Manual J (Heating and Cooling Load Calculations) is the name for a specific protocol used to determine how much heating/cooling a home needs to stay cool and dry in the summer and warm in the winter developed by the Air-Conditioning and Refrigeration Institute (ARI) and the Air Conditioning Contractors of America (ACCA) based largely on the American Society of Heating, Refrigeration, and Air-Conditioning Engineer’s (ASHRAE).

Related Definitions in the Project: The CSA Engineering