Internet-based monitoring and controls for HVAC applications

Significant advances in Internet and computer technology have made it possible to develop an Internet-based control, monitoring, and operation scheduling system for heating, ventilation, and air-conditioning (HVAC) systems. The proposed system architecture includes such features as control, measurement, networking, and reporting. This article addresses issues in architecture selection, electronics, embedded processors and software, and Internet technologies. This article also proposes an Internet-based HVAC system architecture that combines Web technology, networking, and functions of direct digital control. The proposed system also includes technologies needed for supporting real-time digital thermostat control, data gathering, remote access and occupancy control, light sensing control, and views of the history of HVAC utilization. This system enables users to make cost-effective energy decisions and quickly identify trouble spots of HVAC systems to minimize system down time