The sewer gases are conducted to a furnace or to a fluid-fuel
burner.
SEE OR SEARCH THIS CLASS, SUBCLASS:
222+, for general disinfecting or chemical dispensing apparatus.
SEE OR SEARCH CLASS
424, Drug, Bio-Affecting and Body Treating Compositions,
40+, for a composition that is usually incompletely burned or at least has a chemical reaction to project the composition into the air as a smoke, mist, or aerosol, and subclasses 76.1+ for a deodorant, disinfectant, or olfactory desensitizer composition.
454, Ventilation,
43, for a flue heater and subclass 48 for exterior vault or manhole covers.
