GAS - ENVIRO4 Fan ControllerOverview Introducing the Enviro4 Controller by Global Air Supplies, the ultimate solution for optimising your grow environment. With complete control over your growing conditions, this advanced controller simplifies your set up and allows you to maintain a perfect environment from a single point. The Enviro4 controls EC fan speeds and provides regulation for various equipment in your grow room through its four programmable sockets, revolutionizing the