Back and better than ever, MacroAir has reintroduced the Controller 4, now with individualized fan control. Seamlessly control up to four fans at one centralized location. Fans can be run at speeds and direction independently of one another to give you optimal fan control at a price that fits your budget. Take your smart controls even further by adding a MacroAir Temperature Sensor. Fans on your network will start and stop based on your desired temperature threshold to take the guesswork out of providing maximum comfort.