heating gases 12 natural gas 5 pyrolysis 4 combustion 4 wastes 3 tyres 3 simulation and modelling 3 more ... electrical heating equipments 2 natural gas energy sources 2 consumption 2 house-hold wastes 1 fluid boilers 1 mathematical models 1 gas fuels 1 plynové rozvody 1 additives 1 regulátory tlaku plynu 1 exchangers 1 calculations 1 supply 1 less ...