GAS 4A Pro Plus Step Controller is a professional-grade fan controller engineered to provide silent, step-based fan speed control in hydroponic grow rooms, tents, and greenhouses. Unlike traditional controllers, this unit eliminates humming by adjusting fan speeds in smooth increments, improving both efficiency and comfort. Equipped with a built-in temperature sensor, the Pro Plus maintains ideal grow room conditions by automatically adjusting your fan’s performance based on environmental readings. It supports negative pressure, reduces energy usage, and extends fan life—making it ideal for growers who demand accuracy and quiet operation. Key Features: Step-based speed control for silent fan adjustment Maintains ideal airflow and climate stability Built-in temperature sensor for auto control Compatible with most AC fans (up to 4A) Preserves negative pressure for odour control Plug-and-play design — no wiring required Supports root zone health and full-cycle plant growth Perfect for hobby and professional grow setups
