The Power Station Turow is located in Bogatynia, Poland, and has operated 10 pulverized units each 200 MW e . To meet Poland's new environmental standards, which are now compatible with EU, Turow decided to replace and upgrade six units (Nos 1 to 6) from 200 MW e to 235 MW e units and remove one unit No. 7. Units No. 8, 9 and 10 were equipped with dry sorbent desulfurization technology. Units No. 1 and 2 have been already replaced with new clean coal circulating fluidized bed technology. The Power Station Turow with six CFB units is to be the largest power station in the world based on fluidized bed technology. The paper presents the boiler design parameters, design arrangement and specific unique design features. The present state of boiler performance is presented.