What exactly are they selling? (products that convert water into fuel)

In short, most seem to be based on the same principle of generating Brown's Gas (

One of the most simple designs is here. It uses a couple of household items to generate a small amount of HHO. With all of the products, they follow a simple direction:

1. put metal plates in water
2. put salt or baking soda in the water
3. electrify the plates
4. watch the gas leave the water
5a. run the tube into your air filter so the gas finds it's way into your fuel mixture
5b. light a fire and listen to the gas pop


While these can be interesting to watch, this "show and tell" does little more than blanket youtube, metacafe, etc with poorly produced junior high level science projects.

Although you are being urged to install these devices in your personal vehicle, there are no numbers behind the science. Beyond the $49 the plans cost, you're given no engineering information about what this might do to your $10,000 to $40,000 car/truck.

The designs range from tiny to huge, small plates to large plates, little plates and big plates, small input power to large input power. However, there is no information as to "why" one would use a small plate vs a large plate, or why one would use a particular number of plates. There is no reliable information regarding how much energy is produced and how much energy is expended in order to produce the hho.