Gas burners for indicate use, e.g., industrial, commercial, domestic use; Gas stoves; Hot water heaters; Gas water heaters; Folding portable charcoal, propane and gas fired barbecues, stoves, and grills; Commercial and industrial cookware, namely gas and electric boilers, gas and electric broilers, gas and electric roasters, gas and electric braising pans; Range hoods; Ventilating exhaust fans