a ventilator control optimizer allowing the control of a ventilator without the need for manual input . the ventilator control optimizer analyzes trends in indoor environmental conditions and makes decisions based on these trends . the ventilator control optimizer is able to change ventilator fan speeds depending on the detected trends . this will prevent the ventilator from operating under conditions which might aggravate the humidity problem indoors . the ventilator control optimizer also allows auxiliary systems to be controlled automatically to deal with high humidity conditions .