"This resource offers commonly accepted sequences for a variety of air handling units and terminal units. There is no attempt here to cover every kind of HVAC unit. In some cases@ alternative sequences are presented; there is no attempt to cover all of the useable options. In addition to the sequences@ this document offers suggestions for development and customizing sequences of operation for a specific project. The examples presented here are well-founded sequences for each type of equipment and leave the advanced or very special control schemes to the consulting engineers and control contractors to provide as ""value added."" These control sequences are written for implementation using a DDC system."