Factory-installed system, which allows economical, quick changeover between natural and propane gas in boilers and water heaters, comprised of a switch-activated electro-mechanical gas controller, sold as integral component part of boilers and water heaters

'activ':25 'allow':6 'boiler':16,37 'changeov':9 'compon':34 'compris':20 'control':30 'econom':7 'electro':27 'electro-mechan':26 'factori':2 'factory-instal':1 'gas':14,29 'heater':19,40 'instal':3 'integr':33 'mechan':28 'natur':11 'part':35 'propan':13 'quick':8 'sold':31 'switch':24 'switch-activ':23 'system':4 'water':18,39

FLEXGAS

Owners

Goods & Services