Pro
BH-321-1P is a model of ComfPro system controller manufactured by Honeywell. It is used in comfort control systems to control the temperature, humidity and air quality in commercial and residential buildings. The controller has an LCD display, a keypad and four inputs, each of which can be set to one of three modes: manual, automatic or override. The controller also has seven outputs: four relay outputs, two analog outputs and one common output. It can be used to control a variety of HVAC systems, such as heating and cooling systems, humidifiers, dehumidifiers and ventilation systems.