Profile: Hoffman Controls Corporation is a manufacturer of special purpose electronic controls. Our product solutions include EMC motor controls, furnace blower speed controls, variable speed fan controls, supply, exhaust and ventilation fan controls, condenser fan controls, manual fan speed controls, SCR heater controls, sequencing products, thermostats & transducers and motor protection products. Our condenser motor controls include 816-10DH head pressure control, 816-10DH(DC) head pressure control, 865-3AA series control, 744 series step controller, 851-MS multi sensor interface and 861-ASQ sequencer. Our 865-3AA three phase head pressure control modulates the condenser fan motor speed by varying the volume of air through the condenser. Our 760-ECM series electronic motor speed controller is designed to provide manually adjustable proportional speed control for new, energy efficient ECM (brushless dc) motors.