall be sized in accordance with ACCA Manual S or other approved sizing methodologies based on building loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies.”


Our trained and certified professionals will help you complete a successful Manual J calculation and ensure that the system will work as intended. Using ACCA-approved Wright Soft® software, they will work closely with you to gather the necessary construction plans and specifications from your client.

If you would like to see an example of our ACCA Manual J Building Load Report, use the Contact Form to request a copy.

For more information, download the ACCA Manual J Brochure, which includes a checklist.

Our staff at Enerlogic would be happy to answer all of your ACCA Manual J load calculation questions and provide both design and installation verification services in a timely manner.

Manual J - Residential Load Calculation

At Enerlogic we would be happy to answer all of your HVAC System design questions and provide you with design services in a timely manner.

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