Fan Speed Controller Units have the ability to slow down or speed up extractor fans and/or intake fans to maintain a set temperature as well as humidity. With units to suit all budgets the variispeed fan controller is a simply plug and play with the ability to dim the fan thats plugged in to it, then theres the rhino rc1 fan speed controller that can control both intake and outtake fan at the same time to maintain the desired temperature and last but not least is the intelligent evolution fan speed controller thats has the to control both intake and outtake fan as well as a heater unit in case the temperature drops below the whats been set on the unit.
