quirements from the Manual J load calculation. For residential equipment selections, ACCA’s Man-ual S®, is the only procedure recognized by the American National Standards Institute (ANSI). If the Manual J load calculation is done then the next step is to select the equipment that will deliver the necessary heating and cooling. ACCA’S A load calculation program based on Manual J, designed to be quick and easy to use. It calculates the amount of heating and cooling BTU's needed for the whole house. Getting started: Select a State or Province; afterwards you will then be given a choice of cities, airports or other major locations.

Manual definition, done, operated, worked, etc., by the hand or hands rather than by an electrical or electronic device: a manual gearshift. See more.