The core of condensation technology is to reduce the heat loss of fuel combustion, absorb the heat energy generated by fuel efficiently, and collect the harmful substances in flue gas into condensed water because of flue gas condensation. It reduces the discharge of acid and other pollutants into the air. More advanced condensing gas heating boilers use smokeless combustion technology to reduce emissions of nitrogen oxides (NOx can lead to acid rain and Greenhouse Effect) beyond 35mg/kwh