- Small experiments like heating-melting small objects
- Flame under water
- Jewelry work
- Welding, cutting metals
- Soldering copper
- Brazing, soldering
- Propulsion of cars
- Heating
- Decarbonization of traditional (internal combustion) engines
- Health (oxygen therapy) - cell needs to output the two gases separately
More about the above with aproximate LPM for each topic in the HHO videos.