Light-weight, Internet-connected sensors are able to better monitor HVAC equipment, including economizers. Why maintaining economizers are the low-hanging fruit for improving rooftop unit energy efficiency and why over 50% of economizers are not functioning properly. How Internet-connected HVAC sensors with fault-detection and other diagnostic capabilities are able to better monitor economizer usage and aid in both installation and maintenance. What is being done with all of the data provided that is being transmitted to the "cloud" by these Internet-connected sensors?