help me to reply to this student shortly While watching the slide on ACCA I realized they played a significant role in HVACR industry. The ACCA takes pride in shaping industry standards and practices. I agree ACCA also thrives development and implementation of building codes and standards. Manual J uses calculation or load calculation to determine the total amount of heat that is lost through the exterior of a home during the cooler months. Chi Kin Ho you forgot to tell us how you would incorporate Manual J into our household