Shell and tube heat exchangers from carbon or stainless steel,, recuperators for making additional use of waste thermal energy,, cisterns,, robust THERMEX hot-water and steam boilers with overall annual efficiency rates of up to 95 %,, implementation of hot-water, hot-oil and steam boiler rooms,, hot-water and steam boilers by the following manufacturers TVT-TAM-STADLER, EMO Celje, Ðuro Ðakoviè, Weiss-Toplota, Kohlbach, Loos, Viessmann, Omnical, TPK.