KF-900B ventilation controller

This video demonstrates the setup, operation, and key moments during typical use of the KF-900B ventilation controller. Watch as we walk through the intuitive touch key interface, configure multi-mode operation including automatic, manual, timing, and sleep modes, and show how it directly controls fan start/stop and speed regulation. You'll see real-time air quality monitoring in action with PM2.5 and CO₂ level displays, plus smart ventilation management for improved indoor air quality in residential, commercial, and industrial applications.