Abstract: An air conditioning system for a space comprising ducting extending from an entry end opening in the space to an exit end opening in the space; a heater element positioned in the ducting; a cooling loop including a compressor and an evaporator coil positioned in the ducting; a blower operative to move air through the ducting from the entry end to the exit end with the circulating air passing over the evaporator coil and over the heating device; bypass ducting extending around the evaporator coil; a damper controlling the movement of circulating air through the bypass ducting; a motor controlling the damper; sensors generating a signal indicative of the temperature of the air in the space, a further signal indicative of a humidity of the air in the space, and a further signal indicative of the temperature at the evaporator coil; and a controller receiving the signals and operative in response to the received signals to selectively modulate the motor to selectively modulate the damper and selectively modulate t