Welcome to DDC-Online.org

The complexity and proprietary nature of DDC systems can make it difficult to stay current with the designs, installations, operation and maintenance. This guide was developed specifically to help building owners and consulting/specifying engineers with these issues.

Both generic and specific information on DDC systems:

Getting Started – an overview of direct digital controls

• a basic introduction to DDC and the terms used in the industry
   
• a detailed publication on input and output processes of DDC systems.

DDC Information - Manufacturer’s product list:

• a detailed listing of DDC system architectures, hardware components and software associated with DDC systems from the prominent national manufacturers
   
• a generic framework of the various components and configurations used in current DDC systems, providing information on DDC manufacturers in a consistent architecture diagram so readers can easily compare their relative features and benefits.

The Iowa Energy Center developed DDC-Online.org in conjunction with the U.S. Department of Energy Office of Building Technology, State and Community Programs (DOE-OBT), Pacific Northwest National Laboratory (PNNL) and Facility Dynamics Engineering.

Manufacturer product line information is gathered and analyzed by KJWW Engineering Consultants, 623 26th Ave., Rock Island, IL 61201. Located online at www.kjww.com or contact them by email.