Flue blocks the RIRs TB-the indirect heating of the coolant to preclude the coolant from entering the combustion products of fuel and ignited particles, which allows the use of a wider range of fuels. Used as a heat source in drying systems silo, louvered, coring and boring types when drying a wide range of agricultural crops, and also for drying sand, sawdust and peat, gravel in rotary dryers. RIR heat exchangers used in the reconstruction of grain dryers DSP-32, DSP-50, M-819, M-832, dryers of the type STS, SVM, to replace burnt-out furnace blocks. Heat generators have been used successfully RIR in air heating systems for various premises: in animal husbandry when heating of the animals after the wet disinfection, heating and ventilation of farms in the cold time of year in crop production, to create favorable temperature conditions in greenhouses and hotbeds. The advantages of furnace blocks RIRs: versatility, efficiency, durability, endurance, ease of installation, reliability. RIR-standard produces heating units with heat capacity from 600 to 3200 kW. Buy the burner unit of indirect heating: TB-0,6 - 244 100 rubles with VAT; TB-0,75 - 266 400 rubles with VAT; TB-0,8 - 565 900 rubles with VAT; TB-1,2 - 639 600 rubles with VAT; TB-1,6 - 719 900 rubles with VAT; TB-2,5 - 978 700 rubles with VAT; TB-3,2 - 1 290 700, including VAT.