For ventilation control on roll up sides and roof vents with low voltage motor packages. 110VAC input, 24VDC output. Also controls heaters & fans. All controllers have manual override. Tired of using multiple thermostats? We sell custom touch-screen controllers to control all the ventilation and heat in your greenhouse(s). Solar powered controllers and interface boxes to accept signals from other controllers are also available. For a quote, call with your requirements.