As Fig. 9 shows, during 2013–2017, coal-fired boiler control made the largest contribution of 5.9 µ g m −3, accounting for 18.7 % of the total decrement. Clean fuels in the residential sector was the second greatest contributor after coal-fired boiler control 2.5 µ g m .
Heating, ventilation, air conditioning (HVAC) and refrigeration equipment Installation and maintenance services, for heating, ventilation, air conditioning (HVAC) and refrigeration equipment Installation services, industrial boilers
Gaoxinqu Area, Zhengzhou Henan China
Email: [email protected]