Regulating accessories for air supply as part of water heaters and water boilers, namely, an electronic controller used to control a burner in a water heater or boiler by controlling air flow into the burner responsive to changes in physical parameters affecting air and/or fuel density

'accessori':2 'affect':42 'air':4,31,43 'and/or':44 'boiler':13,28 'burner':22,35 'chang':38 'control':17,20,30 'densiti':46 'electron':16 'flow':32 'fuel':45 'heater':10,26 'name':14 'paramet':41 'part':7 'physic':40 'regul':1 'respons':36 'suppli':5 'use':18 'water':9,12,25

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