Centralized heating is a heating method refers to the construction of a centralized heat source in industrial production areas and areas where urban residents gather and provides heat to enterprises and residents in this area. Common centralized heating modes include co-generation, regional coal-fired boilers, and gas boilers. The working principle of boiler heating is that water enters the boiler, after heating then s sent to the indoor radiator through the circulating water pump and provide heat by radiator. The water is returned to the inside of the boiler for heating, and then flows back into the radiator and circulates like that.