Linyi County Government Affairs Hall is a comprehensive office and convenience service center in Linyi County, Shandong Province, with a total construction area of 28,000 square meters. The party committee combined with the actual situation of the building through comprehensive investigation and multiple demonstrations, and finally chose to install 5 WLL-300 module combinations. Ou Ke full premixed frequency conversion condensing boiler, compared with urban central heating, saves the government about 45% of heating costs every year.