The ECL-VAVS controllers are microprocessor-based programmable variable air volume (VAV) controllers designed to control cooling only and cooling with reheat single duct VAV boxes. This updated 9-point VAV controller includes a robust hardware design, a drift-free NoZero calibration airflow sensor, improved power daisy-chaining performance and preloaded applications, all of which streamline installation and commissioning time. Each controller uses the LonTalk® communication protocol and is LonMark certified as an SCC VAV.