GAS Dual VPD Intelligent Humidity ControllerG. A. S Intelligent Humidity Controller Dual Keep Humidity Dialled In Automatically The G. A. S Intelligent Humidity Controller Dual gives you full control over your grow room humidity, helping you maintain perfect levels automatically with no constant adjustments required. Whether you're vegging or flowering, keeping humidity stable is key to healthy growth and quality results. This controller takes the hassle out of managing it, helping you avoid