Heating systems for commercial and industrial applications comprised of gas burners, oil burners, biomass burners, direct fired heaters, indirect fired heaters, boilers, valves, pipes, manifolds, performance measuring instrumentation for heating systems, all sold as a unit, for heaters, burners, and boilers; spare parts for heaters, burners, and boilers, namely, valves, pipes, exhaust fans and manifolds

'applic':7 'biomass':14 'boiler':22,41,48 'burner':11,13,15,39,46 'commerci':4 'compris':8 'direct':16 'exhaust':52 'fan':53 'fire':17,20 'gas':10 'heat':1,30 'heater':18,21,38,45 'indirect':19 'industri':6 'instrument':28 'manifold':25,55 'measur':27 'name':49 'oil':12 'part':43 'perform':26 'pipe':24,51 'sold':33 'spare':42 'system':2,31 'unit':36 'valv':23,50

SIGMA THERMAL

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