The influence of the shape and dimensions of chimney blocks on regenerative heat transfer in a glass furnace with a horseshoe flame is considered. Chimney blocks with various combinations of the dimensions of the passage section, height and wall thickness have been studied. To evaluate the efficiency of the blocks, the parameters of the design calculation of the regenerator were used. It has been established that the smallest volume and mass of the high-temperature zone of the packing, limited by a smoke temperature of 1100 °C, is provided by TL 15/15 blocks, characterized by a specific volume of 0,259 m3/m3 and a specific heating surface of 18,9 m2/m3. In the sulphate condensation zone and the low-temperature packing zone, TG 15/15 blocks should be used, for which the specific volume and specific heating surface are 0,296 m3/m3 and 17,4 m2/m3 respectively. Ill. 6. Tab. 3. Ref. 28.